Spatiotemporal characteristics of meteorological drought events in 34 major global river basins during 1901–2021

The Science of The Total Environment, Год журнала: 2024, Номер 921, С. 170913 - 170913

Опубликована: Фев. 12, 2024

Язык: Английский

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Investigation of 2020–2022 extreme floods and droughts in Sichuan Province of China based on joint inversion of GNSS and GRACE/GFO data

Journal of Hydrology, Год журнала: 2024, Номер 632, С. 130868 - 130868

Опубликована: Фев. 15, 2024

Язык: Английский

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

Satellite Navigation, Год журнала: 2024, Номер 5(1)

Опубликована: Янв. 1, 2024

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

Язык: Английский

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Propagation characteristics of meteorological drought to hydrological drought considering nonlinear correlations - A case study of the Hanjiang River Basin, China

Ecological Informatics, Год журнала: 2024, Номер 80, С. 102512 - 102512

Опубликована: Фев. 4, 2024

Meteorological drought serves as the precursor to hydrological drought. Clarifying propagation characteristics from meteorological is crucial for predicting and mitigating this severe natural disaster. In study, we proposed an assessment framework that integrates both linear nonlinear methods characterize transition in terms of response time, effective transformation rate, threshold. Utilizing ERA5 land reanalysis data (1951–2022) focusing on Hanjiang River Basin China, analyzed features with without inter-basin water diversion. Extracted event pairs indicate a more significant does not necessarily result drought, vice versa, which confirms The times derived using method are, average, two months shorter than those method. Inter-basin diversion will weaken correlation while strengthening correlation. When annual exceeds 12.0 billion m3, time experience sudden reduction. This research provides scientific reference basin-scale resource management mitigation practice.

Язык: Английский

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From meteorological to agricultural drought: Propagation time and influencing factors over diverse underlying surfaces based on CNN-LSTM model

Ecological Informatics, Год журнала: 2024, Номер 82, С. 102681 - 102681

Опубликована: Июнь 17, 2024

As global warming intensifies and extreme weather events become more frequent, the severity of drought conditions in China's Xinjiang region has escalated. This exacerbates socio-economic pressures area presents increasingly formidable challenges for future. In response to these challenges, researching phenomena is imperative. study employs Bayesian methods copula functions estimate propagation time. It utilizes a hybrid deep learning model (CNN-LSTM) analyze process its influencing factors across four land cover types: crops, forest land, grassland, unused land. The findings indicate that Cropland experiences longest average time (5.27 months), while forests have shortest duration (4.2 months). Unused grassland exhibit similar durations (4.8 On an annual scale, each type manifests two phases: from January May June December. former phase shows ranging 6 9 months, latter ranges 1 5 months; both demonstrate increasing trend over Seasonally, all Land Cover Types pattern shorter times summer autumn compared with winter spring. Moreover, longer correlates greater disparity between meteorological resultant agricultural severity. analyzing influence on propagation, soil moisture content El Niño-Southern Oscillation(ENSO) were found significantly impact Types, progressively strengthening their years.

Язык: Английский

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Characterizing hydrological droughts within three watersheds in Yunnan, China from GNSS-inferred terrestrial water storage changes constrained by GRACE data

Geophysical Journal International, Год журнала: 2023, Номер 235(2), С. 1581 - 1599

Опубликована: Июль 27, 2023

SUMMARY The spatiotemporal evolution of drought is often modulated by climate and watershed characteristics. While numerous studies using space geodesy have been conducted in Yunnan, the scarcity limited sensitivity observation instruments hindered development watershed-scale analyses. This study aims to accurately characterize hydrological droughts within three watersheds Yunnan from 2011 January 2021 May a Global Navigation Satellite System (GNSS) inversion constrained Gravity Recovery Climate Experiment (GRACE) data. Initially, we employed Variational Bayesian Independent Component Analysis reconstruct 3-D crustal deformations at 43 GNSS stations resulting loadings. We then computed time-series vertical displacements caused GRACE Mascon water products. Subsequently, utilizing method least squares, derived scaling factors between (VCD) obtained observations synthetic By combing scaling-factor-adjusted VCDs with data, accurate estimates storage for watersheds. Finally, identified events characterized abnormal decreases used climatological methods quantitatively describe severity, extent recovery these extremes. Additionally, evaluated influence various earth elastic structures on factors, demonstrated their advantageous contribution aligning observations. In conclusion, our introduces novel approach integrate retrievals, allowing characterization data-scarce regions, which cannot be achieved or individually. Moreover, results underscore potential benefits monitoring analysis effective resource management.

Язык: Английский

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

Hydrological Processes, Год журнала: 2024, Номер 38(4)

Опубликована: Март 26, 2024

Abstract Drought produces cross‐system impacts, and these interactions between multiple systems are also referred to as drought propagation. However, the complex natural processes anthropogenic disturbances lead propagation process being non‐linear feedback, which is still lack of knowledge in large‐scale basins. To address challenges, we propose a hydro‐economic coupled model investigate across meteorological‐hydrological‐agricultural systems. The results from Lancang‐Mekong River Basin show that propagates meteorological system hydrological weakened by basin buffer storage capacity. This shows spatial heterogeneity caused characteristics, highlighting upstream (CS location) downstream (KR KC locations) more prone vulnerability. As further agricultural system, water abstraction behaviours can alleviate situation, leading crop yield increases ranging 4.6% 39.2% through irrigation pathways. Unfortunately, behaviour worsens feedback loop, where VT (annual discharge decreases around 1346 m 3 /s) intense variation than LP almost 135 /s), illustrating among multi‐systems accumulation spatial. Moreover, hydropower use synergistic relationships, revealing efficient interventions positively mitigate impact on human well‐being. paper provides an in‐depth understanding nature‐human highly Lancang‐Mekong, may help policymakers managers better cope with drought.

Язык: Английский

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A novel GNSS and precipitation-based integrated drought characterization framework incorporating both meteorological and hydrological indicators

Remote Sensing of Environment, Год журнала: 2024, Номер 311, С. 114261 - 114261

Опубликована: Июнь 12, 2024

Язык: Английский

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GNSS Geodesy Quantifies Water‐Storage Gains and Drought Improvements in California Spurred by Atmospheric Rivers

Geophysical Research Letters, Год журнала: 2024, Номер 51(13)

Опубликована: Июль 2, 2024

Abstract Atmospheric rivers (ARs) deliver significant and essential precipitation to the western United States (US) with consequential interannual variability. The intensity frequency of ARs strongly influence reservoir levels, mountain snowpack, groundwater recharge, which are key drivers water‐resource availability natural hazards. Between October 2022 April 2023, states experienced exceptionally heavy from several families powerful ARs. Using observations surface‐loading deformation Global Navigation Satellite Systems, we find that terrestrial water‐storage gains exceeded 100% normal within vital California watersheds. Independent solutions derived different data‐analysis inversion methods provide an important measure precision. sustained storage increases, show closely associated at daily‐to‐weekly timescales, alleviated both meteorological hydrological drought conditions in region, a lag hydrological‐drought improvements. Quantifying recovery extreme after advances understanding increasingly variable hydrologic cycle.

Язык: Английский

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Hybrid GNSS time-series prediction method based on ensemble empirical mode decomposition with long short-term memory

Deleted Journal, Год журнала: 2025, Номер 7(1)

Опубликована: Янв. 8, 2025

Язык: Английский

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