【摘 要】
：
Trends in temperature and precipitation extremes from 1961 to 2008 have been investigated over Circum-Bohai-Sea region,China using daily temperature and precipitation data of 63 meteorological station
【出 处】
：
Chinese Geographical Science
论文部分内容阅读
Trends in temperature and precipitation extremes from 1961 to 2008 have been investigated over Circum-Bohai-Sea region,China using daily temperature and precipitation data of 63 meteorological stations.The re-sults show that at most stations,there is a
其他文献
To understand historical human-induced land cover change and its climatic effects, it is necessary to create historical land use datasets with explicit spatial information. Using the taxes-cropland ar
The scientific environmental ethics plays a key role in the recognition of the human-environment interactions. Modern environmental ethics is the philosophical re-thinking of modern human race environ
YE Danian, HE Wei, LI Zhe, XU Wendong Anhui Education Press,Hefei,2011,x+260 pp,ISBN 978 7 5336 5737 6(hardback),CHY 58.00 As products of urbanization, cities are focal points for social and economic
Electric power consumption (EPC) is one of the basic indices for evaluating electric power use. Obtaining timely and accurate data on the spatiotemporal dynamics of EPC is crucial for understanding an
青藏铁路格尔木-拉萨段沿线地表松散沉积物广泛分布,为风沙活动的产生提供了丰富的物质来源。地表松散沉积物按成因分为现代风成沙,河流冲积物,古风成沙和洪积、湖积沉积物。粒度分析结果显示,格-拉段沿线风沙物质(沙丘沙、防沙体系积沙)样品(56个)平均粒径变化于1.29～3.25Φ之间,均值2.36Φ(0.19mm)。平均粒径在2～3Φ(0.25～0.125mm)之间的样品占总数的78.57%。粒度组成以
Urban clusters are the expected products of high levels of industry and urbanization in a country, as well as being the basic units of participation in global competition. With respect to China, urban
利用DMT公司生产的连续流单过饱和度云凝结核计数器2007年8月在内蒙古自治区阿拉善左旗、宁夏回族自治区石嘴山市惠农区进行观测,并利用机载PMS观测资料,探讨贺兰山两侧云凝结核(CCN)在近地面和高空的垂直变化。分析表明,CCN主要来源于下垫面,污染地区的浓度明显高于沙漠地区,城市污染对CCN浓度的影响很大。CCN浓度的日变化非常明显。不同过饱和度下粒子谱谱型不同,主要表现为单峰型。过饱和度越大,
运用ARCGIS9.0对2008年石羊河流域遥感影像土地利用覆盖图统计分析,得出各种天然植被的覆盖状况,利用潜水蒸发法对研究区内各县区的天然植被生态需水量进行了估算,并根据石羊河重点治理规划对未来的天然植被生态需水量进行了预测分析。结果表明,石羊河流域现状天然植被最低生态需水量为1.9536亿m3,最高生态需水量为6.3425亿m3,其中,永昌县的天然植被生态需水量为0.6855～2.5141亿m
To identify impact factors on the distribution and characters of natural plants community in reclamation area, with survey data from 67 plant quadrats in July 2009, soil properties data from 216 sampl
Spatial heterogeneity is widely used in diverse applications, such as recognizing ecological process, guiding ecological restoration, managing land use, etc. Many researches have focused on the inhere