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Journal Article

First Evidence of Mesoscale Ocean Eddies Signature in GNSS Reflectometry Measurements

Authors
/persons/resource/mostafa

Hoseini,  Mostafa
1.1 Space Geodetic Techniques, 1.0 Geodesy, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;

/persons/resource/milad

Asgarimehr,  Milad
1.1 Space Geodetic Techniques, 1.0 Geodesy, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;

Zavorotny,  Valery
External Organizations;

Nahavandchi,  Hossein
External Organizations;

Ruf,  Chris
External Organizations;

/persons/resource/wickert

Wickert,  J.
1.1 Space Geodetic Techniques, 1.0 Geodesy, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;

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Fulltext (public)

5001247.pdf
(Publisher version), 7MB

Supplementary Material (public)
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Citation

Hoseini, M., Asgarimehr, M., Zavorotny, V., Nahavandchi, H., Ruf, C., Wickert, J. (2020): First Evidence of Mesoscale Ocean Eddies Signature in GNSS Reflectometry Measurements. - Remote Sensing, 12, 3, 542.
https://doi.org/10.3390/rs12030542


Cite as: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5001247
Abstract
Feasibility of sensing mesoscale ocean eddies using spaceborne Global Navigation Satellite Systems-Reflectometry (GNSS-R) measurements is demonstrated for the first time. Measurements of Cyclone GNSS (CYGNSS) satellite missions over the eddies, documented in the Aviso eddy trajectory atlas, are studied. The investigation reports on the evidence of normalized bistatic radar cross section ( σ0 ) responses over the center or the edges of the eddies. A statistical analysis using profiles over eddies in 2017 is carried out. The potential contributing factors leaving the signature in the measurements are discussed. The analysis of GNSS-R observations collocated with ancillary data from the European Centre for Medium-Range Weather Forecasts (ECMWF) Reanalysis-5 (ERA-5) shows strong inverse correlations of σ0 with the sensible heat flux and surface stress in certain conditions.