J4 ›› 2007, Vol. 25 ›› Issue (3): 39-43.

• 论文 • 上一篇    下一篇

宁夏近44 a霜冻的气候变化特征

唐 晶1, 2 ,张文煜1 ,赵光平3 ,白庆梅1 ,王建英2 ,张 智3   

  1. 1. 兰州大学大气科学学院,甘肃省干旱气候变化与减灾重点实验室,甘肃 兰州 730000;2. 宁夏吴忠气象台,宁夏 吴忠 751100; 3. 宁夏气象台,宁夏 银川 750002
  • 收稿日期:2007-08-03 修回日期:2007-09-04 出版日期:2007-09-30 发布日期:2007-09-30
  • 作者简介:唐晶(1966 - ) ,女,河南驻马店人,工程师,主要从事短期预报及气候研究. E - mail: tanjing3567@163. com
  • 基金资助:

    宁夏自然科学基金项目(NZ0647)资助

Climate Change on Frostin Ningx ia Reg ion in Recent 44 Years

TANG J ing1,2 , ZHANGWenyu1 , ZHAO Guangp ing3 , BA IQingmei1 , WANG J ianying2 , ZHANG Zhi3   

  1. 1. Key Laboratory of A rid Clim atic Change and Reducing D isaster of Gansu Province; College of A tm ospheric Sciences, Lanzhou University, Lanzhou 730000, China; 2. W uzhong M eteorological B ureau, W uzhong 751100,China; 3. N ingx ia M eteorological Observatory, Yinchuan 750002, China
  • Received:2007-08-03 Revised:2007-09-04 Online:2007-09-30 Published:2007-09-30

摘要:

对宁夏1961~2004年间霜冻发生次数、霜期的变化特征进行了分析,结果表明:宁夏霜冻发生主要集中在4月和10月,出现次数4月中旬最多,春季霜冻明显多于秋季;发生次数南北差异较大,宁南山区发生频率较高,年平均发生次数达8. 7~10. 8次。同心出现次数最少,年平均只有2. 1次;霜冻发生次数阶段性变化呈“1升1降”和“1升2降”分布,总体呈下降趋势,其中6月、秋季下降趋势明显。霜冻年发生次数的跃变点是1984年,跃变年以后霜冻发生次数明显减少; 3个区域的气候变化趋势均为初霜日逐渐推迟,终霜日逐渐提前,无霜期逐渐延长。

关键词: 霜冻, 次数, 初、终霜日, 变化特征

Abstract:

The variation characteritics of frost times and period in Ningxia region from 1961 to 2004 were analyzed. The results show that frost occurring in Ningxia wasmainly in Ap ril and October, and the frost times wasmost in the second ten - day of Ap ril; in the south and north of Ningxia region, the frost times was different significantly, and frost occurred frequently in mountainous region of South Ningxia; the annualmean frost times there was 8. 7 - 10. 8 times, and frost times was least in Tongxin for only 2. 1 times. The frost times p resented decreasing trend as a whole and itwas obvious in June and autumn. The abrup t of frost times occurred in 1984,and after 1984 the frost times reduced significantly. The first frost date was delayed and the last frost date advanced, as well as the frostless period was extended gradually in the three areas ofNingxia region.

Key words:  frost, times, first ( last) frost date, variation character

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