Preprints
https://doi.org/10.5194/essd-2022-313
https://doi.org/10.5194/essd-2022-313
 
18 Oct 2022
18 Oct 2022
Status: this preprint is currently under review for the journal ESSD.

High-resolution datasets for lake level changes in the Qinghai-Tibetan Plateau from 2002 to 2021 using multi-altimeter data

Jiaming Chen1,3, Jingjuan Liao1,2, Yanhan Lou1,4, Shanmu Ma1,4, Guozhuang Shen1,2, and Lianchong Zhang1 Jiaming Chen et al.
  • 1Key Laboratory of Digital Earth Science, Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing, 100094, China
  • 2International Research Center of Big Data for Sustainable Development Goals, Beijing 100094, China
  • 3Institute of Geodesy and Geoinformation, University of Bonn, Bonn, Germany
  • 4University of Chinese Academy of Sciences, Beijing 100049, China

Abstract. The Qinghai Tibet Plateau (QTP), known as the Roof of the World and the Water Tower of Asia, has the largest number of lakes in the world, and because of its high altitude and near absence of disturbances by human activity, the plateau has long been an important site for studying global climate change. Hydrological stations cannot be readily set up in this region, and in situ gauge data are not always publicly accessible. Satellite radar altimetry has become a very important alternative to in situ observations as a source of data. Estimation of the water levels of lakes via radar altimetry is often limited by temporal and spatial coverage, and, therefore, multi-altimeter data are often used to monitor lake levels. Restricted by the accuracy of waveform processing and the interval period between different altimetry missions, the accuracy and the sampling frequency of the water level series are typically low. By processing and merging data from eight different altimetry missions, the developed datasets provided the water level changes for 362 lakes (larger than 10 km2) in the QTP from 2002 to 2021. The period for the lake level change series, which affords high accuracy, can be much longer for many lake systems. The present datasets and associated approaches are valuable for calculating the changes in lake storage, trend analyses of the lake levels, short-term monitoring of the overflow of lakes, flooding disasters on the plateau, and the relationships between changes in the lake ecosystems and changes in the water resources.

Jiaming Chen et al.

Status: open (until 03 Jan 2023)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on essd-2022-313', Anonymous Referee #1, 17 Nov 2022 reply
    • AC1: 'Reply on RC1', Jingjuan Liao, 27 Nov 2022 reply

Jiaming Chen et al.

Data sets

High-space-coverage lake level change data sets on the Tibetan Plateau from 2002 to 2021 using multiple altimeter data Chen, J., Liao, J., Deng, W., Shen, G., Zhang, L., Wang, C. https://doi.org/10.1594/PANGAEA.939427

Jiaming Chen et al.

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Short summary
The Qinghai Tibet Plateau (QTP) has the largest number of lakes in the world. Hydrological stations cannot be readily set up in this region due to high altitude and remoteness. Satellite radar altimetry has become a very important alternative to in situ observations as a source of data. By combining eight sets of altimeter data, the trends of the changes in the water levels for 362 lakes in the QTP during 2002–2021 were estimated, and the spatio-temporal changes in lake levels were explored.