长江科学院院报 ›› 2023, Vol. 40 ›› Issue (4): 177-184.DOI: 10.11988/ckyyb.20220762

• 长江源科学考察与研究专栏 • 上一篇    下一篇

基于遥感与地面实测的青藏高原冻土流域土壤温湿度变化分析

杨涵1,2, 徐平3, 常福宣1, 洪晓峰1, 袁喆1, 何晓波4   

  1. 1.长江科学院 水资源综合利用研究所,武汉 430010;
    2.长江科学院 流域水资源与生态环境科学湖北省重点实验室,武汉 430010;
    3.长江科学院 野外科学观测中心,武汉 430010;
    4.中国科学院西北生态环境资源研究院冰冻圈科学国家重点实验室,兰州 730000
  • 收稿日期:2022-06-29 修回日期:2022-10-11 发布日期:2023-04-26
  • 作者简介:杨涵(1994-),女,湖北武汉人,工程师,博士,主要从事水文学及水资源研究。E-mail: yanghan@mail.crsri.cn
  • 基金资助:
    国家自然科学基金项目(52209007);水利部重大科技项目(SKS-2022039);中央级公益性科研院所基本科研业务费项目(CKSF2021485/SZ)

Dynamic Analysis of Soil Temperature and Soil Moisture in the Permafrost Basin of the Qinghai-Tibet Plateau Based on

Satellite and Ground ObservationsYANG Han1,2, XU Ping3, CHANG Fu-xuan1, HONG Xiao-feng1, YUAN Zhe1, HE Xiao-bo4   

  1. 1. Water Resources Department, Changjiang River Scientific Research Institute, Wuhan 430010, China;
    2. Hubei Key Laboratory of Water Resources & Eco-Environmental Sciences, Changjiang River Scientific Research Institute, Wuhan 430010, China;
    3. Field Scientific Observation Center, Changjiang River Scientific Research Institute, Wuhan 430010, China;
    4. State Key Laboratory of Cryospheric, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China
  • Received:2022-06-29 Revised:2022-10-11 Published:2023-04-26

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摘要： 为研究青藏高原冻土流域土壤温湿度变化特征,在唐古拉冻土流域基于多源遥感(SMAP、ESA CCI)监测数据进行表层土壤温湿度的时空分布刻画,基于地面实测站点(唐古拉冻土气象站、DFIR冻土积雪气象站)数据进行不同深度土壤温湿度的动态分析,并进行遥感与地面站点表层土壤温湿度的对比研究。结果表明,唐古拉冻土流域海拔较低处土壤温度高于海拔较高处,流域东部土壤湿度高于西部;土壤温湿度变化随着埋深加深明显滞后,且冻结期土壤湿度呈现出明显的两段式下降趋势;SMAP土壤温湿度数据与地面站点监测数据相关性较好,相比ESA CCI数据,SMAP数据准确度更高。

关键词: 冻土流域, 青藏高原, 土壤温湿度, SMAP, ESA CCI

Abstract: To obtain the dynamic characteristics of soil in typical permafrost basins of the Qinghai-Tibet Plateau, we characterize the spatiotemporal distribution of surface soil temperature and soil moisture in the Tanggula permafrost region based on multi-source remote sensing (SMAP, ESA CCI) monitoring data. We also analyze the changes of soil temperature and soil moisture at different depths based on ground measurement data from Tanggula permafrost meteorological station and DFIR permafrost snow meteorological station. Our results show that soil temperature is higher at lower altitudes than at higher altitudes in the Tanggula permafrost region, and soil moisture is higher in the eastern part of the region than in the western part. Changes in soil temperature and soil moisture lag significantly behind as depth increases, and soil moisture during freezing periods shows a clear two-stage downward trend. SMAP soil temperature and moisture data are well correlated with ground station monitoring data, and SMAP data are more accurate than ESA CCI data.

Key words: permafrost basin, Qinghai-Tibet Plateau, soil temperature and soil moisture, SMAP, ESA CCI

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