Sciences and Exploration Directorate

Robert C Levy


Robert C Levy's Contact Card & Information.
Phone: 301.614.6123
Org Code: 613
Mail Code 613
Greenbelt, MD 20771

Missions & Projects

Brief Bio

Dr. Robert Levy has been a Research Physical Scientist in the Climate and Radiation Laboratory (CRL) since 2013. Dr. Levy is focused on retrieving global aerosol properties from satellite observations, and using the retrieved products for quantifying the role of aerosols in climate and air quality. He is responsible for maintaining the "dark-target" aerosol retrieval for MODIS, and applying it to VIIRS and other sensors (AHI and ABI) to create a long-term global aerosol record and characterize the aerosol diurnal cycle. Dr. Levy’s research has ranged from applications of new algorithm development, monitoring surface air quality, aerosol/cloud interactions and aerosol trends. His publication list and citation metrics can be found at ResearcherID. Currently, he is the Flight Project Scientist for the GOES-R mission.


Current Projects

GOES-R Flight Project Scientist

Remote Sensing

The Geostationary Operational Environmental Satellite (GOES) – R Series is the nation’s most advanced fleet of geostationary weather satellites. The GOES-R Series provide advanced imaging with high spatial resolution and fast coverage to ensure accurate forecasts, real-time mapping of lightning activity, and improved monitoring of solar activity and space weather. The GOES-R Series is a four-satellite program (GOES-R/S/T/U) that will extend the availability of the operational GOES satellite system through 2036. As project scientist, I help to ensure that the flight hardware is meeting all operational and scientific requirements, while also communicating with Goddard's Earth Science Division

Adding high temporal resolution to the global long-term aerosol data record: A synergy of LEO and GEO


What is the diurnal cycle of aerosol optical depth? Here, we are adapting the dark-target (DT) aerosol retrieval to the new generation of imagers in geostationary (GEO) orbit.  So far, these include the Advanced Baseline Imagers (ABI) on GOES-16 and GOES-17, as well as the Advanced Himawari Imager (AHI) on Japan's Himawari-8.  Once we have retrievals from the GEO imagers, we can add them into the long-term global record.  This project is supported by MEaSUREs-2017 (Making Earth Science data Records for Use in Research Environments). 

Maintenance of the MODIS Dark-Target Aerosol Retrieval Algorithm and Products


This "Senior Review" funded project is to maintain MODIS dark-target aerosol products from both Terra and Aqua platforms. Primary tasks include continued validation and evaluation of the product, assisting users, and fixing problems if needed.

Can Citizen Science and Low-Cost Sensors Help Improve Earth System Data: Implications to Current and Next Generation of Space-Based Air Quality

Atmospheric Measurement

I am Co-I on this NASA-funded (CSESP = Citizen Science for Earth Systems) project to bring low-cost citizen science into the air quality research community. The goals of this project include A) introduce citizen scientists to the science of aerosol monitoring, B) create and deploy low-cost air quality sensors in three networks around the world, C) connect the ground-based datasets with satellite retrievals. D) provide training and feedback to the citizen scientists. 


2007: Ph.D, Dept. of Atmospheric and Ocean Sciencies, University of Maryland-College Park, College Park, Maryland USA

1996: M.S., Dept. of Atmospheric Science, Colorado State University, Fort Collins, Colorado, USA

1994: B.A., Dept. of Mathematics, Oberlin College, Oberlin, Ohio USA

Professional Societies

American Geophysical Union

1998 - Present

American Meteorological Society

1996 - Present

Professional Service

  • Mentor for summer Graduate and/or Undergraduate Research (OSSI): (2011-2020 most years)
  • Mentor for spring NASA-DEVELOP program (2016)
  • Served on PhD committees and/or qualifying exams (2008, 2010, 2015, 2018, 2021)
  • Associated Editor for JGR-Atmospheres (2012-present)
  • Review panels for various NASA, DOE, Israel Space Agency, etc
  • Convened sessions at Asia Oceania Geophysical Society (AOGS) meetings (2017, 2018, 2019, 2020*)
  • Participated in Science Director's Committee for Code 600 (2017-2019)
  • Organizer for Climate and Radiation Laboratory (Code 613) Seminar series (2015-2016)
  • Reviewer for AGU's Dewan Student Scholarship Awards (2015, 2016, 2017)
  • Convened sessions at AGU Fall meetings (2012-2014, 2016)
  • GSFC AeroCenter committee (2009-2011 - including chair in 2011)



6/2023: Excellence in DEIA Award, NASA-GSFC Sciences and Exploration Directorate

6/2021: Robert H. Goddard Award - Science (2020)

10/2020: Mentoring award - NASA-GSFC Earth Science Division - Atmospheres

10/2019: William T. Pecora - Group Award for "Terra Science and Flight Team", US Geological Survey (

11/2018: Best Science Highlight for Highlight from 6/2018 (Exploring systematic offsets between aerosol products from the two MODIS sensors). 

8/2012: Young Scientist Award from the International Radiation Commission.

1/2011: Best First Authored Paper Award, NASA-GSFC Climate and Radiation Branch

1/2009: Outstanding Scientific Leadership Award, NASA-GSFC Climate and Radiation Branch

2006: Outstanding Performance Award, NASA-GSFC Laboratory for Atmospheres

2005: Outstanding Teamwork Award, NASA-GSFC

7/2002: NCAR's Advanced Study Program, Colloquium on "Aerosols, Climate and the Hydrological Cycle"

12/2002: Outstanding Scientific Support Award, NASA-GSFC Climate and Radiation Branch




2024. "Mineral dust optical properties for remote sensing and global modeling: A review." Remote Sensing of Environment 303 113982 [10.1016/j.rse.2023.113982] [Journal Article/Letter]

2024. "Investigating the Spatial and Temporal Limitations for Remote Sensing of Wildfire Smoke Using Satellite and Airborne Imagers During FIREX‐AQ." Journal of Geophysical Research: Atmospheres 129 (2): [10.1029/2023jd039085] [Journal Article/Letter]

2023. "Calibration of the SNPP and NOAA 20 VIIRS sensors for continuity of the MODIS climate data records." Remote Sensing of Environment 295 113717 [10.1016/j.rse.2023.113717] [Journal Article/Letter]

2023. "Assessment of the impact of discontinuity in satellite instruments and retrievals on global PM2.5 estimates." Remote Sensing of Environment 294 113624 [10.1016/j.rse.2023.113624] [Journal Article/Letter]

2023. "Assessment of severe aerosol events from NASA MODIS and VIIRS aerosol products for data assimilation and climate continuity." Atmospheric Measurement Techniques 16 (10): 2547-2573 [10.5194/amt-16-2547-2023] [Journal Article/Letter]

2023. "Reducing Aerosol Forcing Uncertainty By Combining Models with Satellite and Within‐the‐Atmosphere Observations: A Three‐Way Street." Reviews of Geophysics [10.1029/2022rg000796] [Journal Article/Letter]

2022. "A Coupled Evaluation of Operational MODIS and Model Aerosol Products for Maritime Environments Using Sun Photometry: Evaluation of the Fine and Coarse Mode." Remote Sensing 14 (13): 2978 [10.3390/rs14132978] [Journal Article/Letter]

2022. "Augmenting Heritage Ocean-Color Aerosol Models for Enhanced Remote Sensing of Inland and Nearshore Coastal Waters." Frontiers in Remote Sensing 3 [10.3389/frsen.2022.860816] [Journal Article/Letter]

2022. "New seasonal pattern of pollution emerges from changing North American wildfires ." Nature Communications 13 2043 [10.1038/s41467-022-29623-8] [Journal Article/Letter]

2021. "Improving Surface PM2.5 Forecasts in the United States Using an Ensemble of Chemical Transport Model Outputs: 2. Bias Correction With Satellite Data for Rural Areas." Journal of Geophysical Research: Atmospheres 127 (1): [10.1029/2021jd035563] [Journal Article/Letter]

2021. "Monthly Global Estimates of Fine Particulate Matter and Their Uncertainty." Environmental Science & Technology [10.1021/acs.est.1c05309] [Journal Article/Letter]

2021. "Constraining aerosol phase function using dual‐view geostationary satellites." Journal of Geophysical Research: Atmospheres 126 [10.1029/2021jd035209] [Journal Article/Letter]

2021. "Observation and modeling of the historic “Godzilla” African dust intrusion into the Caribbean Basin and the southern US in June 2020." Atmospheric Chemistry and Physics 21 (16): 12359-12383 [10.5194/acp-21-12359-2021] [Journal Article/Letter]

2021. "Air pollution scenario over Pakistan: Characterization and ranking of extremely polluted cities using long-term concentrations of aerosols and trace gases." Remote Sensing of Environment 264 112617 [10.1016/j.rse.2021.112617] [Journal Article/Letter]

2021. "Aerosol properties in cloudy environments from remote sensing observations: a review of the current state of knowledge." Bulletin of the American Meteorological Society 1-57 [10.1175/bams-d-20-0225.1] [Journal Article/Letter]

2021. "Effects of COVID-19 lockdowns on fine particulate matter concentrations." Science Advances 7 (26): eabg7670 [10.1126/sciadv.abg7670] [Journal Article/Letter]

2021. "A Dark Target research aerosol algorithm for MODIS observations over eastern China: increasing coverage while maintaining accuracy at high aerosol loading." Atmospheric Measurement Techniques 14 (5): 3449-3468 [10.5194/amt-14-3449-2021] [Journal Article/Letter]

2021. "Analysis of simultaneous aerosol and ocean glint retrieval using multi-angle observations." Atmospheric Measurement Techniques 14 3233-3252 [10.5194/amt-14-3233-2021] [Journal Article/Letter]

2021. "Air pollution trends measured from Terra: CO and AOD over industrial, fire-prone, and background regions." Remote Sensing of Environment 256 112275 [10.1016/j.rse.2020.112275] [Journal Article/Letter]

2021. "Tracking Smoke from a Prescribed Fire and its Impacts on Local Air Quality using Temporally Resolved GOES-16 ABI Aerosol Optical Depth (AOD)." Journal of Atmospheric and Oceanic Technology [10.1175/jtech-d-20-0162.1] [Journal Article/Letter]

2020. "An AeroCom–AeroSat study: intercomparison of satellite AOD datasets for aerosol model evaluation." Atmospheric Chemistry and Physics 20 (21): 12431-12457 [10.5194/acp-20-12431-2020] [Journal Article/Letter]

2020. "Dust Aerosol Retrieval Over the Oceans With the MODIS/VIIRS Dark‐Target Algorithm: 1. Dust Detection." Earth and Space Science 7 (10): [10.1029/2020ea001221] [Journal Article/Letter]

2020. "Dust Aerosol Retrieval Over the Oceans With the MODIS/VIIRS Dark Target Algorithm: 2. Nonspherical Dust Model." Earth and Space Science 7 (10): [10.1029/2020ea001222] [Journal Article/Letter]

2020. "The Dark Target Algorithm for Observing the Global Aerosol System: Past, Present, and Future." Remote Sensing 12 (18): 2900 [10.3390/rs12182900] [Journal Article/Letter]

2020. "High-Resolution Gridded Level 3 Aerosol Optical Depth Data from MODIS." Remote Sensing 12 (17): 2847 [10.3390/rs12172847] [Journal Article/Letter]

2020. "Global Estimates and Long-Term Trends of Fine Particulate Matter Concentrations (1998–2018)." Environmental Science & Technology 54 (13): 7879-7890 [10.1021/acs.est.0c01764] [Journal Article/Letter]

2020. "Merging regional and global aerosol optical depth records from major available satellite products." Atmospheric Chemistry and Physics 20 (4): 2031-2056 [10.5194/acp-20-2031-2020] [Journal Article/Letter]

2020. "Continuing the MODIS Dark Target Aerosol Time Series with VIIRS." Remote Sensing 12 (2): 308 [10.3390/rs12020308] [Journal Article/Letter]

2020. "Interannual variability and trends of combustion aerosol and dust in major continental outflows revealed by MODIS retrievals and CAM5 simulations during 2003–2017." Atmospheric Chemistry and Physics 20 139-161 [10.5194/acp-20-139-2020] [Journal Article/Letter]

2019. "Retrieval of aerosols over Asia from the Advanced Himawari Imager: Expansion oftemporal coverage of the global Dark Target aerosol product." Atmospheric Measurement Techniques 12 6557–6577 [10.5194/amt-12-6557-2019] [Journal Article/Letter]

2019. "A spatial‐temporal extreme precipitation database from GPM IMERG." Journal of Geophysical Research: Atmospheres 2019JD030449 [10.1029/2019jd030449] [Journal Article/Letter]

2019. "Estimates of African Dust Deposition Along the Trans‐Atlantic Transit Using the Decadelong Record of Aerosol Measurements from CALIOP, MODIS, MISR, and IASI." Journal of Geophysical Research: Atmospheres 124 (14): 7975-7996 [10.1029/2019jd030574] [Journal Article/Letter]

2019. "Retrieving Aerosol Characteristics From the PACE Mission, Part 2: Multi-Angle and Polarimetry." Frontiers in Environmental Science 7 [10.3389/fenvs.2019.00094] [Journal Article/Letter]

2019. "Retrieving Aerosol Characteristics From the PACE Mission, Part 1: Ocean Color Instrument." Frontiers in Earth Science 7 [10.3389/feart.2019.00152] [Journal Article/Letter]

2019. "Retrievals of aerosol size distribution, spherical fraction and complex refractive index from airborne in situ angular light scattering and absorption measurements." Journal of Geophysical Research: Atmospheres 124 (14): 7997-8024 [] [Journal Article/Letter]

2019. "AERONET Remotely Sensed Measurements and Retrievals of Biomass Burning Aerosol Optical Properties During the 2015 Indonesian Burning Season." Journal of Geophysical Research: Atmospheres 124 (8): 4722-4740 [10.1029/2018jd030182] [Journal Article/Letter]

2019. "Exploring aerosols near clouds with high-spatial-resolution aircraft remote sensing during SEAC4RS." Journal of Geophysical Research: Atmospheres [10.1029/2018jd028989] [Journal Article/Letter]

2019. "Characterizing the 2015 Indonesia fire event using modified MODIS aerosol retrievals." Atmospheric Chemistry and Physics 19 (1): 259-274 [10.5194/acp-19-259-2019] [Journal Article/Letter]

2018. "Exploring systematic offsets between aerosol products from the two MODIS sensors." Atmospheric Measurement Techniques 11 4073-4092 [] [Journal Article/Letter]

2018. "Impact of California Fires on Local and Regional Air Quality: The Role of a Low-Cost Sensor Network and Satellite Observations." GeoHealth [10.1029/2018gh000136] [Journal Article/Letter]

2018. "Correcting for trace gas absorption when retrieving aerosol optical depth from satellite observations of reflected shortwave radiation." Atmospheric Measurement Techniques 11 3205-3219 [] [Journal Article/Letter]

2018. "Validation of MODIS 3 km land aerosol optical depth from NASA's EOS Terra and Aqua missions." Atmospheric Measurement Techniques 11 (5): 3145-3159 [10.5194/amt-11-3145-2018] [Journal Article/Letter]

2018. "Observations of the Interaction and Transport of Fine Mode Aerosols with Cloud and/or Fog in Northeast Asia from Aerosol Robotic Network (AERONET) and Satellite Remote Sensing." Journal of Geophysical Research: Atmospheres [10.1029/2018JD028313] [Journal Article/Letter]

2018. "Bayesian aerosol retrieval algorithm for MODIS AOD retrieval over land." Atmospheric Measurement Techniques 11 (3): 1529-1547 [10.5194/amt-11-1529-2018] [Journal Article/Letter]

2017. "Developing and diagnosing climate change indicators of regional aerosol optical properties." Scientific Reports 7 (1): 18093 [10.1038/s41598-017-18402-x] [Journal Article/Letter]

2017. "Retrieval of aerosol optical properties using MERIS observations: Algorithm and some first results." Remote Sensing of Environment 197 125-140 [10.1016/j.rse.2016.11.015] [Journal Article/Letter]

2017. "MODIS Retrieval of Aerosol Optical Depth over Turbid Coastal Water." Remote Sensing 9 (6): 595 [10.3390/rs9060595] [Journal Article/Letter]

2017. "Evaluation of Aerosol Optical Depth and Aerosol Models from VIIRS Retrieval Algorithms over North China Plain." Remote Sensing 9 (5): 432 [10.3390/rs9050432] [Journal Article/Letter]

2016. "An Evaluation of MODIS-Retrieved Aerosol Optical Depth over a Mountainous AERONET Site in the Southeastern US." Aerosol Air Qual. Res. 16 (12): 3243-3255 [10.4209/aaqr.2015.09.0568] [Journal Article/Letter]

2016. "Testing the Two-Layer Model for Correcting Near Cloud Reflectance Enhancement Using LES/SHDOM Simulated Radiances ." J. Geophys. Res., Atmos. (121): 9661–9674 [10.1002/2016JD025021] [Journal Article/Letter]

2016. "Development of an operational land water mask for MODIS Collection 6, and influence on downstream data products." International Journal of Digital Earth 10 (2): 207-218 [10.1080/17538947.2016.1232756] [Journal Article/Letter]

2016. "Indonesian fire activity and smoke pollution in 2015 show persistent nonlinear sensitivity to El Niño-induced drought." Proc Natl Acad Sci USA 113 (33): 9204-9209 [10.1073/pnas.1524888113] [Journal Article/Letter]

2016. "A surface reflectance scheme for retrieving aerosol optical depth over urban surfaces in MODIS Dark Target retrieval algorithm." Atmospheric Measurement Techniques 9 (7): 3293-3308 [10.5194/amt-9-3293-2016] [Journal Article/Letter]

2016. "Multi-sensor cloud and aerosol retrieval simulator and remote sensing from model parameters – Part 2: Aerosols." Geosci. Model Dev. 9 (7): 2377-2389 [10.5194/gmd-9-2377-2016] [Journal Article/Letter]

2016. "Global Estimates of Fine Particulate Matter using a Combined Geophysical-Statistical Method with Information from Satellites, Models, and Monitors." Environ. Sci. Technol. 50 (7): 3762-3772 [10.1021/acs.est.5b05833] [Journal Article/Letter]

2016. "Evaluation of VIIRS, GOCI, and MODIS Collection 6 AOD retrievals against ground sunphotometer observations over East Asia." Atmos. Chem. Phys. 16 (3): 1255-1269 [10.5194/acp-16-1255-2016] [Journal Article/Letter]

2016. "Satellite-Based Spatiotemporal Trends in PM2.5 Concentrations: China, 2004–2013." Environmental Health Perspectives 124 (2): 184-192 [10.1289/ehp.1409481] [Journal Article/Letter]

2016. "New statistical model for variability of aerosol optical thickness: Theory and application to MODIS data over ocean." Journal of the Atmospheric Sciences 73 (2): 821-837 [10.1175/jas-d-15-0130.1] [Journal Article/Letter]

2015. "Adaption of the MODIS aerosol retrieval algorithm using airborne spectral surface reflectance measurements over urban areas: a case study." Atmospheric Measurement Techniques 8 (12): 5237-5249 [10.5194/amt-8-5237-2015] [Journal Article/Letter]

2015. "An assessment of the quality of aerosol retrievals over the Red Sea and evaluation of the climatological cloud-free dust direct radiative effect in the region." J. Geophys. Res.-Atmos 120 (20): 10,862–10,878 [10.1002/2015JD023282] [Journal Article/Letter]

2015. "Towards a long-term global aerosol optical depth record: Applying a consistent aerosol retrieval algorithm to MODIS and VIIRS observed reflectance." Atmos. Meas. Tech 8 4083-4110 [10.5194/amt-8-4083-2015] [Journal Article/Letter]

2015. "Spatiotemporal coherence of mean and extreme aerosol particle events over eastern North America as observed from satellite." Atmospheric Environment 112 126-135 [10.1016/j.atmosenv.2015.04.026] [Journal Article/Letter]

2014. "MODIS Collection 6 aerosol products: Comparison between Aqua's e-Deep Blue, Dark Target, and “merged” data sets, and usage recommendations." J. Geophys. Res.-Atmos 119 (24): 13,965-13,989 [10.1002.2014JD022453] [Journal Article/Letter]

2014. "Impact of satellite viewing-swath width on global and regional aerosol optical thickness statistics and trends." Atmospheric Measurement Techniques 7 (7): 2313-2335 [10.5194/amt-7-2313-2014] [Journal Article/Letter]

2014. "Scientific impact of MODIS C5 calibration degradation and C6+ improvements." Atmos. Meas. Tech. 7 4353-4365 [10.5194/amt-7-4353-2014] [Journal Article/Letter]

2014. "Comparison of MODIS 3 km and 10 km resolution aerosol optical depth retrievals over land with airborne sunphotometer measurements during ARCTAS summer 2008." Atmos. Chem. Phys. 14 (4): 2015-2038 [10.5194/acp-14-2015-2014] [Journal Article/Letter]

2014. "Multi-decadal aerosol variations from 1980 to 2009: a perspective from observations and a global model." Atmos. Chem. Phys. 14 (7): 3657-3690 [10.5194/acp-14-3657-2014] [Journal Article/Letter]

2014. "Current and Future Perspectives of Aerosol Research at NASA Goddard Space Flight Center." Bulletin of the American Meteorological Society early view [10.1175/ BAMS-D-13-00153.1] [Journal Article/Letter]

2013. "Correction of MODIS aerosol retrieval for 3D radiative effects in broken cloud fields." AIP Conference Proceedings 1531 (1): [10.1063/1.4804761] [Proceedings]

2013. "Optimal estimation for global ground-level fine particulate matter concentrations." J. Geophys. Res. Atmos. 118 (11): 5621–5636 [10.1002/jgrd.50479] [Journal Article/Letter]

2013. "Remote sensing of surface visibility from space: A look at the United States East Coast." Atmospheric Environment 81 136–147 [10.1016/j.atmosenv.2013.08.050] [Journal Article/Letter]

2013. "Improvement of MODIS aerosol retrievals near clouds." J. Geophys. Res. Atmos. 118 (16): 9168-9181 [10.1002/jgrd.50617] [Journal Article/Letter]

2013. "Global bias adjustment for MODIS aerosol optical thickness using neural network." Journal of Applied Remote Sensing 7 (1): 073514 [10.1117/1.JRS.7.073514] [Journal Article/Letter]

2013. "Classification of dust days by satellite remotely sensed aerosol products." Int J Rem Sens 34 (8): 2672-2688 [Full Text] [10.1080/01431161.2012.748991] [Journal Article/Letter]

2013. "MODIS 3 km aerosol product: algorithm and global perspective." Atmospheric Measurement Techniques 6 (7): 1829-1844 [10.5194/amt-6-1829-2013] [Journal Article/Letter]

2013. "MODIS 3 km aerosol product: applications over land in an urban/suburban region." Atmospheric Measurement Techniques 6 (7): 1747-1759 [10.5194/amt-6-1747-2013] [Journal Article/Letter]

2013. "The Collection 6 MODIS Aerosol Products over Land and Ocean." Atmos Meas Tech 6 2989-3034 [10.5194/amt-6-2989-2013] [Journal Article/Letter]

2012. "Atmospheric Chemistry over Southern Africa: Changing Chemistry in a Changing Climate: Human and Natural Impacts over the Southern Africa Region (C4-SAR)." EOS Trans 93 (10): 110 [10.1029/2012EO100008] [Journal Article/Letter]

2012. "Implications of satellite swath width on global aerosol optical thickness statistics." Atmos. Meas. Tech. Discuss. 5 (2): 2795-2820 [10.5194/amtd-5-2795-2012] [Journal Article/Letter]

2012. "Impact of sensor degradation on the MODIS NDVI time series." Remote Sensing of Environment 119 55-61 [10.1016/j.rse.2011.12.001] [Journal Article/Letter]

2012. "Evaluation and Wind Speed Dependence of MODIS Aerosol Retrievals Over Open Ocean." IEEE Trans. Geosci. Remote Sensing 50 (2): 429-435 [10.1109/TGRS.2011.2162073] [Journal Article/Letter]

2012. "Retrieving aerosol in a cloudy environment: aerosol product availability as a function of spatial resolution." Atmospheric Measurement Techniques 5 (7): 1823-1840 [10.5194/amt-5-1823-2012] [Journal Article/Letter]

2012. "Aerosol daytime variations over North and South America derived from multiyear AERONET measurements." J. Geophys. Res. 117 (D5): D05211 [10.1029/2011JD017242] [Journal Article/Letter]

2011. "Evaluating the assumptions of surface reflectance and aerosol type selection within the MODIS aerosol retrieval over land: the problem of dust type selection." Atmospheric Measurement Techniques 4 (2): 201-214 [10.5194/amt-4-201-2011] [Journal Article/Letter]

2011. "NASA A-Train and Terra observations of the 2010 Russian wildfires." Atmos. Chem. Phys. 11 (17): 9287-9301 [10.5194/acp-11-9287-2011] [Journal Article/Letter]

2011. "Satellite-based estimates of ground-level fine particulate matter during extreme events: A case study of the Moscow fires in 2010." Atmospheric Environment 45 (34): 6225-6232 [10.1016/j.atmosenv.2011.07.068] [Journal Article/Letter]

2011. "Glacial flour dust storms in the Gulf of Alaska: Hydrologic and meteorological controls and their importance as a source of bioavailable iron." Geophysical Research Letters 38 (6): L06602 [10.1029/2010GL046573] [Journal Article/Letter]

2011. "Multiangle implementation of atmospheric correction (MAIAC): 2. Aerosol algorithm." J. Geophys. Res. 116 (D3): D03211 [10.1029/2010JD014986] [Journal Article/Letter]

2011. "Response to “Toward unified satellite climatology of aerosol properties. 3. MODIS versus MISR versus AERONET”." Journal of Quantitative Spectroscopy and Radiative Transfer 112 (5): 901-909 [10.1016/j.jqsrt.2010.11.001] [Journal Article/Letter]

2010. "The inter-comparison of major satellite aerosol retrieval algorithms using simulated intensity and polarization characteristics of reflected light." Atmospheric Measurement Techniques 3 (4): 909-932 [10.5194/amt-3-909-2010] [Journal Article/Letter]

2010. "Improved retrieval of aerosol size-resolved properties from moderate resolution imaging spectroradiometer over India: Role of aerosol model and surface reflectance." Journal of Geophysical Research-Atmosphere 115 (D18213): [10.1029/2009JD013218] [Journal Article/Letter]

2010. "Global Estimates of Ambient Fine Particulate Matter Concentrations from Satellite-Based Aerosol Optical Depth: Development and Application." Environ Health Perspectives 118 (6): 847-855 [10.1289/ehp.0901623] [Journal Article/Letter]

2010. "Global evaluation of the Collection 5 MODIS dark-target aerosol products over land." Atmos. Chem. Phys. 10 (21): 10399-10420 [10.5194/acp-10-10399-2010] [Journal Article/Letter]

2009. "A Critical Look at Deriving Monthly Aerosol Optical Depth From Satellite Data." IEEE Trans. Geosci. Remote Sensing 47 (8): 2942-2956 [10.1109/TGRS.2009.2013842] [Journal Article/Letter]

2009. "Testing aerosol properties in MODIS Collection 4 and 5 using airborne sunphotometer observations in INTEX-B/MILAGRO." Atmos. Chem. Phys. 9 (21): 8159-8172 [Full Text] [10.5194/acp-9-8159-2009] [Journal Article/Letter]

2009. "MISR Aerosol Product Attributes and Statistical Comparisons With MODIS." IEEE Trans. Geosci. Remote Sensing 47 (12): 4095-4114 [10.1109/TGRS.2009.2023115] [Journal Article/Letter]

2009. "Temporal trend in anthropogenic sulfur aerosol transport from central and eastern Europe to Israel." J. Geophys. Res. 114 D00D19 [10.1029/2009JD011870] [Journal Article/Letter]

2008. "Global aerosol climatology from the MODIS satellite sensors." J. Geophys. Res. 113 (D14): D14S07 [10.1029/2007JD009661] [Journal Article/Letter]

2008. "Radiative transfer codes for atmospheric correction and aerosol retrieval: intercomparison study." Applied Optics 47 (13): 2215 [10.1364/AO.47.002215] [Journal Article/Letter]

2007. "Evaluation of the Moderate Resolution Imaging Spectroradiometer aerosol products at two Aerosol Robotic Network stations in China." J Geophys Res 112 (D22S08): 14 pp [10.1029/2007JD008474] [Journal Article/Letter]

2007. "Second-generation operational algorithm: Retrieval of aerosol properties over land from inversion of Moderate Resolution Imaging Spectroradiometer spectral reflectance." J Geophys Res 112 (D13211): 21 pp [10.1029/2006JD007815] [Journal Article/Letter]

2007. "Global aerosol optical properties and application to Moderate Resolution Imaging Spectroradiometer aerosol retrieval over land." J. Geophys. Res. 112 (D13): [10.1029/2006jd007815] [Journal Article/Letter]

2007. "Remote Sensing of Spectral Aerosol Properties: A Classroom Experience." Bulletin of the American Meteorological Society 88 (1): 25-30 [10.1175/bams-88-1-25] [Journal Article/Letter]

2007. "Satellite-derived aerosol optical depth over dark water from MISR and MODIS: Comparisons with AERONET and implications for climatological studies." J. Geophys. Res. 112 (D18): D11205 [10.1029/2006JD008175] [Journal Article/Letter]

2005. "Suborbital Measurements of Spectral Aerosol Optical Depth and Its Variability at Subsatellite Grid Scales in Support of CLAMS 2001." J. Atmos. Sci. 62 (4): 993-1007 [10.1175/JAS3387.1] [Journal Article/Letter]

2005. "Evaluation of the MODIS aerosol retrievals over ocean and land during CLAMS." J Atmos Sci 62 974-992 [10.1175/JAS3391.1] [Journal Article/Letter]

2005. "The MODIS aerosol algorithm, products, and validation." J Atmos Sci 62 (4): 947-973 [10.1175/JAS3385.1] [Journal Article/Letter]

2005. "Smoke over haze: Comparative analysis of satellite, surface radiometer, and airborne in situ measurements of aerosol optical properties and radiative forcing over the eastern United States." Journal of Geophysical Research 110 (D10): D10S21 [10.1029/2004jd004518] [Journal Article/Letter]

2005. "A critical examination of the residual cloud contamination and diurnal sampling effects on MODIS estimates of aerosol over ocean." IEEE Trans Geosci Remote Sens 43 (12): 2886-2897 [10.1109/TGRS.2005.858430] [Journal Article/Letter]

2004. "Aerosol distribution in the Northern Hemisphere during ACE-Asia: Results from global model, satellite observations, and Sun photometer measurements." J. Geophys. Res. 109 (D23): [10.1029/2004jd004829] [Journal Article/Letter]

2004. "Effects of neglecting polarization on the MODIS aerosol retrieval over land." IEEE Trans on Geoscience & Rem Sens 42 (11): 2576-2583 [10.1109/TGRS.2004.837336] [Journal Article/Letter]

2004. "Global aerosol remote sensing from MODIS." Advances in Space Research 34 (4): 820-827 [10.1016/j.asr.2003.07.071] [Journal Article/Letter]

2003. "Evaluation of the Moderate-Resolution Imaging Spectroradiometer (MODIS) retrievals of dust aerosol over the ocean during PRIDE." Journal of Geophysical Research 108 (D19): 8594 [10.1029/2002jd002460] [Journal Article/Letter]

2003. "MODIS observation of aerosols and estimation of aerosol radiative forcing over southern Africa during SAFARI 2000." Journal of Geophysical Research-Atmos. 108 (D13): 8499 [10.1029/2002jd002366] [Journal Article/Letter]

2003. "Airborne Sun photometer measurements of aerosol optical depth and columnar water vapor during the Puerto Rico Dust Experiment and comparison with land, aircraft, and satellite measurements." J Geophys Res 108 (D19): 8588 [10.1029/2002JD002520] [Journal Article/Letter]

2003. "Saharan dust transport to the Caribbean during PRIDE: 2. Transport, vertical profiles, and deposition in simulations of in situ and remote sensing observations." J. Geophys. Res. 108 (D19): 8590 [10.1029/2002JD002659] [Journal Article/Letter]

2002. "Analysis of the performance characteristics of the five-channel Microtops II Sun photometer for measuring aerosol optical thickness and precipitable water vapor." Journal of Geophysical Research 107 (D13): 4179 [10.1029/2001jd001302] [Journal Article/Letter]

2002. "MODIS Cloud screening for remote sensing of aerosols over oceans using spatial variability." Geophysical Research Letters 29 (12): 8009 [10.1029/2001gl013252] [Journal Article/Letter]

2002. "Validation of MODIS aerosol retrieval over ocean." Geophys Res Lett 29 (12): [10.1029/2001GL013204] [Journal Article/Letter]


2022. "Characterizing Aerosol from Space with the MODerate-resolution Imaging Spectroradiometer (MODIS) on the Terra and Aqua Satellites." Handbook of Air Quality and Climate Change 1-24 [10.1007/978-981-15-2527-8_60-1] [Article in Book]

2015. "MODIS Terra-Aqua C6+ Cross-Calibration Improvements ." GSICS Quarterly 9 (2): [10.7289/V5XK8CHN] [Newsletter]

2013. "Growing up MODIS: Towards a mature aerosol climate data record." AIP Conference Proceedings 1531 (1): 31-34 [10.1063/1.4804700] [Proceedings]