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
More filters
Posted Content
Abrupt declines in tropospheric nitrogen dioxide over China after the outbreak of COVID-19.
Fei Liu,Aaron Page,Sarah A. Strode,Yasuko Yoshida,Sungyeon Choi,Bo Zheng,Lok N. Lamsal,Can Li,Nickolay A. Krotkov,Henk Eskes,Ronald van der A,Pepijn Veefkind,Pieternel F. Levelt,Joanna Joiner,Oliver P. Hauser +14 more
TL;DR: In this article, a 48% drop in tropospheric nitrogen dioxide vertical column densities from the 20 days averaged before the 2020 Lunar New Year to the 20 nights averaged after.
Journal ArticleDOI
Surface erythemal UV irradiance in the continental United States derived from ground-based and OMI observations: quality assessment, trend analysis and sampling issues
Huanxin Zhang,Jun Wang,Lorena Castro García,Jing Zeng,Connor Dennhardt,Yang Liu,Nickolay A. Krotkov +6 more
TL;DR: In this paper, surface full-sky erythemal dose rate (EDR) from the Ozone Monitoring Instrument (OMI) at both satellite overpass time and local noon time is evaluated against ground measurements at 31 sites from the US Department of Agriculture's (USDA) UV-B Monitoring and Research Program (UVMRP) over the period of 2005-2017.
Journal ArticleDOI
High-resolution mapping of SO2 using airborne observations from the GeoTASO instrument during the KORUS-AQ field study: PCA-based vertical column retrievals
Heesung Chong,Seoyoung Lee,Jhoon Kim,Ukkyo Jeong,Ukkyo Jeong,Can Li,Can Li,Nickolay A. Krotkov,Caroline R. Nowlan,Jassim A. Al-Saadi,Scott J. Janz,Matthew G. Kowalewski,Matthew G. Kowalewski,Myoung Hwan Ahn,Mina Kang,Joanna Joiner,David Haffner,Lu Hu,Patricia Castellanos,L. Gregory Huey,Myungje Choi,Chul H. Song,K. M. Han,Ja Ho Koo +23 more
TL;DR: In this paper, the authors presented high-resolution sulfur dioxide (SO2) maps over the Korean Peninsula, produced by SO2 retrievals from GeoTASO measurements during the Korea-United States Air Quality Field Study (KORUS-AQ) from May to June 2016.
UV index climatology over North America from ground-based and satellite estimates
Vitali Fioletov,Michael G. Kimlin,Nickolay A. Krotkov,L. J. Bruce McArthur,James B. Kerr,D. I. Wardle,Jay R. Herman,Richard S. Meltzer,Tom W. Mathews,Jussi Kaurola +9 more
TL;DR: In this article, the long-term monthly mean UV index values for Canada and the United States were calculated using information from two sources: from noon erythemal UV estimated from Total Ozone Mapping Spectrometer (TOMS) total ozone and reflectivity data and from UV index value derived from observations of global solar radiation, total ozone, dew point, and snow cover.
Journal ArticleDOI
Revised and extended benchmark results for Rayleigh scattering of sunlight in spherical atmospheres
Sergey Korkin,Eun-Su Yang,Robert Spurr,Claudia Emde,Nickolay A. Krotkov,Alexander Vasilkov,David Haffner,Jungbin Mok,Alexei Lyapustin +8 more
TL;DR: In this article, the full-spherical RT code MYSTIC (Monte Carlo) and the plane-parallel RT code VLIDORT (discrete ordinates) were corrected for atmospheric sphericity in the single and multiple scattering.