DRI / DIRECTORY / JOHN MEJIA
John Mejia Profile Photo
Dr. John Mejia
Associate Research Professor, Climatology
Phone 
775-673-7667
E-Mail 
John.Mejia@dri.edu
Full Resume / CV 
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Division 
Atmospheric Sciences

Research Areas

  • Atmospheric modeling and applications
  • Climate dynamics and hydroclimate
  • Big data analytics and uncertainty assessments

Professional Interests

Dr. Mejia’s research makes strong emphasis on areas associated with observing, understanding, modeling, and predicting weather and climate at different spatial and temporal scales. He works on developing methods for representing uncertainty in regional models, and tailoring simulated output for impact applications. Dr. Mejia’s focus involves the development of a regional climate modeling framework for the Western U.S. using Weather Research Forecasting Model (WRF) and the NCAR’s Community Earth System Model to study the impacts of the global and regional aspects of climate change over the complex terrain, and source identification related to systematic errors in climate models. He has extensive experience in development and operation of multi-dimensional and ensemble forecasting models, observational and model data processing, data assimilation, and in the research areas of improvement in atmospheric modeling. Experience operating atmospheric models of different generations to investigate atmospheric dynamics and moist processes; real-time weather forecasting; atmospheric flows over complex terrain and air quality and dispersion modeling; and evaluation methods applied to atmospheric models using aircraft and satellite data.

Dr. Mejia is a professor for the Atmospheric Science Graduate program, University of Nevada, Reno, NV. The coursers taught include Climate Modeling, Atmospheric Modeling, Applied Data Analysis, Atmospheric Turbulence, Mesoscale Modeling. Reviewer member of multiple indexed journals and funding programs and his is involved as an advisory Committee member for broadening STEM and underrepresented minorities in the NSF EPSCoR program in Nevada.

Education and Experience

PhD 2008 University of Oklahoma Meteorology/Regional Climate Modeling
MSc 2002 National Univ. of Colombia Water Resources Management/Hydroclimate
BSc 1999 National Univ. of Colombia Civil Engineering/Hydrology

Professional Experience

Year Experience
2017 Present AssociateResearch Professor, Desert Research Institute, Division of Atmospheric Science, Reno, NV.
2011 2017 Assistant Research Professor, Desert Research Institute, Division of Atmospheric Science, Reno, NV.
2009 2011 Postdoctoral Fellow, Desert Research Institute, Division of Atmospheric Sciences, Reno, NV
2008 2009 Postdoctoral Research Associate, Cooperative Institute for Mesoscale Meteorological Studies/NOAA/National Severe Storms Laboratory. Norman, OK.
2002- 2008 Research Assistant, Cooperative Institute for Mesoscale Meteorological Studies/University of Oklahoma. Data assimilation applications and numerical simulations using Weather Research and Forecasting (WRF) model. Development and implementation of 4-dimensional data assimilation of special field experiment observations.
2000 2002 Research Associate Engineer, Hydrological Atlas of Colombia/Land-Atmosphere Models, Unit of Energy-Mining Management/National University of Colombia.
1998 2002 Research Associate Engineer: ENSO forecasts into reservoir operation and hydroelectric power distribution procedures. Interamerican Institute to the Research of the Climatic Change/National University of Colombia.

Professional Associations

  • Full Member of the American Meteorological Society (AMS)
  • Full Member of the American Geophysical Union (AGU)

Fellowships, Honors, and Awards

  • 2014 Peter B. Wagner Medal of Excellence for DRI Scholars in the Early Stages of Career Development: In recognition of applications of atmospheric models to inform policy development and implementation.
  • 2013 Outstanding Reviewer: American Society of Civil Engineers (ASCE) Journal of Water Resources Planning and Management.
  • Rising Start Award, Nevada, 22nd National NSF ESPCoR conference, Coeur dAlene, Idaho, Oct-2011.
  • NASA Group Achievement Award. Outstanding accomplishment through the coordination of the NASA African M Monsoon Multidisciplinary Analyses (NAMMA), 2008.
  • Member of the winner group in the first place: National Award in Environmental Sciences. Foundation Alejandro Angel Escobar. Hydrologic Atlas of Colombia. September 2007.
  • Awarded to the 2006-2009 Latino Achievement and Heritage Celebration Graduation/Award, University of Oklahoma. Recipient recognition for academic excellence.
  • Member of the winner group in the first place: National Award in Environmental Sciences. Foundation Alejandro Angel Escobar. Water Budget in Colombia. September 2000.
  • Fellowship recipient: Excellent students. National University of Colombia, Graduate program in Water Resources Management. Jan/2000-Feb/2002.
  • Scholarship recipient: Grant to develop MSc Thesis supported by the Research Bureau of the National University of Colombia (DINAIN).
  • Member of the winner group in the second place: Technology and Science award, Water Budget in Colombia. Secretara de Educacin y Cultura de Medelln y el Planetario de Medelln, November, 1999.

Keywords

climate modeling, weather forecasting, north american monsoon, interannual and intraseasonal variability, atmospheric dynamics, dynamical downscaling, hydroclimate, hydrometeorology, urban canopy modeling, air dispersion modeling, energy and water.

 

Publications
2023
Yu, G., Hatchett, B. J., Miller, J. J., Berli, M., Wright, D. B., Mejia, J. F. (2023). Seasonal Storm Characteristics Govern Urban Flash Floods: Insights from the Arid Las Vegas Wash Watershed, Journal of Hydrometeorology, 24 (11), 2105–2123, 10.1175/JHM-D-23-0002.1

2022
Valencia, J., Mejia, J. F. (2022). Projected Changes of Day-to-Day Precipitation and Choco Low-Level Jet Relationships over the Far Eastern Tropical Pacific and Western Colombia from Two CMIP6 GCM Models, Atmosphere, 13, 1776, 10.3390/atmos13111776

Adhikari, P., Mejia, J. F. (2022). Aerosols-precipitation elevation dependence over the Central Himalayas using cloud-resolving WRF-Chem numerical modeling, APC, Atmos. Chem. Phys., 10.5194/acp-2022-652

Ramírez-Cardona, A., Robledo, V., Rendón, A., Henao, J. J., Hernandez, K. S., Rios, S. G., Flórez-Z., J. A., Hernández, S. L., Mejia, J. F. (2022). Algorithm for Tracking Convective Systems (ATRACKCS) (v. 1.0), Zenodo, 10.5281/zenodo.7025989

Adhikari, P., Mejia, J. F. (2022). Impact of transported dust aerosols on precipitation over the Nepal Himalayas using convection-permitting WRF-Chem simulation, Atmospheric Environment: X, 15, 10.1016/j.aeaoa.2022.100179

2021
Henao Castaneda, J. J., Rendón, A. M., Hernández, K. S., Giraldo-Ramirez, P. A., Robledo, V., Posada-Marín, J. A., Bernal, N., Salazar, J. F., Mejia, J. F. (2021). Differential Effects of the COVID-19 Lockdown and Regional Fire on the Air Quality of Medellín, Colombia, Atmosphere, 12 (9), 1137, 10.3390/atmos12091137

Adhikari, P., Mejia, J. F. (2021). Influence of aerosols on clouds, precipitation and freezing level height over the foothills of the Himalayas during the Indian summer monsoon, Clim. Dyn., 57, 395-413, 10.1007/s00382-021-05710-2

2020
Yepes, L., Mejia, J. F., Poveda, G. (2020). Gravity Waves and Other Mechanisms Modulating the Diurnal Precipitation over One of the Rainiest Spots on Earth: Observations and Simulations in 2016, Mon. Wea. Rev., 148, 3933-3950, 10.1175/MWR-D-19-0405.1

Mitchell, D. L., Mejia, J. F., Garnier, A., Tomii, Y., Krämer, M., Hosseinpour, F. E. (2020). An Estimate of Global, Regional and Seasonal Cirrus Cloud Radiative Effects Contributed by Homogeneous Ice Nucleation, Atmos. Chem. Phys. Discuss., Preprint. 10.5194/acp-2020-846

Mejia, J. F. (2020). Running WRF in an Atmospheric Modeling Class: challenges and learning experiences, Atmosfera, 10.20937/ATM.52904

Mejia, J. F., Yepes, L., Henao Castaneda, J. J., Poveda, G., Raymond, D. J., Fuchs-Stone, Z., Zuluaga, M. D. (2020). Towards a Mechanistic Understanding of One of the Rainiest Spots on Earth, J. Geophys. Res. Atmospheres, Discussion.10.1002/essoar.10503572.1

Henao Castaneda, J. J., Mejia, J. F., Rendón, A. M., Salazar, J. F. (2020). Sub-kilometer dispersion simulation of a CO tracer for an inter-Andean urban valley, Atmospheric Pollution Research, 11 (5), 928-945

Mejia, J. F., Furtak-Cole, E., Kumar, N. (2020). Airborne Transmission Pathways of the SARS-CoV-2/COVID-19 in a Classroom Space. Report Prepared for Karsten Heise: Nevada Governor’s Office of Economic Development, December 31, 2020

2019
Dorman, C., Mejia, J. F., Koracin, D. R., McEvoy, D. J. (2019). World Marine Fog Based on 58 years of Ship Observations, International Journal of Climatology, https://doi.org/10.1002/joc.6200

Mejia, J. F., Gillies, J. A., Etyemezian, V. R., Glick, R. (2019). A very-high resolution (20 m) measurement-based dust emissions and dispersion modeling approach for the Oceano Dunes, California, Atmospheric Environment, 218, https://doi.org/10.1016/j.atmosenv.2019.116977

Bandala, E. R., Kebede, K., Jonsson, N., Murray, R., Green, D., Mejia, J. F., Martinez-Austria, P. F. (2019). Extreme heat and mortality rates in Las Vegas, Nevada: Inter-annual variations and thresholds, International Journal of Environmental Science and Technology, 16, 7175-7186, 10.1007/s13762-019-02357-9

Montrone, A., Saito, L., Weisberg, P. J., Gosejohan, M., Merriam, K., Mejia, J. F. (2019). Climate change impacts on vernal pool hydrology and vegetation in northern California, Journal of Hydrology, 574, 1003-1013, 10.1016/j.jhydrol.2019.04.076

Yepes, L., Poveda, G., Mejia, J. F., Moreno, L., Rueda, C. (2019). CHOCO-JEX: A Research Experiment Focused on the CHOCO Low-level Jet over the Far Eastern Pacific and Western Colombia, Bull. Amer. Meteor. Soc., 100 (5), 779-796, 10.1175/BAMS-D-18-0045.1

Henao, J. J., Mejia, J. F., Rendó, A. M., Salazar, J. F. (2019). Sub-kilometer dispersion simulation of a CO tracer in complex terrain, Atmospheric Pollution

McDonough, F., Mejia, J. F. (2019). Model Simulations for 6 Storms that Produced Seedable Snow over the San Juan Mountains: Final Report, October 1, 2019, Prepared for the Dolores Water Conservancy District.

2018
Mejia, J. F., Giordano, M. E., Wilcox, E.M. (2018). Conditional Summertime Day-Ahead Solar Irradiance Forecast, Solar Energy, 163, 610-622, 10.1016/j.solener.2018.01.094

Mejia, J. F., Koracin, D. R., Wilcox, E.M. (2018). Effect of Coupled GCM SST Biases on Simulated Climate of the Western U.S., Intl. J. Climatol., 1-19, 10.1002/joc.5817

Montrone, A., Saito, L., Weisberg, P. J., Gosejohan, M., Iubelt, M., Merriam, K., Mejia, J. F. (2018). Climate Change Impacts on Vernal Pool Hydrology and Vegetation in Northern California, Journal of Hydrology

Yepes, J., Poveda, G., Mejia, J. F., Moreno, L., Rueda, C. (2018). CHOCOJEX: A Research Experiment Focused on the CHOCO Low-level Jet over the Far Eastern Pacific and Western Colombia, Bulletin of the American Meteorological Society

Nauslar, N. J., Hatchett, B. J., Brown, T. J., Kaplan, M. L., Mejia, J. F. (2018). Impact of the North American Monsoon on wildfire activity in the southwest United States, International Journal of Climatology, 10.1002/joc.5899

Campozano, L., Trachte, K., Célleri, R., Samaniego, E., Bendix, J., Albuja, C., Mejia, J. F. (2018). Climatology and Teleconnections of Mesoscale Convective Systems in an Andean Basin in Southern Ecuador: The Case of the Paute Basin, Advances in Meteorology, Article ID: 4259191, 10.1155/2018/4259191

Mejia, J. F., Koracin, D. R., Wilcox, E.M. (2018). Effect of coupled global climate models sea surface temperature biases on simulated climate of the western United States, International Journal of Climatology, 38 (14), 5386-5404, 10.1002/joc.5817

Posada-Marín, J. A., Rendón, A. M., Mejia, J. F., Salazar, J. F., Villegas, J. C. (2018). WRF downscaling improves ERA-Interim representation of precipitation representation during El Niño over tropical Andean valleys during El Niño: Implications for climate change projections, Climate Dynamics, 10.1007/s00382-018-4403-0

McDonough, F., Mejia, J. F. (2018). Model Simulations for 6 Storms that Produced Seedable Snow over the San Juan Mountains, July 31, 2018, Prepared for the Dolores Water Conservation District.

2017
Dorman, C., Mejia, J. F., Koracin, D. R., McEvoy, D. J. (2017). Worldwide Marine Fog Occurrence and Climatology (Book Chapter 3)Chapter : . In Dorman, C. E., Koracin, D. R. (Eds.), Marine Fog: Challenges and Advancements in Observations and Forecasting, Series: Springer Atmospheric Sciences, pp. 7-152. Springer International Publishing: Basel, Switzerland

Jaramillo, L., Poveda, G., Mejia, J. F. (2017). Mesoscale Convective Systems and Other Precipitation Features over the Tropical Americas and Surrounding Seas as Seen by TRMM, Int. J. Climatol., 37, 380-397, 10.1002/joc.5009

Posada-Marín, J. A., Rendón, A. M., Mejia, J. F., Salazar, J. F., Villegas, J. C. (2017). WRF downscaling improves ERA-Interim representation of precipitation representation during El Niño over tropical Andean valleys during El Niño: Implications for climate change projections, Climate Dynamics

Chen, R., McClean, J. L., Gille, S. T., Yulaeva, E., Cerovecki, I., Craig, T., Koracin, D. R., Maltrud, M., McCord, T. E., Mejia, J. F., Hendershott, M. (2017). Effect of atmospheric forcing resolution on the ocean model fidelity on sea level variability in the North Pacific, Ocean Modelling

Nauslar, N. J., Brown, T. J., Kaplan, M. L., Mejia, J. F., Hatchett, B. J. (2017). Examining the North American Monsoon’s impact on wildfire activity in the southwest United States, International Journal of Climatology

McDonough, F., Mejia, J. F., Shourd, K. N., Carroll, R. W., Lutz, A. D., Dean, J., Juchtzer, J. W., Huggins, A. W., Kaplan, M. L., DeLuna, R., Trembath, C. (2017). Weather Modification Feasibility Study – Laramie Range Siting and Design, Level III Study, April 30, 2017, Project report prepared for the Wyoming Water Development Office, Cheyenne, WY.

2016
McEvoy, D. J., Huntington, J. L., Mejia, J. F., Hobbins, M. (2016). Improved seasonal drought forecasts using reference evapotranspiration anomalies, Geophys. Res. Lett., 43 (1), 377-385, 10.1002/2015GL067009

Hatchett, B. J., Koracin, D. R., Mejia, J. F., Boyle, D. P. (2016). Assimilating urban heat island effects into climate projections, J. Arid Environ., 128, 59-64, 10.1016/j.jaridenv.2016.01.007

Mejia, J. F., Douglas, M. W., Lamb, P. J. (2016). Observational Investigation of Relationships between Moisture Surges and Mesoscale-to-Large Scale Convection during the North American Monsoon, Int. J. Climatol., 36, 2555-2569

Douglas, M. W., Beida, R., Mejia, J. F., Fuentes, M. (2016). Developing MODIS-based cloud climatologies to aid species distribution modeling and conservation activities, Frontiers of Biogeography, 8 (3), 21 p. 10.21425/F58329532

Mejia, J. F., McDonough, F. (2016). WRF Simulations for 8 Storms That Produced Seedable Clouds and Precipitation Over the Upper Colorado River Basin, 53 p.. Desert Research Institute: Reno, NV, A report to Colorado Water Conservation Board and Wilson Water Group.

Dorman, C., Mejia, J. F., Koracin, D. R., McEvoy, D. J. (2016). Worldwide Marine Fog Occurrence and ClimatologyChapter 3: . In Koracin, D. R., Dorman, C. (Eds.), Marine Fog – Challenges and Advancements in Observations and Forecasting

Elias, E., Rango, A., Steele, C. M., Mejia, J. F., Baca, R., James, D., Gronemeyer, P. (2016). Simulated Impact of Climate Change on Hydrology of Multiple Watersheds Using Traditional and Recommended Snowmelt Runoff Model Methodology, Journal of Water and Climate Change, 7 (4), 665-682, 10.2166/wcc.2016.097

Mejia, J. F., McDonough, F. (2016). Lagrangian Particle Tracking Dispersion and Regional Climate Modeling McDonough, F., Mejia, J. F., Shourd, K. N., Carroll, R. W., Lutz, A. D., Dean, J., Juchtzer, J. W., Huggins, A. W., Kaplan, M. L. (Eds.) , Weather Modification–Laramie Range Siting and Design – Level III Study, 167 p.. Desert Research Institute: Reno, NV, A report to Wyoming Water Development Office.

2015
Backes, T. M., Kaplan, M. L., Schumer, R., Mejia, J. F. (2015). A Climatology of the Vertical Structure of Water Vapor Transport to the Sierra Nevada in Cool Season Atmospheric River Precipitation Events, J. Hydrometeor., 16 (3), 1029-1047 , 10.1175/JHM-D-14-0077.1

Elias, E., Rango, A., Steele, C., Mejia, J. F., Smith, R. (2015). Assessing climate change impacts on water availability of snowmelt-dominated basins of the Upper Rio Grande Basin, J. Hydrology: Regional Studies, 3 (6), 525-546, 10.1016/j.ejrh.2015.04.004

Mejia, J. F., Fenstermaker, L.F., Etyemezian, V. R., Miller, J. J., Jiang, P., Nikolich, G., Gillies, J. A., Lomeli-Uribe, E. A. (2015). Strategies for climate change adaptation at the Armstrong (formerly Dryden) Flight Research Center and within the Mojave Desert Region, A report to NASA AFRC.

McEvoy, D. J., Huntington, J. L., Mejia, J. F., Hobbins, M. T. (2015). Improved Seasonal Drought Forecasts using Reference Evapotranspiration Anomalies, Geophysical Research Letters

2014
McEvoy, D. J., Mejia, J. F., Huntington, J. L. (2014). Use of an Observation Network in the Great Basin to Evaluate Gridded Climate Data, J. Hydrometeorol., 15, 1913-1931

Mejia, J. F., Fenstermaker, L.F., Etyemezian, V. R., Miller, J. J. (2014). NASA Award Number NNX12AF57G: Strategies for climate change adaptation at the Dryden Flight Research Center and within the Mojave Desert region (Project report Year 3)

2013
Dorman, C. E., Mejia, J. F., Koracin, D. R. (2013). Impact of US west coastline inhomogeneity and synoptic forcing on winds, wind stress, and wind stress curl during upwelling season, J. Geophys. Res.-0ceans, 118 (9), 4036-4051, 10.1002/jgrc.20282

Mejia, J. F., Fenstermaker, L.F., Etyemezian, V. R., Miller, J. J. (2013). Strategies for Climate Change Adaptation at the Dryden Flight Research Center and within the Mojave Desert Region [NASA Award Number NNX12AF57G, Project Report, Year 2]

2012
Mejia, J. F., Huntington, J. L., Hatchett, B. J., Koracin, D. R., Niswonger, R. G. (2012). Linking Global Climate Models to an Integrated Hydrologic Model Using an Individual Station Downscaling Approach, Journal of Contemporary Water Research and Education

Mejia, J. F., Hatchett, B. J., Niswonger, R. G., Huntington, J. L., Koracin, D. R. (2012). Linking global climate models to an integrated hydrologic model: Using an individual station downscaling approach, J. Contemporary Water Res. & Educ., 147, 17-27

2010
Mejia, J. F., Douglas, M. W., Lamb, P. J. (2010). Aircraft Observations of the 12-15 July 2004 Moisture Surge Event during the North American Monsoon Experiment, Mon Wea Rev, 138, 3498-3513, doi:10.1175/2010MWR3228.1

Conference Proceedings
2024
Erfani, E., Mitchell, D. L., Mejia, J. F. (2024). Improving Simulations of Cirrus Cloud Thinning by Utilizing Satellite Retrievals. American Meteorological Society (AMS) Annual Meeting: Baltimore, MD, January 28, 2024-February 1, 2024, http://doi.org/10.13140/RG.2.2.16778.03527

Erfani, E., Mitchell, D. L., Mejia, J. F., Kumar, N. (2024). Employing Satellite Retrievals of Cirrus Clouds for a Realistic Modeling of Cirrus Cloud Thinning. Gordon Research Conference on Climate Engineering: Lucca, Italy, February 18, 2024-February 23, 2024, http://dx.doi.org/10.13140/RG.2.2.26280.79363

2023
Erfani, E., Mitchell, D. L., Mejia, J. F., Kumar, N. (2023). Cirrus Cloud Thinning (CCT). Earth’s Radiation Budget (ERB) Science Meeting: Boulder, CO, USA, November 6, 2023, http://doi.org/10.13140/RG.2.2.31583.02725

2022
McDonough, F., Mejia, J. F. (2022). Analyzing Winter Storms and Their Cloud Seeding Potential Over the San Juan Mountains of Colorado. AMS 23rd Conference on Planned and Inadvertent Weather Modification: Houston, TX, January 22, 2022-January 27, 2022

Mitchell, D. L., Mejia, J. F., Garnier, A. (2022). How realistic are explicit CCT simulations in climate models?, Gordon Research Conference on Climate Engineering: Sunday River, Maine, June 26, 2022-July 1, 2022

Mitchell, D. L., Garnier, A., Mejia, J. F. (2022). Evidence of relatively high contributions of homogeneous ice nucleation over land during winter at mid-to-high latitudes, with comparisons against global climate model predictions, AMS Collective Madison Meeting, 16th Conference on Cloud Physics: Madison, WI, August 8, 2022-August 12, 2022

Jimenez, M., Ávila, A. C., Sánchez, G. J., Martínez Mancera, A. R., Chicaeme Ordoñez, K. A., Mejia, J. F. (2022). Understanding Sea Fog Variability in King George Island, Antarctica using Special Observations and Cloud-Resolving Simulations, AGU Fall Meeting: Chicago, IL, December 12, 2022-December 16, 2022, Paper No. A12H-08

Mejia, J. F., Henao, J. J. (2022). Role Of Clouds in Houston’s Urban Heat Island and Extreme Heat, AGU Fall Meeting: Chicago, Illinois, December 12, 2022-December 16, 2022

Robledo, V., Rendón, A., Henao, J. J., Mejia, J. F., Ramirez, A., Hernandez, K. S., Rios, S. G. (2022). Climatological Characteristics of Deep Convection in Northwestern South America Using a Persistence Tracking Technique, AGU Fall Meeting: Chicago, IL, December 12, 2022-December 16, 2022, Paper No. A45H-02

2021
Mitchell, D. L., Mejia, J. F., Garnier, A. (2021). How realistic are explicit CCT simulations in climate models?. Climate Engineering in Context Conference: Potsdam, Germany, October 4, 2021-October 8, 2021

Saher, R., Mejia, J. F. (2021). Efficacy of White Roofs in Urban Outdoor Thermal Comfort. American Geophysical Union Fall Meeting: New Orleans, LA, December 13, 2021-December 17, 2021

2020
Tomii, Y., Hosseinpour, F. E., Mejia, J. F., Mitchell, D. L. (2020). An evaluation of cirrus cloud thinning through improved integration of satellite retrievals and climate modeling. American Meteorological Society Annual Meeting (100th anniversary): Boston, MA, January 12, 2020-January 17, 2020

Mejia, J. F., Henao Castaneda, J. J. (2020). Mesoscale Convective Systems over the rainiest spot on Earth: OTREC field campaign and Cloud-Resolving Simulations. American Geophysical Union Fall Meeting: [Virtual]

Mitchell, D. L., Mejia, J. F., Tomii, Y., Hosseinpour, F. E. (2020). Combining measurements by satellite and aircraft with climate modeling to evaluate the efficacy of cirrus cloud thinning. American Geophysical Union Fall Meeting: [Virtual]

Chicaeme-Ordoñez, K. A., Mejia, J. F. (2020). Climatology of the icing potential and events of freezing over the Colombian continental territory. American Geophysical Union Fall Meeting: [Virtual], Paper A256-07.

Adhikari, P., Mejia, J. F. (2020). Impact of transported dust aerosols on precipitation over the central Himalayas using convection permitting WRF-Chem Simulation. American Geophysical Union Fall Meeting: [Virtual]

McDonough, F., Mejia, J. F. (2020). Assessing the Cloud Structures of a 1980 Icing Accident Using In Situ Data from a Research Aircraft and a High-Resolution Model. 100th American Meteorological Society Annual Meeting: Boston, MA, January 12, 2020-January 17, 2020

McDonough, F., Mejia, J. F. (2020). Assessing and Validating Cloud Seeding Plume Targeting Using a High-Resolution WRF Model, a Dispersion Model, and Snow Trace Chemistry. 100th American Meteorological Society Annual Meeting: Boston, MA, January 12, 2020-January 17, 2020

2019
Mitchell, D. L., Mejia, J. F., Tomii, Y., Garnier, A. (2019). On the potential role of Arctic cirrus clouds in producing anomalous mid-latitude weather and climate. CESM Atmosphere Model Working Group (AMWG) Meeting, National Center for Atmospheric Research (NCAR): Boulder, CO, February 19, 2019-February 21, 2019

Mitchell, D. L., Tomii, Y., Mejia, J. F., Garnier, A. (2019). Constraining WACCM6 cirrus cloud microphysics with CALIPSO (IIR-CALIOP) effective diameter retrievals. American Geophysical Union Fall Meeting: San Francisco, CA, December 9, 2019-December 13, 2019

Mitchell, D. L., Mejia, J. F., Tomii, Y., Hosseinpour, F. E. (2019). Evaluating cirrus cloud thinning using CALIPSO retrievals and the Whole Atmosphere Community Climate Model v. 6. Invited presentation, Geoengineering Modeling Research Consortium (GMRC), Harvard University, School of Engineering and Applied Sciences (SEAS): Cambridge, MA, September 30, 2019

Adhikari, P., Mejia, J. F. (2019). Influence of aerosols on precipitation and vertical temperature distribution over the foothills of Himalayas during the Indian summer monsoon. AGU Fall Meeting: San Francisco, CA, December 9, 2019-December 13, 2019

Angel, M. C., Mejia, J. F. (2019). Climate Forecast System model heat wave climatology and forecast skill at subseasonal time scales. AGU Fall Meeting: San Francisco, CA, December 9, 2019-December 13, 2019

Mejia, J. F., Yepes, L., Poveda, G., Zuluaga, M. D. (2019). Towards a Mechanistic Understanding of One of the Rainiest Spots on Earth. AGU Fall Meeting: San Francisco, CA, December 9, 2019-December 13, 2019

Yepes, L., Mejia, J. F., Poveda, G., Mapes, B. E. (2019). On the Choco Low-level Jet and gravity waves over the rainiest place on Earth: Observations and Simulations during CHOCO-JEX. AGU Fall Meeting: San Francisco, CA, December 9, 2019-December 13, 2019

Marin, J., Mejia, J. F., Bezanilla, A., Pozo, D., Vichot, A., Borrajero, I. (2019). Convection Parameterization Sensitivity and Hurricane Statistics over the Inter-Americas region. AGU Fall Meeting: San Francisco, CA, December 9, 2019-December 13, 2019

McDonough, F., Mejia, J. F. (2019). The San Juan Cloud Seeding Cloud Seeding Study: Final Report. San Juan Water Conservancy District Meeting: Pagosa Springs, CO, October 9, 2019

2018
Mitchell, D. L., Mejia, J. F., Garnier, A., Erfani, E. (2018). On the feasibility of cirrus cloud thinning (CCT): A surprising coincidence. 98th AMS Annual Meeting, 21st Conference on Planned and Inadvertent Weather Modification, joint session with Aerosol-Cloud-Climate Interactions on Climate Engineering and Inadvertent Weather Modification: Austin, TX, January 7, 2018-January 11, 2018

Mitchell, D. L., Mejia, J. F., Garnier, A., Hosseinpour, F. E. (2018). Comparing standard CAM5 against “CALIPSO Cirrus CAM5” and the need for a better cirrus cloud parameterization. CESM Atmosphere Model Working Group (AMWG) Annual Meeting, National Center for Atmospheric Research: Boulder, CO, February 12, 2018-February 14, 2018

Mitchell, D. L., Mejia, J. F., Garnier, A., Hosseinpour, F. E. (2018). Can changes in cirrus cloud ice nucleation affect the jet stream and storm track?. Atmospheric Radiation Conference, American Meteorological Society: Vancouver, BC, Canada, July 9, 2018-July 13, 2018

Mosadegh Anbaran, E., Mejia, J. F., Wilcox, E.M., Rayne, S. (2018). Vehicle Miles Travel (VMT) trends over Lake Tahoe area and its effect on Nitrogen Deposition, American Geophysical Union Fall Meeting: Washington D.C., December 10, 2018-December 14, 2018, A23M-1803

Mejia, J. F., Wilcox, E.M., Angel, M. C. (2018). Improved skill in North American multi-model ensemble for the Americas, IV International Conference on El Niño Southern Oscillation: ENSO in a warmer Climate (Guayaquil, Ecuador), October 16, 2018-October 18, 2018

Dorman, C. E., Mejia, J. F., Koracin, D. R. (2018). Fog Trend and Interannual-to-Decadal Variability. Canadian Meteorological and Oceanographic Society Congress: Halifax, Canada, June 10, 2018-June 14, 2018

Henao, J. J., Mejia, J. F., Salazar, J. F., Rendón, A. (2018). Dispersion of mobile emissions at sub-kilometer scales for the Aburra Valley in Colombia: Emission disaggregation, identification of pollution hotspots, and scenario evaluation. American Geophysical Union Fall Meeting: Washington, DC, December 10, 2018-December 14, 2018

Rendón, A., Posada, J. A., Henao, J. J., Salazar, J. F., Quintero, O. L., Bernal, N., Mejia, J. F. (2018). WRF Simulation of the Urban Heat Island and its Impact on Wind Dynamics and Air Pollution Transport Mechanisms in a Densely Populated Urban Valley of the Tropical Andes. American Geophysical Union Fall Meeting: Washington, DC, December 10, 2018-December 14, 2018

Mitchell, D. L., Mejia, J. F., Garnier, A., Hosseinpour, F. E. (2018). On the Potential Role of Arctic Cirrus Clouds in Predicting Anomalous Mid-Latitude Weather and Climate. American Geophysical Union Fall Meeting: Washington, DC, December 10, 2018-December 14, 2018

Mejia, J. F., Gillies, J. A., Etyemezian, V. R. (2018). Very-high resolution (20 m) flow and dust dispersion modeling: Oceano Dunes, Oceano, CA. 10th International Conference on Aeolian Research: Bordeaux, France, June 25, 2018-June 29, 2018

McDonough, F., Mejia, J. F., Shourd, K. N. (2018). Assessing the Cloud Seeding Potential over the Laramie Mountains in Wyoming. AMS 21st Conference on Planned and Inadvertent Weather Modification: Austin, TX, January 7, 2018-January 12, 2018

2017
Douglas, M., Mejia, J. F., Beida, R. (2017). Developing MODIS-Based Cloud Climatologies for Biogeographical Applications: Current Procedures and Next Steps. 8th Biennial Conference, Intenational Biogeography Society: Tucson, AZ, January 2017.

Mitchell, D. L., Mejia, J. F., Garnier, A., Avery, M. (2017). A potential radiative forcing error from the cirrus cloud pre-existing ice assumption. CESM Atmosphere Model Working Group (AMWG) Annual Meeting: National Center for Atmospheric Research, February 27, 2017-March 1, 2017

Mitchell, D. L., Garnier, A., Mejia, J. F., Avery, M. (2017). The seasonal cycle of Arctic cirrus clouds and its possible relevance to jet steam dynamics. Fourth Santa Fe Conference on Global and Regional Climate Change: Santa Fe, NM, February 5, 2017-February 10, 2017

Giordano, M. E., Mejia, J. F., Wilcox, E.M. (2017). On Conditional Summertime Day-Ahead Solar Irradiance Forecasting: Development Beyond Numerical Weather Prediction Models. Solar energy-water-environment nexus in Nevada annual meeting: Las Vegas, NV, March 27, 2017-March 29, 2017

Mejia, J. F. (2017). Atmospheric Modeling for Air Pollution Problems. Workshop on Atmospheric Pollution and Its Impact on Human Health, Agriculture and Natural Ecosystems: A Mathematical Modeling Perspective: Medellín, Colombia, September 25, 2017-September 27, 2017, Invited presentation.

Mejia, J. F. (2017). Improvement of the multimodel super-ensemble technique for seasonal forecasts. Servicio Nacional de Hidrología y Meteorología (SENAHMI): Lima, Peru, Invited presentation.

Mejia, J. F., Wilcox, E.M. (2017). Long Range Weather Forecasting: Improvement of the Multimodel Super-Ensemble Technique for Seasonal Forecasts. Fifth Annual California Utility Forecasting Meeting (CUFM ’17): San Diego, CA, June 12, 2017, Invited presentation.

Angel, M. C., Mejia, J. F., Chang, H., Ochoa, C. A., Castro, C. L. (2017). Annual and diurnal precipitation bimodal distributions as simulated by WRF-based CORDEX–Central America. Regional Climate Modeling I, American Geophysical Union Fall Meeting: New Orleans, LA

Mitchell, D. L., Mejia, J. F., Garnier, A., Hosseinpour, F. E., Avery, M. A. (2017). A potential regulation of jet stream behavior by changes in Arctic cirrus cloud formation mechanism and coverage. Session Proposal: A54G The Dynamics of the Large-Scale Atmospheric Circulation in Present and Future Climates: Jet Streams, Storm Tracks, Stationary Waves, and Monsoons III, American Geophysical Union Fall Meeting: New Orleans, LA, December 11, 2017-December 15, 2017

Yepes, J., Mejia, J. F., Poveda, G. (2017). ChocoJEX: A research programme focus on the Choco low level jet over the far eastern Pacific and Western Colombia – Reanalysis Evaluation. 5th International Conference on Reanalysis: Rome, Italy, November 2017.

Vallejo-Bernal, S., Yepes, J., Poveda, G., Mejia, J. F. (2017). Validación de la Precipitación Modelada con WRF Mediante Información del Satélite TRMM sobre el Trópico Americano. Seminario Nacional de Ciencias y Tecnologías del Mar – SENALMAR: Medellín, Colombia, October 2017.

2016
Wilcox, E.M., Mejia, J. F., Shan, Y., Giordano, M. E. (2016). Solar Irradiance Forecasting. Solar Energy-Water-Environment Nexus in Nevada Annual Meeting: Reno, March 14, 2016-March 15, 2016

Rendón, A., Posada, J. A., Salazar, J. F., Mejia, J. F., Villegas, J. (2016). WRF Improves Downscaled Precipitation During El Niño Events Over Complex Terrain in Northern South America: Implications for Deforestation Studies. AGU Fall Meeting: San Francisco, CA, December 12, 2016-December 16, 2016

Yepes, J., Poveda, G., Mejia, J. F., Cabeza, L., Rueda, D. C. (2016). CHOCO-JEX: A Research Programme Focused on the CHOCO Low-Level Jet over the Far Eastern Pacific and Western Colombia ? Initial Results,, 8th EGU Leonardo Conference – Series on the Hydrological Cycle: Ourense, Spain, October 25, 2016-October 27, 2016, 10.13140/RG.2.2.36532.65925

Chen, C., Ahmad, S., Mejia, J. F., Kalra, A. (2016). Study of Lehman Creek Watershed’s Hydrologic Response to Climate Change Using Downscaled CMIP5 Projections Pathak, C. S., Reinhart, D. (Eds.) , Proceedings, 508-517. World Environmental and Water Resources Congress 2016: West Palm Beach, FL, May 22, 2016-May 26, 2016, 10.1061/9780784479872.052

Mitchell, D. L., Garnier, A., Mejia, J. F., Avery, M. A., Erfani, E. (2016). Insights on the Feasibility, Modeling and Field Testing of Cirrus Cloud Thinning from Satellite Remote Sensing. Poster, AGU Fall Meeting: San Francisco, CA, December 12, 2016-December 16, 2016

Mujtaba, S. M., Husain, T., Mejia, J. F., Alharbi, B. (2016). Identifying Appropriate Chemical Mechanisms for Photochemical Air Quality Modeling in Arid Regions. A&WMA’s 109th Annual Conference: New Orleans, LA, June 20, 2016-June 23, 2016

2015
McEvoy, D. J., Hobbins, M., Huntington, J. L., Mejia, J. F., Hain, C., Anderson, M., Verdin, J. (2015). Exploring the use of physically based evaporative demand anomalies to improve seasonal drought prediction. Nevada Water Resources Association

2014
McEvoy, D. J., Mejia, J. F. (2014). Regional Climate Simulations of Cold Season Precipitation over the Great Basin. Presentation at the AMS 26th Conference on Climate Variability and Change, 94th AMS Annual Meeting: Atlanta, GA, February 2, 2014

Mejia, J. F., Etyemezian, V. R., Fenstermaker, L.F., Miller, J. J., Nikolich, G. (2014). Climate Change Impacts at NASA ARMSTRONG (Dryden) flight research Center. NASA CASI/ROSES 4th Annual Climate Adaptation Workshop: Palmdale, CA, January 23, 2014

McEvoy, D. J., Hobbins, M., Mejia, J. F., Hain, C., Anderson, M., Verdin, J. (2014). Exploring the use of physically based evaporative demand anomalies to improve seasonal drought prediction. American Geophysical Union 2014 Fall Conference: San Francisco, CA, December 15, 2014-December 19, 2014

Dorman, C. E., Mejia, J. F., Koracin, D. R., McEvoy, D. J. (2014). Long Term Increase In Fog Occurrence Over The NW Pacific And NW Atlantic Fog Maximums, Decadal-Multidecadal variability in Pacific and Atlantic basins. Poster, AMS 94th annual Meeting 2014: Atlanta, GA, February 2, 2014

Dorman, C. E., Mejia, J. F., Koracin, D. R., McDoulett, M. C. (2014). Interaction of the Marine Atmosphere, Coastal Topography and Sea Surface Temperature on Marine Fog Distribution Along the West Coast of North America: Atmosphere, Biosphere, Land, and Ocean Interactions. 2014 AGU Fall Meeting: San Francisco, CA, December 15, 2014

Douglas, M. W., Rahama, B., Mejia, J. F. (2014). A Very High Resolution Cloud Climatology of Mexico. Union Geofisica Mexicana (Mexican Geophysical Union): Puerto Vallarta, Mexico, November 3, 2014

Elias, E., Rango, A., Steele, C., Mejia, J. F., Baca, R., James, D., Schrader, S. (2014). Simulated Impact of Climate Change on Hydrology of Multiple Watersheds Using Traditional and Recommended Snowmelt Runoff Model Methodology, Advancing Hydrologic Predictions in Snow- and Glacier-Fed River Systems. 2014 AGU Fall Meeting: San Francisco, CA, December 15, 2014

Mejia, J. F., Huntington, J. L., Niswonger, R. G. (2014). Uncertainty Transfer in Modeling Layers: From GCM to downscaling to hydrologic surface-groundwater modeling, In: Ames, D.P., Quinn, N.W.T., Rizzoli, A.E. (Eds.),. Proceedings of the 7th International Congress on Environmental Modelling and Software: San Diego, CA, June 15, 2014

Mitchell, D. L., Mishra, S., Comstock, J., Lohmann, U., Kuebbeler, M., Mejia, J. F., Turner, D., Rasch, P. (2014). Relevance of the negative Twomey effect for cirrus clouds. 94th Annual Meeting of the American Meteorological Society: Atlanta, GA, February 6, 2015

2013
Koracin, D. R., Mejia, J. F., King, K. C., Dorman, C. E. (2013). Upwelling and Coastal Climate, Climate Trends and Projections in the Coastal Environment?Part I. Presented at the 11th Symposium on the Coastal Environment, 93rd American Meteorological Society Annual Meeting: Austin, TX, January 5, 2013

Mitchell, D. L., Mejia, J. F., Kuebbeler, M., Lohmann, U., Xiao, M. (2013). Seeding of Cirrus Clouds to Reduce Global Warming, Applications of Numerical Models to Weather and Climate Modification,. 19th Conference on Planned and Inadvertent Weather Modification, 93rd American Meteorological Society Annual Meeting: Austin, TX, January 6, 2013

Perryman Rayne, N. M., Mejia, J. F. (2013). Atmospheric Rivers in Regional Climate Models for the Western U.S.. Poster presentation at the 25th Conference on Climate Variability and Change, 93rd American Meteorological Society Annual Meeting: Austin, TX, January 5, 2013

Sauceda, D. O., Huntington, J. L., Mejia, J. F. (2013). Vulnerability and Resilience of Urban Water Systems under Uncertain Climate Change Scenarios. Poster presentation at the 25th Conference on Climate Variability and Change, 93rd American Meteorological Society Annual Meeting: Austin, TX, January 5, 2013

Elias, E., Steele, C. M., Rango, A., Mejia, J. F. (2013). Assessing climate change impacts on water availability of snowmelt dominated watersheds of the Upper Rio Grande Advances in Hydrometeorological Predictions and Applications. AGU Fall Meeting: San Francisco, CA, December 9, 2013

Mitchell, D. L., Mejia, J. F., Lohmann, U., Kuebbeler, M., Mishra, S., Comstock, J., Rasch, P. (2013). Microphysical and radiative impacts of the cirrus cloud negative Twomey effect in two GCMs based on SPARTICUS data. Oral presentation, Atmospheric System Research (ASR) 2013 Fall Working Groups,: Washington, D.C., November 4, 2013

Mitchell, D. L., Mejia, J. F., Kuebbeler, M., Xiao, M., Rasch, P. (2013). Cirrus Cloud Climate Engineering. Oral presentation at the AMS Annual Meeting: Austin, TX, January 6, 2013

Mitchell, D. L., Mishra, S., Comstock, J., Mejia, J. F., Kuebbeler, M., Lohmann, U. (2013). Relevance of the negative Twomey effect for ice clouds. Poster presentation, Gordon Research Conference: Radiation and Climate: New London, NH, July 6, 2013

Mitchell, D. L., Mejia, J. F., Kuebbeler, M., Lohmann, U., Mishra, S., Comstock, J. (2013). Constraining the Negative Twomey Effect for Cirrus Clouds. Poster presentation, Gordon Research Conference: Radiation and Climate: New London, NH, July 6, 2013

Perryman Rayne, N. M., Mejia, J. F. (2013). Development and Application of a Reanalysis-Based Atmospheric River Detection Algorithm, Novel Application of Observations to the Evaluation of Regional Climate Models. AGU Fall Meeting: San Francisco, CA, December 9, 2013

Rango, A., Caitriana, M., Steele, M., Elias, E., Mejia, J. F., Fernald, A. (2013). Potential impacts of climate warming on runoff from snowmelt: a case study of two mountainous basins in the Upper Rio Grande, Advances in Hydrometeorological Predictions and Applications. AGU Fall Meeting: San Francisco, CA, December 9, 2013

Backes, T. M., Schumer, R., Kaplan, M. L., Redmond, K. T., Mejia, J. F. (2013). Combined effect of mid-level jets and atmospheric rivers on winter precipitation in the eastern Sierra Nevada, Vol. 1, p. 1281. Proceedings, In AGU Fall Meeting Abstracts: San Francisco, CA, December 9, 2013

2012
Dorman, C. E., Mejia, J. F., Koracin, D. R. (2012). Simulation of Atmospheric Marine Layer off Southern Oregon and Northern California. 92nd American Meteorological Society Annual Meeting, 10th Symposium on the Coastal Environment: New Orleans, LA, January 22, 2012

Hatchett, B. J., Koracin, D. R., Mejia, J. F. (2012). Untangling the extreme urban heat island of the arid, complex terrain city of Reno, NV. Presentation at the Third Annual Symposium on Environment and Health, 92nd Annual American Meteorological Society Meeting: New Orleans, LA, January 22, 2012

Hatchett, B. J., Dorman, C. E., Jiang, J., Kaplan, M. L., Koracin, D. R., Mejia, J. F., McCord, T. E., Vellore, R. (2012). Midtropospheric Response to a Siberian Cold Air Outbreak over the Kuroshio Current in the Pacific Basin, Dynamics and Predictability of Midlatitude Storms in a Changing Climate. Presentation at AGU Fall Meeting: San Francisco, CA, December 3, 2012

Jericevic, A., Koracin, D. R., Mejia, J. F., Chow, J. C., Watson, J. G., Fujita, E. M., Minoura, A. (2012). Integrated approach for analysis of the nonlinear interactions of pollutants in coastal areas due to climate change. Presentation, ITM – NATO/SPS International Technical Meeting on Air Pollution Modelling and its Application: The Netherlands, May 7, 2012

King, K. C., Mejia, J. F., McEvoy, D. J., Koracin, D. R. (2012). Evaluation of Regional Downscaling Predictions of Future Drought Probabilities in the Western United States. AMS 92nd Annual Meeting: New Orleans, LA, January 22, 2012

King, K. C., Mejia, J. F., Koracin, D. R. (2012). : Interannual variability of Surface Temperature and Precipitation using Regional Climate Modeling over Western United States. 4th Annual EPSCoR Western Consortium Tri-State Meeting: Sun Valley, ID, April 2, 2012

Koracin, D. R., King, K. C., Mejia, J. F., Dorman, C. E., Kunkel, K. E. (2012). Current Issues and Challenges in Climate Predictions of Coastal Upwelling. 92nd American Meteorological Society Annual Meeting, 10th Symposium on the Coastal Environment: New Orleans, LA, January 22, 2012

Koracin, D. R., Vellore, R., Mejia, J. F., Jiang, J., Dorman, C. E., Cerovecki, I., McClean, J., Hendershott, M. C. (2012). Mesoscale atmospheric and ocean dynamics over Kuroshio Extension region: AGU-OSLO-Ocean. Presentation, Ocean Sciences Meeting: Salt Lake City, UT, February 20, 2012

Koracin, D. R., Hatchett, B. J., Dorman, C. E., Cerovecki, I., Jiang, J., Vellore, R., Mejia, J. F., McCord, T. E. (2012). Air-sea Interaction over the Kuroshio Current during a Cold-air Outbreak, Boundary Layer Processes in the Climate System. AGU Fall Meeting: San Francisco, CA, December 3, 2012

Mejia, J. F., Koracin, D. R. (2012). Correcting GCM SST Biases to Improve RCM Simulations Over Coastal Upwelling Dominated Regimes. 92nd American Meteorological Society Annual Meeting, 10th Symposium on the Coastal Environment: New Orleans, LA, January 22, 2012

Mejia, J. F., Perryman Rayne, N. M. (2012). Climatological Impact of Atmospheric River Based on NARCCAP and DRI-RCM Datasets, Findings From Climate Change Assessments: Posters From the US National Climate Assessment and the North American Regional Climate Change Assessment Program. AGU Fall Meeeting: San Francisco, CA, December 3, 2012

Mitchell, D. L., Mejia, J. F., Xiao, M., Rasch, P. J., Kuebbeler, M. (2012). Cirrus Cloud Climate Engineering. International Conference on Clouds and Precipitation (ICCP): Leipzig, Germany, July 30, 2012-August 3, 2012

2011
Hatchett, B. J., Mejia, J. F., Huntington, J. L., Koracin, D. R. (2011). Evaluation of three climate downscaling techniques in forcing a coupled hydrological model in a snow-dominated watershed in the Lake Tahoe basin. 91st American Meteorological Society Meeting: Seattle

2010
Hatchett, B. J., Kaplan, M. L., Koracin, D. R., Mejia, J. F. (2010). Playing CSI: A case study of the November 12, 2009 Bozeman, Montana Snow Event, Proceedings of the 2010 International Snow Science Workshop

Other
2020
Mejia, J. F., Poveda, G. (2020). Upper-air measurements at Nuquí, Colombia. Version 1.0. UCAR/NCAR – Earth Observing Laboratory, March 31, 2020, 10.26023/M951-SXZK-NF0N

2017
Fearon, M. G., Kaplan, M. L., Mejia, J. F. (2017). Hurricane Sandy (2012). Part II: The dynamics within the local environment preceding rapid development, in revision mode for resubmission

Fearon, M. G., Kaplan, M. L., Mejia, J. F. (2017). Hurricane Sandy (2012). Part I: The tropical-extratropical environment preceding incipient development, in revision mode for resubmission