Optimal estimation of tropospheric H 2 O and δD with IASI/METOP
TLDR
In this article, the IASI spectra were used to retrieve H2O profiles between the surface and the upper troposphere as well as middle tro- pospheric D values.Abstract:
We present optimal estimates of tropospheric H2O and D derived from radiances measured by the instrument IASI (Infrared Atmospheric Sounding Interferometer) flown on EUMETSAT's polar orbiter METOP. We document that the IASI spectra allow for retrieving H2O profiles between the surface and the upper troposphere as well as middle tro- pospheric D values. A theoretical error estimation suggests a precision for H2O of better than 35 % in the lower tro- posphere and of better than 15 % in the middle and upper troposphere, respectively, whereby surface emissivity and atmospheric temperature uncertainties are the leading error sources. For the middle tropospheric D values we estimate a precision of 15-20 ‰ with the measurement noise being the dominating error source. The accuracy of the IASI products is estimated to about 20-10 % and 10 ‰ for lower to upper tropospheric H2O and middle tropospheric D, respectively. It is limited by systematic uncertainties in the applied spec- troscopic parameters and the a priori atmospheric tempera- ture profiles. We compare our IASI products to a large num- ber of near coincident radiosonde in-situ and ground-based FTS (Fourier Transform Spectrometer) remote sensing mea- surements. The bias and the scatter between the different H2O and D data sets are consistent with the combined theo- retical uncertainties of the involved measurement techniques.read more
Citations
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Are elevated moist layers a blind spot for hyperspectral infrared sounders? A model study
TL;DR: In this article, the ability of the hyperspectral satellite-based passive infrared (IR) instrument IASI to resolve elevated moist layers (EMLs) within the free troposphere is investigated.
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Design and description of the MUSICA IASI full retrieval product
TL;DR: In this article , the authors describe the MUSICA IASI full retrieval product data set, which is made available in the form of netCDF data files that are compliant with version 1.7 of the CF (Climate and Forecast) metadata convention.
Journal ArticleDOI
The global and multi-annual MUSICA IASI {H 2 O, δ D} pair dataset
Christopher Diekmann,Christopher Diekmann,Matthias Schneider,Benjamin Ertl,Frank Hase,Omaira García,Farahnaz Khosrawi,Eliezer Sepúlveda,Peter Knippertz,Peter Braesicke +9 more
TL;DR: In this paper, the authors presented a global and multi-annual space-borne dataset of tropospheric { H2O, δ D } pairs that is based on radiance measurements from the nadir thermal infrared sensor IASI (Infrared Atmospheric Sounding Interferometer) on board the Metop satellites of EUMETSAT.
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Intercomparison of arctic XH 2 O observations from three ground-based Fourier transform infrared networks and application for satellite validation
Qiansi Tu,Frank Hase,Thomas Blumenstock,Matthias Schneider,Andreas Schneider,Rigel Kivi,Pauli Heikkinen,Benjamin Ertl,Christopher Diekmann,Farahnaz Khosrawi,Michael Sommer,Tobias Borsdorff,Uwe Raffalski +12 more
TL;DR: In this article, the authors compare column-averaged dry-air mole fractions of water vapor (XH2O ) retrievals from the COllaborative Carbon Column Observing Network (COCCON) with retrieval from two co-located high-resolution Fourier transform infrared (FTIR) spectrometers as references at two boreal sites, Kiruna, Sweden, and Sodankyla, Finland, from 6-March 2017 to 20 September 2019.
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Observation of tropospheric δ D by IASI over the Western Siberia: comparison with a GCM
Matthieu Pommier,Jean-Lionel Lacour,Camille Risi,F. M. Bréon,Cathy Clerbaux,Pierre-François Coheur,K. G. Gribanov,Daniel Hurtmans,Jean Jouzel,Vyacheslav I. Zakharov +9 more
TL;DR: In this article, the authors present a survey of the literature in this area: https://www.referred.org.au/blog/blogging-and-blogging/
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