Detection of coastal polynyas with passive microwave data
Detection of coastal polynyas with passive microwave data
复制标题
利用被动微波数据探测沿海冰间湖
DOI：
10.3189/s0260305500013094
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发表时间：
1993
影响因子：
2.9
通讯作者：
B. Burns
中科院分区：
文献类型：
--
作者：
T. Markus;B. Burns
提出了一种利用被动微波数据探测亚像素尺度冰穴的方法。通过模拟卫星飞越海岸，产生了海冰到陆架冰的亮温转换模型，有和没有沿海冰间湖。该模型与图像数据进行比较，沿着横断面整个海岸，相关系数被用来确定最适合的模型，从而检测开放水域的影响。Polynya地区来自一个单一的SSM/I立交桥比较一致的AVHRR数据显示，平均差异为156平方公里。基于哈雷研究站附近研究区域每日平均SSM/I数据的较长时间序列表明，冰穴的打开和关闭与研究站的风数据高度相关。
A method to detect sub-pixel-scale polynyas with passive microwave data has been developed. Models for the brightness temperature transition from sea ice to shelf ice, with and without a coastal polynya, are generated by simulating the satellite overflight across the coast. The models are compared with image data along transects across the coast; correlation coefficients are used to determine the best-fit model and thereby detect the influence of open water. Polynya areas derived from a single SSM/I overpass compare well with coincident AVHRR data showing a mean difference of 156 km2. A longer time series based on daily averaged SSM/I data over a study area adjacent to research station Halley indicates that the opening and closing of polynyas are highly correlated with station wind data.