气候变化领域集成服务门户(CCPortal): Unexpected climate variability inferred from a 380-year tree-ring earlywood oxygen isotope record in the Karakoram, Northern Pakistan

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DOI	10.1007/s00382-021-05736-6
	Unexpected climate variability inferred from a 380-year tree-ring earlywood oxygen isotope record in the Karakoram, Northern Pakistan
	Zhu H.; Huang R.; Asad F.; Liang E.; Bräuning A.; Zhang X.; Dawadi B.; Man W.; Grießinger J.
发表日期	2021
ISSN	0930-7575
起始页码	2547
结束页码	2571
英文摘要	To provide a long-term context for understanding the “Karakoram Anomaly” in recent glacier studies, we originally aimed to develop an annually resolved multi-century winter–spring precipitation record using tree-ring earlywood cellulose δ18O (δ18OEW) of Pinus wallachina from the Karakoram, northern Pakistan. Out of expectation, winter (January–May) temperature rather than precipitation is found to be the dominant climate signal (r = 0.63, p < 0.01, 1955–2013) stored in the δ18OEW chronology. Precipitation signals mainly appear at high-frequency variations, but weaker than temperature signal. We reconstructed January–May temperature back to 1631 with an explained variance of 39.7 % during the calibration period of 1955–2013. The reconstruction reveals that the Little Ice Age (LIA) was 0.94 °C warmer during 1647–1746 than the twentieth century (1900–1999). These warmer conditions are additionally validated by ice-core δ18O data from the Kunlun Mountains of High Asia and the northern North America. The eastward Polar Vortex and enhanced mid-latitude Westerlies on the Euro-Asia continent may be a possible explanation of a spatial coherency of LIA temperature between the Karakoram and the northern North America. Although not the original aim of this study, we provide evidence that the attribution of anomalous behavior of Karakoram glaciers in a long-term context may be misled when using precipitation reconstructions derived from tree-ring oxygen isotope. © 2021, The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.
英文关键词	Karakoram; Little Ice Age; Oxygen isotopes; Tree‐rings; Winter‐spring temperature reconstruction
来源期刊	Climate Dynamics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/183529
作者单位	Key Laboratory of Alpine Ecology, Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing, 100101, China; CAS Center for Excellence in Tibetan Plateau Earth Sciences, Beijing, 100101, China; University of Chinese Academy of Sciences, Beijing, 10049, China; Institute of Geography, Friedrich-Alexander-University of Erlangen-Nuremberg, Erlangen, 91058, Germany; Department of Botany, Bacha Khan University Charsadda, Charsadda, KPK, Pakistan; Key Laboratory of Land Surface Pattern and Simulation, Institute of Geographical Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, 100101, China; Central Department of Hydrology and Meteorology, Tribhuvan University Kirtipur, Kathmandu, Nepal; State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics (LASG), Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China
推荐引用方式 GB/T 7714	Zhu H.,Huang R.,Asad F.,et al. Unexpected climate variability inferred from a 380-year tree-ring earlywood oxygen isotope record in the Karakoram, Northern Pakistan[J],2021.
APA	Zhu H..,Huang R..,Asad F..,Liang E..,Bräuning A..,...&Grießinger J..(2021).Unexpected climate variability inferred from a 380-year tree-ring earlywood oxygen isotope record in the Karakoram, Northern Pakistan.Climate Dynamics.
MLA	Zhu H.,et al."Unexpected climate variability inferred from a 380-year tree-ring earlywood oxygen isotope record in the Karakoram, Northern Pakistan".Climate Dynamics (2021).