近53年共和地区作物生长季气候变化特征分析

摘要

利用青海省共和地区1961—2013年作物生长季（4—9月）气温、积温、降水、日照、无霜期等常规气象资料，对共和地区作物生长季气候变化进行分析。结果表明，共和地区近53年作物生长季平均气温、≥0℃积温呈极显著增温趋势；无霜期日数总体呈极显著增多趋势；而生长季降水量、日照时数则呈不显著减少趋势。%The characteristics of cli-mate change in Gonghe Area during crop growing season in nearly 53 years were analyzed, by air temperature, accu-mulated temperature, precipitation, sun-shine, frost and other conventional mete-orological data of Gonghe Area in Qinghai Province during crop growing season (April to September) in 1961-2013. The results showed that average temperature, ≥0 ℃ accumulated tem-perature of Gonghe Area had signifi-cant warming trends during crop growing season in nearly 53 years. Overall there was a significant increase in the trend of frost-free days. The decreasing trend of growing season precipitation, sunshine hours were not significant.