营口和鞍山城市气候变化对比分析及原因探讨

利用1951—2005年辽宁省沿海轻工业城市营口和重工业城市鞍山的气温、降水、云量、相对湿度及平均风速等气候资料,采用对比分析方法,分析了近55 a来2城市的各类气候变化特征及产生的原因。结果表明:近55 a来营口和鞍山平均气温呈递增趋势,降水、总云量、平均风速和相对湿度均呈递减趋势,只有低云量变化趋势不同,其中营口呈递增趋势,鞍山呈递减趋势,鞍山平均气温递增趋势及总云量、平均风速和相对湿度递减趋势均强于营口同类气候要素变化;营口和鞍山城市平均气温、相对湿度、低云量和风力气候要素特征趋势变率较大,降水和总云量趋势变率相对较小。

Comparison on urban climate change between Anshan and Yingkou

Based on climate data including air temperature,precipitation,cloud cover,relative humidity and average wind speed from 1951 to 2005 in Yingkou-an inshore light industry city and Anshan-an inland heavy industry city,the climate change characteristics in two cities and their formative reasons were analyzed by comparison analysis method.The results show that average air temperature takes on an ascending trend in two cities during the recent 55 years,while precipitation,total cloud cover,average wind speed and relative humidity take on descending trends.Only low cloud covers in two cities have different change trends with an increasing trend in Yingkou and a decreasing trend in Anshan.The intensity of ascending trend of average air temperature and intensities of descending trends of average wind speed and total cloud cover as well as relative humidity in Anshan are stronger than those in Yingkou.Variation rates of climatic elements are larger in two cities,including average air temperature,relative humidity,low cloud cover and wind force.However,variation rates of precipitation and total cloud cover are smaller.