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A new algorithm for microwave radiometer remote sensing of sea surface salinity and temperature

Science China Earth Sciences 2006年第11期49卷 1204-1211页

作者： YIN Xiaobin1, LIU Yuguang1, WANG Zhenzhan2 & XIU Peng1 1. Physical Oceanography Laboratory, Ocean University of China, Qingdao 266003, China 2. Center for Space and Applied Research, Chinese Academy of Sciences, Beijing 100080, China Physical Oceanography Laboratory Ocean University of China Qingdao China Center for Space and Applied Research Chinese Academy of Sciences Beijing China

The microwave radiation of the sea surface, which is denoted by the sea surface brightness temperature, is not only related with sea surface salinity (SSS) and temperature (SST), but also influenced by sea surface wind. The errors of wind detected by satellite sensor have significant influences on the accuracy of SSS and SST retrieval. The effects of sea surface wind on sea surface brightness temperature, i.e. △Th,v, and the relations among △Th,v, wind speed, sea surface tempera- ture, sea surface salinity and incidence angle of observation are investigated. Based on the investi- gations, a new algorithm depending on the design of a single radiometer with double polarizations and multi-incidence angles is proposed. The algorithm excludes the influence of sea surface wind on SSS and SST retrieval, and provides a new method for remote sensing of SSS and SST.

关键词： microwave radiometer, sea surface temperature, sea surface salinity, wind, brightness temperature.

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Diatom assemblages and quantitative reconstruction for paleosalinity from a sediment core of Chencuo Lake,southern Tibet

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Science China Earth Sciences 2004年第6期47卷 522-528页

作者： C. Kamenik R.Schmidt Institute of Limnology Austrian Academy of Sciences A-5310 Mondsee AustriaInstitute of Limnology Austrian Academy of Sciences A-5310 Mondsee Austria

Combining with the diatom-based conductivity transfer function from Qing-hai-Xizang (Tibetan) Plateau lakes, the lake salinity for the past 300 years was quantitatively reconstructed based on the analysis of diatom assemblages from a sediment core in Chencuo Lake, southern Tibet. The distinct negative relationship between inferred conductivity and recorded lakelevels in recent years suggests that the lake salinity can reflect the fluctuations of effective moisture of climate in lake area. The salinity inferred from diatoms reveals several major hydrological episodes. An obvious desalination of lake water occurred during the last cold interval of the Little Ice Age (about 1845–1885 AD), indicating a cold and moist climate. The lake salinity presented a rapid increase trend since the middle 1960s, with a peak value and high amplitude of salinity variability in the whole past 300 years. The low effective moisture inferred from the lake salinity may have contributed to the enhanced evaporation by the continuous increase of temperature in recent years. Keywords diatoms - conductivity or salinity - quantitative reconstruction - Chencuo Lake

关键词： diatoms, conductivity or salinity, quantitative reconstruction, Chencuo Lake.

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