Estimation of annual variation of water vapor in the Arctic Ocean between 80°-87°N using shipborne GPS data based on kinematic precise point positioning
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摘要: 水汽含量及变化是气象和气候研究的一项重要参数。本世纪初发展起来的地基GPS遥感水汽技术能提供高精度(1-2mm)、高时间分辨率和高地面覆盖率的可降水量PWV序列。同时,一些实验表明,基于移动平台的GPS遥感水汽和地基遥感水汽精度相当。因此,为了更好地开展多种气象和气候研究,如卫星数据资料的校准、海空交换面各种特性及气象预报,需要把这个技术扩展到海洋并进行相关研究。基于以上目的,本文把GPS精密单点定位技术应用到北冰洋(80-87°N)地区的水汽研究,同时计算了2008年和2012年水汽的变化量,其变化特性和正在增强的温室效应一致。Abstract: The measurement of atmospheric water vapor (WV) content and variability is important for meteorological and climatological research. A technique for the remote sensing of atmospheric WV content using ground-based Global Positioning System (GPS) has become available, which can routinely achieve accuracies for integrated WV content of 1-2 kg/m2. Some experimental work has shown that the accuracy of WV measurements from a moving platform is comparable to that of (static) land-based receivers. Extending this technique into the marine environment on a moving platform would be greatly beneficial for many aspects of meteorological research, such as the calibration of satellite data, investigation of the air-sea interface, as well as forecasting and climatological studies. In this study, kinematic precise point positioning has been developed to investigate WV in the Arctic Ocean (80°-87°N) and annual variations are obtained for 2008 and 2012 that are identical to those related to the enhanced greenhouse effect.
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