气候变化领域集成服务门户(CCPortal): Ring widths of Rhododendron shrubs reveal a persistent winter warming in the central Himalaya

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DOI	10.1016/j.dendro.2020.125799
	Ring widths of Rhododendron shrubs reveal a persistent winter warming in the central Himalaya
	Panthi S.; Fan Z.-X.; Bräuning A.
发表日期	2021
ISSN	11257865
卷号	65
英文摘要	Himalayan Mountains provide unique opportunities for the extension of shrub-ring based dendroclimatology beyond the upper tree limit. However, little is known about limiting climate factors of shrub growth under harsh environmental conditions. We established a new ring-width chronology of a Himalayan shrub rhododendron (Rhododendron campanulatum D. Don) at the upper Krummholz treeline in the Mt. Gaurishankar massif, central Himalaya, Nepal. Bootstrapped correlation analysis showed positive relationships between radial growth and temperatures of all months from previous November to current October. Correlations were the highest with winter (December-February) minimum temperature (r = 0.781, p < 0.001), indicating that radial growth of R. campanulatum is strongly sensitive to winter minimum temperature. The linear regression model explained 61 % of the actual winter minimum temperature variance during the calibration period 1960–2013. Periods of low and high minimum winter temperatures in the central Himalaya were consistent with cool and warm episodes found by other regional winter temperature reconstructions from the Himalayas and the Tibetan Plateau. Spatial correlation analysis with land surface temperatures revealed the spatial representativeness of our reconstruction for a larger geographical territory over the Himalayas and the Tibetan Plateau. Furthermore, winter temperature in the central Himalaya is teleconnected with the December-February India-Burma trough. The persistent increasing winter temperature in recent decades in the central Himalaya coincides with continental-scale warming. Alpine vegetation in humid regions of the Himalayas may benefit from winter warming via an earlier start and extension of the growing season, as long as moisture availability is sufficient. © 2020
英文关键词	Central Himalaya; Climate change; Dendroclimatology; Rhododendron campanulatum; Shrub rings; Winter temperature
语种	英语
scopus关键词	Dendrochronologia
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/158308
作者单位	CAS Key Laboratory of Tropical Forest Ecology; Xishuangbanna Tropical Botanical Garden; Chinese Academy of Sciences; Menglun; Mengla; Yunnan 666303; China; Center for Plant Ecology; Core Botanical Gardens; Chinese Academy of SciencesXishuangbanna 666303; China; Ailaoshan Station of Subtropical Forest Ecosystem Studies; Xishuangbanna Tropical Botanical Garden; Chinese Academy of Sciences; Jingdong; Yunnan 676209; China; Institute of Geography; University of Erlangen-Nürnberg; Erlangen; 91058; Germany
推荐引用方式 GB/T 7714	Panthi S.,Fan Z.-X.,Bräuning A.. Ring widths of Rhododendron shrubs reveal a persistent winter warming in the central Himalaya[J],2021,65.
APA	Panthi S.,Fan Z.-X.,&Bräuning A..(2021).Ring widths of Rhododendron shrubs reveal a persistent winter warming in the central Himalaya.,65.
MLA	Panthi S.,et al."Ring widths of Rhododendron shrubs reveal a persistent winter warming in the central Himalaya".65(2021).