摘要
利用定西地区68a(1937—2004年)逐月降水量和气温资料,分析了甘肃中部气候变化特征。结果表明:月降水量明显减少和气温明显上升并存在突变;降水量、气温与海温间存在一定的联系;线性趋势由不明显到明显,相应的准4a周期由明显变为不显著。
By investigating distributing of monthly rainfall and monthly temperature in Dingxi area from 1967 to 2003, and applying the EOF （empirical orthogonal function） and wavelet analysis on these data, results show there were jump-points in evolvement of rainfall decreasing and temperature increasing. The slopes of the rainfall and temperature were difference. The rate of monthly rainfall was - 13.6mm/10a - 4.3mm/10a; temperature 0.883 ℃ / 10a - 0.108℃/10a. The rainfall and temperature was obvious correlation with SST （North pacific）. Also the lineartrendency of the rain and temperature changes had strengthened, the variation evolvement correspond with 4 years quasiperiod be- come of weakening.
出处
《沙漠与绿洲气象》
2007年第1期20-23,31,共5页
Desert and Oasis Meteorology
基金
国家自然科学基金项目(40205014)
科技部社会公益研究专项(2004DIB5J196)
干旱气象科学研究基金项目(IAM200508)
关键词
降水
气温
变化
特征
monthly rainfall monthly temperature
evolvement
characteristic
