Method of principal components for inverse problem of satellite sounding of heavy water in the atmosphere
V.I. Zakharov1, K.G. Gribanov1, R. Imasu2, D. Noone3
1Institute of Natural Sciences, 620083, 51 Lenina, Ekaterinburg, Russia
2Atmosphere and Ocean Research Institute, General Research Building Room No. 315b, 5-1-5 Kashiwanoha, Kashiwa-shi, Chiba 277-8568, Japan
3Cooperative Institute for Research in Environmental Sciences, Campus Box 216, University of Colorado, Boulder, CO 80309-0216, USA
Keywords: атмосфера, спутниковое зондирование, изотопологи водяного пара, atmosphere, satellite sounding, water vapour isotopologues
Abstract
The paper presents a principal component (PC) method for solution of the inverse problem of retrieval of HDO to H2O ratio in the atmosphere from spectra of outgoing Earth’s heat radiation measured with high resolution Fourier spectrometers from satellites. The method is tested by using IMG/ADEOS spectrum data over target area of Pacific Ocean. Intercomparison of results of retrieval of latitudinal distribution of HDO to H2O ratio in the atmosphere from the IMG spectrum data using PC method with the results obtained from TES/AURA spectrum data using conventional optimal estimation methodology is presented. Good agreement between the data in Northern hemisphere and some discrepancies in Southern hemisphere are discussed.
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