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URN: urn:nbn:de:swb:90-604978

First characterization and validation of FORLI-HNO3 vertical profiles retrieved from IASI/Metop

Ronsmans, Gaétane; Langerock, Bavo; Wespes, Catherine; Hannigan, James W.; Hase, Frank; Kerzenmacher, Tobias; Mahieu, Emmanuel; Schneider, Matthias; Smale, Dan; Hurtmans, Daniel; De Mazière, Martine; Clerbaux, Cathy; Coheur, Pierre-François

Abstract:
Knowing the spatial and seasonal distributions of nitric acid (HNO$_{3}$) around the globe is of great interest and allows us to comprehend the processes regulating stratospheric ozone, especially in the polar regions. Due to its unprecedented spatial and temporal sampling, the nadir-viewing Infrared Atmospheric Sounding Interferometer (IASI) is capable of sounding the atmosphere twice a day globally, with good spectral resolution and low noise. With the Fast Optimal Retrievals on Layers for IASI (FORLI) algorithm, we are retrieving, in near real time, columns as well as vertical profiles of several atmospheric species, among which is HNO$_{3}$. We present in this paper the first characterization of the FORLI-HNO$_{3}$ profile products, in terms of vertical sensitivity and error budgets. We show that the sensitivity of IASI to HNO$_{3}$ is highest in the lower stratosphere (10–20 km), where the largest amounts of HNO$_{3}$ are found, but that the vertical sensitivity of IASI only allows one level of information on the profile (degrees of freedom for signal, DOFS; ~1). The sensitivity near the surface is negligible in most cases, and ... mehr


Zugehörige Institution(en) am KIT Institut für Meteorologie und Klimaforschung - Atmosphärische Spurenstoffe und Fernerkundung (IMK-ASF)
Publikationstyp Zeitschriftenaufsatz
Jahr 2016
Sprache Englisch
Identifikator ISSN: 1867-1381, 1867-8548
KITopen ID: 1000060497
HGF-Programm 12.03.01; LK 01
Erschienen in Atmospheric measurement techniques
Band 9
Heft 9
Seiten 4783-4801
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