| 刘德祥,董安祥,陆登荣.中国西北地区近43年气候变化及其对农业生产的影响[J].干旱地区农业研究,2005,(2):195~201 |
| 中国西北地区近43年气候变化及其对农业生产的影响 |
| Climatic change of northwest China and its influence on agricultural production in recent 43years |
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| DOI：10.7606/j.issn.1000-7601.2005.02.41 |
| 中文关键词: 气温 积温 降水量 气候变化 农业生产 |
| 英文关键词:temperature accumulated temperature precipitation climate changing agricultural product |
| 基金项目:甘肃省科技攻关计划"西北干旱成因及应用研究"(GS012-A45-118)； 甘肃干旱生态环境对全球气候变暖的响应及减灾技术的研究(2GS042-A44-017) |
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| 中文摘要: |
| 选取西北地区171个地面测站1961～2003年历年月平均气温、最高气温、最低气温、降水量,≥0℃、≥10℃积温和<0℃负积温等指标,分析近43年气候变化特征。月平均气温、最高气温、最低气温、≥0℃、≥10℃积温,1987～2003年比1961～1986年的平均值明显增高(多),尤以最低气温增幅最大,冬季升温幅度大于夏季,西北地区气候变暖主要来自于最低气温的贡献;<0℃负积温明显减少;降水量西部增多、东部减少,分界线与黄河走向基本一致。西北地区西部呈暖湿变化趋势,东部呈暖干变化趋势,喜温作物面积扩大,越冬作物种植区北界向北扩展。 |
| 英文摘要: |
| The paper uses such indexes collected by 171 experiment stations in northwest China between 1961 and 2003 as average monthly temperatures, the highest and lowest monthly temperatures, rainfalls, accumulative temperatures above zero ℃ and ten ℃ and the negative accumulative below zero ℃ to analyze the patterns for the climatic changes of northwest China. The average monthly temperatures, the highest and lowest monthly temperatures, the rainfalls, the accumulative temperatures above zero ℃ and ten ℃ in 19872003 remarkably increased compared with those in 19611986; Of them the lowest temperature did rise with the highest range and the temperatures in winter increased with a higher range than those in spring. The climatic changes of northwest China resulted from the contributions of the lowest temperatures. Meantime, the negative accumulative temperatures below zero℃ obviously declined, the rainfalls increased in the western part of northwest China and decreased in the eastern of north of China with the divide line moving along yellow river. Northwest China tended to become humid in its western part and warm in its eastern part so that warm-liking crops increased in planting area and overwinter crops moved toward north beyond their planting boundary. |
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