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DOI	10.1007/s00484-024-02647-z
	Drought, temperature, and moisture availability: understanding the drivers of isotopic decoupling in native pine species of the Nepalese Himalaya
	Aryal, Sugam; Griessinger, Jussi; Gaire, Narayan Prasad; Bhattarai, Tribikram; Braeuning, Achim
发表日期	2024
ISSN	0020-7128
EISSN	1432-1254
起始页码	68
结束页码	6
卷号	68 期号:6
英文摘要	The Himalayas experienced long-term climate changes and recent extreme weather events that affected plant growth and the physiology of tree species at high-elevation sites. This study presents the first statistically robust delta 18OTR chronologies for two native pine species, Pinus roxburghii, and Pinus wallichiana, in the lower Nepalese Himalaya. The isotope chronologies exhibited 0.88 parts per thousand differences in overall mean isotope values attributed to varying elevations (460-2000 m asl). Comparative analysis of climate response using data sets from different sources and resolutions revealed the superiority of the APHRODITE (Asian Precipitation - Highly-Resolved Observational Data Integration Towards Evaluation) data set calibrated for the South Asian Summer Monsoon (SASM)-dominated region. Both species exhibited negative correlations with monsoon precipitation and positive correlations with temperature. However, during the peak monsoon season (July-August), daily resolved climate data disentangled statistically insignificant relationships, and revealed that delta 18OTR is influenced by atmospheric moisture. Both congeneric species showed a decoupling between the chronologies after 1995. However, no significant change in air moisture origin and monsoon regime between the study sites was observed, indicating a consistent dominant moisture source during different monsoon seasons. Besides, we also observed the decreased inter-series correlation of both delta 18OTR chronologies after 1995, with P. wallichiana experiencing a steeper decrease than P. roxburghii. The weakening correlations between and within the chronologies coincided with a regional drought during 1993-1995 in both sites, highlighting the strong regulation of local climate on the impact of regional extreme climate events. Our findings emphasise the importance of employing climate data with optimal spatial and temporal resolution for improved delta 18OTR-climate relationships at the intra-annual scale while considering the influence of site-specific local environmental conditions. Assessing climate data sets with station data is vital for accurately interpreting climate change's impact on forest response and long-term climate reconstructions.
英文关键词	Stable oxygen isotopes; Native pine species; Nepalese Himalaya; Precipitation; Temperature; Isotopic decoupling; Local environmental effects
语种	英语
WOS研究方向	Biophysics ; Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences ; Physiology
WOS类目	Biophysics ; Environmental Sciences ; Meteorology & Atmospheric Sciences ; Physiology
WOS记录号	WOS:001174280700001
来源期刊	INTERNATIONAL JOURNAL OF BIOMETEOROLOGY
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/290856
作者单位	University of Erlangen Nuremberg; Salzburg University; Tribhuvan University
推荐引用方式 GB/T 7714	Aryal, Sugam,Griessinger, Jussi,Gaire, Narayan Prasad,et al. Drought, temperature, and moisture availability: understanding the drivers of isotopic decoupling in native pine species of the Nepalese Himalaya[J],2024,68(6).
APA	Aryal, Sugam,Griessinger, Jussi,Gaire, Narayan Prasad,Bhattarai, Tribikram,&Braeuning, Achim.(2024).Drought, temperature, and moisture availability: understanding the drivers of isotopic decoupling in native pine species of the Nepalese Himalaya.INTERNATIONAL JOURNAL OF BIOMETEOROLOGY,68(6).
MLA	Aryal, Sugam,et al."Drought, temperature, and moisture availability: understanding the drivers of isotopic decoupling in native pine species of the Nepalese Himalaya".INTERNATIONAL JOURNAL OF BIOMETEOROLOGY 68.6(2024).