Stronger Impact of Extreme Heat Event on Vegetation Temperature Sensitivity under Future Scenarios with High-Emission Intensity

Remote Sensing, Journal Year: 2024, Volume and Issue: 16(19), P. 3708 - 3708

Published: Oct. 5, 2024

Vegetation temperature sensitivity is a key indicator to understand the response of vegetation changes and predict potential shifts in ecosystem functions. However, under context global warming, impact future extreme heat events on remains poorly understood. Such research crucial for predicting dynamic terrestrial structure function. To address this issue, we utilized historical (1850–2014) (2015–2100) simulation data derived from CMIP6 models explore spatiotemporal dynamics different carbon emission scenarios. Moreover, employed correlation analysis assess sensitivity. The results indicate that exhibited declining trend period but yielded an increasing SSP245 SSP585 scenario was less pronounced than scenario. By contrast, upward until 2080 it began decline after SSP126 For all three scenarios, regions with high were predominantly located latitudes Northern Hemisphere, Tibetan Plateau, tropical forests. In addition, intensified intensity, particularly boreal forests Siberian permafrost. These findings provide important insights offer theoretical basis guidance identify climatically sensitive areas climate change.

Language: Английский

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Global Warming Is Likely Affecting Regional Drought Across Eurasia

AGU Advances, Journal Year: 2025, Volume and Issue: 6(1)

Published: Feb. 1, 2025

Abstract While rising global temperatures have altered drought risk and are projected to continue change large‐scale hydroclimate, it has proved difficult detect the influence of external factors on drought‐relevant variables at regional scales. In addition inherent difficulty in identifying signals noisy data, detection attribution studies generally rely general circulation models, which may fail accurately capture characteristics naturally forced internal hydroclimate variability. Here, we use a long tree‐ring based paleoclimate record estimate pre‐industrial variability Palmer Drought Severity Index (PDSI), commonly used metric risk. Using Bayesian framework, temporal spatial prior 1850. We assess whether observed twenty‐first century PDSI is compatible with this or better explained by response that scales mean temperature. Our results suggest warming likely contributed dry Eastern Europe, Mediterranean, Arctic Russia wet Northern East‐central Asia, Tibet.

Language: Английский

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Long-Term Impact of Extreme Weather Events on Grassland Growing Season Length on the Mongolian Plateau

Remote Sensing, Journal Year: 2025, Volume and Issue: 17(9), P. 1560 - 1560

Published: April 28, 2025

Quantifying extreme weather events (EWEs) and understanding their impacts on vegetation phenology is crucial for assessing ecosystem stability under climate change. This study systematically investigated the growing season length (GL) response to four types of EWEs—extreme heat, cold, wetness (surplus precipitation), drought (lack precipitation). The EWE extremity thresholds were found statistically using detrended long time series (2000–2022) ERA5 meteorological data through z-score transformation. analysis was based a grassland in Mongolian Plateau (MP) from 2000 2022. Using solar-induced chlorophyll fluorescence event coincidence analysis, we evaluated probability GL anomalies coinciding with EWEs assessed sensitivity variability. showed that 83.7% negative 87.4% positive associated one or more EWEs, (27.0%) heat (25.4%) contributing most. These findings highlight dominant role shaping phenological shifts. Negative strongly linked particularly arid cold regions where shortened season. Conversely, had greater influence warmer wetter areas, driving both lengthening shortening GL. Furthermore, background hydrothermal conditions modulated sensitivity, being susceptible stress drier vulnerable drought. emphasize importance regional variability characteristics provide new insights into how extremes impact semi-arid regions. Future research should explore human activities enhance predictions vegetation–climate interactions ecosystems MP.

Language: Английский

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Plant Responses to Anomalous Heat and Drought Events in the Sonoran Desert

Global Change Biology, Journal Year: 2025, Volume and Issue: 31(5)

Published: May 1, 2025

ABSTRACT A shift to greater aridification in dry regions of the world is ongoing and rapidly increasing intensity, including biodiverse Sonoran Desert Southwest United States northern Mexico. In addition experiencing over two decades drought, facing anomalous heat events that are frequency, evidenced a record hot period from 2020 2021. This article evaluates impacts 2020–2021 region‐wide drought event at three scales: (1) landscape level assessment ecosystem stress across entirety based on precipitation temperature data meteorological stations satellite‐derived vegetation health index (VHI), (2) assessments iconic columnar cacti succulent trees, (3) mechanistic plant responses extreme secondary biotic stressors insect attacks. was hottest driest year since 1980 region, health, determined VHI, also near its lowest point. Field‐based revealed high levels acute stress, cactus scorching, defined by rapid onset discolored photosynthetic tissue leads permanent dysfunction increased mortality. Tissue scorching corresponded with three‐fold increase mortality giant species region relative background following 2020–2021. Likewise, repeated surveys show persistent legacy anomaly, resulting marked reduction current survival saguaro ( Carnegiea gigantea ) Desert. multi‐scale previously desert plants shows landscape‐wide could fundamentally reshape populations these keystone communities depend them.

Language: Английский

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