Recent intensification of hydroclimatic change in the middle reaches of the Yangtz River Basin driven by PDO, ENSO and WPSH

Cai, Qiufang; Qian, Hengjun; Liu, Yu; Fang, Congxi; Zhang, Hanyu; Li, Qiang; Sun, Changfeng; Song, Huiming; Liu, Ruoshi; Sun, Junying

doi:10.1007/s00382-021-05990-8

Cited by 8 publications

(2 citation statements)

References 68 publications

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“…Further exploration of the effects of long‐lasting consecutive droughts and the underlying ecophysiological processes based on field experiments with rainfall reduction is urgently needed in the future. What is more, recent studies has reported the increasingly important effects of atmospheric circulations on the tree growth globally (Cai et al., 2022; Fang et al., 2021), particularly the North Atlantic Oscillation (NAO) (Dorado‐Liñán et al., 2022) and El Niño Southern‐Oscillation (ENSO) (St. George, 2014). For example, ENSO corresponds to a positive anomaly of sea surface temperature across the east‐central equatorial Pacific (Cai et al., 2021).…”

Section: Discussionmentioning

confidence: 99%

Enhanced growth resistance but no decline in growth resilience under long‐term extreme droughts

Wang,

Xu,

et al. 2023

Global Change Biology

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The frequency, intensity, and duration of extreme droughts, with devastating impacts on tree growth and survival, have increased with climate change over the past decades. Assessing growth resistance and resilience to drought is a crucial prerequisite for understanding the responses of forest functioning to drought events. However, the responses of growth resistance and resilience to extreme droughts with different durations across different climatic zones remain unclear. Here, we investigated the spatiotemporal patterns in growth resistance and resilience in response to extreme droughts with different durations during 1901–2015, relying on tree‐ring chronologies from 2389 forest stands over the mid‐ and high‐latitudinal Northern Hemisphere, species‐specific plant functional traits, and diverse climatic factors. The findings revealed that growth resistance and resilience under 1‐year droughts were higher in humid regions than in arid regions. Significant higher growth resistance was observed under 2‐year droughts than under 1‐year droughts in both arid and humid regions, while growth resilience did not show a significant difference. Temporally, tree growth became less resistant and resilient to 1‐year droughts in 1980–2015 than in 1901–1979 in both arid and humid regions. As drought duration lengthened, the predominant impacts of climatic factors on growth resistance and resilience weakened and instead foliar economic traits, plant hydraulic traits, and soil properties became much more important in both climatic regions; in addition, such trends were also observed temporally. Finally, we found that most of the Earth system models (ESMs) used in this study overestimated growth resistance and underestimated growth resilience under both 1‐year and 2‐year droughts. A comprehensive ecophysiological understanding of tree growth responses to longer and intensified drought events is urgently needed, and a specific emphasis should be placed on improving the performance of ESMs.

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Section: Discussionmentioning

confidence: 99%

Enhanced growth resistance but no decline in growth resilience under long‐term extreme droughts

Wang,

Xu,

et al. 2023

Global Change Biology

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“…Furthermore, studies that have considered multiple time scales have often focused on the monthly, seasonal, and annual scales, neglecting the pivotal interannual and interdecadal scales (Jia et al., 2015; Jiao et al., 2021; Robinson et al., 2013). Previous studies found that El Niño‐Southern Oscillation (ENSO), Pacific Interdecadal Oscillation (PDO), and Atlantic Interdecadal Oscillation (AMO), with interannual and decadal time scales during 3–7, 20–30, and 70–80 year, respectively, have significant impacts on both WA and GPP (Cai et al., 2022; Guo et al., 2023; He et al., 2022; Zhang, Dannenberg, et al., 2019). Consequently, there is a crucial need to explore the relationship between WA and GPP across various time scales, especially at the interannual and interdecadal time scales.…”

Section: Introductionmentioning

confidence: 99%

The strengthened impact of water availability at interannual and decadal time scales on vegetation GPP

Liang,

Zhang,

Wang

et al. 2024

Global Change Biology

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Water availability (WA) is a key factor influencing the carbon cycle of terrestrial ecosystems under climate warming, but its effects on gross primary production (EWA‐GPP) at multiple time scales are poorly understood. We used ensemble empirical mode decomposition (EEMD) and partial correlation analysis to assess the WA‐GPP relationship (RWA‐GPP) at different time scales, and geographically weighted regression (GWR) to analyze their temporal dynamics from 1982 to 2018 with multiple GPP datasets, including near‐infrared radiance of vegetation GPP, FLUXCOM GPP, and eddy covariance–light‐use efficiency GPP. We found that the 3‐ and 7‐year time scales dominated global WA variability (61.18% and 11.95%), followed by the 17‐ and 40‐year time scales (7.28% and 8.23%). The long‐term trend also influenced 10.83% of the regions, mainly in humid areas. We found consistent spatiotemporal patterns of the EWA‐GPP and RWA‐GPP with different source products: In high‐latitude regions, RWA‐GPP changed from negative to positive as the time scale increased, while the opposite occurred in mid‐low latitudes. Forests had weak RWA‐GPP at all time scales, shrublands showed negative RWA‐GPP at long time scales, and grassland (GL) showed a positive RWA‐GPP at short time scales. Globally, the EWA‐GPP, whether positive or negative, enhanced significantly at 3‐, 7‐, and 17‐year time scales. For arid and humid zones, the semi‐arid and sub‐humid zones experienced a faster increase in the positive EWA‐GPP, whereas the humid zones experienced a faster increase in the negative EWA‐GPP. At the ecosystem types, the positive EWA‐GPP at a 3‐year time scale increased faster in GL, deciduous broadleaf forest, and savanna (SA), whereas the negative EWA‐GPP at other time scales increased faster in evergreen needleleaf forest, woody savannas, and SA. Our study reveals the complex and dynamic EWA‐GPP at multiple time scales, which provides a new perspective for understanding the responses of terrestrial ecosystems to climate change.

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Winter–spring minimum temperature variations inferred from tree-ring δ13C in southeastern China

Li,

Zhou,

Zhang

et al. 2024

J. For. Res.

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Recent intensification of hydroclimatic change in the middle reaches of the Yangtz River Basin driven by PDO, ENSO and WPSH

Cited by 8 publications

References 68 publications

Enhanced growth resistance but no decline in growth resilience under long‐term extreme droughts

Enhanced growth resistance but no decline in growth resilience under long‐term extreme droughts

The strengthened impact of water availability at interannual and decadal time scales on vegetation GPP

Winter–spring minimum temperature variations inferred from tree-ring δ13C in southeastern China

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