西伯利亚强高压事件的前兆大气遥相关型

IF 2.3 4区 地球科学 Q3 METEOROLOGY & ATMOSPHERIC SCIENCES
Jian Song , Ning Shi , Qilei Huang
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The significant signal of the POL type is a gradual southward movement of anticyclonic anomalies from the North Pole. In terms of the impact on SAT in East Asia, the SCA type and POL type are similar since they can cause a wide range of cold anomalies in East Asia. However, the cold anomalies caused by the POL type in northern China show significant signals earlier. 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引用次数: 0

摘要

基于日本55年逐日再分析资料,研究发现,强西伯利亚高压(SH)发生前存在斯堪的纳维亚(SCA)型、西太平洋(WP)型和极地/欧亚(POL)型三种远相关型。因此,强SH事件分为三种类型。综合结果表明,三种类型的典型环流特征及其对东亚地区地面气温的影响存在明显差异。SCA型的特征是中高纬度欧亚大陆上空的波列异常,而WP型的特征是北太平洋西部/远东下游的环流异常向西扩展。POL型的重要信号是反气旋异常从北极逐渐向南移动。在对东亚SAT的影响方面,SCA类型和POL类型相似,因为它们可以引起东亚大范围的冷异常。然而,由POL型引起的中国北方冷异常较早地显示出明显的信号。WP型仅引起中国北部和东部的温和冷异常,但SAT异常的持续是明显的。摘要本文利用日本55年逐日再分析资料,发现在SH异常增强前,有三种不同的大气遥相关型前兆信号,即斯堪的纳维亚(SCA)型,西太平洋(WP)型,极地——欧亚(POL)型。【中文译文】合成结果表明, 三类事件在典型环流特征和对东亚气温的影响上存在着明显的不同. 具体而言,SCA类事件主要表现为在欧亚中高纬度上自西向东的波列异常,WP类事件表现为环流异常自下游太平洋/俄罗斯远东地区向西发展的特征,波尔型事件的显著信号则来源于自极区向南移动的反气旋式环流异常。在对东亚地表气温的影响上,SCA类与波尔类事件类似,它们均可造成大范围的低温异常。齐泽尔:齐泽尔,齐泽尔,齐泽尔,齐泽尔,齐泽尔,齐泽尔,齐泽尔,齐泽尔,齐泽尔,齐泽尔,齐泽尔
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Precursory atmospheric teleconnection patterns for strong Siberian High events

Precursory atmospheric teleconnection patterns for strong Siberian High events

Based on Japanese 55-year daily reanalysis data, the present study reveals that a strong Siberian high (SH) is preceded by three teleconnection patterns—namely, the Scandinavian (SCA) pattern, western Pacific (WP) pattern, and Polar/Eurasian (POL) pattern. Accordingly, strong SH events are classified into three types. Composite results show that there are evident differences among the three types in their typical circulation characteristics and impacts on surface air temperature (SAT) in East Asia. The SCA type is characterized by a wave-train anomaly over mid- and high-latitude Eurasia, while the WP type is characterized by a western expansion of circulation anomalies from the downstream western North Pacific/Far East. The significant signal of the POL type is a gradual southward movement of anticyclonic anomalies from the North Pole. In terms of the impact on SAT in East Asia, the SCA type and POL type are similar since they can cause a wide range of cold anomalies in East Asia. However, the cold anomalies caused by the POL type in northern China show significant signals earlier. The WP type causes only modest cold anomalies over northern and eastern China, but the persistence of SAT anomalies is obvious.

摘要

本文利用日本55年逐日再分析资料, 发现在SH异常增强前, 有三种不同的大气遥相关型前兆信号, 即斯堪的纳维亚 (SCA) 型, 西太平洋 (WP) 型, 极地-欧亚 (POL) 型. 据此, 本文将异常增强的SH分为对应的三类事件. 合成结果表明, 三类事件在典型环流特征和对东亚气温的影响上存在着明显的不同. 具体而言, SCA类事件主要表现为在欧亚中高纬度上自西向东的波列异常, WP类事件表现为环流异常自下游太平洋/俄罗斯远东地区向西发展的特征, POL型事件的显著信号则来源于自极区向南移动的反气旋式环流异常. 在对东亚地表气温的影响上, SCA类与POL类事件类似, 它们均可造成大范围的低温异常. 而WP类仅在我国北方和东部地区造成强度较弱的地表气温异常, 但该异常的持续性特征较明显.

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来源期刊
Atmospheric and Oceanic Science Letters
Atmospheric and Oceanic Science Letters METEOROLOGY & ATMOSPHERIC SCIENCES-
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4.20
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8.70%
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925
审稿时长
12 weeks
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