| Analysis of the characteristics of droughts, heatwaves, and their compound events in Liaoning Province |
|
View Fulltext View/Add Comment Download reader |
| |
| DOI：10.7606/j.issn.1000-7601.2025.06.27 |
| Key Words: drought heat wave compound event temporal\|spatial characteristics Liaoning Province |
| Author Name | Affiliation | | JIANG Pengyi | College of Agriculture, Shenyang Agricultural University, Shenyang, Liaoning 110866, China
Liaoyang County Meteorological Bureau, Liaoyang, Liaoning 111200, China
Liaoyang City Meteorological Bureau, Liaoyang, Liaoning 111000, China | | LEI Juhan | College of Agriculture, Shenyang Agricultural University, Shenyang, Liaoning 110866, China | | YU Han | Liaoyang City Meteorological Bureau, Liaoyang, Liaoning 111000, China | | LI Yue | College of Agriculture, Shenyang Agricultural University, Shenyang, Liaoning 110866, China | | MA Mingze | Tieling County Meteorological Bureau, Tieling, Liaoning 112600, China | | ZHOU Shihao | Zhao County Meteorological Bureau, Shijiazhuang, Heibei 051530, China | | ZHANG Fengming | Liaoyang City Meteorological Bureau, Liaoyang, Liaoning 111000, China |
|
| Hits: 216 |
| Download times: 83 |
| Abstract: |
| 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. |
|
|
|