Impacts of Ozone Changes in the Tropopause Layer on Stratospheric Water Vapor
Stratospheric water vapor (SWV) changes play an important role in regulating global climate change, and its variations are controlled by tropopause temperature. This study estimates the impacts of tropopause layer ozone changes on tropopause temperature by radiative process and further influences on...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-02-01
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| Series: | Atmosphere |
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| Online Access: | https://www.mdpi.com/2073-4433/12/3/291 |
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| author | Jinpeng Lu Fei Xie Hongying Tian Jiali Luo |
| author_facet | Jinpeng Lu Fei Xie Hongying Tian Jiali Luo |
| author_sort | Jinpeng Lu |
| collection | DOAJ |
| description | Stratospheric water vapor (SWV) changes play an important role in regulating global climate change, and its variations are controlled by tropopause temperature. This study estimates the impacts of tropopause layer ozone changes on tropopause temperature by radiative process and further influences on lower stratospheric water vapor (LSWV) using the Whole Atmosphere Community Climate Model (WACCM4). It is found that a 10% depletion in global (mid-low and polar latitudes) tropopause layer ozone causes a significant cooling of the tropical cold-point tropopause with a maximum cooling of 0.3 K, and a corresponding reduction in LSWV with a maximum value of 0.06 ppmv. The depletion of tropopause layer ozone at mid-low latitudes results in cooling of the tropical cold-point tropopause by radiative processes and a corresponding LSWV reduction. However, the effect of polar tropopause layer ozone depletion on tropical cold-point tropopause temperature and LSWV is opposite to and weaker than the effect of tropopause layer ozone depletion at mid-low latitudes. Finally, the joint effect of tropopause layer ozone depletion (at mid-low and polar latitudes) causes a negative cold-point tropopause temperature and a decreased tropical LSWV. Conversely, the impact of a 10% increase in global tropopause layer ozone on LSWV is exactly the opposite of the impact of ozone depletion. After 2000, tropopause layer ozone decreased at mid-low latitudes and increased at high latitudes. These tropopause layer ozone changes at different latitudes cause joint cooling in the tropical cold-point tropopause and a reduction in LSWV. Clarifying the impacts of tropopause layer ozone changes on LSWV clearly is important for understanding and predicting SWV changes in the context of future global ozone recovery. |
| first_indexed | 2024-03-09T00:34:47Z |
| format | Article |
| id | doaj.art-a6a44002ed6246adad58b2475132084e |
| institution | Directory Open Access Journal |
| issn | 2073-4433 |
| language | English |
| last_indexed | 2024-03-09T00:34:47Z |
| publishDate | 2021-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Atmosphere |
| spelling | doaj.art-a6a44002ed6246adad58b2475132084e2023-12-11T18:16:12ZengMDPI AGAtmosphere2073-44332021-02-0112329110.3390/atmos12030291Impacts of Ozone Changes in the Tropopause Layer on Stratospheric Water VaporJinpeng Lu0Fei Xie1Hongying Tian2Jiali Luo3Change and Earth System Science, Beijing Normal University, Beijing 100000, ChinaChange and Earth System Science, Beijing Normal University, Beijing 100000, ChinaKey Laboratory for Semi-Arid Climate Change of the Ministry of Education, College of Atmospheric Sciences, Lanzhou University, Lanzhou 730000, ChinaKey Laboratory for Semi-Arid Climate Change of the Ministry of Education, College of Atmospheric Sciences, Lanzhou University, Lanzhou 730000, ChinaStratospheric water vapor (SWV) changes play an important role in regulating global climate change, and its variations are controlled by tropopause temperature. This study estimates the impacts of tropopause layer ozone changes on tropopause temperature by radiative process and further influences on lower stratospheric water vapor (LSWV) using the Whole Atmosphere Community Climate Model (WACCM4). It is found that a 10% depletion in global (mid-low and polar latitudes) tropopause layer ozone causes a significant cooling of the tropical cold-point tropopause with a maximum cooling of 0.3 K, and a corresponding reduction in LSWV with a maximum value of 0.06 ppmv. The depletion of tropopause layer ozone at mid-low latitudes results in cooling of the tropical cold-point tropopause by radiative processes and a corresponding LSWV reduction. However, the effect of polar tropopause layer ozone depletion on tropical cold-point tropopause temperature and LSWV is opposite to and weaker than the effect of tropopause layer ozone depletion at mid-low latitudes. Finally, the joint effect of tropopause layer ozone depletion (at mid-low and polar latitudes) causes a negative cold-point tropopause temperature and a decreased tropical LSWV. Conversely, the impact of a 10% increase in global tropopause layer ozone on LSWV is exactly the opposite of the impact of ozone depletion. After 2000, tropopause layer ozone decreased at mid-low latitudes and increased at high latitudes. These tropopause layer ozone changes at different latitudes cause joint cooling in the tropical cold-point tropopause and a reduction in LSWV. Clarifying the impacts of tropopause layer ozone changes on LSWV clearly is important for understanding and predicting SWV changes in the context of future global ozone recovery.https://www.mdpi.com/2073-4433/12/3/291tropopause layer ozonestratospheric water vaportropopause temperature |
| spellingShingle | Jinpeng Lu Fei Xie Hongying Tian Jiali Luo Impacts of Ozone Changes in the Tropopause Layer on Stratospheric Water Vapor Atmosphere tropopause layer ozone stratospheric water vapor tropopause temperature |
| title | Impacts of Ozone Changes in the Tropopause Layer on Stratospheric Water Vapor |
| title_full | Impacts of Ozone Changes in the Tropopause Layer on Stratospheric Water Vapor |
| title_fullStr | Impacts of Ozone Changes in the Tropopause Layer on Stratospheric Water Vapor |
| title_full_unstemmed | Impacts of Ozone Changes in the Tropopause Layer on Stratospheric Water Vapor |
| title_short | Impacts of Ozone Changes in the Tropopause Layer on Stratospheric Water Vapor |
| title_sort | impacts of ozone changes in the tropopause layer on stratospheric water vapor |
| topic | tropopause layer ozone stratospheric water vapor tropopause temperature |
| url | https://www.mdpi.com/2073-4433/12/3/291 |
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