On the capabilities of the SWOT satellite to monitor the lake level change over the Third Pole

Xiong, Jinghua1; Jiang, Liguang2; Qiu, Yuanlin1; Wongchuig, Sly3; Abishek4; Guo, Shenglian1; Chen, Jie1

2023-04-01

10.1088/1748-9326/acbfd1

ENVIRONMENTAL RESEARCH LETTERS   Impact Factor & Quartile

1748-9326

The lake level dynamics of the Qinghai-Tibetan Plateau (QTP, also called the 'Third Pole') are a crucial indicator of climate change and human activities; however, they remain poorly measured due to extremely high elevation and cold climate. The existing satellite altimeters also suffer from relatively coarse temporal resolution or low spatial coverage, preventing effective monitoring of lake level change at such a large spatial scale. The recently launched surface water and ocean topography (SWOT) mission is expected to greatly enhance the current lake level monitoring capabilities. However, a systematic evaluation is still lacking in the region. To elucidate this potential, here, we generated SWOT-like lake products for 38 major lakes (>150 km(2)) over the QTP during 2000-2018 using a large-scale SWOT hydrology simulator with the input of satellite altimetry and water mask databases. The comparative assessments between the satellite altimetry data and SWOT simulations using various statistical metrics and decomposed time series components demonstrate that SWOT can successfully monitor both short-term dynamics and long-term trends. Extended experiments to derive SWOT-like data of 783 lakes (>1 km(2)) based on the synthetic lake level series present the spatial pattern of SWOT performance that tends to improve with the increasing lake area. Our findings provide comprehensive inferences and confidence for lake level monitoring in the Third Pole in the early period of the SWOT satellite.

climate change water level lake SWOT CNES simulator

SCI

English

Others

National Key Research and Development Project of China[2021YFC3200303] ; National Natural Science Foundation of China[U20A20317] ; IRD[ANR-18-MPGA-0008]

Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences

Environmental Sciences ; Meteorology & Atmospheric Sciences

WOS:000951999600001

IOP Publishing Ltd

Web of Science

1.Wuhan Univ, State Key Lab Water Resources & Hydropower Engn S, Wuhan 430072, Peoples R China
2.Southern Univ Sci & Technol, Sch Environm Sci & Engn, Shenzhen 518055, Peoples R China
3.Univ Grenoble Alpes, Inst Geosci Environm IGE, IRD, CNRS,UMR 5001, F-38000 Grenoble, France
4.Indian Inst Technol IIT Roorkee, Dept Civil Engn, Roorkee 247667, India

Xiong, Jinghua,Jiang, Liguang,Qiu, Yuanlin,et al. On the capabilities of the SWOT satellite to monitor the lake level change over the Third Pole[J]. ENVIRONMENTAL RESEARCH LETTERS,2023,18(4).

Xiong, Jinghua.,Jiang, Liguang.,Qiu, Yuanlin.,Wongchuig, Sly.,Abishek.,...&Chen, Jie.(2023).On the capabilities of the SWOT satellite to monitor the lake level change over the Third Pole.ENVIRONMENTAL RESEARCH LETTERS,18(4).

Xiong, Jinghua,et al."On the capabilities of the SWOT satellite to monitor the lake level change over the Third Pole".ENVIRONMENTAL RESEARCH LETTERS 18.4(2023).