Brief communication: Mapping Greenland’s perennial firn aquifers using enhanced- resolution L-band brightness temperature image time series
Brief communication: Mapping Greenland’s perennial firn aquifers using enhanced- resolution L-band brightness temperature image time series
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简短通讯：使用增强分辨率 L 波段亮温图像时间序列绘制格陵兰岛多年生冷杉含水层
DOI：
10.5194/tc-2020-30
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发表时间：
2020
期刊：
影响因子：
--
通讯作者：
T. Scambos
中科院分区：
文献类型：
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作者：
Julie Z. Miller;D. Long;K. Jezek;J. Johnson;M. Brodzik;C. Shuman;L. Koenig;T. Scambos
美国宇航局的土壤湿度主动被动（SMAP）卫星在格陵兰冰盖上收集的观测数据生成的增强分辨率L波段亮度温度（TB）图像时间序列用于从太空绘制格陵兰岛多年生冷杉含水层的地图。呈指数下降的 L 波段结核病特征与通过冰盖遥感中心 (CReSIS) 多通道相干雷达测深仪 (MCoRDS) 确定的常年冰冻含水层区域相关，该探测器由 NASA 的冰桥行动 (OIB) 活动进行飞行。通过将这些特征拟合到一组 S 形曲线来开发绘制范围的经验算法。 2016 年春季，发现多年生冷杉含水层面积超过 66 000 平方公里。
Enhanced-resolution L-band brightness temperature (TB) image time series generated from observations collected over the Greenland Ice Sheet by NASA’s Soil Moisture Active Passive (SMAP) satellite are used to map Greenland’s perennial firn aquifers from space. Exponentially decreasing L-band TB signatures are correlated with perennial firn aquifer areas identified via the Center for Remote Sensing of Ice Sheets (CReSIS) Multi-Channel Coherent Radar Depth Sounder (MCoRDS) that was flown by NASA’s Operation IceBridge (OIB) campaign. An empirical algorithm to map extent is developed by fitting these signatures to a set of sigmoidal curves. During the spring of 2016, perennial firn aquifer areas are found to extend over ∼ 66 000 km2.