Analysis of pathfinder SST algorithm for global and regional conditions

被引：17
作者：
Kumar A. [1 ]
Minnett P. [1 ]
Podestá G. [1 ]
Evans R. [1 ]
Kilpatrick K. [1 ]
机构：
[1] Meteorology and Physical Oceanography Division, Rosenstiel School of Marine and Atmospheric Science, University of Miami, Miami
来源：
Journal of Earth System Science | 2000年 / 109卷 / 4期
基金：
美国国家航空航天局;
关键词：
AVHRR; Indian ocean; Matchup; Satellite; Sea surface temperature;
D O I：
10.1007/BF02708327
中图分类号：
学科分类号：
摘要：
As part of the Pathfinder program developed jointly by National Aeronautics and Space Administration (NASA) and National Oceanic and Atmospheric Administration (NOAA) a large database of in situ sea surface temperature (SST) measurements coincident with satellite data is now available to the user community. The Pathfinder Matchup Database (PMDB) is a multi-year, multi-satellite collection of coincident measurements from the Advanced Very High Resolution Radiometer (AVHRR) and broadly distributed buoy data (matchups). This database allows the user community to test and validate new SST algorithms to improve the present accuracy of surface temperature measurements from satellites. In this paper we investigate the performance of a global Pathfinder algorithm to specific regional conditions. It is shown that for zenith angles less than 45°, the best-expected statistical discrepancy between satellite and buoy data is about ∼ 0.5 K. In general, the bias of the residuals (satellite - buoy) is negative in most regions, except in the North Atlantic and adjacent seas, where the residuals are always positive. A seasonal signal in SST residuals is observed in all regions and is strongest in the Indian Ocean. The channel-difference term used as a proxy for atmospheric water vapor correction is observed to be unresponsive for columnar water vapor values greater than 45mm and high zenith angles. This . unresponsiveness of the channels leads to underestimation of sea surface temperature from satellites in these conditions.
引用
收藏
页码：395 / 405
页数：10
相关论文
共 21 条
  • [1] Barton I.J., Satellite-derived sea surface temperatures: Current status, J. Geophys. Res., 100, pp. 8777-8790, (1995)
  • [2] Brown J.W., Brown O.B., Evans R.H., Calibration of advanced very high resolution radiometer infrared channels: A new approach to nonlinear correction, J. Geophys. Res., 98, pp. 18257-18268, (1993)
  • [3] Emery W.J., Yu Y., Wick G.A., Schluessel P., Reynolds R.W., Correcting infrared satellite estimates of sea surface temperature for atmospheric water vapor attenuation, J. Geophys. Res., 99, pp. 5219-5236, (1994)
  • [4] Esaias W.E., Abbott M.R., Barton I., Brown O.B., Campbell J.W., Carder K.L., Clark D.K., Evans R.H., Hoge F.E., Gordon H.R., Balch W.M., Letelier R., Minnett P.J., An overview of MODIS capabilities for ocean science observations, IEEE, Transactions on Geoscience and Remote Sensing, 36, 4, pp. 1250-1265, (1998)
  • [5] Eyre J.R., On systematic errors in satellite sounding products and their climatological mean values, Q. J. R. Meteorol. Soc., 113, pp. 279-292, (1987)
  • [6] Harries J.E., Llewellyn-Jones D.T., Minnett P.J., Saunders R.W., Zavody A.M., Observations of sea-surface temperature for climate research, Phil. Trans. R. Soc. London, a, 309, pp. 381-395, (1983)
  • [7] Kearns E.J., Hanafin J.A., Evans R.H., Minnett P.J., Brown O.B., An independent assessment of Pathfinder AVHRR sea surface temperature accuracy using the Marine-Atmosphere Emitted Radiance Interferometer (M-AERI)
  • [8] Bull, Am. Met. Soc., (2000)
  • [9] Kilpatrick K., Podesta G., Evans R., Overview of the NOAA/NASA Pathfinder version 4.2 algorithm for sea surface temperature and associated matchup database, Journal of Geophysical Research., (2001)
  • [10] Llewellyn-Jones D.T., Minnett P.J., Saunders R.W., Zavody A.M., Satellite Multichannel infrared measurements of sea surface temperature of the N. E. Atlantic Ocean using AVHRR/2, Q. J. R. Meteorol. Soc., 110, pp. 613-631, (1984)
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