| 宁夏近44 a霜冻的气候变化特征 |
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| 引用本文： | 唐晶,张文煜,赵光平,白庆梅,王建英,张智.宁夏近44 a霜冻的气候变化特征[J].甘肃气象,2007,23(3):39-43. |
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| 作者姓名： | 唐晶 张文煜 赵光平 白庆梅 王建英 张智 |
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| 作者单位： | 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，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，宁夏气象台，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，宁夏吴忠气象台，宁夏气象台 甘肃兰州730000，宁夏吴忠气象台，宁夏吴忠751100，甘肃兰州730000，宁夏银川750002，甘肃兰州730000，宁夏吴忠751100，宁夏银川750002 |
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| 基金项目： | 宁夏自然科学基金项目(NZ0647)资助 |
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| 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。
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| 关 键 词： | 霜冻 次数 初、终霜日 变化特征 |
| 文章编号： | 1006-7639（2007）-03-0039-05 |
| 修稿时间： | 2007-08-03 |
Climate Change on Frost in Ningxia Region in Recent 44 Years |
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| TANG Jing,ZHANG Wenyu,ZHAO Guangping,BAI Qingmei,WANG Jianying,ZHANG Zhi.Climate Change on Frost in Ningxia Region in Recent 44 Years[J].Gansu Meteorology,2007,23(3):39-43. |
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| Authors: | TANG Jing ZHANG Wenyu ZHAO Guangping BAI Qingmei WANG Jianying ZHANG Zhi |
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| Institution: | 1. Key Laboratory of Arid Climatic Change and Reducing Disaster of Gansu Province;College of Atmospheric Sciences ,Lanzhou University, Lanzhou 730000, China; 2. Wuzhong Meteorological Bureau, Wuzhong 751100, China; 3. Ningxia Meteorological Observatory, Yinchuan 750002, China |
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| 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 was mainly in April and October,and the frost times was most in the second ten-day of April;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 annual mean frost times there was 8.7-10.8 times,and frost times was least in Tongxin for only 2.1 times.The frost times presented decreasing trend as a whole and it was obvious in June and autumn.The abrupt 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 of Ningxia region. |
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| Keywords: | frost times first(last) frost date variation character |
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