Bo Zhong , Xianpao Li , Qiong Li , Jiangtao Tan , Xianyun Dai
{"title":"评估亚马逊河流域两种不同反演策略估算的陆地储水量周变化","authors":"Bo Zhong , Xianpao Li , Qiong Li , Jiangtao Tan , Xianyun Dai","doi":"10.1016/j.geog.2023.07.007","DOIUrl":null,"url":null,"abstract":"<div><p>In this study, we estimated the weekly Gravity Recovery and Climate Experiment (GRACE) spherical harmonic (SH) solutions and regional mascon solutions using GRACE-based Geopotential Difference (GPD) data and investigated their abilities in retrieving terrestrial water storage (TWS) changes over the Amazon River Basin (ARB) from January 2003 to February 2013. The performance of the weekly GPD-SH and GPD-mascon solutions was evaluated by comparing them with the weekly GFZ-SH solutions, Global Land Data Assimilation Systems (GLDAS)-NOAH hydrological model outputs, and monthly GFZ-SH, GPD-SH, and CSR-mascon solutions in the spatio-temporal and spectral domains. The results demonstrate that the weekly GPD-SH and GPD-mascon present good consistency with the weekly GFZ-SH solutions and GLDAS-NOAH estimates in the spatio-temporal domains, but GPD-mascon presents stronger signal amplitudes and more spatial details. The comparison of the monthly average of weekly estimates and monthly solutions demonstrates that the weekly GPD-mascon and GFZ-SH with DDK1 filtering are close to the monthly CSR-mascon and GFZ-SH solutions, respectively. However, the signal amplitudes of TWS changes from GPD-SH and GFZ-SH with 650 km Gaussian filtering are smaller than the monthly solutions, and the corresponding Root Mean Square Errors between the TWS change time series from the monthly average of weekly solutions and monthly estimates are 18.12 mm (GPD-mascon), 18.81 mm (GFZ-SH-DDK1), 24.93 mm (GPD-SH-G650km), and 33.07 mm (GFZ-SH-G650km), respectively. Additionally, the TWS change time series derived from weekly solutions present more high-frequency time-varying information than monthly solutions. Furthermore, the 300 km Gaussian filtering can improve the signal amplitudes of TWS changes from the weekly GPD-SH solutions more than those with 650 km Gaussian filtering, but the corresponding noise level is higher. The weekly GPD-SH and GPD-mascon solutions can extend the application scopes of GRACE and provide good complements to the current GRACE monthly solutions.</p></div>","PeriodicalId":46398,"journal":{"name":"Geodesy and Geodynamics","volume":"14 6","pages":"Pages 614-626"},"PeriodicalIF":2.8000,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S167498472300071X/pdfft?md5=c7b5c03026e3627afa091d0dca504666&pid=1-s2.0-S167498472300071X-main.pdf","citationCount":"0","resultStr":"{\"title\":\"Evaluating the weekly changes in terrestrial water storage estimated by two different inversion strategies in the Amazon River Basin\",\"authors\":\"Bo Zhong , Xianpao Li , Qiong Li , Jiangtao Tan , Xianyun Dai\",\"doi\":\"10.1016/j.geog.2023.07.007\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>In this study, we estimated the weekly Gravity Recovery and Climate Experiment (GRACE) spherical harmonic (SH) solutions and regional mascon solutions using GRACE-based Geopotential Difference (GPD) data and investigated their abilities in retrieving terrestrial water storage (TWS) changes over the Amazon River Basin (ARB) from January 2003 to February 2013. The performance of the weekly GPD-SH and GPD-mascon solutions was evaluated by comparing them with the weekly GFZ-SH solutions, Global Land Data Assimilation Systems (GLDAS)-NOAH hydrological model outputs, and monthly GFZ-SH, GPD-SH, and CSR-mascon solutions in the spatio-temporal and spectral domains. The results demonstrate that the weekly GPD-SH and GPD-mascon present good consistency with the weekly GFZ-SH solutions and GLDAS-NOAH estimates in the spatio-temporal domains, but GPD-mascon presents stronger signal amplitudes and more spatial details. The comparison of the monthly average of weekly estimates and monthly solutions demonstrates that the weekly GPD-mascon and GFZ-SH with DDK1 filtering are close to the monthly CSR-mascon and GFZ-SH solutions, respectively. However, the signal amplitudes of TWS changes from GPD-SH and GFZ-SH with 650 km Gaussian filtering are smaller than the monthly solutions, and the corresponding Root Mean Square Errors between the TWS change time series from the monthly average of weekly solutions and monthly estimates are 18.12 mm (GPD-mascon), 18.81 mm (GFZ-SH-DDK1), 24.93 mm (GPD-SH-G650km), and 33.07 mm (GFZ-SH-G650km), respectively. Additionally, the TWS change time series derived from weekly solutions present more high-frequency time-varying information than monthly solutions. Furthermore, the 300 km Gaussian filtering can improve the signal amplitudes of TWS changes from the weekly GPD-SH solutions more than those with 650 km Gaussian filtering, but the corresponding noise level is higher. The weekly GPD-SH and GPD-mascon solutions can extend the application scopes of GRACE and provide good complements to the current GRACE monthly solutions.</p></div>\",\"PeriodicalId\":46398,\"journal\":{\"name\":\"Geodesy and Geodynamics\",\"volume\":\"14 6\",\"pages\":\"Pages 614-626\"},\"PeriodicalIF\":2.8000,\"publicationDate\":\"2023-11-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://www.sciencedirect.com/science/article/pii/S167498472300071X/pdfft?md5=c7b5c03026e3627afa091d0dca504666&pid=1-s2.0-S167498472300071X-main.pdf\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Geodesy and Geodynamics\",\"FirstCategoryId\":\"1089\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S167498472300071X\",\"RegionNum\":4,\"RegionCategory\":\"地球科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"GEOCHEMISTRY & GEOPHYSICS\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Geodesy and Geodynamics","FirstCategoryId":"1089","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S167498472300071X","RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"GEOCHEMISTRY & GEOPHYSICS","Score":null,"Total":0}
Evaluating the weekly changes in terrestrial water storage estimated by two different inversion strategies in the Amazon River Basin
In this study, we estimated the weekly Gravity Recovery and Climate Experiment (GRACE) spherical harmonic (SH) solutions and regional mascon solutions using GRACE-based Geopotential Difference (GPD) data and investigated their abilities in retrieving terrestrial water storage (TWS) changes over the Amazon River Basin (ARB) from January 2003 to February 2013. The performance of the weekly GPD-SH and GPD-mascon solutions was evaluated by comparing them with the weekly GFZ-SH solutions, Global Land Data Assimilation Systems (GLDAS)-NOAH hydrological model outputs, and monthly GFZ-SH, GPD-SH, and CSR-mascon solutions in the spatio-temporal and spectral domains. The results demonstrate that the weekly GPD-SH and GPD-mascon present good consistency with the weekly GFZ-SH solutions and GLDAS-NOAH estimates in the spatio-temporal domains, but GPD-mascon presents stronger signal amplitudes and more spatial details. The comparison of the monthly average of weekly estimates and monthly solutions demonstrates that the weekly GPD-mascon and GFZ-SH with DDK1 filtering are close to the monthly CSR-mascon and GFZ-SH solutions, respectively. However, the signal amplitudes of TWS changes from GPD-SH and GFZ-SH with 650 km Gaussian filtering are smaller than the monthly solutions, and the corresponding Root Mean Square Errors between the TWS change time series from the monthly average of weekly solutions and monthly estimates are 18.12 mm (GPD-mascon), 18.81 mm (GFZ-SH-DDK1), 24.93 mm (GPD-SH-G650km), and 33.07 mm (GFZ-SH-G650km), respectively. Additionally, the TWS change time series derived from weekly solutions present more high-frequency time-varying information than monthly solutions. Furthermore, the 300 km Gaussian filtering can improve the signal amplitudes of TWS changes from the weekly GPD-SH solutions more than those with 650 km Gaussian filtering, but the corresponding noise level is higher. The weekly GPD-SH and GPD-mascon solutions can extend the application scopes of GRACE and provide good complements to the current GRACE monthly solutions.
期刊介绍：
Geodesy and Geodynamics launched in October, 2010, and is a bimonthly publication. It is sponsored jointly by Institute of Seismology, China Earthquake Administration, Science Press, and another six agencies. It is an international journal with a Chinese heart. Geodesy and Geodynamics is committed to the publication of quality scientific papers in English in the fields of geodesy and geodynamics from authors around the world. Its aim is to promote a combination between Geodesy and Geodynamics, deepen the application of Geodesy in the field of Geoscience and quicken worldwide fellows'' understanding on scientific research activity in China. It mainly publishes newest research achievements in the field of Geodesy, Geodynamics, Science of Disaster and so on. Aims and Scope: new theories and methods of geodesy; new results of monitoring and studying crustal movement and deformation by using geodetic theories and methods; new ways and achievements in earthquake-prediction investigation by using geodetic theories and methods; new results of crustal movement and deformation studies by using other geologic, hydrological, and geophysical theories and methods; new results of satellite gravity measurements; new development and results of space-to-ground observation technology.
京公网安备 11010802042870号
京ICP备2023020795号-1
分享
求助内容：
应助结果提醒方式：
扫码关注我们
