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DOI | 10.1029/2020JD033475 |
Validation of IASI Satellite Ammonia Observations at the Pixel Scale Using In Situ Vertical Profiles | |
Guo X.; Wang R.; Pan D.; Zondlo M.A.; Clarisse L.; Van Damme M.; Whitburn S.; Coheur P.-F.; Clerbaux C.; Franco B.; Golston L.M.; Wendt L.; Sun K.; Tao L.; Miller D.; Mikoviny T.; Müller M.; Wisthaler A.; Tevlin A.G.; Murphy J.G.; Nowak J.B.; Roscioli J.R.; Volkamer R.; Kille N.; Neuman J.A.; Eilerman S.J.; Crawford J.H.; Yacovitch T.I.; Barrick J.D.; Scarino A.J. | |
发表日期 | 2021 |
ISSN | 2169897X |
卷号 | 126期号:9 |
英文摘要 | Satellite ammonia (NH3) observations provide unprecedented insights into NH3 emissions, spatiotemporal variabilities and trends, but validation with in situ measurements remains lacking. Here, total columns from the Infrared Atmospheric Sounding Interferometer (IASI) were intercompared to boundary layer NH3 profiles derived from aircraft- and surface-based measurements primarily in Colorado, USA, in the summer of 2014. IASI-NH3 version 3 near real-time data set compared well to in situ derived columns (windows ±15 km around centroid, ±1 h around overpass time) with a correlation of 0.58, a slope of 0.78 ± 0.14 and an intercept of 2.1 × 1015±1.5 × 1015 molecules cm−2. Agreement degrades at larger spatiotemporal windows, consistent with the short atmospheric lifetime of NH3. We also examined IASI version 3R data, which relies on temperature retrievals from the ERA Reanalysis, and a third product generated using aircraft-measured temperature profiles. The overall agreement improves slightly for both cases, and neither is biased within their combined measurement errors. Thus, spatiotemporal averaging of IASI over large windows can be used to reduce retrieval noise. Nonetheless, sampling artifacts of airborne NH3 instruments result in significant uncertainties of the in situ-derived columns. For example, large validation differences exist between ascent and descent profiles, and the assumptions of the free tropospheric NH3 profiles used above the aircraft ceiling significantly impact the validation. Because short-lived species like NH3 largely reside within the boundary layer with complex vertical structures, more comprehensive validation is needed across a wide range of environments. More accurate and widespread in situ NH3 data sets are therefore required for improved validations of satellite products. © 2021. The Authors. |
英文关键词 | ammonia; IASI; remote sensing; satellite; validation; vertical profile |
语种 | 英语 |
来源期刊 | Journal of Geophysical Research: Atmospheres |
文献类型 | 期刊论文 |
条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/185267 |
作者单位 | Department of Civil and Environmental Engineering, Princeton University, Princeton, NJ, United States; Université Libre de Bruxelles (ULB), Spectroscopy, Quantum Chemistry and Atmospheric Remote Sensing (SQUARES), Brussels, Belgium; LATMOS/IPSL, Sorbonne Université, UVSQ, CNRS, Paris, France; Atmospheric Science Branch, NASA Ames Research Center, Moffett Field, CA, United States; Hunterdon Central Regional High School, Flemington, NJ, United States; Department of Civil, Structural and Environmental Engineering, University at Buffalo, Buffalo, NY, United States; Princeton Institute for the Science and Technology of Materials, Princeton, NJ, United States; Sonoma Technology, Inc., Washington, DC, United States; Chemistry and Dynamics Branch, Science Directorate, NASA Langley Research Center, Hampton, VA, United States; Oak Ridge Associated Universities, Oak Ridge, TN, United States; Department of Chemistry, University of Oslo, Oslo, Norway; Institute for Ion Physics and Applied Physics, University of Innsbr... |
推荐引用方式 GB/T 7714 | Guo X.,Wang R.,Pan D.,et al. Validation of IASI Satellite Ammonia Observations at the Pixel Scale Using In Situ Vertical Profiles[J],2021,126(9). |
APA | Guo X..,Wang R..,Pan D..,Zondlo M.A..,Clarisse L..,...&Scarino A.J..(2021).Validation of IASI Satellite Ammonia Observations at the Pixel Scale Using In Situ Vertical Profiles.Journal of Geophysical Research: Atmospheres,126(9). |
MLA | Guo X.,et al."Validation of IASI Satellite Ammonia Observations at the Pixel Scale Using In Situ Vertical Profiles".Journal of Geophysical Research: Atmospheres 126.9(2021). |
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