【摘 要】
：
在利用常规观测资料统计分析2000—2011年和沙尘天气多发年河西走廊入口区代表站点春季风速分布特征的基础上,采用区域气候模式(Regcm4.3.5.6)和欧洲中心更新的4DVar同化的ERA-interim资料,分析了河西走廊入口区下垫面类型改变对2007年4月13日一次沙尘天气过程的影响。结果表明:沙尘暴爆发时,河西走廊为风速大值区,风速8~10m·s-1;区域气候模式模拟的沙尘特征量与站点观
论文部分内容阅读
在利用常规观测资料统计分析2000—2011年和沙尘天气多发年河西走廊入口区代表站点春季风速分布特征的基础上,采用区域气候模式(Regcm4.3.5.6)和欧洲中心更新的4DVar同化的ERA-interim资料,分析了河西走廊入口区下垫面类型改变对2007年4月13日一次沙尘天气过程的影响。结果表明:沙尘暴爆发时,河西走廊为风速大值区,风速8~10m·s-1;区域气候模式模拟的沙尘特征量与站点观测的沙尘天气分布对比发现,模拟的沙尘区的发展变化能较好地表征这次沙尘天气过程的变化;河西走廊入口区植被由
其他文献
Land use structure optimization(LUSO) is an important issue for land use planning. In order for land use planning to have reasonable flexibility, uncertain optimization should be applied for LUSO. In
The aquatic ecosystem maybe significantly affected by polycyclic aromatic hydrocarbons(PAHs) released from fresh water sediments. In order to protect biodiversity, the spatial distribution and sources
The Chinese National Antarctic Research Expedition(CHINARE) was established and first reached the Antarctic in 1984. Up until 2017, China has undertaken 33 cruises to Antarctica, and seven cruises to
The Arctic is one of the most sensitive regions that respond through feedback to global climate changes. Climatic, hydrological and ecological changes in the Arctic are clear evidence of global warmin
To improve our understanding and ability to predict biological responses to global climate change, it is important to be able to distinguish the influences of natural forcing from anthropogenic impact
China launched its Arctic research program and organized the first Chinese National Arctic Research Expedition(CHINARE-Arctic) in 1999. By 2016, six further expeditions had been conducted using the R/
Climate change in the Arctic region is more rapid than that in other areas owing to Arctic amplification.To better understand climate change and the driving mechanisms,long-term historical reconstruct
种群动态与种内竞争是植物生态学经典研究核心,特别是对于植被组成相对简单的荒漠,对种内竞争机制的研究有助于深入理解荒漠植被的稳定机制与自组织过程。以河西走廊绿洲边缘最主要的人工固沙植物梭梭(Haloxylon ammodendron)为对象,采用空间代替时间的方法,研究梭梭种群的演变过程及种群竞争强度随建植年龄的变化。选择5个(5~10、10~20、20~30、30~40、>40a)生长阶段的受人为
采用黑河下游面域土壤信息调研数据,结合层次聚类和地统计分析等方法,探讨黑河下游土壤盐分在水平方向和垂直方向上的变异特征,揭示黑河下游土壤盐渍化的程度和状态。结果表明:研究区土壤盐分表聚特征明显。土壤盐分及离子组分含量存在很强的变异性,变异系数0.42~1.99。黑河下游土壤盐渍化类型主要为氯化物-硫酸盐型,土壤盐渍化程度较为严重,盐土占比高达42.87%。从土壤盐分在水平方向上的变异特征来看,表土
采用点格局分析方法 O-ring统计和Programita软件,对甘肃民勤绿洲荒漠过渡带人工梭梭(Haloxylon ammodendron)林大沙鼠鼠洞空间分布格局及其与梭梭间的相互关系进行了研究。结果表明:(1)废弃鼠洞与全部鼠洞的格局相似,废弃鼠洞与有效鼠洞在0~10m尺度上基本无关联。(2)在小于1m的尺度上鼠洞于梭梭周围聚集或趋于聚集分布,随着尺度的增大,植物园西中有效鼠洞与废弃鼠洞均由