N
Nickolay A. Krotkov
Researcher at Goddard Space Flight Center
Publications - 237
Citations - 13636
Nickolay A. Krotkov is an academic researcher from Goddard Space Flight Center. The author has contributed to research in topics: Ozone Monitoring Instrument & Total Ozone Mapping Spectrometer. The author has an hindex of 63, co-authored 219 publications receiving 11250 citations. Previous affiliations of Nickolay A. Krotkov include University of Baltimore & Raytheon.
Papers
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Validation of SO2 retrievals from the Ozone Monitoring Instrument (OMI) over NE China
Nickolay A. Krotkov,B. McClure,Russell R. Dickerson,Simon Carn,Can Li,P. K. Bhartia,K. Yang,Arlin J. Krueger,Z. Li,Pieternel F. Levelt,Hongbin Chen,Pucai Wang,Daren Lu +12 more
TL;DR: In this paper, the Dutch-Finnish Ozone monitoring instrument (OMI) was used to distinguish between background SO2 conditions and heavy pollution on a daily basis, and the authors presented a first validation of the OMI SO2 data with in situ aircraft measurements in NE China in April 2005.
Journal ArticleDOI
The TROPOMI surface UV algorithm
Anders V. Lindfors,Jukka Kujanpää,Niilo Kalakoski,Anu Heikkilä,Kaisa Lakkala,Tero Mielonen,Maarten Sneep,Nickolay A. Krotkov,Antti Arola,Johanna Tamminen +9 more
TL;DR: In this paper, the TROPOspheric Monitoring Instrument (TROPOMI) is used for calculating the surface UV radiation reaching the Earth's surface, which is the only payload of the Sentinel-5 Precursor (S5P) satellite mission of the European Space Agency (ESA).
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Retrieval of ozone column from global irradiance measurements and comparison with TOMS data. A year of data in the Alps
Dominique Masserot,Jacqueline Lenoble,Colette Brogniez,M. Houet,Nickolay A. Krotkov,Richard D. McPeters +5 more
TL;DR: In this paper, the ozone column amount is retrieved from the ratio of irradiances around 305 and 340 nm, using look up tables based on modeling data, which is consistent with the uncertainty of both methods which is estimated to 5 DU for TOMS, and 5-7 DU for clear sky ground based measurements.
Journal ArticleDOI
A cloud algorithm based on the O 2 -O 2 477 nm absorption band featuring an advanced spectral fitting method and the use of surface geometry-dependent Lambertian-equivalent reflectivity
Alexander Vasilkov,Eun-Su Yang,Sergey Marchenko,Wenhan Qin,Lok N. Lamsal,Joanna Joiner,Nickolay A. Krotkov,David Haffner,Pawan K. Bhartia,Robert Spurr +9 more
TL;DR: In this article, a new cloud algorithm that retrieves an effective cloud pressure, also known as cloud optical centroid pressure (OCP), from oxygen dimer(O2 - O2 ) absorption at 477nm after determining an effective ECF at 466 nm, a wavelength not significantly affected by trace gas absorption and rotational Raman scattering.
Book ChapterDOI
Ultraviolet Satellite Measurements of Volcanic Ash
Simon Carn,Nickolay A. Krotkov +1 more
TL;DR: In this paper, the authors provide a comprehensive review of volcanic ash detection and retrieval techniques and provide examples of volcanic eruptions detected in the ∼37-year data record, using the UVAI.