【摘 要】
:
Characteristics of the spatiotemporal distributions of precipitation anomalies in the reaches of the Yangtze River and Huaihe River (YHR) were studied using EOF
【机 构】
:
Institute of Atmospheric Physics, State Key Laboratory of Numerical Modeling for Atmospheric Science
论文部分内容阅读
Characteristics of the spatiotemporal distributions of precipitation anomalies in the reaches of the Yangtze River and Huaihe River (YHR) were studied using EOF method. Four main precipitation patterns for the YHR in summer identified by the first two modes: a region-wide flood over the entire YHR (RWF); a region-wide drought over the entire YHR (RWD); a flood in the south with a drought in the northern region of the Yangtze River (FS-DN); and a drought in the south with a flood in the northern region of the Yangtze River (DS-FN). Based on the first two modes and the actual precipitation departure percentage, a new precipitation index is defined in this paper. The typical flood/drought years associated with the various rainfall patterns defined by this precipitation index are more representative and closer to reality compared to some existing precipitation indexes which just use the area-mean precipitation or the EOF time components individually. The characteristics of atmospheric circulation in summer corresponding to the four main precipitation patterns over the YHR in summer show the features of atmospheric circulation differ in different precipitation pattern years. Although the different patterns share a common main influential circulation system, such as the blocking high over northeastern Asia, the low trough of westerly flows in the mid latitudes, the West Pacific Subtropical High (WPSH), and the high ridge over the Tibet Plateau, the difference in location and intensity of these systems can lead to different distributions of precipitation anomalies.
其他文献
Among existing remote sensing applications, land-based X-band radar is an effective technique to monitor the wave fields, and spatial wave information could be
In this paper, a novel method called fuzzy diffusion maps (FDM) is proposed to evaluate cartoon similarity, which is critical to the applications of cartoon rec
Abstract Observations indicate that Ellerman bombs(EBs)and chromospheric microflares both occur in the lower solar atmosphere,and share many common features,such
3G移动教育已成为远程教育发展的必然趋势,但国内缺乏实用的3G移动教育系统。因此,结合3G移动通信技术、GPS定位技术和移动教育的特点,构建了一套基于GPS的3G移动学习系统(MLS3G)模型。解决3G智能终端、GPS/GPRS收发模块、3G网关模块、GIS模块等关键技术问题后,在3G智能终端和MLS3G服务器平台上通过测试验证。研究表明,MLS3G模型具有较好的交互性、实时性和通用性。
The most severe snowstorm and freezing-rain event in the past 50 years hit central and southern China in January 2008. One of the main reasons for the anomalous
Climatic changes in the onset of spring in northern China associated with changes in the annual cycle and with a recent warming trend were quantified using a re
This is the second part of the authors' analysis on the output of 24 coupled climate models from the Twentieth-Century Climate in Coupled Models (20C3M) experim
10月30日,从杭州临江工业园区管委会获悉.中石化、浙江恒逸石化有限公司合资成立的浙江巴陵石化恒逸己内酰胺有限责任公司20万吨/年己内酰胺项目已进入工艺配管、电仪安装阶段,预
The characteristics of coal seam development, and the prospects of a favorable coal-forming area, were evaluated for the Liaohe Basin located in China. The Numb
Based on the statistics of glacier area variation measured in the Chinese Tianshan Mountains since 1960, the response of glacier area variation to climate chang