【摘要】 针对CO₂浓度变化是否影响区域气候暖干化的问题,本文研究了锡林浩特地区CO₂浓度与气温、降雨量、干燥度的相互关系。基于1999—2013年的CO₂浓度数据,本文分析了研究区CO₂浓度的时空分布规律,结果表明CO₂浓度逐年增加,CO₂月平均浓度最高值出现在5月份,最低值在1月份,在空间上CO₂浓度呈现东南高、西北低的格局。本研究采用滑动平均法、最小二乘法分析了研究区1999—2013年的年均温和年降水量的变化趋势,并引入表征气温和降水变化趋势的指数干燥度IdM,用整个研究区的500个随机点,分别提取CO₂月平均浓度与平均气温及降水距平百分率,进行相关分析,结果显示CO₂浓度与气温呈线性正相关,与降水距平百分率呈线性负相关,即CO₂的浓度越高,气候变暖明显,降水量下降,致使锡林浩特地区气候呈现暖干化趋势。本研究为草原地区气候变化的深入研究奠定理论基础。更多还原

【Abstract】 For the question whether the regional climate warming and drying were affected by variations of CO₂ concentration,this paper studied the relationship between CO₂ concentration and temperature,precipitation and aridity in Xilinhot region. Based on the data in 1999—2013,this paper analyzed the regularity of the distribution of time and space of CO₂ concentration in Xilinhot area. It was showed that CO₂ concentration increased year by year. In addition,monthly mean value reached the maximum in May,and reached the minimum in January. In fact,CO₂ concentration was high in the southeast,low in the northwest in space in study area.This paper analyzed the variation trend of the annual temperature and precipitation with least-squares method and moving average in study area during 1999—2013. And this study analyzed the influence on climate warming and drying by CO₂ concentration through introducing the index called aridity,which represented the trend of temperature and precipitation. Through the correlation analysis,this study analysed the relationship between monthly mean value of CO₂ concentration and mean temperature and precipitation anomaly percentage with the 500 random points which extracted respectively in the whole study area. It was concluded that CO₂ concentration and temperature were positively linearly correlated,CO₂ concentration and precipitation anomaly percentage showed a negative linear correlation. And it was concluded that the climate presented a trend of warming and drying because of the increasing of CO₂ concentration and declining of precipitation in Xilinhot. This study lays a theoretical basis for the further research of climate change in the prairie region.更多还原