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| 甘肃黄土高原地区春旱指标研究 | |
| 引用本文： | 李富洲,陈少勇,林纾.甘肃黄土高原地区春旱指标研究[J].干旱区资源与环境,2007,21(9):89-92. |
| 作者姓名： | 李富洲 陈少勇 林纾 |
| 作者单位： | 1. 兰州中心气象台,兰州,730020;白银市气象局,白银,730900 2. 白银市气象局,白银,730900 3. 兰州中心气象台,兰州,730020 |
| 摘 要： | 利用甘肃省甘肃黄土高原地区12个代表站1958~2003年春季3~5月逐候降水、蒸发资料,建立了该地区早春旱和晚春旱指数序列,确定了春旱等级标准,进一步分析了春旱的时空分布特征及其年际(年代际)变化规律。结果表明:(1)干旱指数能够连续动态地监测干旱过程,因而具有较好的代表性;(2)甘肃黄土高原地区早春旱和晚春旱北部高于南部,干旱中心在陇中;(3)重晚(早)春旱的发生频率增加(减少),站数增多(减少);(4)区域性早春旱随年代呈下降趋势,区域性晚春旱略有上升的趋势,但不明显。 |
| 关 键 词： | 春旱 干旱指数 气候变化 |
| 文章编号： | 1003-7578（2007）09-089-04 |
| 收稿时间： | 2006-08-08 |
| 修稿时间： | 2006-08-08 |
The Dry Indexes of Spring Drought of the Loess Plateau in Gansu Province |
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| LI Fu-zhou,CHENG Shao-yong,LIU Shu.The Dry Indexes of Spring Drought of the Loess Plateau in Gansu Province[J].Journal of Arid Land Resources and Environment,2007,21(9):89-92. | |
| Authors: | LI Fu-zhou CHENG Shao-yong LIU Shu |
| Institution: | 1. Central Meteorological Observatory of Lanzhou, Lanzhou 730020 ; 2. Meteorological Bureau of Baiyin, Baiyin 730900,China |
| Abstract: | The precipitation and evaporation data at 12 observational stations from 1958 to 2003 were used to calculate the spring drought index, the criterion of spring drought and the spring drought index series were set up, the spatial and temporal features, yearly and decadal climate variability of the indexes of the Loess Plateau in Gansu Province were analyzed. The results showed the drought index could successively and dynamically monitor the drought process, so it was the better representative;the frequency of spring drought of the Loess Plateau area in Gansu was stronger in north than in south and its center is in Gansu center;The frequency of serious late spring drought was increasing while that of early spring drought was decreasing. |
| Keywords: | spring drought Loess Plateau Gansu Province drought index climate variability |
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