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Proceedings Paper

CO2 fluxes in the marine atmospheric boundary layer for hurricane conditions on the base of SAR images of sea surface
Author(s): Daniil A. Sergeev; Yuliya I. Troitskaya; Galina N. Balandina; Maxim I. Vdovin
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Paper Abstract

The research is devoted to the problem of estimations of CO2 fluxes between the hydrosphere and atmosphere. Hurricane-force winds lead to intensive wave breaking, with formation of spray in the air, and bubbles in the water. It strongly intensifies gas flux characterizing by power dependence of the transfer rate on the 10-m height wind speed used for approximation of the empirical results. But available data demonstrate wide variation which leads large confidence limits for coefficients in empirical approximations. On the other hand there is an obvious problem of obtaining reliable data on the wind speed. Widely used reanalysis data typically underestimate wind speed magnitude, due to the low spatial and temporal resolution. One of the most promising ways to measure near water wind speed is the use of the data of remote sensing. The present study used technique to achieve wind speed based on the processing sea surface images obtained in cross-polarized mode with C-band (5.4 GHz) radar with synthesized aperture (RSA) of RADARSAT satellite. To this propose geophysical model function (GMF) which binds values of wind speed and normalized radar cross section in cross-polarized mode was used. This GMF was developed in a special laboratory experiment on the wind-wave flumes for a wide range of wind speeds, including hurricanes. In turn, for parameterization of gas transfer rate results of recent laboratory experiment on high speed wind-wave flume was used.

Paper Details

Date Published: 14 October 2019
PDF: 8 pages
Proc. SPIE 11150, Remote Sensing of the Ocean, Sea Ice, Coastal Waters, and Large Water Regions 2019, 111500U (14 October 2019); doi: 10.1117/12.2530203
Show Author Affiliations
Daniil A. Sergeev, Institute of Applied Physics (Russian Federation)
Yuliya I. Troitskaya, Institute of Applied Physics (Russian Federation)
Galina N. Balandina, Institute of Applied Physics (Russian Federation)
Maxim I. Vdovin, Institute of Applied Physics (Russian Federation)

Published in SPIE Proceedings Vol. 11150:
Remote Sensing of the Ocean, Sea Ice, Coastal Waters, and Large Water Regions 2019
Charles R. Bostater Jr.; Xavier Neyt; Françoise Viallefont-Robinet, Editor(s)

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