基于MODIS温度的青藏高原多年冻土活动层厚度变化研究

doi:10.13249/j.cnki.sgs.2022.10.017

地理科学 ›› 2022, Vol. 42 ›› Issue (10): 1848-1856.doi: 10.13249/j.cnki.sgs.2022.10.017

• • 上一篇

基于MODIS温度的青藏高原多年冻土活动层厚度变化研究

龚婷婷¹^,²^,³(), 高冰⁴(), 吉子晨⁴, 曹慧宇⁴, 张蕴灵¹^,²^,³

1.中国公路工程咨询集团有限公司，北京 100097
2.空间信息应用与防灾减灾技术交通运输行业研发中心，北京 100097
3.中咨数据有限公司，北京 100097
4.中国地质大学（北京）水资源与环境学院，北京 100083

收稿日期:2021-08-12 修回日期:2022-01-01 出版日期:2022-10-10 发布日期:2022-12-06
通讯作者: 高冰 E-mail:amerindian@126.com;gb03@cugb.edu.cn
作者简介:龚婷婷（1990−），女，江苏盐城人，高级工程师，博士，主要从事交通遥感应用技术研究。E-mail: amerindian@126.com
基金资助:
高分综合交通遥感应用示范系统（二期）(07-Y30B03-9001-19/21)

Variation of Active Layer Thickness of Permafrost in the Qinghai-Tibetan Plateau Based on MODIS Temperature Product

Gong Tingting¹^,²^,³(), Gao Bing⁴(), Ji Zichen⁴, Cao Huiyu⁴, Zhang Yunling¹^,²^,³

1. China Highway Engineering Consultants Corporation, Beijing 100097, China
2. Research and Development Center of Transport Industry of Spatial Information Application and Disaster Prevention and Mitigation Technology, Beijing 100097, China
3. China Highway Engineering Consultanting Corporation Data Co., Ltd., Beijing 100097, China
4. School of Water Resources and Environment, China University of Geosciences (Beijing), Beijing 100083, China

Received:2021-08-12 Revised:2022-01-01 Online:2022-10-10 Published:2022-12-06
Contact: Gao Bing E-mail:amerindian@126.com;gb03@cugb.edu.cn
Supported by:
PRC Application Demonstration System of High Resolution Remote Sensing and Transportation(07-Y30B03-9001-19/21)

摘要/Abstract

摘要：

基于MODIS温度数据，采用TTOP模型和Stefan公式模拟了青藏高原地区的冻土分布并计算了活动层厚度，并与地面观测结果进行了对比。结果表明：2003—2019年青藏高原多年冻土面积为1.01×10⁶ km²；多年冻土活动层厚度区域平均值为1.79 m，活动层厚度区域平均的变化率为3.67 cm/10a，且草甸地区的变化率明显大于草原地区，5100~5300 m高程带的活动层厚度变化速率最大。

关键词: 青藏高原, 多年冻土, 活动层厚度, MODIS数据, Stefan公式

Abstract:

The Qinghai-Tibetan Plateau is the major region covered by permafrost in the middle and low latitudes of the world. The change in permafrost has a significant impact on the hydrological processes and ecological environment on the Qinghai-Tibetan Plateau. In this study, the distribution of frozen soil and active layer thickness (ALT) of permafrost are simulated using the temperature at the top of permafrost (TTOP) model and the Stefan formula, which based on the moderate-resolution imaging spectroradiometer (MODIS) land surface temperature, and the results are compared with the ground observations. The results show that the estimated spatial distribution of permafrost is close to the map of permafrost proposed in previous studies. The ALT of permafrost estimated by MODIS land surface temperature data using Stefan formula has certain accuracies. However, there are some differences between the estimated ALT and observations in the region near the Qinghai-Tibet Highway possibly due to the human activities. The area of permafrost on the Qinghai-Tibetan Plateau is estimated to be about 1.01× 10⁶ km² in the period from 2003 to 2019; the regional averaged ALT on the Qinghai-Tibet Plateau is 1.79 m, and the change rate of ALT on the Qinghai-Tibet Plateau is estimated to be 3.67 cm/10a. The changes in the ALT show differences among different vegetation types. The change rate in meadow area is significantly higher than that in grassland area. The change rate also varies along different elevation intervals. From 4 100 m to 5 700 m, the change rate of ALT first increases and then decreases, and the change rate of ALT shows the largest value in the 5 100-5 300 m elevation intervals. The simulated frozen soil distribution and ALT in this study can provide valuable data support for the study of permafrost in the Qinghai-Tibetan Plateau and may deepen our understanding of the characteristics and changes in permafrost in the Qinghai-Tibetan Plateau.

Key words: Tibetan Plateau, permafrost, active layer thickness, MODIS data, Stefan formula

中图分类号:

P642.14

龚婷婷, 高冰, 吉子晨, 曹慧宇, 张蕴灵. 基于MODIS温度的青藏高原多年冻土活动层厚度变化研究[J]. 地理科学, 2022, 42(10): 1848-1856.

Gong Tingting, Gao Bing, Ji Zichen, Cao Huiyu, Zhang Yunling. Variation of Active Layer Thickness of Permafrost in the Qinghai-Tibetan Plateau Based on MODIS Temperature Product[J]. SCIENTIA GEOGRAPHICA SINICA, 2022, 42(10): 1848-1856.

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数据来源	观测时段	活动层厚度最大值/m	活动层厚度最小值/m	活动层厚度平均值/m
Zhao2021	2011—2013年	2.41	1.37	1.85
Qin2017	2009—2012年	0.86	2.10	1.34

数据来源	R²	RMSE/m
Zhao2021	0.97	0.55
Qin2017	0.40	0.46

基于MODIS温度的青藏高原多年冻土活动层厚度变化研究

Variation of Active Layer Thickness of Permafrost in the Qinghai-Tibetan Plateau Based on MODIS Temperature Product

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