Annual variations of monsoon and drought detected by GPS: A case study in Yunnan, China

Abstract The Global Positioning System (GPS) records monsoonal precipitable water vapor (PWV) and vertical crustal displacement (VCD) due to hydrological loading, and can thus be applied jointly to diagnose meteorological and hydrological droughts. We have analyzed the PWV and VCD observations durin...

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Autores principales:	Weiping Jiang, Peng Yuan, Hua Chen, Jianqing Cai, Zhao Li, Nengfang Chao, Nico Sneeuw
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/0cc9fc19603c4284a5f483869dd87528
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spelling	oai:doaj.org-article:0cc9fc19603c4284a5f483869dd875282021-12-02T16:06:34ZAnnual variations of monsoon and drought detected by GPS: A case study in Yunnan, China10.1038/s41598-017-06095-12045-2322https://doaj.org/article/0cc9fc19603c4284a5f483869dd875282017-07-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-06095-1https://doaj.org/toc/2045-2322Abstract The Global Positioning System (GPS) records monsoonal precipitable water vapor (PWV) and vertical crustal displacement (VCD) due to hydrological loading, and can thus be applied jointly to diagnose meteorological and hydrological droughts. We have analyzed the PWV and VCD observations during 2007.0–2015.0 at 26 continuous GPS stations located in Yunnan province, China. We also obtained equivalent water height (EWH) derived from the Gravity Recovery And Climate Experiment (GRACE) and precipitation at these stations with the same period. Then, we quantified the annual variations of PWV, precipitation, EWH and VCD and provided empirical relationships between them. We found that GPS-derived PWV and VCD (positive means downward movement) are in phase with precipitation and GRACE-derived EWH, respectively. The annual signals of VCD and PWV show linearly correlated amplitudes and a two-month phase lag. Furthermore, the results indicate that PWV and VCD anomalies can also be used to explore drought, such as the heavy drought during winter/spring 2010. Our analysis results verify the capability of GPS to monitor monsoon variations and drought in Yunnan and show that a more comprehensive understanding of the characteristics of regional monsoon and drought can be achieved by integrating GPS-derived PWV and VCD with precipitation and GRACE-derived EWH.Weiping JiangPeng YuanHua ChenJianqing CaiZhao LiNengfang ChaoNico SneeuwNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-10 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Weiping Jiang Peng Yuan Hua Chen Jianqing Cai Zhao Li Nengfang Chao Nico Sneeuw Annual variations of monsoon and drought detected by GPS: A case study in Yunnan, China
description	Abstract The Global Positioning System (GPS) records monsoonal precipitable water vapor (PWV) and vertical crustal displacement (VCD) due to hydrological loading, and can thus be applied jointly to diagnose meteorological and hydrological droughts. We have analyzed the PWV and VCD observations during 2007.0–2015.0 at 26 continuous GPS stations located in Yunnan province, China. We also obtained equivalent water height (EWH) derived from the Gravity Recovery And Climate Experiment (GRACE) and precipitation at these stations with the same period. Then, we quantified the annual variations of PWV, precipitation, EWH and VCD and provided empirical relationships between them. We found that GPS-derived PWV and VCD (positive means downward movement) are in phase with precipitation and GRACE-derived EWH, respectively. The annual signals of VCD and PWV show linearly correlated amplitudes and a two-month phase lag. Furthermore, the results indicate that PWV and VCD anomalies can also be used to explore drought, such as the heavy drought during winter/spring 2010. Our analysis results verify the capability of GPS to monitor monsoon variations and drought in Yunnan and show that a more comprehensive understanding of the characteristics of regional monsoon and drought can be achieved by integrating GPS-derived PWV and VCD with precipitation and GRACE-derived EWH.
format	article
author	Weiping Jiang Peng Yuan Hua Chen Jianqing Cai Zhao Li Nengfang Chao Nico Sneeuw
author_facet	Weiping Jiang Peng Yuan Hua Chen Jianqing Cai Zhao Li Nengfang Chao Nico Sneeuw
author_sort	Weiping Jiang
title	Annual variations of monsoon and drought detected by GPS: A case study in Yunnan, China
title_short	Annual variations of monsoon and drought detected by GPS: A case study in Yunnan, China
title_full	Annual variations of monsoon and drought detected by GPS: A case study in Yunnan, China
title_fullStr	Annual variations of monsoon and drought detected by GPS: A case study in Yunnan, China
title_full_unstemmed	Annual variations of monsoon and drought detected by GPS: A case study in Yunnan, China
title_sort	annual variations of monsoon and drought detected by gps: a case study in yunnan, china
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/0cc9fc19603c4284a5f483869dd87528
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Annual variations of monsoon and drought detected by GPS: A case study in Yunnan, China

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