Method and results of retrieval of HDO/H2O in atmosphere from IMG/ADEOS and FTIR data / Toptygin A. Yu.,Gribanov K. G.,Zakharov V. I.,Kasai Y.,Kagawa A.,Murayama Y.,Imasu R.,Schmidt G. A.,Hoffmann G.,Jouzel J. // . - 2006. - V. 6580, l. .

ISSN/EISSN:

0277-786X / нет данных

Type:

Proceedings Paper

Abstract:

Here we present a Principal Components (PCs) method of retrieval of the HDO/H2O vertical profile using atmospheric radiances observed from space by sensor like IMG as well as atmospheric transmittance spectra observed by ground based FTIR. The method is based on the expansion of the retrieved profile on eigenvectors of covariance matrix of model profiles extracted from the isotopic Atmospheric General Circulation Model (AGCM). A priori information of covariance matrix compensates partially the lack of information containing in weighting functions for HDO in lower atmospheric layer (0-1 km) and layers above 10 km. Error estimation of the retrieval scheme was made using closed model computations with synthetic spectra of IMG and known sets of T, H2O, HDO profiles and its value is within 8 parts per thousand - 70 parts per thousand for vertical profile and not greater than 18 parts per thousand for columnar value of HDO/H2O ratio. The method was applied to IMG/ADEOS spectra measured over the ocean in clear sky conditions. Latitudinal distributions of HDO/H2O profile and columnar HDO/H2O ratio are retrieved over Pacific Ocean for the time interval from winter of 1996 to summer of 1997. The retrieved HDO/H2O from IMG/ADEOS data and simulated with isotopic AGCM are in a good agreement. FTIR is Poker Flat high resolution ground based Fourier transform spectrometer for up-looking observation of atmosphere in the spectral range from 750-4300 cm(-1) with resolution 0.0019 cm(-1) and high signal to noise ratio. The spectrometer is located at the Poker Flat Research Range (Altitude 0.61 km; latitude 65.11N; longitude 147.42W) of the Geophysical Institute at the University of Alaska Fairbanks. Poker Flat FTS is operating from 1999, observation modes are atmospheric emission and solar radiation absorption. The measured atmospheric transmittances are supported by sonde observations of T and water vapour profiles. The HDO/H2O PCs retrieval method was also adapted for using the high spectral resolution atmospheric transmittances observed by FTIR. Linear regression of PCs of the HDO/H2O profiles was obtained in this case. Error estimation of the retrieval scheme was made using closed model computations with synthetic spectra of the FrIR and known sets of T, H2O, HDO profiles and its value is within 6 parts per thousand - 67 parts per thousand for vertical profile but not greater than 10\%o for columnar value of HDO/H2O ratio. As an example, HDO/H2O vertical profiles were retrieved using a few samples of FTIR spectra observed at the Poker Flat Research Range from 2000 to 2004 and compared with isotope AGCM outputs for Alaska's atmosphere.

Author keywords:

remote sensing; atmosphere; water vapour isotopes GENERAL-CIRCULATION MODEL; WATER; HDO; CO

DOI:

10.1117/12.724949

Web of Science ID:

ISI:000245102200033

Соавторы в МНС:

Другие поля

Поле	Значение
Editor	Ponomarev, YN and Mikhailenko, SN and Sinitsa, LN
Booktitle	15TH SYMPOSIUM ON HIGH-RESOLUTION MOLECULAR SPECTROSCOPY
Series	Proceedings of SPIE
Note	15th Symposium on High-Resolution Molecular Spectroscopy, Nizhny Novgorod, RUSSIA, JUL 18-21, 2006
Organization	Opt Soc Amer; SPIE Russia Chapter; Russian Fdn Basic Res; Bruker Ltd; Russian Acad Sci, Inst Appl Phys; Russian Acad Sci, Inst Atmospher Opt; Russian Radiat Commiss
Publisher	SPIE-INT SOC OPTICAL ENGINEERING
Address	1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
Language	English
Article-Number	UNSP 65800x
ISBN	978-0-8194-6702-7
Keywords-Plus	GENERAL-CIRCULATION MODEL; WATER; HDO; CO
Research-Areas	Spectroscopy
Web-of-Science-Categories	Spectroscopy
Author-Email	vz@uraltc.ru
ResearcherID-Numbers	Schmidt, Gavin/D-4427-2012 Gribanov, Konstantin/P-3479-2015
ORCID-Numbers	Schmidt, Gavin/0000-0002-2258-0486 Murayama, Yasuhiro/0000-0003-1129-334X
Number-of-Cited-References	19
Usage-Count-Last-180-days	1
Usage-Count-Since-2013	7
Doc-Delivery-Number	BFW50