Search Results

You are looking at 1 - 10 of 624 items for :

  • Mei-yu fronts x
  • Refine by Access: All Content x
Clear All
Jun Peng, Lifeng Zhang, Yu Luo, and Yun Zhang

as a range where there is neither a significant source nor sink of KE. Thus, the relevance of these theories to the complex atmosphere is clearly in question. In fact, some typical weather systems associated with mesoscale phenomena, such as baroclinic wave system and mei-yu front system, can implement the increase or decrease of KE through the strong convection and other physical processes. Since the simulations of idealized baroclinic waves were known to provide convenient framework for the

Full access
Biao Geng

1. Introduction The early summer rainy season in East Asia is referred to as the mei-yu season; “mei-yu” means “plum rain” in Chinese. This season is also known as baiu in Japanese and jangma in Korean. During the mei-yu season, a quasi-stationary front known as the mei-yu front develops and extends from inland China to Japan, and the substantial rainfall that occurs during the mei-yu season has a great impact on regional climates. Previous studies have emphasized the effects of the mei-yu

Full access
Yuan Wang, Lifeng Zhang, Jun Peng, and Jiping Guan

amplitude of lower-frequency horizontally propagating waves will be reduced in comparison with the higher-frequency vertically propagating waves. Therefore, they expected that in a real atmosphere, the contribution to the power spectrum from the lower-frequency waves would be significantly less than that from the higher-frequency waves. If the expectation of Lane and Reeder (2001) is true, the oscillatory forced waves should dominate in the real atmospheric stratosphere. The early summer mei-yu front

Full access
Jun Peng, Lifeng Zhang, Yu Luo, and Chunhui Xiong

1. Introduction This is the second part of an investigation into the dynamics of the mesoscale energy spectra of the mei-yu front system. In Peng et al. (2014 , hereafter Part I ), we investigated the different physical mechanisms responsible for the mesoscale horizontal kinetic energy (HKE) spectra of the mei-yu front system in the upper troposphere and lower stratosphere. That study employed a spectral HKE budget analysis of an idealized mei-yu front system simulated by the Weather Research

Full access
Yuanchun Zhang, Fuqing Zhang, Christopher A. Davis, and Jianhua Sun

. 1994 ; Rogers and Fritsch 2001 ; Davis and Trier 2002 ) and/or the convergence of larger-scale or planetary vorticity ( Bartels and Maddox 1991 ; Skamarock et al. 1994 ). However, some studies showed that tilting of preexisting horizontal vorticities could also contribute to the MCV development (e.g., Brandes 1990 ; Zhang 1992 ; Kirk 2007 ). The mei-yu front is a warm-season quasi-stationary, east–west-oriented frontal zone that forms over central and east China characterized by a weak

Full access
George Tai-Jen Chen, Chung-Chieh Wang, and Stefano Chih-Shin Liu

1. Introduction During the transition period from prevailing winter northeasterlies to summer southwesterlies over east Asia, there often exists a quasi-stationary or slow-moving frontal system called the mei-yu front (or the baiu front by Japanese). The mei-yu front appears on satellite imageries as an elongated cloud band, extending approximately from southern Japan to the interior of southern China, and often brings a significant amount of rainfall to the region. Because of its profound

Full access
Hsi-Chyi Yeh, George Tai-Jen Chen, and W. Timothy Liu

1. Introduction During the early summer rainy season of Taiwan (from mid-May to mid-June), the passage of frontal systems usually dominates the production of island rainfall, especially over northwestern Taiwan ( Yeh and Chen 1998 ). About four to five surface frontal systems advance southeastward from southern China to Taiwan each year ( Chen 1992 ), replacing southwesterly monsoon flow with postfrontal northeasterlies ( Chen and Li 1995 ). The surface front is called the mei-yu front in

Full access
Shou-Jun Chen, Ying-Hwa Kuo, Wei Wang, Zu-Yu Tao, and Bo Cui

1. Introduction The rainy season (May–July) in east Asia is referred to as Mei-Yu in China and Baiu in Japan. During this period, the plum (Mei in Chinese) is ripe in the Jiang-Huai Basin, eastern China, and the rain (Yu in Chinese) occurs. In this season, a quasi-stationary front, known as the Mei-Yu front, is formed and extends from eastern China to southern Japan. The Mei-Yu front is one of the most significant circulation systems for the hydrological cycle in the east Asia

Full access
Xiaokang Wang, Xiquan Dong, Yi Deng, Chunguang Cui, Rong Wan, and Wenjun Cui

characterized by the presence of a quasi-stationary cloud band extending from southern Japan to southern China ( Geng 2014 ), in association with an abrupt northward migration and maintenance of the East Asian summer monsoon ( Ding 2005 ; Sampe and Xie 2010 ). At the surface, the cloud band is associated with a quasi-stationary front (the mei-yu front; Hsu and Sun 1994 ). To the south side of the mei-yu front, winds are from the southwest in the lower troposphere, carrying much warm and moist air. To the

Open access
Wenwen Kong and John C. H. Chiang

) argued that the extratropical northerlies downstream of the Tibetan Plateau are crucial in maintaining the mei-yu front via advecting dry enthalpy and strengthening the moisture convergence over central eastern China. The above studies suggested different processes for how the westerlies affect the mei-yu. Although the origins of these mechanisms are independent, they consistently indicate the meridional position of the westerly jet relative to the Tibetan Plateau is key to formation and maintenance

Free access