Optimal estimation of tropospheric H 2 O and δD with IASI/METOP
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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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Journal ArticleDOI
Empirical validation and proof of added value of MUSICA's tropospheric δD remote sensing products
Matthias Schneider,Yenny González,Christoph Dyroff,Emanuel Christner,A. Wiegele,Sabine Barthlott,Omaira García,Eliezer Sepúlveda,Frank Hase,Javier Andrey,Javier Andrey,T. Blumenstock,C. Guirado,Ramón Ramos,Sergio Rodríguez +14 more
TL;DR: In this article, the authors presented a first empirical validation of MUSICA's H2O and δD remote sensing products, generated from ground-based FTIR (Fourier transform infrared), spectrometer and space-based IASI (infrared atmospheric sounding interferometer) observation.
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Aircraft validation of Aura Tropospheric Emission Spectrometer retrievals of HDO / H 2 O
Robert L. Herman,J. E. Cherry,J. M. Young,Jeffery M. Welker,David Noone,David Noone,Susan S. Kulawik,John Worden +7 more
TL;DR: In this article, the authors compare the TES observations of water vapor and the HDO isotopologue with nearly coincident in situ airborne measurements for direct validation of the tES products.
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The MUSICA MetOp/IASI H 2 O and δD products: characterisation and long-term comparison to NDACC/FTIR data
A. Wiegele,Michael Schneider,Frank Hase,Sabine Barthlott,Omaira García,E. Sepúlveda,E. Sepúlveda,Yenny González,T. Blumenstock,Uwe Raffalski,M. Gisi,R. Kohlhepp,R. Kohlhepp +12 more
TL;DR: In this paper, the authors presented the MUSICA IASI data for three different geophysical locations (subtropics, midlatitudes, and Arctic), and provided a comprehensive characterisation of the complex nature of such space-based isotopologue remote-sensing products.
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Emerging Technologies and Synergies for Airborne and Space-Based Measurements of Water Vapor Profiles.
Amin R. Nehrir,Christoph Kiemle,Matthew Lebsock,Gottfried Kirchengast,Stefan A. Buehler,Ulrich Löhnert,Congliang Liu,Peter Charles Hargrave,Maria Barrera-Verdejo,David M. Winker +9 more
TL;DR: Improved measurements of water vapor throughout the troposphere would greatly benefit from the combination of differential absorption lidar focusing on the lower troposphere with passive remote sensors constraining the upper-tropospheric humidity.
Journal ArticleDOI
First data set of H 2 O/HDO columns from the Tropospheric Monitoring Instrument (TROPOMI)
Andreas Schneider,Tobias Borsdorff,Joost aan de Brugh,Franziska Aemisegger,Dietrich G. Feist,Dietrich G. Feist,Dietrich G. Feist,Rigel Kivi,Frank Hase,Matthias Schneider,Jochen Landgraf +10 more
TL;DR: In this article, a new data set of vertical column densities of H2O and HDO retrieved from short-wave infrared (2.3 µm) reflectance measurements by the Tropospheric Monitoring Instrument (TROPOMI) onboard the Sentinel-5 Precursor satellite is presented.
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