First observations of SO2 from the satellite Suomi NPP OMPS: Widespread air pollution events over China

Severe smog episodes over China in January 2013 received worldwide attention. This air pollution was distinguished by heavy loadings of fine particulate matter and SO2. To characterize these episodes, we employed the Ozone Mapping and Profiler Suite, Nadir Mapper (OMPS NM), an ultraviolet (UV) spectrometer flying on the Suomi National Polar‐orbiting Partnership (SNPP) spacecraft since October 2011. We developed an advanced algorithm to quantify SO2 in the lower troposphere and achieved high‐quality retrievals from OMPS NM, which are characterized by high precision, ∼0.2 Dobson Units (DU; 1 DU = 2.69×1016molecules/cm2) for instantaneous field of view SO2 data and low biases (within ±0.2 DU). Here we report SO2retrievals and UV aerosol index data for these pollution events. The SO2 columns and the areas covered by high pollutant concentrations are quantified; the results reveal for the first time the full extent (an area of ∼106km2 containing up to 60 kt of SO2) of these episodes.

[1]  N. Krotkov,et al.  SO2 over central China: Measurements, numerical simulations and the tropospheric sulfur budget , 2012 .

[2]  Liangfu Chen,et al.  Satellite observation of regional haze pollution over the North China Plain , 2012 .

[3]  N. Krotkov,et al.  Rapid Transpacific Transport in Autumn Observed by the A-Train Satellites , 2012 .

[4]  Nickolay A. Krotkov,et al.  Estimation of SO2 emissions using OMI retrievals , 2011 .

[5]  Xiong Liu,et al.  Retrievals of sulfur dioxide from the Global Ozone Monitoring Experiment 2 (GOME‐2) using an optimal estimation approach: Algorithm and initial validation , 2011 .

[6]  Xiong Liu,et al.  Direct retrieval of sulfur dioxide amount and altitude from spaceborne hyperspectral UV measurements: Theory and application , 2010 .

[7]  Nickolay A. Krotkov,et al.  Retrieval of vertical columns of sulfur dioxide from SCIAMACHY and OMI: Air mass factor algorithm development, validation, and error analysis , 2009 .

[8]  Arlin J. Krueger,et al.  Improving retrieval of volcanic sulfur dioxide from backscattered UV satellite observations , 2009 .

[9]  John P. Burrows,et al.  SO 2 Retrieval from SCIAMACHY using the Weighting Function DOAS (WFDOAS) technique: comparison with Standard DOAS retrieval , 2008 .

[10]  Brittany McClure,et al.  Validation of SO2 Retrievals from the Ozone Monitoring Instrument over NE China , 2008 .

[11]  Arlin J. Krueger,et al.  Retrieval of large volcanic SO2 columns from the Aura Ozone Monitoring Instrument: Comparison and limitations , 2007 .

[12]  N. Krotkov,et al.  Aircraft observations of dust and pollutants over northeast China: Insight into the meteorological mechanisms of transport , 2007 .

[13]  Arlin J. Krueger,et al.  Sulfur dioxide emissions from Peruvian copper smelters detected by the Ozone Monitoring Instrument , 2007 .

[14]  Heikki Saari,et al.  The ozone monitoring instrument , 2006, IEEE Transactions on Geoscience and Remote Sensing.

[15]  Kai Yang,et al.  Band residual difference algorithm for retrieval of SO/sub 2/ from the aura ozone monitoring instrument (OMI) , 2006, IEEE Transactions on Geoscience and Remote Sensing.

[16]  Peter Thorsheim,et al.  Inventing Pollution: Coal, Smoke, and Culture in Britain since 1800 , 2006 .

[17]  Michael Eisinger,et al.  GOME-2 on MetOp , 2006 .

[18]  Zhanqing Li,et al.  Aircraft Observations of Dust and Pollutants over NE China: Insight into the Meteorological Mechanisms of Long-Range Transport , 2006 .

[19]  Sundar A. Christopher,et al.  Diurnal variability of dust aerosol optical thickness and Angström exponent over dust source regions in China , 2004 .

[20]  Ziauddin Ahmad,et al.  Spectral properties of backscattered UV radiation in cloudy atmospheres , 2004 .

[21]  Kebin He,et al.  URBAN AIR POLLUTION IN CHINA: Current Status, Characteristics, and Progress , 2002 .

[22]  Michael Eisinger,et al.  The Global Ozone Monitoring Experiment (GOME): Mission Concept and First Scientific Results , 1999 .

[23]  M. Buchwitz,et al.  SCIAMACHY: Mission Objectives and Measurement Modes , 1999 .

[24]  J. Burrows,et al.  Tropospheric sulfur dioxide observed by the ERS‐2 GOME instrument , 1998 .

[25]  P. Bhartia,et al.  Rotational Raman scattering (Ring effect) in satellite backscatter ultraviolet measurements. , 1995, Applied optics.

[26]  P. Bhartia,et al.  User's guide for the Total-Ozone Mapping Spectrometer (TOMS) instrument first year ozone T data set , 1982 .

[27]  Arlin J. Krueger,et al.  The Solar Backscatter Ultraviolet and Total Ozone Mapping Spectrometer (SBUV/TOMS) for NIMBUS G , 1975 .

[28]  J. Wallace.  China report. , 1973, Canadian Medical Association journal.

[29]  A. J. Haagen-Smit.  Chemistry and Physiology of Los Angeles Smog , 1952 .