Increasing atmospheric dryness reduces boreal forest tree growth

Nature Communications, Journal Year: 2023, Volume and Issue: 14(1)

Published: Oct. 30, 2023

Rising atmospheric vapour pressure deficit (VPD) associated with climate change affects boreal forest growth via stomatal closure and soil dryness. However, the relationship between VPD depends on climatic context. Here we assess Canadian responses to changes from 1951-2018 using a well-replicated tree-growth increment network approximately 5,000 species-site combinations. Of 3,559 successful models, observed concurrent summer in one-third of combinations, prior almost half those The previous year current was exclusively negative, while also tended reduce growth. Tree species, age, annual temperature, moisture primarily determined tree responses. Younger trees species like white spruce Douglas fir exhibited higher sensitivity, as did areas high temperature low moisture. Since 1951, increases Canada have paralleled decreases, particularly species. Accelerating dryness decades ahead will impair carbon storage societal-economic services.

Language: Английский

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Functional relationships reveal differences in the water cycle representation of global water models

Nature Water, Journal Year: 2023, Volume and Issue: 1(12), P. 1079 - 1090

Published: Nov. 27, 2023

Language: Английский

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Drought offsets the vegetation greenness-induced gross primary productivity from 1982 to 2018 in China

Journal of Hydrology, Journal Year: 2024, Volume and Issue: 632, P. 130881 - 130881

Published: Feb. 16, 2024

Language: Английский

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Water constraints enhanced by revegetation while alleviated by increased precipitation on China’s water-dominated Loess Plateau

Journal of Hydrology, Journal Year: 2024, Volume and Issue: 640, P. 131731 - 131731

Published: July 31, 2024

Language: Английский

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The variability in sensitivity of vegetation greenness to climate change across Eurasia

Ecological Indicators, Journal Year: 2024, Volume and Issue: 163, P. 112140 - 112140

Published: May 16, 2024

Climate change is one of dominators driving the greening vegetation worldwide, which expected to enhance land carbon sink and mitigate global warming. The sensitivity greenness climate fluctuant regulated by other environmental factors. However, drivers mechanisms behind remain unclear so far. Here, we hired long-term satellite-based index (NDVI), climatic variables, nitrogen deposition, atmospheric CO2 records investigate variations its across Eurasia. To obtain timeseries temperature (γNDVITEM) precipitation (γNDVIPRE), applied multi-regression models regressed on NDVI in each 9-year moving windows. results showed that area limited low temperatures substantially shrunk, while deficit increased during 1982–2015. Specifically, significantly decreasing γNDVITEM γNDVIPRE accounted for 29.8% 20.1%, respectively, remarkably increasing about 18.2% 24.5%, vegetated lands Declining was widely observed most biomes, including tropical subtropical moist broadleaf forests, temperate mixed coniferous croplands, deserts xeric shrublands. Substantially merely found montane grasslands shrublands, dry nonlinear regimes proved biome types. Spatially, rather than elevated factors (temperature, precipitation, radiation) jointly dominated nearly 45% 48% Eurasia respectively. Our uncovered apparent pattern changes highlighted necessity unfold underlying based plant physiology traits.

Language: Английский

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Assessing the field-scale crop water condition over an intensive agricultural plain using UAV-based thermal and multispectral imagery

Journal of Hydrology, Journal Year: 2025, Volume and Issue: unknown, P. 132966 - 132966

Published: Feb. 1, 2025

Language: Английский

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Contrasting Trends in Onset of Spring Green‐Up Between Grasslands and Forests in China

Earth s Future, Journal Year: 2025, Volume and Issue: 13(3)

Published: March 1, 2025

Abstract Spring vegetation phenology (green‐up onset date, GUD) exhibits notable sensitivity to climate change, serving as a critical indicator of ecosystem dynamics. However, long‐term changes and drivers GUD remain unclear. Here we showed that satellite‐derived averaged over China forests grasslands advanced by −1.3 ± 0.4 (mean SD) days decade −1 during 1982–2022, but with contrasting trends between (−5.0 0.6 ) (2.8 ), despite similarly increasing temperature precipitation. Such were caused different responses higher preseason mean more total Moreover, sensitivities precipitation patterns respect spatial gradient background conditions grasslands. Our study elucidates mechanisms behind responding which could help optimize land‐management strategies anticipate distribution under change.

Language: Английский

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Decreasing dynamic predictability of global agricultural drought with warming climate

Nature Climate Change, Journal Year: 2025, Volume and Issue: unknown

Published: March 17, 2025

Language: Английский

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Past and future adverse response of terrestrial water storages to increased vegetation growth in drylands

npj Climate and Atmospheric Science, Journal Year: 2023, Volume and Issue: 6(1)

Published: Aug. 11, 2023

Abstract The response of terrestrial water storages to dryland vegetation growth remains poorly understood. Using multiple proxies from satellite observations and model outputs, we show an overall increase (decrease) in (terrestrial storages) across drylands globally during 1982–2016. Terrestrial greening correlate negatively with growth, particularly for cropland-dominated regions, such is pronounced when the rate productivity high. Reduction storage dominated by precipitation evapotranspiration variability rather than runoff. We predict reduction 41–84% 2100, accompanying expansion 4.1–10.6%. Our findings, which indicate sustained adverse drylands, highlight need concerted planning balanced ecological restoration, agricultural management, resource utilization that will affect 5.17 billion people, 64% whom live developing countries.

Language: Английский

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Timing and magnitude of drought impacts on carbon uptake across a grassland biome

Global Change Biology, Journal Year: 2023, Volume and Issue: 29(10), P. 2790 - 2803

Published: Feb. 16, 2023

Although drought is known to negatively impact grassland functioning, the timing and magnitude of these impacts within a growing season remain unresolved. Previous small-scale assessments indicate grasslands may only respond during narrow periods year; however, large-scale are now needed uncover general patterns determinants this timing. We combined remote sensing datasets gross primary productivity weather assess responses at 5 km2 temporal resolution across two expansive ecoregions western US Great Plains biome: C4 -dominated shortgrass steppe C3 northern mixed prairies. Across over 700,000 pixel-year combinations covering more than 600,000 , we studied how driest years between 2003-2020 altered daily bi-weekly dynamics carbon (C) uptake. Reductions C uptake intensified into early summer peaked in mid- late June both ecoregions. Stimulation spring was small insufficient compensate for losses summer. Thus, total consistently reduced by ecoregions; reductions were twice as large southern warmer steppe. biome, increased vapor pressure deficit (VPD) strongly linked peak vegetation greenness drought. Rising VPD will likely exacerbate Plains, with greatest warmest months locations. High spatiotemporal analyses response areas provide generalizable insights new opportunities basic applied ecosystem science water-limited amid climate change.

Language: Английский

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