DOI: 10.1002/jgrd.50383
论文题名: Future changes in summertime precipitation amounts associated with topography in the Japanese islands
作者: Tsunematsu N. ; Dairaku K. ; Hirano J.
刊名: Journal of Geophysical Research Atmospheres
ISSN: 21698996
出版年: 2013
卷: 118, 期: 10 起始页码: 4142
结束页码: 4153
语种: 英语
英文关键词: dynamical downscaling
; future climate changes
; multi-model
; regional climate
; summertime precipitation
; topography
Scopus关键词: Air
; Atmospheric pressure
; Climate change
; Topography
; Daily precipitations
; Dynamical downscaling
; Future climate scenarios
; Multi-model
; Precipitation change
; Prevailing wind directions
; Regional climate
; Regional climate models
; Precipitation (meteorology)
; airflow
; atmospheric pressure
; climate modeling
; downscaling
; precipitation intensity
; pressure gradient
; regional climate
; summer
; topography
; troposphere
; wind direction
; Japan
英文摘要: This study investigates future changes in summertime precipitation amounts over the Japanese islands and their relations to the topographical heights by analyzing data from 20 km resolution regional climate model downscalings of MIROC3.2(hires) 20C3M and Special Report on Emission Scenarios A1B scenario data for the periods of 1981-2000 and 2081-2100. Results of the analyses indicate that future increases in June-July-August mean daily precipitation amounts are noticeable in the west and south sides (windward sides) of the mountainous regions, especially in western Japan where heavy rainfall is frequently observed in the recent climate. The large precipitation increases are likely to occur not only in high altitude areas but also at low altitudes where many urban areas are located. In such areas, the occurrence frequencies of precipitation amounts greater than 100 mm d-1 would also increase under the future climate scenario (A1B). One of the main causes of these precipitation changes appears to be the intensification of southwesterly moist air flows in the lower troposphere, which is likely to be associated with future increases in the north-south atmospheric pressure gradient, especially at latitudes south of 35°N. The intensified southwesterly moist air flows that impinge on the western and southern slopes of the mountains can generate stronger upslope flows and well-developed clouds, leading to increased precipitation. In contrast, future precipitation changes in the lee sides of the mountainous regions would be comparatively small. These results indicate that future precipitation changes strongly depend on the topography and prevailing wind direction. Key Points Relationship between future changes in summertime precipitation and topographyAnalyses of data from the three different regional climate modelsFinding as to the large influence of topography on future precipitation changes ©2013. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/63748
Appears in Collections: 影响、适应和脆弱性 气候减缓与适应
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作者单位: Disaster Risk Research Unit, National Research Institute for Earth Science and Disaster Prevention, 3-1, Tennodai, Tsukuba, Ibaraki, 3050006, Japan
Recommended Citation:
Tsunematsu N.,Dairaku K.,Hirano J.. Future changes in summertime precipitation amounts associated with topography in the Japanese islands[J]. Journal of Geophysical Research Atmospheres,2013-01-01,118(10)