| 青海高原主要农业区50年初·终霜冻日变化特征及分布规律分析 |
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| 引用本文： | 汪青春,胡玲,刘宝康.青海高原主要农业区50年初·终霜冻日变化特征及分布规律分析[J].安徽农业科学,2012,40(33):16265-16269. |
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| 作者姓名： | 汪青春 胡玲 刘宝康 |
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| 作者单位： | 1. 青海省气候中心,青海西宁,810001
2. 青海省气象科学研究所,青海西宁,810001 |
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| 摘 要： | 选取青海东部农业区的西宁、大通、互助、乐都、民和、湟源、湟中、循化、化隆、贵德和尖扎11个站及柴达木盆地的都兰、诺木洪、大柴旦、格尔木、德令哈、冷湖、天峻、小灶火、茶卡9个站,用1961～2010年逐日最低气温资料,分2、0、-2℃3个温度等级,分析50年来初、终霜冻日及无霜期的变化趋势和年代际变化特征及分布规律。结果表明,20世纪80年代以后初霜冻日逐年推迟、终霜冻日逐年提前,无霜期延长,东部农业区进入21世纪这种情况最为明显,而柴达木盆地80年代最为明显;与60年代相比,21世纪以来初霜冻日推迟,终霜冻日提前,无霜期东部农业区延长20 d,柴达木盆地延长32 d,柴达木盆地初、终霜冻历年变化比东部农业区大,无霜期较东部农业区延长明显。
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| 关 键 词： | 日最低气温 初、终霜冻 变化特征 分布规律 |
The First and Last Frost Daily Change Characteristics and Distribution Regularity Analysis of Main Agricultural Area on Qinghai-Tibetan Plateau during the Last 5 Decades |
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| Institution: | WANG Qing-chun et al(Climate Center of Qinghai Province,Xining,Qinghai 810001) |
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| Abstract: | Selecting Xining,Datong,Huzhu,Ledu,Minghe,Huangyuan,Huangzhong,Xunhua,Hualong,Guide,Jianzha and other 11 meteorological stations in the eastern agricultural area,and Dulan,Nuomuhong,Dachaidan,Germu,Nenghu,Delingha,Tianjun,Dachaidan,Xiaozaohuo,Chaqia 9 Meteorological stations of the Chaidamu Basin of Qinghai province,with the daily minimum temperature data from 1961 to 2010,2 degrees,0 degrees,-2 degrees three temperature level,the changes trend and decadal change characteristics and distribution regulation of first frost dates and last frost dates in recent 50 years were analyzed.After 1980's,the first frost dates were delayed year after year,but the last frost dates were in advance year after year,frost-free period was prolonged,the eastern agricultural area was more apparent after 2010's,but Chaidamu Basin was more obvious in the 1980's;compared with 1960's,in the 2010's,the early frost dates were delayed,the late frost dates were in advance.by comparing the intensity of frost-free period,the eastern agricultural area extended 13-27 days,Chaidamu Basin extended 30-40 days,the change of the first and last frost dates for Chaidamu basin than that of the eastern agricultural areas,frost-free period is prolonged significantly in eastern agricultural area of Qinghai plateau. |
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| Keywords: | Daily minimum temperatures First and last frost date Change characteristics Distribution regulation |
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