Influence of ENSO on multi‐annual temperature variations at Hongyuan, NE Qinghai‐Tibet plateau: evidence from δ13C of spruce tree rings
Influence of ENSO on multi‐annual temperature variations at Hongyuan, NE Qinghai‐Tibet plateau: evidence from δ13C of spruce tree rings
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DOI：
10.1002/joc.1877
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发表时间：
2010-01
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影响因子：
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通讯作者：
Hai Xu;Yetang Hong;B. Hong;Yongxuan Zhu;Yu Wang
中科院分区：
文献类型：
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作者：
Hai Xu;Yetang Hong;B. Hong;Yongxuan Zhu;Yu Wang
ENSO对全球气温变化的影响已引起广泛关注。然而，在不同季风盛行的地区，人们对这种影响知之甚少。在印度夏季风（ISM）主导的若尔盖高原红原地区，我们测量了云杉（picea likiangensis var. rubescens）的δ13C，重建了270年来的温度变化。若尔盖高原δ13Ctreering推断的温度变化在多年时间尺度上与Niño3地区（简称SSTANiño3）海表温度（SST）异常呈反遥相关，该异常被广泛用作“El Niño-South涛动”（ENSO）的指示因子。我们推测ENSO可能通过影响ISM的强度来调节区域表面温度，ISM的强度影响暖湿气团流入研究区域，进而改变潜热。在多年尺度上，SSTANiño3高（低）时，ISM弱（强），季风降水减少（增加），潜热减弱（加强），地表气温降低（升高）。版权所有©2009英国皇家气象学会
Influence of ENSO on global temperature variations has aroused wide attention. However, little is known about this effect at regions where different monsoons prevail. In this study, we measured δ13C of spruce trees (picea likiangensis var. rubescens) and reconstructed temperature variations during the past 270 years at Hongyuan, the Zoige plateau where Indian summer monsoon (ISM) dominates. Temperature variation inferred from δ13Ctreering at the Zoige plateau shows anti‐teleconnection on multi‐annual timescales to the sea‐surface temperature (SST) anomaly in the Niño3 region (SSTANiño3 for short) which has been widely used as an indicator of the “El Niño–South Oscillation” (ENSO). We speculate that the ENSO may modulate the regional surface temperature by influencing the intensity of the ISM, which affects the influx of warm/moist air mass to the study region and subsequently changes the latent heating. On multi‐annual scales, when the SSTANiño3 is high (low), the ISM is weak (strong), monsoon precipitation decreases (increase), the latent heating is weakened (strengthened) and surface air temperature is lower (higher). Copyright © 2009 Royal Meteorological Society