不同滤波方法对GRACE反演西南岩溶区陆地水储量变化的影响

张青全; 潘云; 宫辉力; 郑龙群; 诸云强

doi:10.3799/dqkx.2019.153

Volume 44 Issue 9

Sep. 2019

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Article Navigation > Earth Science > 2019 > 44(9): 2955-2962

Zhang Qingquan, Pan Yun, Gong Huili, Zheng Longqun, Zhu Yunqiang, 2019. The Impact of Different GRACE Filtering Methods on Inversing Terrestrial Water Storage Change in Southwestern Karst Area. Earth Science, 44(9): 2955-2962. doi: 10.3799/dqkx.2019.153

Citation:

Zhang Qingquan, Pan Yun, Gong Huili, Zheng Longqun, Zhu Yunqiang, 2019. The Impact of Different GRACE Filtering Methods on Inversing Terrestrial Water Storage Change in Southwestern Karst Area. Earth Science, 44(9): 2955-2962. doi: 10.3799/dqkx.2019.153

Citation:

Zhang Qingquan, Pan Yun, Gong Huili, Zheng Longqun, Zhu Yunqiang, 2019. The Impact of Different GRACE Filtering Methods on Inversing Terrestrial Water Storage Change in Southwestern Karst Area. Earth Science, 44(9): 2955-2962. doi: 10.3799/dqkx.2019.153

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The Impact of Different GRACE Filtering Methods on Inversing Terrestrial Water Storage Change in Southwestern Karst Area

doi: 10.3799/dqkx.2019.153

Zhang Qingquan^{1,2
,},
Pan Yun^{1,2
,
,},
Gong Huili^1,2,
Zheng Longqun^1,2,
Zhu Yunqiang³

1.
Beijing Laboratory of Water Resources Security, Capital Normal University, Beijing 100048, China
2.
College of Resource Environment and Tourism, Capital Normal University, Beijing 100048, China
3.
State Key Laboratory of Resources and Environmental Information System, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China

Received Date: 2019-06-12
Publish Date: 2019-09-15

Abstract

Abstract

The results of different filtering methods for inversing changes in terrestrial water reserves are different, but there are relatively few comparative studies between different filtering methods for the southwestern karst area. This paper uses four filtering methods, namely Gauss 200 km, Fan 200 km, Han 200 km and DDK4 on the inversion of terrestrial water storage in the southwestern karst area, and uses scale factors to correct. In spatial distribution, Han and Fan filters are smoother than Gauss filters, but the loss of real signals is more, and Han filter loss is the most serious. DDK filtering can maintain the magnitude and shape of the original signal while performing north-south filtering. In the time series, the four filtered Terrestrial Water Storage Anomalies (TWSA) annual trends are 8.64, 8.77, 9.05 and 9.39, respectively. The annual amplitudes are 82.30, 87.47, 107.70 and 78.51. The spatial distribution of terrestrial water reserves inversion by different filters is quite different. The annual phase of the four filters is not much different, and due to the influence of scale factors, the order of corrected anomalous amplitude of terrestrial water storageis:Han > Fan > Gauss > DDK. For the inversion of terrestrial water storage change in the study area, Fan filtering and DDK filtering are better.
- GRACE,
- Gauss filter,
- Fan filter,
- Han filter,
- DDK filter,
- TWSC,
- hydrogeology

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References(37)

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