青海共和盆地气温的时空动态及其效应分析
Temporal - Spatial Analysis of Temperature and Its Effect on Climate and Water in Qinghai Gonghe Basin
查看参考文献13篇
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文摘
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在青藏高原东北缘的青海共和盆地,本文依据三个主要气象站(茶卡、恰卜恰和贵南)及18个临时气象站的长短期气象资料和共和县(恰卜恰站)的土壤水分资料,利用时间序列分析、数字高程模型和Penman-Monteith公式,对共和盆地的年均温时空变化及其对气候的影响进行了分析.结果表明:共和盆地的年均温序列是非平稳的,存在线性增长趋势;依据年均温的线性模型,茶卡、恰卜恰和贵南的气温平均每年分别升高0.0247、0.0422和0.0272℃;共和盆地的两大沙地(沙珠玉-塔拉滩和木格滩)处于气温高值区(1.0～4.0℃和1.0～2.9℃),而且气温的空间分布与年潜在蒸散的空间分布是显著的正相关;由于气温升高,盆地内水汽压饱和差和潜在蒸散增大,表层土壤水分减少,因此共和盆地的气候会逐渐趋于干燥;但研究期内气温升高的效应比较小,所以短期内(尤其是研究期内)共和盆地的荒漠化加剧问题有待进一步分析. |
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其他语种文摘
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In the northeastern part of Qinghai-Tibetan plateau lies Gong-he basin. The paper discusses the temporal-spatial characteristic of temperature and its effect on climate and water according to the meteorological data (1953~2001) from three weather stations and soil water ma-terial (1980~2002) in Qiabuqia weather station by time series method, DEM and Penman-Mon-teith equation. The results show that annual temperature time series are not stationary, but with linear upward trend; and annual average temperature in Chaka and Qiabuqia and Guinan is in-creasing by 0.0247、0.0422 and 0.0272 ℃ respectively per year according to the linear model in Gong-he basin; furthermore, the spatial distribution of annual average temperature can be simu-lated by using multivariable linear model based on digital elevation model (DEM 100 * 100m~2) and by using the data at three permanent weather stations and more than ten temporary weather stations. The two big sand bands(Shazuyu-Tala and Mugetan) is in the higher scope of tempera-ture（1.0~4.0 ℃and 1.0~2.9 ℃) according to the simulated result, and there is a direct correlation between annual temperature and potential evapotranspiration in space; with temperature rising, the saturated difference of water pressure and potential evapotranspiration increases gradually, and soil water decreases in topsoil; so it makes the climate drier, and desertification become more serious gradually in the future in Gong-he basin in Qinghai province. But in short-term, especially in the period of research, the change of climate is very slight, so the cause of deserti-fication needs to be analyzed further in Gong-he basin. |
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来源
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地理科学进展
,2004,23(3):100-106 【核心库】
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关键词
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青藏高原
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共和盆地
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温度
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DEM
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气候变暖
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地址
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1.
中国农业大学资源和环境学院, 北京, 100094
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中国林科院, 北京, 100091
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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1007-6301 |
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学科
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大气科学(气象学) |
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基金
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国家“十五”科技攻关重大项目
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文献收藏号
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CSCD:1706518
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