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Ring widths of Rhododendron shrubs reveal a persistent winter warming in the central Himalaya
Panthi, Shankar; Fan, Ze-Xin; Brauning, Achim3
2021
Source PublicationDENDROCHRONOLOGIA
ISSN1125-7865
Volume65Issue:-Pages:-
AbstractHimalayan 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.
KeywordCentral Himalaya Climate change Dendroclimatology Rhododendron campanulatum Shrub rings Winter temperature
Subject AreaForestry ; Physical Geography
DOI10.1016/j.dendro.2020.125799
Indexed BySCI
Language英语
WOS IDWOS:000612307400002
Citation statistics
Document Type期刊论文
Identifierhttp://ir.xtbg.org.cn/handle/353005/12150
Collection2012年后新成立研究组
Affiliation1.Chinese Acad Sci, CAS Key Lab Trop Forest Ecol, Xishuangbanna Trop Bot Garden, Mengla 666303, Yunnan, Peoples R China
2.Chinese Acad Sci, Ctr Plant Ecol, Core Bot Gardens, Xishuangbanna 666303, Peoples R China
3.Chinese Acad Sci, Xishuangbanna Trop Bot Garden, Ailaoshan Stn Subtrop Forest Ecosyst Studies, Jingdong 676209, Yunnan, Peoples R China
4.Univ Erlangen Nurnberg, Inst Geog, D-91058 Erlangen, Germany
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GB/T 7714
Panthi, Shankar,Fan, Ze-Xin,Brauning, Achim. Ring widths of Rhododendron shrubs reveal a persistent winter warming in the central Himalaya[J]. DENDROCHRONOLOGIA,2021,65(-):-.
APA Panthi, Shankar,Fan, Ze-Xin,&Brauning, Achim.(2021).Ring widths of Rhododendron shrubs reveal a persistent winter warming in the central Himalaya.DENDROCHRONOLOGIA,65(-),-.
MLA Panthi, Shankar,et al."Ring widths of Rhododendron shrubs reveal a persistent winter warming in the central Himalaya".DENDROCHRONOLOGIA 65.-(2021):-.
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