Impacts of Solar Radiation Management on Hydro-Climatic Extremes in Southeast Asia
Solar radiation management (SRM), or solar geoengineering, reduces the earth’s temperature by reflecting more sunlight back to space. However, the impacts of SRM remain unclear, making it difficult to project the benefits as well as consequences should this approach be adopted to combat climate chan...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-03-01
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| Series: | Water |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2073-4441/15/6/1089 |
| _version_ | 1797608532156088320 |
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| author | Mou Leong Tan Liew Juneng Heri Kuswanto Hong Xuan Do Fei Zhang |
| author_facet | Mou Leong Tan Liew Juneng Heri Kuswanto Hong Xuan Do Fei Zhang |
| author_sort | Mou Leong Tan |
| collection | DOAJ |
| description | Solar radiation management (SRM), or solar geoengineering, reduces the earth’s temperature by reflecting more sunlight back to space. However, the impacts of SRM remain unclear, making it difficult to project the benefits as well as consequences should this approach be adopted to combat climate change. To provide novel insight into the SRM impact on hydro-climatic extremes in Southeast Asia, this study conducts a simulation experiment for the Kelantan River Basin (KRB) in Malaysia by incorporating three bias-corrected Stratospheric Aerosol Geoengineering Large Ensemble (GLENS) members into the Soil and Water Assessment Tool Plus (SWAT+) model. The study found that SRM practices could generate substantial cooling effects on regional temperatures, leading to a reduction in projected annual precipitation and monthly precipitation during the flooding season (from November to mid-January) under SRM relative to the Representative Concentration Pathway 8.5 (RCP8.5) scenario. In addition, SRM could reduce the number of days with heavy precipitation as well as the intensity of maximum daily precipitation as compared to RCP8.5, during the 2045–2064 and 2065–2084 periods, leading to a reduction in high flows. Nevertheless, under SRM impacts, the driest months from February to May would experience comparable decreases in monthly precipitation and streamflow. |
| first_indexed | 2024-03-11T05:45:41Z |
| format | Article |
| id | doaj.art-5141edb1f80444fd88ae505a93ed1f96 |
| institution | Directory Open Access Journal |
| issn | 2073-4441 |
| language | English |
| last_indexed | 2024-03-11T05:45:41Z |
| publishDate | 2023-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Water |
| spelling | doaj.art-5141edb1f80444fd88ae505a93ed1f962023-11-17T14:26:18ZengMDPI AGWater2073-44412023-03-01156108910.3390/w15061089Impacts of Solar Radiation Management on Hydro-Climatic Extremes in Southeast AsiaMou Leong Tan0Liew Juneng1Heri Kuswanto2Hong Xuan Do3Fei Zhang4GeoInformatic Unit, Geography Section, School of Humanities, Universiti Sains Malaysia, Penang 11800, MalaysiaDepartment of Earth Sciences and Environment, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, Bangi 43600, MalaysiaCentre for Disaster Mitigation and Climate Change, Institut Teknologi Sepuluh Nopember, Surabaya 60111, IndonesiaFaculty of Environment and Natural Resources, Nong Lam University—Ho Chi Minh City, Ho Chi Minh City 700000, VietnamCollege of Geography and Environmental Sciences, Zhejiang Normal University, Jinhua 321004, ChinaSolar radiation management (SRM), or solar geoengineering, reduces the earth’s temperature by reflecting more sunlight back to space. However, the impacts of SRM remain unclear, making it difficult to project the benefits as well as consequences should this approach be adopted to combat climate change. To provide novel insight into the SRM impact on hydro-climatic extremes in Southeast Asia, this study conducts a simulation experiment for the Kelantan River Basin (KRB) in Malaysia by incorporating three bias-corrected Stratospheric Aerosol Geoengineering Large Ensemble (GLENS) members into the Soil and Water Assessment Tool Plus (SWAT+) model. The study found that SRM practices could generate substantial cooling effects on regional temperatures, leading to a reduction in projected annual precipitation and monthly precipitation during the flooding season (from November to mid-January) under SRM relative to the Representative Concentration Pathway 8.5 (RCP8.5) scenario. In addition, SRM could reduce the number of days with heavy precipitation as well as the intensity of maximum daily precipitation as compared to RCP8.5, during the 2045–2064 and 2065–2084 periods, leading to a reduction in high flows. Nevertheless, under SRM impacts, the driest months from February to May would experience comparable decreases in monthly precipitation and streamflow.https://www.mdpi.com/2073-4441/15/6/1089climate changesolar radiation managementgeoengineeringhydrologyfloodSWAT+ |
| spellingShingle | Mou Leong Tan Liew Juneng Heri Kuswanto Hong Xuan Do Fei Zhang Impacts of Solar Radiation Management on Hydro-Climatic Extremes in Southeast Asia Water climate change solar radiation management geoengineering hydrology flood SWAT+ |
| title | Impacts of Solar Radiation Management on Hydro-Climatic Extremes in Southeast Asia |
| title_full | Impacts of Solar Radiation Management on Hydro-Climatic Extremes in Southeast Asia |
| title_fullStr | Impacts of Solar Radiation Management on Hydro-Climatic Extremes in Southeast Asia |
| title_full_unstemmed | Impacts of Solar Radiation Management on Hydro-Climatic Extremes in Southeast Asia |
| title_short | Impacts of Solar Radiation Management on Hydro-Climatic Extremes in Southeast Asia |
| title_sort | impacts of solar radiation management on hydro climatic extremes in southeast asia |
| topic | climate change solar radiation management geoengineering hydrology flood SWAT+ |
| url | https://www.mdpi.com/2073-4441/15/6/1089 |
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