Abstract

This study presents the major features of extreme spring cold spells (ESCS) in North China during 1961–2014 and the evolving processes. During an ESCS, northern Eurasia is controlled by large-scale...

Highlights

  • Cold surges in winter over East Asia, which are characterized by a strong Siberian high and sudden drop in surface air temperature (e.g. Zhang, Sperber, and Boyle 1997; Wang et al 2012; Park et al 2015; Ou et al 2015), usually cause considerable socioeconomic problems, such as adverse public health (Yang et al 2009; Chung et al 2009)

  • Compared with winter cold surges, which feature a strong increase in SLP and sharp drop in temperature (e.g. Zhang, Sperber, and Boyle 1997; Wang et al 2012; Park et al 2015; Ou et al 2015), extreme spring cold spells (ESCS) are mostly characterized by continuous negative temperature anomalies, which can robustly affect the growth of wheat in North China

  • In this study we investigate the features and related evolving processes of ESCSs in North China

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Summary

Introduction

Cold surges in winter over East Asia, which are characterized by a strong Siberian high and sudden drop in surface air temperature (e.g. Zhang, Sperber, and Boyle 1997; Wang et al 2012; Park et al 2015; Ou et al 2015), usually cause considerable socioeconomic problems, such as adverse public health (Yang et al 2009; Chung et al 2009). Zhang, Sperber, and Boyle 1997; Wang et al 2012; Park et al 2015; Ou et al 2015), usually cause considerable socioeconomic problems, such as adverse public health (Yang et al 2009; Chung et al 2009) They are one of the most important types of extreme weather/climate events, and closely related with the activity of the East Asian winter monsoon. Cold surges in East Asia are often accompanied by a strengthening of the Siberian high (Ding 1990; Zhang, Sperber, and Boyle 1997). To better understand North China ESCSs and provide helpful information for their prediction, in this study, we investigate the features of ESCSs over the past several decades, analyze the related atmospheric circulation, and reveal the evolving processes associated with North China ESCSs at the synoptic scale

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