Ph.D., Natural Sciences, J. W. Goethe University, Frankfurt am Main, Institute for Atmospheric and Environmental Sciences, Germany, 2016
M.Tech., Earth System Science & Technology, Indian Institute of Technology (IIT), Kharagpur, India, 2008
M.Sc., Applied Geology, Allahabad University, Allahabad, India, 2006
B.Sc., Math, Physics, and Chemistry, Allahabad University, Allahabad, India, 2004
Professional Experience
Asst. Project Scientist, JIFRESSE University of California Los Angeles (UCLA), USA (02/2021 – Present)
Postdoctoral Researcher, JIFRESSE UCLA/JPL, USA (11/2017 – 01/2021)
Research Scientist, German Weather Service (DWD), Offenbach/Main, Germany (07/2013 – 09/2016)
Research Scientist, J. W. Goethe University, Frankfurt/Main, Germany (12/2008 – 07/2013)
Research Interests
Ocean Surface Wind / Heat Fluxes
Satellite / in-situ data validation
Atmospheric Rivers
Land-Atmosphere-Ocean interaction
Selected Awards
Qualified Graduate Aptitude Test in Engineering (GATE) – 2006 with All India Rank 92
Awarded assistantship at IIT Kharagpur (2006-2008) by HRD Ministry Govt. of India
Awarded funding from World Meteorological Organization (WMO) to attend the international training course on producing high resolution climate information: scientific basis and application, Seoul, S. Korea, October 13-24, 2013
Selected Publications
Asharaf, S., Guan, B., & Waliser, D. E. (2024). ROTATE: A Coordinate System for Analyzing Atmospheric Rivers. Geophysical Research Letters, 51, e2023GL106736. https://doi.org/10.1029/2023GL106736
Asharaf, S., D.J. Posselt, F. Said, C. Ruf (2023), Updates on CYGNSS Ocean Surface Winds Validation in Tropics, J. Atmospheric and Oceanic Tech.,40(1), 37-51. https://doi.org/10.1175/JTECH-D-21-0168.1
Wang, X., D.E. Waliser, X. Jiang, S. Asharaf, F. Vitart, W. Jie (2023), Evaluating Nortwestern Pacific Tropical Storm Forecast in the Subseasonal to Seasonal Predition Project Database, Frontier in Earth Sciences,10
Asharaf, S., D.E. Waliser, D.J. Posselt, C. Zhang, C. Ruf, A.W. Putra (2021), CYGNSS Ocean Surface Winds Validation in Tropics, J. Atmospheric and Oceanic Tech., 38(4), 711-724.
Ruf, C., S. Asharaf, R. Balasubramaniam, S. Gleason, T. Lang, D. McKague, D. Twigg, D. Waliser (2019): In-Orbit Performance of the Constellation of CYGNSS Hurricane Satellites. Bull. Amer. Meteor. Soc.,100 (10), 2009-2029, doi:10.1175/BAMS-D-18-0337.1.
Crespo, J., Posselt, D. J., S. Asharaf (2019), CYGNSS Surface Heat Flux Product Development, Remote Sensing, 11, 2294.
DeFlorio, M. J., D. E. Waliser, F. M. Ralph, B. Guan, A. Goodman, P. B. Gibson, S. Asharaf, L. Delle Monache, Z. Zhang, A. C. Subramanian, F. Vitart, H. Lin, and A. Kumar (2019), Experimental subseasonal-to-seasonal (S2S) forecasting of atmospheric rivers over the western United States, Journal of Geophysical Research - Atmospheres, 124, 11242-11265.
Nikulin, G., S. Asharaf, M.E., Magarino, S. Calmantie, R.M. Cardoso, J. Bhend, J. Fernandez, M.D. Frias, K. Fröhlich, B. Früh, S.H. Garcia, R. Manzanas, J.M. Gutierrez, U. Hansson, M. Kolax, M.A. Liniger, P.M.M. Soares, C. Sprig, R. Tome, and K. Wyser (2018): Dynamical and statistical downscaling of a global seasonal hindcast in eastern Africa, Climate Services, 9, 72-85.
Asharaf, S., and B. Ahrens (2015): Indian summer monsoon rainfall processes in climate change scenarios, J. Climate., 28, 5414-5429.
Asharaf, S., and B. Ahrens (2013): Soil moisture memory in the regional climate model COSMO-CLM during the Indian summer monsoon season. J. Geophys. Res., 118(12), 6144-6151.
Kumar, P., A. Wiltshire, C. Mathison, S. Asharaf, B. Ahrens, P. Lucas-Picher, J. H. Christensen, A. Gobiet, F. Saeed, S. Hagemann, and D. Jacob (2013): Downscaled climate change projections with uncertainty assessment over India using a high resolution multi-model approach, Science of the Total Environment, 468, 18-30.
Asharaf, S., A. Dobler, and B. Ahrens (2012): Soil moisture-precipitation feedback processes in the Indian summer monsoon season. J. Hydrometeor., 13, 1461-1474.
Lucas-Picher, P., J.H. Christensen, F. Saeed, P. Kumar, S. Asharaf, B. Ahrens, A.J. Wiltshire, D. Jacob, and S. Hagemann (2011): Can regional climate models represent the Indian monsoon? J. Hydrometeor., 12, 849–868.