An empirical seasonal prediction model of the east Asian summer monsoon using ENSO and NAO

An empirical seasonal prediction model of the east Asian summer monsoon using ENSO and NAO
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利用 ENSO 和 NAO 的东亚夏季风经验季节预测模型

DOI:
10.1029/2009jd011733
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发表时间:
2009-09
影响因子:
4.4
通讯作者:
Fei-fei Jin
Fei-fei Jin
中科院分区:
地球科学2区
文献类型:
--
作者:
吴志伟;Bin Wang;李建平;Fei-fei Jin

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(1)如何预测东亚夏季风的年际变化是气候预测中最具挑战性的重要课题之一。人们已经认识到,东亚夏季风的变化与厄尔尼诺或拉尼娜的发展和衰退密切相关,但并非完全相关。本文通过观测和数值试验结果表明,春季(4 - 5月)北大西洋涛动(NAO)异常可导致北大西洋出现一种持续到夏季的三极海温型,并激发欧亚北方副极地遥相关向下游发展,从而使乌拉尔山和鄂霍次克海的气压升高(或降低)。后者加强(或减弱)东亚副热带锋(梅雨-白乌-昌马),导致强(或弱)东亚夏季风。利用厄尔尼诺-南方涛动(ENSO)和春季北大西洋涛动(NAO)建立了一个预报东亚夏季风强度的经验模式。对1979-2006年期间进行了后报,这表明后报预测技巧与14个最先进的多模式集合后报相当。由于所有这些预测因素都可以很容易地进行真实的监控,因此该经验模型提供了一个真实的时间预测工具。
(1) How to predict the year-to-year variation of the east Asian summer monsoon (EASM) is one of the most challenging and important tasks in climate prediction. It has been recognized that the EASM variations are intimately but not exclusively linked to the development and decay of El Nino or La Nina. Here we present observed evidence and numerical experiment results to show that anomalous North Atlantic Oscillation (NAO) in spring (April-May) can induce a tripole sea surface temperature pattern in the North Atlantic that persists into ensuing summer and excite downstream development of subpolar teleconnections across the northern Eurasia, which raises (or lowers) the pressure over the Ural Mountain and the Okhotsk Sea. The latter strengthens (or weakens) the east Asian subtropical front (Meiyu-Baiu-Changma), leading to a strong (or weak) EASM. An empirical model is established to predict the EASM strength by combination of the El Nino-Southern Oscillation (ENSO) and spring NAO. Hindcast is performed for the 1979-2006 period, which shows a hindcast prediction skill that is comparable to the 14 state-of-the-art multimodel ensemble hindcast. Since all these predictors can be readily monitored in real time, this empirical model provides a real time forecast tool.
DOI: 10.1175/2009jcli2850.1
发表时间: 2009-07
期刊: Journal of Climate
影响因子: 4.9
作者:
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DOI: 10.1007/s00376-008-0387-8
发表时间: 2008-05
期刊: 大气科学进展(英文版)
影响因子: --
作者:
李建平;吴志伟
通讯作者: 吴志伟
DOI: 10.1175/1520-0469(1991)048
发表时间: 1991
影响因子: 3.1
作者:
W. Gallus;Richard H. Johnson
通讯作者: W. Gallus;Richard H. Johnson
DOI: 10.1007/s00382-007-0310-5
发表时间: 2008-05
期刊: Climate Dynamics
影响因子: 4.6
作者:
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DOI: 10.1142/9789812701411_0001
发表时间: 2004-11
期刊: --
影响因子: --
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通讯作者: Yihui Ding