来源:Scientific Reports 发布时间:2019/4/24 14:04:20
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自工业时代以来厄尔尼诺对南极温度的影响增加

论文标题:Increased influence of ENSO on Antarctic temperature since the Industrial Era

期刊:Scientific Reports

作者:Waliur Rahaman, Sourav Chatterjee, Tariq Ejaz, Meloth Thamban

发表时间:2019/04/12

数字识别码:10.1038/s41598-019-42499-x

原文链接:http://t.cn/EXDHoRM

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摘要:Under the influence of recent global warming, modulation of frequencies and amplitude of El Niño-Southern Oscillation (ENSO) and its impacts on global climate have become great concerns to the global community. Antarctic climate is sensitive to these changes owing to tropical and Southern Hemispheric (SH) teleconnections. Antarctic surface air temperature (SAT) reconstructed approximately for the past five centuries (~1533 to 1993 CE) based on multiple oxygen isotope (δ18O) records of ice cores from East and West Antarctica show dominant oscillations in ENSO and Pacific Decadal Oscillation (PDO) frequency bands. Further, variance of the East Antarctica (EA) temperature record shows significant increasing trend at ENSO band and decreasing trend at PDO band since the industrial era (~1850 CE). This observation is consistent with the earlier report of increasing ENSO activity, reconstructed based on tropical-subtropical tree ring records. ENSO influence in the SH high-latitude is known to be characterized by Pacific South American (PSA) pattern reflected in the atmospheric pressure fields. Our investigation of greenhouse gas (GHG) forced model simulation results show an increasing trend in PSA activity since the industrial era. Thus, we suggest ENSO activity and its influence on Antarctic temperature are increasing in response to increasing radiative GHG forcing since the industrial era.

阅读论文全文请访问:http://t.cn/EXDHoRM

期刊介绍:Scientific Reports (https://www.nature.com/srep/) is an online, open access journal from the publishers of Nature. We publish scientifically valid primary research from all areas of the natural and clinical sciences.

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(来源:科学网)

 
 
 
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