| 1961-2012年辽宁省极端气温事件气候变化特征 |
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| 引用本文： | 周晓宇,赵春雨,王颖,崔妍,张新宜,胡春丽,林蓉.1961-2012年辽宁省极端气温事件气候变化特征[J].冰川冻土,2015,37(4):876-887. |
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| 作者姓名： | 周晓宇 赵春雨 王颖 崔妍 张新宜 胡春丽 林蓉 |
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| 作者单位： | 1. 沈阳区域气候中心, 辽宁 沈阳 110166;2. 湖北省黄石市气象局, 湖北 黄石 435002;3. 辽宁省气象科学研究所, 辽宁 沈阳 110166 |
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| 基金项目： | 公益性行业(气象)科研专项，中国气象局气候变化专项，2015年辽宁省气象局第4号科研课题资助 |
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| 摘 要： | 利用辽宁省52个气象台站逐日平均气温、 最高气温和最低气温数据, 使用国际通用的10种极端气候指数, 研究了1961-2012年辽宁省极端气温事件的气候变化特征. 结果表明: 年平均极端气温事件空间分布存在明显的地区差异. 时间尺度上, 1961-2012年辽宁省年及四季极端暖事件(暖昼日数、 暖夜日数、 夏季日数、 热带夜数和热浪持续指数)呈增加趋势, 极端冷事件(冷昼日数、 冷夜日数、 结冰日数、 霜冻日数和寒潮持续指数)呈减少趋势; 极端暖事件在20世纪90年代中期开始明显增加, 极端冷事件在20世纪80年代末期开始显著减少; 极端暖事件的变化速率要小于极端冷事件. 辽宁省气温日较差有增大的趋势, 极端暖(冷)事件的增加(减少)在秋季(冬季)最为显著. 空间变化上, 极端气温事件在全省基本都呈一致的增加或减少的分布. 多数极端气温事件均存在8 a左右的周期, 检测到的突变的时间大致在20世纪80年代中期到90年代末期. 20世纪80年代末期辽宁省气候变暖后, 极端暖事件和冷事件均有明显的增加和减少.
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| 关 键 词： | 辽宁省 极端气温指数 变化特征 |
| 收稿时间： | 2015-02-01 |
| 修稿时间： | 2015-06-02 |
Variation characteristics of extreme temperature events in Liaoning Province, 1961-2012 |
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| ZHOU Xiaoyu,ZHAO Chunyu,WANG Ying,CUI Yan,ZHANG Xinyi,HU Chunli,LIN Rong.Variation characteristics of extreme temperature events in Liaoning Province, 1961-2012[J].Journal of Glaciology and Geocryology,2015,37(4):876-887. |
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| Authors: | ZHOU Xiaoyu ZHAO Chunyu WANG Ying CUI Yan ZHANG Xinyi HU Chunli LIN Rong |
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| Institution: | 1. Regional Climate Center of Shenyang, Shenyang 110166, China;2. Huangshi Meteorological Administration, Huangshi 435002, Hubei, China;3. Institute of Meteorological Science of Liaoning, Shenyang 110166, China |
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| Abstract: | Based on the daily average, maximum and minimum temperature from 52 meteorological stations in Liaoning Province, the variation characteristics of the extreme temperature events are analyzed using ten extreme temperature indices, which are commonly used abroad. The results show that the distribution of the annual average extreme temperature events have obvious regional differences. Temporally, the extreme warm events (warm days, warm nights, summer days, tropical nights, heat wave last indices) have increasing trends and the extreme cold events (cool days, cool nights, freeze days, frost days, cold snap last indices) have decreasing trends during 1961-2012; the extreme warm events had markedly increased in the mid-1990s and the extreme cold events had markedly decreased in the late 1980s; the changing rates of extreme warm events are less than that of the extreme cold events; the diurnal temperature range has an increasing trend in the province; the increasing (decreasing) trends of the extreme warm (cold) events are more significant in autumn (winter). Spatially, the extreme temperature events almost are increasing or decreasing coincidently in the province. Most extreme temperature events have about 8-years period of oscillation. Abrupt change had taken place in the mid-1980s to the late 1990s. In Liaoning Province, after the climate warming beginning from the late 1980s, the extreme warm events and cold events have all significantly increased and decreased. |
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| Keywords: | Liaoning Province extreme temperature indices variation characteristics |
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