Quantifying freshwater mass balance in the central Tibetan Plateau by integrating satellite remote sensing, altimetry, and gravimetry

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题名:	Quantifying freshwater mass balance in the central Tibetan Plateau by integrating satellite remote sensing, altimetry, and gravimetry
作者:	曾國欣;Tseng, Kuo-Hsin;Chang, Chung-Pai;Shum, C.;Kuo, Chung-Yen;Liu, Kuan-Ting;Shang, Kun;Jia, Yuanyuan;Sun, Jian
贡献者:	太空及遙測研究中心
关键词:	Altimeters;Altimetry;GRACE (experiment);Gravimetry;Lakes;Mathematical models;Remote sensing;Satellite imagery;Tibetan Plateau;water mass balance
日期:	2016-01-01
上传时间:	2026-04-21 14:37:38 (UTC+8)
出版者:	MDPI Multidisciplinary Digital Publishing Institute;MDPI AG
摘要:	摘要： The Tibetan Plateau (TP) has been observed by satellite optical remote sensing, altimetry, and gravimetry for a variety of geophysical parameters, including water storage change. However, each of these sensors has its respective limitation in the parameters observed, accuracy and spatial-temporal resolution. Here, we utilized an integrated approach to combine remote sensing imagery, digital elevation model, and satellite radar and laser altimetry data, to quantify freshwater storage change in a twin lake system named Chibuzhang Co and Dorsoidong Co in the central TP, and compared that with independent observations including mass changes from the Gravity Recovery and Climate Experiment (GRACE) data. Our results show that this twin lake, located within the Tanggula glacier system, remained almost steady during 1973–2000. However, Dorsoidong Co has experienced a significant lake level rise since 2000, especially during 2000–2005, that resulted in the plausible connection between the two lakes. The contemporary increasing lake level signal at a rate of 0.89 ± 0.05 cm·yr−1, in a 2° by 2° grid equivalent water height since 2002, is higher than the GRACE observed trend at 0.41 ± 0.17 cm·yr−1 during the same time span. Finally, a down-turning trend or inter-annual variability shown in the GRACE signal is observed after 2012, while the lake level is still rising at a consistent rate. 出版者： MDPI AG 出版日期： 2016 出處： Remote sensing (Basel, Switzerland), 2016, Vol.8 (6), p.441-441 資源來源： ProQuest Open Access Content Collection 識別號： ISSN: 2072-4292 識別號： EISSN: 2072-4292 識別號： DOI: 10.3390/rs8060441
显示于类别:	[太空及遙測研究中心] 期刊論文

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