Using the Global Navigation Satellite System and Precipitation Data to Establish the Propagation Characteristics of Meteorological and Hydrological Drought in Yunnan, China

Zhu, Hai; Chen, Kejie; Hu, Shunqiang; Liu, Junguo; Shi, Haiyun; Wei, Guoguang; Chai, Haishan; Li, Jiafeng; Wang, Tan

doi:10.1029/2022wr033126

Cited by 17 publications

(9 citation statements)

References 100 publications

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“…Li et al, 2015;Huang et al, 2021). Drawing upon these inherent advantages, numerous studies have endeavored to integrate GNSS data with precipitation measurements to estimate PE (e.g., Bordi et al, 2014;Zhu, Chen, Hu, Liu, et al, 2023). This integration holds the potential to provide precise and dependable distribution maps of PE, thereby facilitating investigations on extreme events with higher accuracy and reliability.…”

Section: Introductionmentioning

confidence: 99%

Characterizing extreme drought and wetness in Guangdong, China using global navigation satellite system and precipitation data

Zhu,

Chen,

Chai

et al. 2024

Satell Navig

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As global temperature rises, the frequency of extreme climate events, e.g., severe droughts and floods, has increased significantly and caused severe damage over the past years. To this regard, precipitation efficiency, a crucial meteorological parameter, could provide valuable insights for a better understanding of the patterns and characteristics of these extreme events. In this study, taking Guangdong province as an exemplary region, we first obtained long-term and high-resolution historical records of precipitation efficiency by integrating the observations from a dense network of Global Navigation Satellite System (GNSS) stations with precipitation data, and then characterized the extreme drought and wetness through climate indices. We found a distinct seasonal trend in precipitation efficiency in Guangdong, with annual fluctuations ranging from 10 to 25%. Notably, precipitation efficiency is higher in proximity to the Pearl River Delta Plain and gradually decreases towards the east and west. The occurrence of anomalous peaks and valleys in precipitation efficiency generally corresponds to dry and wet conditions, respectively. A total of 9 extreme wet events and 6 dry events occurred from January 2007 to May 2022, with durations from 3 to 6 months. Our results also demonstrated that both wet and dry frequencies exhibit an increasing trend with the expansion of the time scale, and the frequency of extreme events near the Pearl River Delta Plain surpasses that of other regions. Furthermore, the propagation time from meteorological anomalies to agricultural and hydrological anomalies is about 3 months. The periodic characteristics of meteorological anomalies are identified as the primary driver for other anomalous periodic patterns. Our work unveils the long-term dynamic behavior of precipitation efficiency, as well as the characteristics of extreme drought and wetness events in the regions characterized by intricate land–atmosphere interactions.

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Section: Introductionmentioning

confidence: 99%

Characterizing extreme drought and wetness in Guangdong, China using global navigation satellite system and precipitation data

Zhu,

Chen,

Chai

et al. 2024

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“…(2022) produced a drought severity index, in the contiguous United States, based on GNSS‐measured hydrological loading displacements, which was used also by Zhu et al. (2023) over the Yunnan Province in China.…”

Section: Introductionmentioning

confidence: 99%

“…GNSS displacements have been inverted also to characterize hydrological droughts: produced a drought severity index, in the contiguous United States, based on GNSS-measured hydrological loading displacements, which was used also by Zhu et al (2023) over the Yunnan Province in China. Carlson et al (2022) computed TWS variations in California using a joint inversion method combining the GRACE products with the results of the inversion of GNSS data, taking advantage of the dense spatial distribution of GNSS data together with GRACE's ability to provide regional closure of the water budget.…”

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confidence: 99%

Drought‐Induced Vertical Displacements and Water Loss in the Po River Basin (Northern Italy) From GNSS Measurements

Pintori,

Serpelloni

2024

Earth and Space Science

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We study vertical ground displacement time series from Global Navigation Satellite System (GNSS) stations to measure deformation associated with hydrological drought in the Po river basin. Focusing on interannual trend changes, rather than seasonal (annual) components, we found a clear spatially correlated deformation signal that is temporally (anti)correlated with changes in the Po river level and the SPEI‐12 drought index, with stations moving upward during periods of river/index level decrease and vice versa. In the 2021–2022 time span, which culminated in the most severe drought of the last two centuries, we estimate the amount and spatial distribution of water loss in the basin and its surroundings. Excluding the seasonal signals, between January 2021 and August 2022, the GNSS stations underwent uplift, up to 7 mm, which corresponds to ∼70 Gtons of water loss. Compared to Global Land Data Assimilation System and Gravity Recovery and Climate Experiment estimates, GNSS results show a similar temporal evolution of water content but a more heterogeneous distribution of values. We show that continuous GNSS networks provide an effective way to monitor multiannual trend changes in water storage even in small water basins and serve as a reliable indicator of drought severity.

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“…Commonly, rainfall deficits may first trigger meteorological drought, which further affects soil moisture, runoff and water supply, leading to hydrological, agricultural and socio‐economic droughts. This process is referred to as drought propagation, and most existing studies interpret drought in this forward order, with a focus on the impact of drought on natural and human systems (Apurv & Cai, 2020; Hen et al, 2022; Ma et al, 2023; Zhu et al, 2023). However, the interactions between natural and human systems make the drought propagation process non‐linear and bidirectional (Van Loon et al, 2022).…”

Section: Introductionmentioning

confidence: 99%

Drought propagation across meteorological, hydrological and agricultural systems in the Lancang‐Mekong River Basin

Li,

Feng,

Zhang

et al. 2024

Hydrological Processes

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Drought produces cross‐system impacts, and these interactions between multiple systems are also referred to as drought propagation. However, the complex natural processes and anthropogenic disturbances lead to the drought propagation process being non‐linear and systems feedback, which is still lack of knowledge in large‐scale basins. To address these challenges, we propose a hydro‐economic coupled model and investigate drought propagation across meteorological‐hydrological‐agricultural systems. The results from the Lancang‐Mekong River Basin show that drought propagates from the meteorological system to the hydrological system and is weakened by the basin buffer and storage capacity. This propagation process shows spatial heterogeneity caused by basin characteristics, highlighting that the upstream (CS location) and downstream (KR and KC locations) are more prone to hydrological drought vulnerability. As drought further propagates to the agricultural system, water abstraction behaviours can alleviate the drought situation, leading to crop yield increases ranging from 4.6% to 39.2% through irrigation pathways. Unfortunately, irrigation behaviour also worsens hydrological drought in a feedback loop, where downstream VT (annual discharge decreases by around 1346 m3/s) shows more intense variation than upstream LP (annual discharge decreases by almost 135 m3/s), illustrating the feedback among multi‐systems and accumulation in spatial. Moreover, upstream hydropower and downstream agricultural water use show synergistic relationships, revealing that efficient anthropogenic interventions can positively mitigate the impact of drought on human well‐being. This paper provides an in‐depth understanding of the complex drought propagation process in nature‐human highly coupled Lancang‐Mekong, which may help policymakers and basin managers to better cope with drought.

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Using the Global Navigation Satellite System and Precipitation Data to Establish the Propagation Characteristics of Meteorological and Hydrological Drought in Yunnan, China

Abstract: The frequency of extreme hydrological events (droughts and floods) has increased significantly due to global warming (e.g.,

Cited by 17 publications

References 100 publications

Characterizing extreme drought and wetness in Guangdong, China using global navigation satellite system and precipitation data

Characterizing extreme drought and wetness in Guangdong, China using global navigation satellite system and precipitation data

Drought‐Induced Vertical Displacements and Water Loss in the Po River Basin (Northern Italy) From GNSS Measurements

Drought propagation across meteorological, hydrological and agricultural systems in the Lancang‐Mekong River Basin

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