MODIS LST产品青藏高原冻土图的精度验证

doi:10.7522/j.issn.1000-0240.2017.0009

摘要/Abstract

摘要： 利用遥感数据可以大大提高青藏高原多年冻土分类和制图效率，并降低在环境恶劣、地形复杂的高寒区域所需的观测要求，从而避免人力和物力的巨大消耗。为了验证基于MODIS LST产品制作的青藏高原冻土图的精度，通过选取青藏高原东部的温泉区域和西北部的西昆仑山地区对1：400万青藏高原冻土图、1：300万青藏高原冻土图、基于MODIS LST产品青藏高原冻土图进行综合验证，以此评估基于MODIS LST产品的青藏高原冻土图精度。结果表明，利用遥感数据制作的青藏高原冻土图较已有冻土图能够更好反映多年冻土的空间分布特征，同时存在差异的地方大多是多年冻土与季节冻土过渡的边缘区域，形成原因主要是制图时间差异，此外还有坡度、坡向、植被、积雪等多重因素的综合影响。

关键词: 青藏高原, LST, 冻土制图, 精度验证

Abstract: The use of remote sensing data can greatly improve the efficiency of the Tibetan Plateau permafrost classification and mapping, and less require the observation in cold terrain, which avoid the huge consumption of manpower and material resources. To assess the accuracy of the Permafrost Map based on MODIS LST products, in this study, the 1:4 000 000 Tibetan Plateau Permafrost Map, the 1:3 000 000 Tibetan Plateau Permafrost Map and the Tibetan Plateau Permafrost Map based on MODIS LST product were validated comprehensively in the Wenquan area in the east of the plateau and the West Kunlun Mountains in the northwest of Tibetan Plateau. The results show that the Tibetan Plateau Permafrost Mapping based on MODIS LST product can better reflect the distribution and features of the permafrost. At the same time, there are many differences between the permafrost and seasonal frozen soil edge regions, mainly due to the mapping time difference, local factors, vegetation, snow cover and other multiple factors.

Key words: Tibetan Plateau, land surface temperature, permafrost mapping, accuracy verification

中图分类号:

P642.14/TP79

石亚亚, 杨成松, 车涛. MODIS LST产品青藏高原冻土图的精度验证[J]. 冰川冻土, 2017, 39(1): 70-78.

SHI Yaya, YANG Chengsong, CHE Tao. Accuracy verification of the Tibetan Plateau Permafrost Map based on MODIS LST product[J]. JOURNAL OF GLACIOLOGY AND GEOCRYOLOGY, 2017, 39(1): 70-78.

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