{"title":"Relationship between Cold-Air Damming and Heavy Precipitation in the Kanto Region","authors":"Ryota Ohara, Takeshi Yamazaki","doi":"10.2151/sola.2024-035","DOIUrl":null,"url":null,"abstract":"</p><p>In this study, we detected and analyzed cold air damming (CAD) and precipitation occurrences spanning 40 years from 1980 to 2019 in the Kanto region. We explored the climatological relationship between CAD and heavy precipitation. Of the 13.5 CAD events per year, 4.0 were associated with 24-h precipitation of 100 mm or more. In the southern Kanto region except for the western mountainous area, more than 25% of heavy precipitation was related to CAD, reaching over 40% in parts of the Boso Peninsula. CAD events with heavy precipitation exhibited consistent characteristics throughout seasons, including (1) a pronounced pressure gradient between the well-developed low-pressure off the southern coast of western Japan and the high-pressure on the northeast side of Japan, and (2) a strong moisture influx toward the Kanto region. These features highlight the crucial and general mechanisms of heavy precipitation formation through significant moisture ascent over the cold air dammed over the Kanto region.</p>\n<p></p>","PeriodicalId":49501,"journal":{"name":"Sola","volume":"24 1","pages":""},"PeriodicalIF":1.7000,"publicationDate":"2024-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Sola","FirstCategoryId":"89","ListUrlMain":"https://doi.org/10.2151/sola.2024-035","RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"METEOROLOGY & ATMOSPHERIC SCIENCES","Score":null,"Total":0}
引用次数: 0
Abstract
In this study, we detected and analyzed cold air damming (CAD) and precipitation occurrences spanning 40 years from 1980 to 2019 in the Kanto region. We explored the climatological relationship between CAD and heavy precipitation. Of the 13.5 CAD events per year, 4.0 were associated with 24-h precipitation of 100 mm or more. In the southern Kanto region except for the western mountainous area, more than 25% of heavy precipitation was related to CAD, reaching over 40% in parts of the Boso Peninsula. CAD events with heavy precipitation exhibited consistent characteristics throughout seasons, including (1) a pronounced pressure gradient between the well-developed low-pressure off the southern coast of western Japan and the high-pressure on the northeast side of Japan, and (2) a strong moisture influx toward the Kanto region. These features highlight the crucial and general mechanisms of heavy precipitation formation through significant moisture ascent over the cold air dammed over the Kanto region.
期刊介绍：
SOLA (Scientific Online Letters on the Atmosphere) is a peer-reviewed, Open Access, online-only journal. It publishes scientific discoveries and advances in understanding in meteorology, climatology, the atmospheric sciences and related interdisciplinary areas. SOLA focuses on presenting new and scientifically rigorous observations, experiments, data analyses, numerical modeling, data assimilation, and technical developments as quickly as possible. It achieves this via rapid peer review and publication of research letters, published as Regular Articles.
Published and supported by the Meteorological Society of Japan, the journal follows strong research and publication ethics principles. Most manuscripts receive a first decision within one month and a decision upon resubmission within a further month. Accepted articles are then quickly published on the journal’s website, where they are easily accessible to our broad audience.
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