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首页> 外文期刊>Journal of Geophysical Research, C. Oceans: JGR >Antarctic sea ice parameters from AMSR-E data using two techniques and comparisons with sea ice from SSM/I
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Antarctic sea ice parameters from AMSR-E data using two techniques and comparisons with sea ice from SSM/I

机译:利用两种技术从AMSR-E数据得到的南极海冰参数,并与来自SSM / I的海冰进行比较

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摘要

Antarctic sea ice concentrations and extents, derived from the satellite passive microwave data of the Advanced Microwave Scanning Radiometer for the Earth Observing System (AMSR-E) are close but not identical depending on which of two major algorithms is used in the calculations. Overall, ice extents tend to be higher and ice concentrations lower when determined from the AMSR-E bootstrap algorithm (ABA) than when determined from the enhanced NASA team (NT2) algorithm, although the differences are within the algorithm error bars. Both algorithms obtain similar negative slopes for the lines of linear least squares fit through the short (4.5-year) AMSR-E data record available so far. When the ABA results are compared with results from the bootstrap algorithm applied over the same time period to data from the Special Sensor Microwave Imager (SSM/I), the two bootstrap results, from different satellites and different instruments, match even more closely than the ABA versus NT2 results from the same AMSR-E instrument. This is encouraging and is likely due to considerable effort to minimize the AMSR-E versus SSM/I bootstrap differences, in consideration of extending the SSM/I record (which goes back to 1987) with the AMSR-E results.
机译:从地球观测系统高级微波扫描辐射仪(AMSR-E)的卫星无源微波数据得出的南极海冰浓度和程度接近,但不完全相同,这取决于计算中使用的是两种主要算法中的哪一种。总体而言,由AMSR-E引导算法(ABA)确定时,与从增强型NASA团队(NT2)算法确定时相比,冰范围往往更高,而冰浓度更低,尽管差异在算法误差范围之内。两种算法对于线性最小二乘法的拟合都获得了相似的负斜率,这些线性拟合到目前为止已有较短的(4.5年)AMSR-E数据记录。当将ABA结果与同一时间段内对特殊传感器微波成像仪(SSM / I)的数据应用自举算法的结果进行比较时,来自不同卫星和不同仪器的两个自举结果的匹配程度甚至比ABA与NT2来自同一AMSR-E仪器。考虑到用AMSR-E结果扩展SSM / I记录(可追溯到1987年),这是令人鼓舞的,并且可能是由于付出了巨大的努力来最小化AMSR-E与SSM / I引导差异。

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