Contrasting Drought Propagation Into the Terrestrial Water Cycle Between Dry and Wet Regions

Li, Wantong; Reichstein, Markus; Sungmin, O; May, Conrad; Destouni, Georgia; Migliavacca, Mirco; Kraft, Basil; Weber, Ulrich; Orth, René

doi:10.1029/2022ef003441

Cited by 15 publications

(5 citation statements)

References 81 publications

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“…With regard to study scale, other studies have noted that current large‐scale hydrological models often do not adequately account for heterogeneity while important gaps also remain in effectively integrating new methodologies into Earth System models and for such models to accurately represent terrestrial water variations and patterns around the world (Ghajarnia et al., 2021; Li et al., 2023). As a possible means for research to bridge such scale gaps, we have here considered and distinguished GSW studies of multiple catchments as a special study scale, considering that such studies could capture both smaller‐scale variations (heterogeneity) among individual catchments in different parts of the world, and average large‐scale continental‐global behavior by spatial aggregation of many catchments.…”

Section: Discussion Of Research Gaps and Prioritiesmentioning

confidence: 99%

“…Terrestrial water, including both its groundwater and its surface water parts, interacts crucially with other natural geosystems at large scales. Water‐related large‐scale land‐atmosphere interactions are essential for climate conditions (Seneviratne et al., 2010), water‐system manifestations of weather extremes such as droughts (Li et al., 2023), and freshwater availability for different human and ecosystem uses (Althoff & Destouni, 2023). Large‐scale terrestrial water interactions with the coastal ocean and its ongoing and forthcoming changes are also involved in key societal and environmental challenges such as; (a) seawater intrusion into the freshwater resources of coastal areas (Ferguson & Gleeson, 2012), which host a large part of the global human population with average population densities nearly three times higher than the global average density (Small & Nicholls, 2003); and (b) freshwater discharges, including submarine groundwater discharge, carrying excess nutrient and pollutant loads into coastal and marine waters (Sawyer et al., 2016) with severe impacts on their biogeochemistry (Santos et al., 2021) and ecosystem health (Rabalais et al., 2010).…”

Section: Introductionmentioning

confidence: 99%

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Research Gaps and Priorities for Terrestrial Water and Earth System Connections From Catchment to Global Scale

Zarei,

Destouni

2024

Earth's Future

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The out‐of‐sight groundwater and visible but much less extensive surface waters on land constitute a linked terrestrial water system around the planet. Research is crucial for our understanding of these terrestrial water system links and interactions with other geosystems and key challenges of Earth System change. This study uses a scoping review approach to discuss and identify topical, methodological and geographical gaps and priorities for research on these links and interactions of the coupled ground‐ and surface water (GSW) system at scales of whole‐catchments or greater. Results show that the large‐scale GSW system is considered in just a small part (0.4%–0.8%) of all studies (order of 105 for each topic) of either groundwater or surface water flow, storage, or quality at any scale. While relatively many of the large‐scale GSW studies consider links with the atmosphere or climate (8%–43%), considerably fewer address links with: (a) the cryosphere or coastal ocean as additional interacting geosystems (5%–9%); (b) change drivers/pressures of land‐use, water use, or the energy or food nexus (2%–12%); (c) change impacts related to health, biodiversity or ecosystem services (1%–4%). Methodologically, use of remote sensing data and participatory methods is small, while South America and Africa emerge as the least studied geographic regions. The paper discusses why these topical, methodological and geographical findings indicate important research gaps and priorities for the large‐scale coupled terrestrial GSW system and its roles in the future of the Earth System.

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Section: Discussion Of Research Gaps and Prioritiesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Research Gaps and Priorities for Terrestrial Water and Earth System Connections From Catchment to Global Scale

Zarei,

Destouni

2024

Earth's Future

Self Cite

View full text Add to dashboard Cite

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“…Plant hydraulic traits determine their water saving strategies under drought or heat waves, with conservative plants closing or partially closing stomata to reduce evaporation until the next precipitation event. Therefore, the high resistance of vegetation to drought or heat waves reduces mortality risks and maintains the other ecosystem services such as atmospheric water demand and runoff recharge (Teuling et al 2010, Li et al 2023b.…”

Section: Regulation Of the Global Carbon And Water Cycles Through Veg...mentioning

confidence: 99%

Regulation of the global carbon and water cycles through vegetation structural and physiological dynamics

Li,

Duveiller,

Wieneke

et al. 2024

Environ. Res. Lett.

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Vegetation plays an essential role in regulating carbon and water cycles, e.g. by taking up atmospheric CO2 through photosynthesis and by transferring soil water to the atmosphere through transpiration. Vegetation function is shaped by its structure and physiology: vegetation structure is determined by the amount of materials for plants and how it is organised in space and time, while vegetation physiology controls the instantaneous response of vegetation function to environmental conditions. Recognizing and disentangling these aspects of vegetation is key to understanding and predicting the response of the terrestrial biosphere to global change. This is now possible, as comprehensive measurements from Earth observations, both from satellites and the ground, provide invaluable data and information. This review introduces and describes vegetation structure and physiology, and summarises, compares, and contextualises recent literature to illustrate the state of the art in monitoring vegetation dynamics, quantifying large-scale vegetation physiology, and investigating vegetation regulation on the changes of global carbon and water fluxes. This includes results from remote sensing, in-situ measurements, and model simulations, used either to study the response of vegetation structure and physiology to global change, or to study the feedback of vegetation to global carbon and water cycles. We find that observation-based work is underrepresented compared with model-based studies. We therefore advocate further work to make better use of remote sensing and in-situ measurements, as they promote the understanding of vegetation dynamics from a fundamental data-driven perspective. We highlight the usefulness of novel and increasing satellite remote sensing data to comprehensively investigate the structural and physiological dynamics of vegetation on the global scale, and to infer their influence on the land carbon sink and terrestrial evaporation. We argue that field campaigns can and should complement large-scale analyses together with fine spatio-temporal resolution satellite remote sensing to infer relevant ecosystem-scale processes.

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“…Deo and Sahin (2015) used the extreme learning machine algorithm to assess and predict drought in eastern Australia. Li et al (2023) used independent gridded datasets based on machine learning-assisted upscaling of satellite and in situ observations compared drought propagation in arid and humid regions. Jiang et al (2023) coupling the machine learning model and C-vine copula studied the drought propagation probability from meteorological drought to ecological drought.…”

Section: Extension and Limitationmentioning

confidence: 99%

A new perspective for assessing hydro-meteorological drought relationships at large scale based on causality analysis

Zhou,

Ding,

Zhao

et al. 2023

Environ. Res. Lett.

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Correlation analysis is the common method to evaluate the relationship between two variables; however, it may sometimes cause spurious correlations. Specifically, in the field of hydrometeorology, with the impacts of climate change and human activities, correlation analysis is difficult to identify the true relationship between variables, and thus, causality analysis should be adopted instead. This study analyzed the causal relationship between meteorological drought and hydrological drought in different climatic regions of China by using convergent cross mapping (CCM). We improved the identification of CCM convergence by using the coefficient of variation and applied it in the field of large-scale hydrometeorology. The results of correlation analysis were compared, and the applicability of causality analysis was explored. The results revealed that: In Southeast China, the correlation and causality between meteorological drought and hydrological drought were both large. In Northeast China and central Qinghai–Tibet Plateau, the correlation between meteorological drought and hydrological drought was small, but the causality was large. In view of the spurious correlation, introducing causality analysis can better explain the relationship between meteorological drought and hydrological drought, especially in areas with snowmelt runoff. Overall, CCM can provide valuable causal information from common time series in the field of large-scale hydrometeorology and has a wide range of application values. However, causality analysis cannot explain the positive or negative relationship between variables. Therefore, when analyzing the relationship between variables, the advantages of the two methods should be given full play.

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Contrasting Drought Propagation Into the Terrestrial Water Cycle Between Dry and Wet Regions

Cited by 15 publications

References 81 publications

Research Gaps and Priorities for Terrestrial Water and Earth System Connections From Catchment to Global Scale

Research Gaps and Priorities for Terrestrial Water and Earth System Connections From Catchment to Global Scale

Regulation of the global carbon and water cycles through vegetation structural and physiological dynamics

A new perspective for assessing hydro-meteorological drought relationships at large scale based on causality analysis

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