ArticleFrontiers in plant science2026
Pervasive seasonal divergence in lagged responses of vegetation growth to compound drought-heat stress on the Tibetan Plateau.
Article in Frontiers in plant science, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.
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1 citing paper in PubMed.
- Responses of stable vegetation to drought accumulation timescales and time lags in the Weihe River Basin.Frontiers in plant science · 2026Article
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6 authors.
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Abstract
Introduction: The Tibetan Plateau (TP) has experienced increasing frequency and intensity of compound drought-heat stress in recent decades accompanying global warming. However, the spatiotemporal pattern and the underlying factors contributing to vegetation growth responses to such compound stress remain poorly understood, particularly across seasons and vegetation types. Methods: In this study, monthly accumulated precipitation and maximum temperature data from the TerraClimate dataset were used to develop a Compound Drought-Heat Index (CDHI) in the period of 2000-2022. Vegetation growth responses to seasonal CDHI were then investigated using MODIS Normalized Difference Vegetation Index (MODIS/061/MOD13A1) data. Results: Our results reveal a distinct seasonal divergence in vegetation growth response to compound drought-heat stress. Specifically, approximately 61.57% of the TP exhibited a one-month lagged response to spring CDHI, whereas in summer, around 65.87% of the study region showed an almost immediate response. Vegetation in hotter and drier subregions of the TP exhibits a stronger positive correlation with compound drought-heat stress, and grasslands were more sensitive to compound drought-heat stress than forests. Spring precipitation, soil moisture, spring downward surface shortwave radiation, and spring CDHI exerted memory effects on both spring vegetation responses and subsequent summer vegetation responses to compound drought-heat stress. Discussion: These findings uncovered a widespread seasonal divergence in the lagged responses of vegetation growth to compound climate extremes and highlighted the importance of cross-seasonal interactions in understanding ecosystem vulnerability to intensifying extreme climate events.
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