Sciences and Exploration Directorate

Ali Tokay

(RESEARCH SCIENTIST)

Ali Tokay's Contact Card & Information.
Email: ali.tokay-1@nasa.gov
Phone: 301.614.6140
Org Code: 612
Address:
NASA/GSFC
Mail Code 612
Greenbelt, MD 20771
Employer: UNIVERSITY OF MARYLAND BALTIMORE CO

Teaching Experience


UMBC GES 311 Weather and Climate (1998-present)

Professional Service


Chair, American Meteorology Society Radar Meteorology Committee

Publications


Refereed

2022. "Snow microphysical retrieval from the NASA D3R radar during ICE-POP 2018." Atmospheric Measurement Techniques 15 (5): 1439-1464 [10.5194/amt-15-1439-2022] [Journal Article/Letter]

2020. "The GPM Validation Network and Evaluation of Satellite-Based Retrievals of the Rain Drop Size Distribution." Atmosphere 11 (9): 1010 [10.3390/atmos11091010] [Journal Article/Letter]

2020. "Comparison of Raindrop Size Distribution between NASA’s S-Band Polarimetric Radar and Two-Dimensional Video Disdrometers." Journal of Applied Meteorology and Climatology 59 (3): 517-533 [10.1175/jamc-d-18-0339.1] [Journal Article/Letter]

2020. "Development and Evaluation of the Raindrop Size Distribution Parameters for the NASA Global Precipitation Measurement Mission Ground Validation Program." Journal of Atmospheric and Oceanic Technology 37 JTECH-D-18-0071.1 [10.1175/jtech-d-18-0071.1] [Journal Article/Letter]

2017. "A Field Study of Footprint-Scale Variability of Raindrop Size Distribution." Journal of Hydrometeorology 18 (12): 3165-3179 [10.1175/jhm-d-17-0003.1] [Journal Article/Letter]

2016. "A Novel Approach to Identify Sources of Errors in IMERG for GPM Ground Validation." Journal of Hydrometeorology 17 (9): 2477–2491 [10.1175/jhm-d-16-0079.1] [Journal Article/Letter]

2016. "The Midlatitude Continental Convective Clouds Experiment (MC3E)." Bulletin of the American Meteorological Society [10.1175/BAMS-D-14-00228.1] [Journal Article/Letter]

2016. "A Field Study of Pixel-Scale Variability of Raindrop Size Distribution in the Mid-Atlantic Region." Journal of Hydrometeorology 17 (6): 1855-1868 [10.1175/jhm-d-15-0159.1] [Journal Article/Letter]

2016. "Improvement of vertical profiles of raindrop size distribution from micro rain radar using 2D video disdrometer measurements." Atmospheric Research 169 (Part B): 404-415 [10.1016/j.atmosres.2015.07.002] [Journal Article/Letter]

2015. "Global Precipitation Measurement Cold Season Precipitation Experiment (GCPEX): For Measurement’s Sake, Let It Snow." Bulletin of the American Meteorological Society 96 (10): 1719-1741 [10.1175/bams-d-13-00262.1] [Journal Article/Letter]

2015. "Comparison of different fittings of drop spectra for rainfall retrievals." Advances in Water Resources 83 55-67 [10.1016/j.advwatres.2015.05.009] [Journal Article/Letter]

2015. "Identification and Analysis of Collisional Breakup in Natural Rain." Journal of the Atmospheric Sciences 72 (9): 3404-3416 [10.1175/jas-d-14-0304.1] [Journal Article/Letter]

2015. "Reply to “Comments on ‘Describing the Shape of Raindrop Size Distributions Using Uncorrelated Raindrop Mass Spectrum Parameters’”." Journal of Applied Meteorology and Climatology 54 (9): 1977-1982 [10.1175/jamc-d-15-0058.1] [Journal Article/Letter]

2015. "Searching for Large Raindrops: A Global Summary of Two-Dimensional Video Disdrometer Observations." Journal of Applied Meteorology and Climatology 54 (5): 1069-1089 [10.1175/jamc-d-14-0089.1] [Journal Article/Letter]

2015. "A Matérn model of the spatial covariance structure of point rain rates." Stoch Environ Res Risk Assess 29 (2): 411-416 [10.1007/s00477-014-0923-2] [Journal Article/Letter]

2014. "Evaluation of the New Version of the Laser-Optical Disdrometer, OTT Parsivel 2." Journal of Atmospheric and Oceanic Technology 31 (6): 1276-1288 [10.1175/JTECH-D-13-00174.1] [Journal Article/Letter]

2014. "Describing the Shape of Raindrop Size Distributions Using Uncorrelated Raindrop Mass Spectrum Parameters." Journal of Applied Meteorology and Climatology 53 (5): 1282-1296 [10.1175/JAMC-D-13-076.1] [Journal Article/Letter]

2014. "An Experimental Study of Spatial Variability of Rainfall." J. Hydrometeor. 15 (2): 801-812 [10.1175/JHM-D-13-031.1] [Journal Article/Letter]

2013. "Comparison of Raindrop Size Distribution Measurements by Collocated Disdrometers." Journal of Atmospheric and Oceanic Technology 30 (8): 1672-1690 [10.1175/JTECH-D-12-00163.1] [Journal Article/Letter]

2012. "An Experimental Study of the Small-Scale Variability of Rainfall." J. Hydrometeorology 13 (1): 351-365 [10.1175/JHM-D-11-014.1] [Journal Article/Letter]

2011. "Drop size distribution comparisons between Parsivel and 2-D video disdrometers." Adv. Geosci. 30 3-9 [10.5194/adgeo-30-3-2011] [Journal Article/Letter]

2011. "Quality Control and Calibration of the Dual-Polarization Radar at Kwajalein, RMI." Journal of Atmospheric and Oceanic Technology 28 (2): 181-196 [10.1175/2010JTECHA1462.1] [Journal Article/Letter]

2010. "Comparison of Rain Gauge Measurements in the Mid-Atlantic Region." J. Hydrometeor 11 (2): 553-565 [10.1175/2009JHM1137.1] [Journal Article/Letter]

2010. "An Experimental Study of Small-Scale Variability of Raindrop Size Distribution." J Appl Meteor Climat 49 (11): 2348-2365 [10.1175/2010JAMC2269.1] [Journal Article/Letter]

2010. "WRF Simulations of the 20–22 January 2007 Snow Events over Eastern Canada: Comparison with In Situ and Satellite Observations." J Applied Meteor Climatol 49 (11): 2246–2266 [10.1175/2010JAMC2282.1] [Journal Article/Letter]

2009. "Availability of High-Quality TRMM Ground Validation Data from Kwajalein, RMI: A Practical Application of the Relative Calibration Adjustment Technique." J Atmos Ocea Tech 26 (3): 413-429 [10.1175/2008JTECHA1174.1] [Journal Article/Letter]

2009. "A Field Study of Reflectivity and Z–R Relations Using Vertically Pointing Radars and Disdrometers." J Atmos Ocea Tech 26 (6): 1120-1134 [10.1175/2008JTECHA1163.1] [Journal Article/Letter]

2008. "Raindrop Size Distribution Measurements in Tropical Cyclones." Mon. Wea. Rev. 136 (5): 1669-1685 [10.1175/2007MWR2122.1] [Journal Article/Letter]

2008. "Retrieval of Raindrop Size Distribution from Simulated Dual-Frequency Radar Measurements." J. Appl. Meteor. Clim. 47 (1): 223-239 [10.1175/2007JAMC1524.1] [Journal Article/Letter]

2008. "Sensitivity of streamflow simulations to temporal variability and estimation of Z-R relationships." Journal of Hydrologic Engineering 13 (12): 1177-1186 [10.1061/(ASCE)1084-0699(2008)13:12(1177)] [Journal Article/Letter]

2005. "Error characteristics of rainfall measurements by collocated Joss-Waldvogel disdrometers." J Atmos Ocean Tech 22 (5): 513-527 [10.1175/JTECH1734.1] [Journal Article/Letter]

2005. "Ground validation for the Tropical Rainfall Measuring Mission (TRMM)." Journal of Atmospheric and Oceanic Technology 22 (4): 365-380 [10.1175/JTECH1700.1] [Journal Article/Letter]

2005. "Are Z-R power-law relations very likely artifacts due to undersampling?." Q J R Meteor Soc 131 (605): 381-383 [10.1256/qj.03.43A] [Journal Article/Letter]

2005. "Observations and analysis of uncorrelated rain." Journal of Atmospheric Sciences 62 (11): 4071-4083 [Journal Article/Letter]

2004. "Determining reflectivity measurement error from serial measurements using paired disdrometers and profilers." Geophys Res Lett 31 (23): L23107 [10.1029/2004GL020591] [Journal Article/Letter]

2003. "Rain gauge and disdrometer measurements during the Keys Area Microphysics Project (KAMP)." J Atmos Oceanic Tech 20 1460-1477 [Journal Article/Letter]

2002. "Measurements of rainfall with polarimetric X-band radar." J Appl Meteor 41 941-952 [Journal Article/Letter]

2002. "Measurements of drop size distribution in the southwestern Amazon basin." J. Geophys. Res. 107 (D20): 8052 [10.1029/2001JD000355] [Journal Article/Letter]

2002. "Study of the Variability in the Rain Drop Size Distribution over a 2.3 Km Path." Proc IGARSS 2002 3 1857-1859 [Journal Article/Letter]

2001. "Comparison of drop size distribution measurements by impact and optical disdrometers." J Appl Meteor 40 (11): 2083-2097 [10.1175/1520-0450(2001)040<2083:CODSDM>2.0.CO;2] [Journal Article/Letter]

2001. "Estimation of path-average rain drop size distribution using the NASA/TRMM microwave link." Proc IGARSS 2001 3 1038-1040 [Journal Article/Letter]

2000. "Doppler Radar Profilers as Calibration Tools for Scanning Radars." J Appl Meteor 39 (12): 2209-2222 [10.1175/1520-0450(2001)040<2209:DRPACT>2.0.CO;2] [Journal Article/Letter]

2000. "Comparison of simultaneous rain drop size distributions estimated from two surface disdrometers and a UHF profiler." Geophys Res Lett 27 (12): 1763-1766 [10.1029/1999GL011100] [Journal Article/Letter]

2000. "Laboratory and field measurements of raindrop oscillations." Physics and Chemistry of the Earth Part B vol. 25(10-12) [867-870] [Journal Article/Letter]

1999. "Tropical rainfall associated with convective and stratiformclouds: Intercomparison of two independent algorithms." J Appl Meteor 38 302-320 [Journal Article/Letter]

Non-Refereed

2007. "Observational Data Set in Support of Falling Snow." Proc IGARSS 3903 - 3906 [Other]

2002. "Study of the Variability in the Rain Drop Size Distribution over a 23 Km Path." Proc IGARSS 2002 3 1857-1859 [Other]

2001. "On the role of drop size distribution in TRMM rain profiling algorithm." 30th Int Conf on Radar Meteorology [Other]