Increased El Nino-Southern Oscillation sensitivity of tree growth on the southern Tibetan Plateau since the 1970s

作  者:Cheng XH, Lyu LX, Buntgen U, Cherubini P, Qiu HY, Zhang QB*
影响因子:3.601
刊物名称:International Journal of Climatology
出版年份:2019
卷:39  期:8  页码:3465-3475

论文摘要:

El Nino–Southern Oscillation (ENSO) affects various components of the Earth's climate systems but its role on the Tibetan Plateau remains poorly understood. Hydroclimatic changes in Asia's water tower can have substantial effects on the functioning and productivity of agricultural and natural ecosystems, and thus the wellbeing of many millions of people. Here, we use wellreplicated ringwidth chronologies from 10 juniper sites on the southern Tibetan Plateau to associate variations in tree growth with ENSO events between 1645 and 2001 CE. An empirical orthogonal function (EOF) was applied to emphasize regional growth coherency and climate sensitivity. May–June moisture availability was found to be most important for ringwidth formation, and most growth anomalies coincided with documentary evidence of hydroclimatic extremes. The superposed epoch analysis (SEA) and the composite analysis showed an increased ENSO sensitivity in tree growth on the southern Tibetan Plateau since the 1970s, possibly due to global warming, calls for integration of largescale ocean–atmosphere climate feedbacks into regional forest management strategies in future warming scenarios.

全文链接:https://rmets.onlinelibrary.wiley.com/doi/full/10.1002/joc.6032