ARGO upper salinity measurements: Perspectives for L-band radiometers calibration and retrieved sea surface salinity validation

被引:61
作者
Boutin, J [1 ]
Martin, N [1 ]
机构
[1] UPMC, MNHN, IRD,CNRS,UMR7159, Lab Oceanog & Climat Experimentat & Approches Num, F-75252 Paris, France
关键词
microwave radiometry; sea surface; salinity;
D O I
10.1109/LGRS.2005.861930
中图分类号
P3 [地球物理学]; P59 [地球化学];
学科分类号
0708 ; 070902 ;
摘要
With the view of preparing the strategy for the calibration/validation of future L-band satellite radiometers, we examine the salinity variability recorded by Array for Real-Time Geostrophic Oceanography (ARGO) floats in the upper 10-m layer of the surface ocean. Using one year of ARGO measurements, we show that the surface salinity variability at ten days and 200-km scales is above +/- 0.1 psu for 30% of the drifters and that this variability is larger than 0.2 psu in tropical regions affected by strong river discharges and by precipitations, and in frontal areas caracterized by strong mesoscale activity. Vertical gradient observed between 5-10-m depth is much lower than the horizontal variability but leads to systematic biases in the tropics. The South Pacific Ocean appears to be the less variable both vertically and horizontally.
引用
收藏
页码:202 / 206
页数:5
相关论文
共 17 条
[1]   Sea surface salinity measurements in the historical database [J].
Bingham, FM ;
Howden, SD ;
Koblinsky, CJ .
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS, 2002, 107 (C12) :SRF20-1
[2]  
BLOUCH P, 2005, UNPUB 21 DAT BUOY CO
[3]   Objective analyses of hydrographic data for referencing profiling float salinities in highly variable environments [J].
Böhme, L ;
Send, U .
DEEP-SEA RESEARCH PART II-TOPICAL STUDIES IN OCEANOGRAPHY, 2005, 52 (3-4) :651-664
[4]  
Boutin J, 2004, J ATMOS OCEAN TECH, V21, P1432, DOI 10.1175/1520-0426(2004)021<1432:SSRFSM>2.0.CO
[5]  
2
[6]   Upper ocean salinity balance in the western equatorial Pacific [J].
Cronin, MF ;
McPhaden, MJ .
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS, 1998, 103 (C12) :27567-27587
[7]   Time and space scales for sea surface salinity in the tropical oceans [J].
Delcroix, T ;
McPhaden, MJ ;
Dessier, A ;
Gouriou, Y .
DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS, 2005, 52 (05) :787-813
[8]   Sea surface salinity interannual variability in the western tropical Atlantic: An ocean general circulation model study [J].
Ferry, N ;
Reverdin, G .
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS, 2004, 109 (C5) :C050261-11
[9]  
Gould J., 2004, EOS T AGU, V85, P185, DOI DOI 10.1029/2004EO190002
[10]   Soil moisture retrieval from space: The Soil Moisture and Ocean Salinity (SMOS) mission [J].
Kerr, YH ;
Waldteufel, P ;
Wigneron, JP ;
Martinuzzi, JM ;
Font, J ;
Berger, M .
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING, 2001, 39 (08) :1729-1735