共查询到10条相似文献,搜索用时 62 毫秒
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近40年来三江源区气候资源的变化 总被引:13,自引:0,他引:13
利用长江、黄河、澜沧江三江源地区18个气象台站1961-1999年的气象资料,统计并分析了降水、热量、光照以及蒸发量等气象要素近40年来的变化趋势、年代际变化特征,揭示了三江源区气候资源变化的实际情况,为该区生态环境建设工程提供基本数据和参考。 相似文献
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都兰县近40年气候资源变化特征分析 总被引:2,自引:0,他引:2
利用都兰县1961-2000年40年气象资料,运用统计学方法,对光、热、水等气候资源以及蒸发、风等气象要素的变化进行了分析,揭示了气候资源变化的基本事实和变化规律。结果表明:随着全球气候的变暖,近40年来,都兰县平均气温以0.269℃/10a的气候倾向率呈较明显的增温趋势,进入20世纪90年代升温趋势更加明显;气温≥0℃、≥5℃和≥10℃期间的积温均呈上升趋势,其中,≥10℃期间的积温上升趋势最为明显;年和汛期降水量增加,夏季降水量增加尤为明显;日照时数、蒸发和风速的年际变化呈下降趋势。 相似文献
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根据江河源区16个气象观测台站40a的气候资料,通过分析发现年平均气温呈上升趋势,普遍升高0.2℃-0.4℃;而降水增率较小,几乎不变;再加上干旱多风、剧烈蒸发,使得区内植被退化,水源涵养能力降低、河流径流锐减、土地荒漠化加剧、水土流失严重、冰川退缩。 相似文献
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Cristina Mateus Desiree D. Tullos Christopher G. Surfleet 《Journal of the American Water Resources Association》2015,51(2):400-420
Future changes in water supply are likely to vary across catchments due to a river basin's sensitivity to climate and land use changes. In the Santiam River Basin (SRB), Oregon, we examined the role elevation, intensity of water demands, and apparent intensity of groundwater interactions, as characteristics that influence sensitivity to climate and land use changes, on the future availability of water resources. In the context of water scarcity, we compared the relative impacts of changes in water supply resulting from climate and land use changes to the impacts of spatially distributed but steady water demand. Results highlight how seasonal runoff responses to climate and land use changes vary across subbasins with differences in hydrogeology, land use, and elevation. Across the entire SRB, water demand exerts the strongest influence on basin sensitivity to water scarcity, regardless of hydrogeology, with the highest demand located in the lower reaches dominated by agricultural and urban land uses. Results also indicate that our catchment with mixed rain‐snow hydrology and with mixed surface‐groundwater may be more sensitive to climate and land use changes, relative to the catchment with snowmelt‐dominated runoff and substantial groundwater interactions. Results highlight the importance of evaluating basin sensitivity to change in planning for planning water resources storage and allocation across basins in variable hydrogeologic settings. 相似文献
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宁夏近51年气候变化特征分析 总被引:1,自引:0,他引:1
利用宁夏10个气象站1960-2010年日气温和降水资料,对宁夏气温和降水的时空变化特征进行了分析.结果显示:①宁夏整体呈现暖干化趋势,但存在区域间差异.②近51年来宁夏年平均气温呈上升趋势,冬季升温幅度大,秋季升温幅度最小.③年平均降水量总体呈现减小趋势,春季微弱增加,冬季降水量显著增加,夏季降水微弱减少,秋季降水减少明显.④通过Kriging空间差值法分析表明,年平均气温总体呈现由西南向西北递增的趋势,中、北部增温较明显;平均年总降水量总体呈现由西南向西北递减的规律,中、北部降水量减小最为明显. 相似文献
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