利用中国东部地区315个台站1963-2012年月平均地面观测资料,揭示了东部地区冬季和夏季地面比湿（SH）和相对湿度（RH）多年平均值及其变率的空间分布特征,并分析和比较了地理因素（经度、纬度和海拔高度）对其空间分布的影响。结果表明...利用中国东部地区315个台站1963-2012年月平均地面观测资料,揭示了东部地区冬季和夏季地面比湿（SH）和相对湿度（RH）多年平均值及其变率的空间分布特征,并分析和比较了地理因素（经度、纬度和海拔高度）对其空间分布的影响。结果表明：1）在冬季,SH（0.4-7 g kg^-1）以秦岭-淮河线为界,呈现出“北低南高”的分布特征;RH（41%-82%）则呈现出“南北高、中间低”的分布特征;一般冬季地面湿度相对较低的地区其变化幅度相对较大。2）在夏季,SH（7-20 g kg^-1）整体上明显大于冬季,RH（44%-89%）则与冬季差异不大,均呈现由东南部沿海向西北内陆递减的分布特征;同样夏季地面湿度较低的地区通常其变化幅度也相对较大。3）东部地区冬季地面湿度空间分布受地理因素影响,其中纬度是最主要的影响因素,经度次之,海拔高度对其整体分布影响不明显,且地理因素对冬季SH的回归效果明显好于对冬季RH的回归效果。4）东部地区夏季地面湿度空间分布受地理因素影响较冬季显著,纬度同样是影响夏季地面湿度最主要的因素,但海拔高度对夏季SH、经度对夏季RH的影响程度较冬季增大,且地理因素对夏季SH的回归效果同样好于对RH的回归效果。展开更多
By using the daily average relative humidity data in Urumqi during 1961-2000,the basic climate characteristics and the variation trend of relative humidity in Urumqi in recent 40 years were analyzed.The results showed...By using the daily average relative humidity data in Urumqi during 1961-2000,the basic climate characteristics and the variation trend of relative humidity in Urumqi in recent 40 years were analyzed.The results showed that the yearly average relative humidity in Urumqi was 57.5%.The relative humidity in winter was 77.5% which was the biggest all the year round,and the relative humidity in summer was 41.2% which was the smallest.The relative humidity in spring,summer,autumn,winter and the yearly relative humidity all displayed the increase trend.The yearly mean relative humidity had the periods of mainly 2,3-4 and quasi-7 years.The periodic oscillation of quasi-7 years was the strongest.展开更多
文摘利用中国东部地区315个台站1963-2012年月平均地面观测资料,揭示了东部地区冬季和夏季地面比湿（SH）和相对湿度（RH）多年平均值及其变率的空间分布特征,并分析和比较了地理因素（经度、纬度和海拔高度）对其空间分布的影响。结果表明：1）在冬季,SH（0.4-7 g kg^-1）以秦岭-淮河线为界,呈现出“北低南高”的分布特征;RH（41%-82%）则呈现出“南北高、中间低”的分布特征;一般冬季地面湿度相对较低的地区其变化幅度相对较大。2）在夏季,SH（7-20 g kg^-1）整体上明显大于冬季,RH（44%-89%）则与冬季差异不大,均呈现由东南部沿海向西北内陆递减的分布特征;同样夏季地面湿度较低的地区通常其变化幅度也相对较大。3）东部地区冬季地面湿度空间分布受地理因素影响,其中纬度是最主要的影响因素,经度次之,海拔高度对其整体分布影响不明显,且地理因素对冬季SH的回归效果明显好于对冬季RH的回归效果。4）东部地区夏季地面湿度空间分布受地理因素影响较冬季显著,纬度同样是影响夏季地面湿度最主要的因素,但海拔高度对夏季SH、经度对夏季RH的影响程度较冬季增大,且地理因素对夏季SH的回归效果同样好于对RH的回归效果。
文摘By using the daily average relative humidity data in Urumqi during 1961-2000,the basic climate characteristics and the variation trend of relative humidity in Urumqi in recent 40 years were analyzed.The results showed that the yearly average relative humidity in Urumqi was 57.5%.The relative humidity in winter was 77.5% which was the biggest all the year round,and the relative humidity in summer was 41.2% which was the smallest.The relative humidity in spring,summer,autumn,winter and the yearly relative humidity all displayed the increase trend.The yearly mean relative humidity had the periods of mainly 2,3-4 and quasi-7 years.The periodic oscillation of quasi-7 years was the strongest.
