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OMPS/NPP PCA SO2 Total Column 1-Orbit L2 Swath 50x50km V1 (OMPS_NPP_NMSO2_PCA_L2) at GES DISC

The goal of this dataset is to create and archive a Level 2 Sulfur Dioxide (SO2) Earth Science Data Record (ESDR) from backscatter Ultraviolet (BUV) measurements from the Ozone Mapping and Profiler Suite (OMPS) Nadir Mapper (NM) flown on the NASA/NOAA Suomi National Polar-orbiting Partnership (S-NPP) satellite since 2011. We apply the NASA Goddard Space Flight Center (GSFC) principal component analysis (PCA) satellite trace gas retrieval algorithm, to obtain the best measurement-based ESDR of volcanic and anthropogenic SO2 loadings and emissions, which is fully consistent with our SO2 ESDR (OMSO2) from the Ozone Monitoring Instrument (OMI) flown on the NASA Earth Observing System (EOS) Aura satellite since 2004.  The SO2 ESDR released here at the Goddard Earth Science (GES) Data and Information Data Center (DISC), OMPS_NPP_NMSO2_PCA_L2, is a stand-alone dataset, but will also be part of the NASA's Making Earth System Data Records for Use in Research Environments (MEaSUREs) program. It covers the entire period of the S-NPP/OMPS mission since launch in October 2011, and forward data processing is ongoing. OMPS_NPP_NMSO2_PCA_L2 is a Level 2 orbital swath product, which will be used to study SO2 pollutants emitted from large point sources such as coal-fired power plants and smelters as well as to monitor volcanic SO2 emissions. Sulfur Dioxide (SO2) is a short-lived gas primarily produced by volcanoes, power plants, refineries, metal smelting and burning of fossil fuels. Where SO2 remains near the Earth's surface, it is toxic, causes acid rain, and degrades air quality. Where SO2 is lofted into the free troposphere, it forms aerosols that can alter cloud reflectivity and precipitation. In the stratosphere, volcanic SO2 forms sulfate aerosols that can result in climate change.

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