气候变化领域集成服务门户(CCPortal): Contribution of winter precipitation to tree growth persists until the late growing season in the Karakoram of northern Pakistan

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DOI	10.1016/j.jhydrol.2022.127513
	Contribution of winter precipitation to tree growth persists until the late growing season in the Karakoram of northern Pakistan
	Huang, Ru; Zhu, Haifeng; Liang, Eryuan; Braeuning, Achim; Zhong, Linhao; Xu, Chenxi; Feng, Xiaoyu; Asad, Fayaz; Sigdel, Shalik Ram; Li, Lingcheng; Griessinger, Jussi
通讯作者	Zhu, HF (通讯作者)
发表日期	2022
ISSN	0022-1694
EISSN	1879-2707
卷号	607
英文摘要	Identifying the influence of seasonal source water on tree growth is essential to understand the effect of climate change on forest dynamics. However, due to the lack of available long-term monitoring studies, little is known on how long moisture originating from winter precipitation influences tree growth in the following growing season. Herein, we developed a tree-ring latewood oxygen isotope (delta O-18(LW)) chronology from the Karakoram (1955-2013) in northern Pakistan. We investigated whether winter climate signals are incorporated in the delta O-18(LW) and how long winter precipitation through soil moisture contributed to tree growth during the growing season. Significant correlations were found between delta O-18(LW) with both, winter to spring (January-May) temperature (r = 0.43, p < 0.05) and summer (July-August) precipitation (Local: r =-0.38, p < 0.05; Moisture source region: r =-0.44, p < 0.05). As shown by the cross-spectrum and commonality analysis, the climate signals in the delta O-18(LW) are frequency-dependent. Winter temperature signals stored in the delta O-18(LW) variations dominate at low frequencies more than 7 years (59% variance explained), while the summer precipitation signals dominate variations with higher frequencies shorter than 7 years (47% variance explained). Further analysis using reanalysis data shows that the growing season soil moisture at root depth (10-40 cm) is more strongly related to winter precipitation than to summer rainfall. Winter precipitation formed as ground snow provides root-zone soil moisture and tree growth via snowmelt during the growing season. Our study highlights that winter precipitation is the dominant water source contributing to Karakoram tree growth until the late growing season. Given the possibility of a decrease in winter precipitation under climate change in the Karakoram region, local forest is potentially threatened by the declining water supply during the growing season.
关键词	OXYGEN-ISOTOPE RATIOS SUMMER PRECIPITATION RING DELTA-O-18 CELLULOSE SIGNALS MONSOON CARBON CHINA EAST
英文关键词	Source water; Tree ring latewood; Stable oxygen isotope; Frequency dependence; Karakoram
语种	英语
WOS研究方向	Engineering ; Geology ; Water Resources
WOS类目	Engineering, Civil ; Geosciences, Multidisciplinary ; Water Resources
WOS记录号	WOS:000790573300006
来源期刊	JOURNAL OF HYDROLOGY
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/260701
推荐引用方式 GB/T 7714	Huang, Ru,Zhu, Haifeng,Liang, Eryuan,et al. Contribution of winter precipitation to tree growth persists until the late growing season in the Karakoram of northern Pakistan[J]. 中国科学院青藏高原研究所,2022,607.
APA	Huang, Ru.,Zhu, Haifeng.,Liang, Eryuan.,Braeuning, Achim.,Zhong, Linhao.,...&Griessinger, Jussi.(2022).Contribution of winter precipitation to tree growth persists until the late growing season in the Karakoram of northern Pakistan.JOURNAL OF HYDROLOGY,607.
MLA	Huang, Ru,et al."Contribution of winter precipitation to tree growth persists until the late growing season in the Karakoram of northern Pakistan".JOURNAL OF HYDROLOGY 607(2022).