Impact of Interaction between Metropolitan Area and Shallow Lake on Daily Extreme Precipitation over Eastern China
Both cities and lakes have significant impacts on regional precipitation. With global warming, extreme precipitation events in Eastern China have increased significantly, and the single/joint influences of metropolises and lakes on extreme precipitation still need to be quantitatively evaluated. To...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-02-01
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| Series: | Atmosphere |
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| Online Access: | https://www.mdpi.com/2073-4433/13/2/306 |
| _version_ | 1827657084019146752 |
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| author | Zhe Li Yanhong Gao |
| author_facet | Zhe Li Yanhong Gao |
| author_sort | Zhe Li |
| collection | DOAJ |
| description | Both cities and lakes have significant impacts on regional precipitation. With global warming, extreme precipitation events in Eastern China have increased significantly, and the single/joint influences of metropolises and lakes on extreme precipitation still need to be quantitatively evaluated. To reveal the impact of the single/joint influences of metropolises and lakes on the shear line torrential rain process, the Suzhou-Wuxi-Changzhou Metropolitan Area (SXCMA) and Lake Taihu in Eastern China were selected as the study area. Utilizing a WRF model, comparative studies of sensitivity simulations were conducted for the two typical extreme precipitation events caused by the low-level shear line (LLSL) on 27 June 2015 (EP627) and 25 September 2017 (EP925). Both results show that the existence of Lake Taihu and SXCMA will increase precipitation in the study area. SXCMA has a more obvious effect on enhancing precipitation, which is about twice the effect of Lake Taihu. SXCMA mainly strengthens the intensity and movement of the surface convergence line (SCL) in the study area and indirectly affects the shift of the LLSL, which finally affects the intensity and location of precipitation. Lake Taihu affects the intensity and movement of SCL, triggering ground vertical convections due to lower surface roughness, and acts as a land-lake breeze and water vapor source, which will affect the distribution and intensity of precipitation. |
| first_indexed | 2024-03-09T22:37:21Z |
| format | Article |
| id | doaj.art-05a0d5340f5d4be48b4d446b5e203f7f |
| institution | Directory Open Access Journal |
| issn | 2073-4433 |
| language | English |
| last_indexed | 2024-03-09T22:37:21Z |
| publishDate | 2022-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Atmosphere |
| spelling | doaj.art-05a0d5340f5d4be48b4d446b5e203f7f2023-11-23T18:45:35ZengMDPI AGAtmosphere2073-44332022-02-0113230610.3390/atmos13020306Impact of Interaction between Metropolitan Area and Shallow Lake on Daily Extreme Precipitation over Eastern ChinaZhe Li0Yanhong Gao1Key Laboratory of Land Surface Process and Climate Change in Cold and Arid Regions, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, ChinaInstitute of Atmospheric Sciences, Department of Atmospheric and Oceanic Sciences, Fudan University, Shanghai 200438, ChinaBoth cities and lakes have significant impacts on regional precipitation. With global warming, extreme precipitation events in Eastern China have increased significantly, and the single/joint influences of metropolises and lakes on extreme precipitation still need to be quantitatively evaluated. To reveal the impact of the single/joint influences of metropolises and lakes on the shear line torrential rain process, the Suzhou-Wuxi-Changzhou Metropolitan Area (SXCMA) and Lake Taihu in Eastern China were selected as the study area. Utilizing a WRF model, comparative studies of sensitivity simulations were conducted for the two typical extreme precipitation events caused by the low-level shear line (LLSL) on 27 June 2015 (EP627) and 25 September 2017 (EP925). Both results show that the existence of Lake Taihu and SXCMA will increase precipitation in the study area. SXCMA has a more obvious effect on enhancing precipitation, which is about twice the effect of Lake Taihu. SXCMA mainly strengthens the intensity and movement of the surface convergence line (SCL) in the study area and indirectly affects the shift of the LLSL, which finally affects the intensity and location of precipitation. Lake Taihu affects the intensity and movement of SCL, triggering ground vertical convections due to lower surface roughness, and acts as a land-lake breeze and water vapor source, which will affect the distribution and intensity of precipitation.https://www.mdpi.com/2073-4433/13/2/306extreme precipitationmetropolitan areashallow lake |
| spellingShingle | Zhe Li Yanhong Gao Impact of Interaction between Metropolitan Area and Shallow Lake on Daily Extreme Precipitation over Eastern China Atmosphere extreme precipitation metropolitan area shallow lake |
| title | Impact of Interaction between Metropolitan Area and Shallow Lake on Daily Extreme Precipitation over Eastern China |
| title_full | Impact of Interaction between Metropolitan Area and Shallow Lake on Daily Extreme Precipitation over Eastern China |
| title_fullStr | Impact of Interaction between Metropolitan Area and Shallow Lake on Daily Extreme Precipitation over Eastern China |
| title_full_unstemmed | Impact of Interaction between Metropolitan Area and Shallow Lake on Daily Extreme Precipitation over Eastern China |
| title_short | Impact of Interaction between Metropolitan Area and Shallow Lake on Daily Extreme Precipitation over Eastern China |
| title_sort | impact of interaction between metropolitan area and shallow lake on daily extreme precipitation over eastern china |
| topic | extreme precipitation metropolitan area shallow lake |
| url | https://www.mdpi.com/2073-4433/13/2/306 |
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