| 摘要: |
| 【目的】分析青海湟水流域降水量的时空分布特征及与气温的关系。【方法】以湟水流域7个气象站点1971-2007年近37年的实测降水及气温作为研究资料，分析降水量长期变化趋势的时空分布特征及气温对降水量的影响。【结果】1971-2007年湟水流域近37年平均降水量略有增加，降水主要集中在夏季(6-8月)，而降水量增加主要发生在春季(3-5月)。降水相对变率在1971-2000年明显增加，可靠性降低；2001-2007年降水相对变率减小，可靠性增加。在降水量丰沛和偏少的地区，降水量增加幅度不明显；而降水量中等地区，降水量增加趋势明显。1971-2007年湟水流域气温呈增加趋势；气温与降水量间大致呈负相关。【结论】流域内近37年平均气温明显增加，降水量略有增加，气温与降水量大致呈负相关，气温低的地区降水相对较多，气温高的地区降水相对较少。气温与降水量变化的关系比较复杂。 |
| 关键词: 湟水流域 降水量 气温 可靠性 |
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| 基金项目:regularity of distribution and relation with temperature in Huangshui river |
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| Long-term trend of precipitation for spatial and temporal |
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| Abstract: |
| 【Objective】To explore the relationship between of characteristics of spatial and temporal distribution of precipitation variation and temperature.【Method】Combining the precipitation and temperature data from 7 climatological stations from 1971 to 2007,analyses the characteristics of spatial and temporal distribution and influence of temperature on precipitation near 37 a in Huangshui river basin area.【Result】The results shows that:Huangshui river basin,a slight increase in average annual precipition;rainfall concentrated in summer (June-August),while the increase occurred mainly in spring(March-May);the relative change rate of precipitation was significantly increased from 1971 to 2000 but relatively poor reliability of precipitation,and the situation is reversed between 2001 and 2007.There is no significant increase mutual 37 a precipitation in abundant and rare region,while relatively low rainfall area the precipitation trends increase is the most obvious.Average temperature shown a slight increase,and had a negative correlation with precipitation.【Conclusion】Nearly 37 years the average temperature increased significantly in the basin,the precipitation increases slightly,the temperature was negatively correlated with precipitation,the precipitation is relatively more in the low temperature region,the precipitation is relatively less in the high temperature region.The relationship of temperature and precipitation is complex. |
| Key words: Huangshui river precipitation temperature reliability |
