Synoptic-to-Regional-Scale Analysis of Rainfall in the Atacama Desert (18°–26°S) Using a Long-Term Simulation with WRF
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Identification
| Title: | Main Title: Synoptic-to-Regional-Scale Analysis of Rainfall in the Atacama Desert (18°–26°S) Using a Long-Term Simulation with WRF |
| Description: | Abstract: In this study, reanalysis data and a long-term simulation with the regional climate model WRF (1982–2017;10 km resolution) is used to analyze synoptic and regional processes associated with rainfall events in the Atacama Desert. Five composites, each with 10 WRF-simulated rainfall events, are studied. They are selected based on a clustering and comprise the top winter events in South Atacama (23–26S), Southeast Atacama, and North Atacama (18–23S), and the top summer events in North Atacama and Northeast Atacama. Winter rainfall events in South Atacama are mostly associated with strong low pressure systems over the southeast Pacific and atmospheric rivers at their foreside, while cutoff lows occurring anomalously far north facilitate strong rainfall in North Atacama. Accordingly, tropical continental areas and the remote tropical and subtropical Pacific are identified as primary moisture sources, and moisture transport toward the Atacama Desert mainly takes place in the free troposphere (above 800 hPa). Strong summer rainfall events in North Atacama and Northeast Atacama are associated with a southward displaced Bolivian high. During rainfall events in North Atacama the high is shifted westward when compared to the Northeast Atacama events. Consequently, northern Chile is located at the northern periphery of the Bolivian high and the resulting strong easterlies may push strong convective systems from the Altiplano, toward the Atacama coast. Detailed analyses of individual rainfall events reveal that the most important synoptic patterns associated with rainfall not only control the synoptic-scale moisture transport into the Atacama Desert, but also decisively influence the regional atmospheric circulation. |
| Identifier: | 10.1175/MWR-D-20-0038.1 (DOI) |
Responsible Party
| Creators: | Mark Reyers (Author), Christoph Böhm (Author), Leon Knarr (Author), Yaping Shao (Author), Susanne Crewell (Author) |
| Publisher: | American Meteorological Society |
| Publication Year: | 2021 |
Topic
| CRC1211 Topic: | Climate |
| Related Subprojects: | A3, A1 |
| Subject: | Keyword: Climate Models |
| Geogr. Information Topic: | Climatology/Meteorology/Atmosphere |
File Details
| Filename: | 15200493-MonthlyWeatherReview.pdf |
| Data Type: | Data Paper - Publication |
| File Size: | 6.4 MB |
| Date: | Available: 23.12.2020 |
| Mime Type: | application/pdf |
| Data Format: | |
| Language: | English |
| Status: | Completed |
Constraints
| Download Permission: | Free |
| Download Information: | https://journals.ametsoc.org/view/journals/mwre/149/1/mwr-d-20-0038.1.xml |
| General Access and Use Conditions: | According to the CRC1211DB data policy agreement. |
| Access Limitations: | According to the CRC1211DB data policy agreement. |
| Licence: | None |
Geographic
Specific Information - Publication
| Publication Status: | In Print |
| Review Status: | Peer reviewed |
| Publication Type: | Article |
| Article Type: | Journal |
| Source: | Monthly Weather Review |
| Source Website: | https://journals.ametsoc.org/ |
| Issue: | 1 |
| Volume: | 149 |
| Number of Pages: | 22 (91 - 112) |
Metadata Details
| Metadata Creator: | Rovina Pinto |
| Metadata Created: | 15.06.2021 |
| Metadata Last Updated: | 30.11.2023 |
| Subproject: | A3 |
| Funding Phase: | 2 |
| Metadata Language: | English |
| Metadata Version: | V50 |
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Dataset Statistics
| Page Visits: | 285 |
| Metadata Downloads: | 39 |
| Dataset Downloads: | 8 |
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