| 郭江勇,叶燕华,林纾,马力文.甘肃河东春季透雨日期与海温的相关分析[J].干旱地区农业研究,2004,(1):18~22 |
| 甘肃河东春季透雨日期与海温的相关分析 |
| The effect of sea surface temperature on date of soaking rain in east Gansu |
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| DOI：10.7606/j.issn.1000-7601.2004.01.04 |
| 中文关键词: 春季透雨 海温 相关分析 河东 |
| 英文关键词:soaking rain variation features sea surface temperature (SST) correlation analysis east Gansu |
| 基金项目:兰州干旱气象研究所启动基金项目《黄土高原半干旱地区干旱的变化规律》； 甘肃省气象局青年科技基金(2000-8) |
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| 中文摘要: |
| 利用甘肃河东和宁夏回族自治区中南部1971～2000年67个站的春季第一场透雨日期资料,用EOF和REOF方法对其做了分解,进行了透雨日期的气候分区,分析了春季第一场透雨日期的时空分布特征,并计算了其与北太平洋海温的相关关系。结果表明,北部透雨平均日期与南部透雨平均日期具有相反的趋势,北部最迟在5月下旬,南部最早在4月中旬;20世纪70年代透雨日期偏迟,80年代透雨日期偏早,90年代偏迟。透雨早的年份,春季降水偏多,透雨迟的年份,春季降水偏少;透雨日期与北太平洋海温呈显著的负相关,当北太平洋地区的海温偏高时,甘肃河东春季透雨日期偏早。当北太平洋地区的海温偏低时,甘肃河东春季透雨日期偏迟。 |
| 英文摘要: |
| Based on the daily precipitation data at 67 stations in east Gansu and south Ningxia from 1971 to 2000, The paper discussed the features of the first soaking rain in spring with EOF and REOF method, divided up the climate regions, and analyzed the correlativity between it and sea surface temperature(SST) of North Pacific. It was indicated that the trend of the average date of soaking rain in the north part was contrary to that in the south part; the first soaking rain was relatively late in 1970's and 1990's, and early in 1980's; the spring precipitation; was higher in the years with early soaking rain than in the years with late soaking rain there was a negative correlationship between the date of first soaking rain and SST of North Pacific. i.e., the first soaking rain was early when SST of North Pacific was high, and it was late when SST of North Pacific was low. |
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