| 姜彭译,雷居翰,于涵,李玥,马鸣泽,周世豪,张凤鸣.辽宁省干旱、热浪及其复合事件的特征分析[J].干旱地区农业研究,2025,(6):282~291 |
| 辽宁省干旱、热浪及其复合事件的特征分析 |
| Analysis of the characteristics of droughts, heatwaves, and their compound events in Liaoning Province |
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| DOI：10.7606/j.issn.1000-7601.2025.06.27 |
| 中文关键词: 干旱 热浪 复合事件 时空特征 辽宁省 |
| 英文关键词:drought heat wave compound event temporal\|spatial characteristics Liaoning Province |
| 基金项目:国家自然科学基金项目（423050300)；辽宁省科技计划联合计划自然科学基金面上项目(2024-MSLHMSLH-234)；中国气象局沈阳大气环境研究所辽宁省农业气象灾害重点实验室联合开放基金(2023SYIAEKFMS24) |
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| 中文摘要: |
| 相较于单一极端事件，干旱-热浪复合事件对生态环境、人类健康、粮食安全等危害更加严重。利用1991—2022年辽宁省55个气象站逐日最高气温和逐日降水量资料，分析热浪、干旱及复合事件的变化特征。结果表明：（1）自20世纪90年代，辽宁省热浪频次变化波动较为显著，进入21世纪后波动减小。近10年辽宁省高温天气历时长且强度较高。空间上辽宁西北地区热浪发生频次高，增长趋势达0.65次·10a-1，为强度与历时的极大值区。（2）辽宁省干旱发生频次以3.0~4.0次·a-1为主，历时主要在1.0~1.5月·次-1之间，强度在1.5~2.0·次-1范围波动。辽西干旱发生频次高于辽东地区，空间上呈现出西部增长、东部降低趋势。干旱强度与历时分布趋势较为一致，从东南沿海向西北地区递增，但较强区域范围更广。（3）近32年来，仅1995年未发生复合事件，强度超过1.0·次-1的年份占比达12.5%。整体上复合事件占热浪频次的比例更高，朝阳市是复合事件发生的高频地区，达2.5次·a-1。全省复合事件强度较高，为0.7·次-1，且增长趋势超过0.03·10a-1。复合事件占干旱事件的比例由南向北依次递增，与占热浪事件百分比空间分布特征变化相反。 |
| 英文摘要: |
| Compared with the single extreme event, the drought and heat wave compound event causes more serious harm to the ecological environment, human health, and food security. The data of daily maximum temperature and daily precipitation of 55 weather stations in Liaoning Province from 1991 to 2022 were used to analyze the change characteristics of heat waves, droughts, and compound events in Liaoning Province. The results showed that (1) since the 1990s, the frequency of heat waves in Liaoning Province has fluctuated significantly, and it has decreased since the beginning of the 21st century. In the past 10 years, the high temperature weather in Liaoning Province not only lasted for a long time but also had a high intensity. Spatially, the frequency of heat waves in northwest Liaoning was high, with an increasing trend of 0.65 occurrences per decade, which was the maximum area of intensity and duration. (2) The occurrence frequency of droughts in Liaoning Province was mainly 3.0 to 4.0 times per year. The duration was mainly between 1.0 and 1.5 months. The intensity fluctuatedin the range from 1.5 to 2.0. Spatially, the frequency of droughts in western Liaoning was higher than that in eastern Liaoning, showing a trend of increasing in the west and decreasing in the east. The distribution of drought intensity was consistent with that of the duration, increasing from the southeast coast to the northwest region. But the areas with higher intensity were wider. (3) In the last 32 years, there was no compound event except in 1995. The percentage of years with intensity higher than was 12.5%. Spatially, Chaoyang city was a high\|frequency area where compound events occurred 2.5 times per year. The intensity of compound events across the province was relatively high at 0.7, with an increasing trend exceeding 0.03 per decade. The spatial distribution of the percentage of compound events in drought events increased from south to north, which was opposite to that in heat wave events. |
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