【摘要】 利用内蒙古地区50个站点1959~2009年逐日气象资料,采用FAO56 Penman-Monteith方法计算出逐年参考蒸散量,探讨参考作物蒸散量的年际变化特征,运用ArcGIS软件分析参考作物年均蒸散量的空间分布规律,并分析其与气象因子的相关性。结果表明,51年间,内蒙古自治区的参考作物年蒸散量变化速率为-15~42 mm/(10年);全区的参考作物年均蒸散量从东北部向西部方向呈逐渐增大的趋势;风速和太阳总辐射量是影响参考作物蒸散量变化的主要因子。更多还原

【Abstract】 Based on the daily meteorological measurements of 50 meteorological stations from 1959 to 2009 in the Inner Mongolia, the yearly reference evapotranspiration were estimated with the Penman-Monteith equation. The interannual variation characteristics of the reference crop evapotranspiration(ET0) were studied. The space-time distribution of the ET0 with Arcgis software was analyzed. The correlation between ET0 and meteorological factors were studied. The results showed that the ET0 of the inner Mongolia had an average yearly rate of change of-15~42 mm / 10 a in recent 51 years. The ET0 had a tendency of gradually increasing from the northeast to the west of the Inner Mongolia. The average wind speed and solar total radiation were the main factors affecting the ET0.更多还原