青藏高原每日无云积雪产品（2004-2013）

结合MODIS积雪产品Terra/Aqua（500 m）与IMS（4 km），发展了青藏高原每日无云高分辨率积雪产品 (TAI, 500 m)。其相对于原始的MODIS Terra（云覆盖46.6%）和Aqua（55.1%）、及MODIS Terra-Aqua结合（37.3%），将云遮蔽全部去除。同时，提高了积雪成图，新生成的TAI产品的积雪面积为19.1%，相对于原始的MODIS Terra/Aqua及MODIS Terra-Aqua结合（积雪面积4.7%～8.1%），显示了大大的提高。与青藏高原105个站点雪深数据验证表明，TAI产品的总精度为94%，相对于MODIS Terra（55%）、MODIS Aqua（50%）、及MODIS Terra-Aqua结合（64%），都显示了较大的提高，特别是雪深大于4 cm时效果较好。

A daily cloud-free high-resolution snow cover product (TAI, 500 m) over the Tibetan Plateau was developed by integrating MODIS snow products from Terra/Aqua (500 m) and IMS (4 km). Compared with the original MODIS Terra (cloud cover: 46.6%), MODIS Aqua (55.1%), and the combined MODIS Terra-Aqua product (37.3%), the TAI product completely eliminates cloud contamination. Meanwhile, the snow mapping performance is substantially enhanced: the snow cover area of the newly generated TAI product reaches 19.1%, which is greatly improved compared to the original MODIS Terra/Aqua and combined MODIS Terra-Aqua products, whose snow cover areas range from 4.7% to 8.1%. Validation using snow depth data from 105 meteorological stations across the Tibetan Plateau demonstrates that the overall accuracy of the TAI product reaches 94%, which is significantly higher than that of MODIS Terra (55%), MODIS Aqua (50%), and the combined MODIS Terra-Aqua product (64%). Particularly, the product performs better when the snow depth exceeds 4 cm.

搜集汇总

背景与挑战

背景概述

该数据集为青藏高原每日无云积雪产品（2004-2013），结合MODIS Terra/Aqua和IMS数据，生成了每日无云高分辨率（500米）积雪产品，显著降低了云遮蔽并提高了积雪成图精度。与原始MODIS产品相比，TAI产品的积雪面积和总精度均有显著提升，尤其在雪深大于4厘米时效果更好。