Variation in Principal Modes of Midsummer Precipitation over Northeast China and Its Associated Atmospheric Circulation

This study documents the first two principal modes of interannual variability of midsummer precipitation over Northeast China(NEC) and their associated atmospheric circulation anomalies. It is shown that the first principal mode exhibits the largest amount of variability in precipitation over the south of NEC(referred to as the south mode), whereas the second principal mode behaves with the greatest precipitation anomaly over the north of NEC(referred to as the north mode). Further findings reveal that, through modulating moisture transportation and upper-and lower-troposphere divergence circulation as well as vertical movement over NEC, the anomalous northwestern Pacific anticyclone and the anticyclone centered over northern NEC exert the dominant influence on the south and north modes, respectively. Additionally, it is quantitatively estimated that water vapor across the southern boundary of NEC dominates the moisture budget for the south mode, while the north mode has a close connection with moisture through NEC's northern and western boundaries. Furthermore, the north(south) mode is strongly related to the intensity(meridional shift) of the East Asian westerly jet.     

Variations in the summer monsoon rainbands across eastern China over the past 300 years

Based on reconstructions of precipitation events from the rain and snowfall archives of the Qing Dynasty (1736–1911),the drought/flood index data mainly derived from Chinese local gazettes from 1736–2000, and the observational data gathered since 1951,the spatial patterns of monsoon rainbands are analyzed at different time scales.Findings indicate that monsoon rainfall in northern China and the middle-lower reaches of the Yangtze River have significant inter-annual(e.g.,5–7-yr and 2–4-yr)as well as inter-de...     

地价与房价之争中的湖南省被调查楼盘

国土资源部7月24日公布了全国620个楼盘调查的土地成本数据。根据调查结果，620个案例地价占房价比例平均为23．2％，356个项目比例在15％～30%之间。其中，比例在30％以下的约占总数的78％。此次调查共涉及湖南4座城市，23个楼盘。     

编者的话

为了落实国务院3号文件精神并对气象服务的效益和新的需求进行评估，中国气象局在2006年开展了全国范围的气象服务效益调查，除了港、澳、台以外的所有省级气象局均参加了调查活动（一些省、地市和县级组织调查结果，我刊曾给予介绍并将继续关注）。为了评估公共气象服务所产生的社会效益，全国有17万多人在去年夏季前后接受了问卷调查，对这些答卷的统计就给出了对气象工作的评价和进一步的需求。[第一段]     

新加坡成亚洲“最绿城市”

“绿色指数”与经济可持续发展的关联度越来越密不可分。西门子公司近日委托独立调研合作伙伴经济学人智库对亚洲22个主要城市在环境和气候保护领域的目标和成就进行调查,调查结果显示,新加坡成为亚洲“最绿色”的大都市。而另外一些数据也值得关注,     

全球近四分之一土地发生退化

联合国粮农组织（FAO）日前公布的一份调查结果显示,在从1981年到2003年的20多年时间里,全球遭受破坏的森林面积以及无法种植农作物的土地面积约达3506万平方公里,相当于地表面积的24％,全球有超过15亿人的生活因此受到影响。此项各国土地状况调查是根据美国地球探测卫星1981年7月到2003年12月的数据推算出的已经退化土地面积。     

卫星导航定位基准站网调查分析与发展思考

卫星导航定位基准站网建设应用近年来发展迅猛,被越来越多的用户所使用。本文基于全国卫星导航定位基准站调查摸排结果,分析我国基准站建设、运维和应用的状况,针对存在的问题深入思考,对加强基准站统筹协调、排除隐患、规范管理提出相关建议和发展思路。     

新居依然老邻居相伴北川重建规划注重精神抚慰

建设部北川新县城灾后重建总体规划项目负责人朱子瑜近日接受采访时说：“在灾区的重建上,我们做了大量调查,调查灾民喜欢住什么样的新房子。调查结果显示,除了房子的结构和面积外,灾民特别希望仍旧和原来的邻居住在一起。”这表示灾民们不希望以往的社会结构被打乱,