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Influence of solar wind energy flux on the interannual variability of ENSO in the subsequent year
He Shengping; Wang Huijun; Gao Yongqi; Li Fei; Li Hui; Wang Chi
Department空间科学部
Source Publication大气和海洋科学快报
2018
Volume11Issue:2Pages:165-172
ISSN1674-2834
Language英语
KeywordSolar Wind Energy Flux Enso Walker Circulation Enso
AbstractPrevious studies have tended to adopt the quasi-decadal variability of the solar cycle (e.g. sunspot number (SSN) or solar radio flux at 10.7 cm (F10.7) to investigate the effect of solar activity on El Nino-Southern Oscillation (ENSO). As one of the major terrestrial energy sources, the effect of solar wind energy flux in Earth's magnetosphere (E_(in)) on the climate has not drawn much attention, due to the big challenge associated with its quantitative estimation. Based on a new E_(in) index estimated by three-dimensional magnetohydrodynamic simulations from a previous study, this study reveals that E_(in) exhibits both quasi-decadal variability (periodic 11-year) and interannual (2-4 years) variability, which has rarely before been detected by SSN and F10.7. A significant interannual relationship between the annual mean E_(in) and subsequent early-winter ENSO is further revealed. Following high E_(in), the sea level pressure in the subsequent early winter shows significant positive anomalies from Asia southward to the Maritime Continent, and significant negative anomalies over the Southeast and Northeast Pacific, resembling the Southern Oscillation. Meanwhile, significant upper-level anomalous convergence and divergence winds appear over the western and eastern Pacific, which is configured with significant lower-level anomalous divergence and convergence, indicating a weakening of the Walker circulation. Consequently, notable surface easterly wind anomalies prevail over the eastern tropical Pacific, leading to El Nino-like sea surface temperature anomalies. It is suggested that better describing the processes in the solar wind-magnetosphere-ionosphere coupled system is essential to understand the solar influence on climate change.
Other Abstract作为地球系统的主要能量来源,进入地磁系统的太阳风能量通量(E_(in))一直难以估算。因此,E_(in)对气候的影响也没有得到广泛的研究。基于三维磁流体动力模拟估算的E_(in),本文指出,太阳风能量通量不仅存在准11年周期的年代际变率,同时还存在2-4年周期的年际变率。与以往主要关注太阳活动在年代际尺度上的气候效应的研究不同,本文揭示出太阳风能量通量与次年ENSO年际变率存在显著的联系。
Indexed ByCSCD
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Document Type期刊论文
Identifierhttp://ir.nssc.ac.cn/handle/122/6430
Collection空间科学部
Recommended Citation
GB/T 7714
He Shengping,Wang Huijun,Gao Yongqi,et al. Influence of solar wind energy flux on the interannual variability of ENSO in the subsequent year[J]. 大气和海洋科学快报,2018,11(2):165-172.
APA He Shengping,Wang Huijun,Gao Yongqi,Li Fei,Li Hui,&Wang Chi.(2018).Influence of solar wind energy flux on the interannual variability of ENSO in the subsequent year.大气和海洋科学快报,11(2),165-172.
MLA He Shengping,et al."Influence of solar wind energy flux on the interannual variability of ENSO in the subsequent year".大气和海洋科学快报 11.2(2018):165-172.
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