主讲：Ronald van der A
时间：2019年6月4日（周二）15:00-16:00
地点：物理楼北547
主持/联系：林金泰
摘要：
OMI satellite observations of NO2 and SO2 concentrations have been used to infer NOX and SO2 emissions on a 0.25 x 0.25 degree resolution. These emissions are analyzed for their spatial and temporal variability over China in the last 12 years and these results will be discussed.
Since February 2018 NO2 observations became routinely available from the TROPOMI instrument on the ESA satellite Sentinel 5p. For this a snow-cloud differentiation method has been developed to drastically increase the number of observations over snow surfaces, like Norther China in winter and regions in the Himalaya mountains. To better exploit the high resolution NO2 observations of TROPOMI, we have adapted our inverse algorithm DECSO (Daily Emission estimates Constrained by Satellite Observations) for NOx emissions to perform at a higher spatial resolution of 0.125 x 0.125 degree. The results will be demonstrated for emissions over the Iberian peninsula and over West Siberia. The latter domain showed some unexpected emissions along the Russian gas pipelines.
In addition, a new SO2 inversion algorithm for use with TROPOMI SO2 observations is under development and the first results will be shown.
