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The SPARC Water Vapor Assessment II: assessment of satellite measurements of upper tropospheric humidity

Read, William G. ; Stiller, Gabriele ORCID iD icon 1; Lossow, Stefan 1; Kiefer, Michael 1; Khosrawi, Farahnaz 1; Hurst, Dale; Vömel, Holger; Rosenlof, Karen; Dinelli, Bianca M.; Raspollini, Piera; Nedoluha, Gerald E.; Gille, John C.; Kasai, Yasuko; Eriksson, Patrick; Sioris, Christopher E.; Walker, Kaley A.; Weigel, Katja; Burrows, John P.; Rozanov, Alexei
1 Institut für Meteorologie und Klimaforschung – Atmosphärische Spurenstoffe und Fernerkundung (IMK-ASF), Karlsruher Institut für Technologie (KIT)

Abstract:

Nineteen limb-viewing data sets (occultation, passive thermal, and UV scattering) and two nadir upper tropospheric humidity (UTH) data sets are intercompared and also compared to frost-point hygrometer balloon sondes. The upper troposphere considered here covers the pressure range from 300–100 hPa. UTH is a challenging measurement, because concentrations vary between 2–1000 ppmv (parts per million by volume), with sharp changes in vertical gradients near the tropopause. Cloudiness in this region also makes the measurement challenging. The atmospheric temperature is also highly variable ranging from 180–250 K. The assessment of satellite-measured UTH is based on coincident comparisons with balloon frost-point hygrometer sondes, multi-month mapped comparisons, zonal mean time series comparisons, and coincident satellite-to-satellite comparisons. While the satellite fields show similar features in maps and time series, quantitatively they can differ by a factor of 2 in concentration, with strong dependencies on the amount of UTH. Additionally, time-lag response-corrected Vaisala RS92 radiosondes are compared to satellites and the frost-point hygrometer measurements. ... mehr


Verlagsausgabe §
DOI: 10.5445/IR/1000148295
Veröffentlicht am 02.08.2022
Originalveröffentlichung
DOI: 10.5194/amt-15-3377-2022
Scopus
Zitationen: 4
Web of Science
Zitationen: 3
Dimensions
Zitationen: 5
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Meteorologie und Klimaforschung – Atmosphärische Spurenstoffe und Fernerkundung (IMK-ASF)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2022
Sprache Englisch
Identifikator ISSN: 1867-1381, 1867-8548
KITopen-ID: 1000148295
HGF-Programm 12.11.25 (POF IV, LK 01) Atmospheric composition and circulation changes
Erschienen in Atmospheric Measurement Techniques
Verlag Copernicus Publications
Band 15
Heft 11
Seiten 3377–3400
Vorab online veröffentlicht am 09.06.2022
Nachgewiesen in Scopus
Web of Science
Dimensions
KIT – Die Forschungsuniversität in der Helmholtz-Gemeinschaft
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