期刊
JOURNAL OF CLIMATE
卷 29, 期 3, 页码 1231-1236出版社
AMER METEOROLOGICAL SOC
DOI: 10.1175/JCLI-D-15-0484.1
关键词
Geographic location; entity; Tropics; Atm; Ocean Structure; Phenomena; Monsoons; Precipitation; Physical Meteorology and Climatology; Climatology; Coastal meteorology
资金
- Grants-in-Aid for Scientific Research [15K01167] Funding Source: KAKEN
Motivated by observational evidence of rainfall concentrations near tropical coastlines with a diurnal cycle, the annual mean precipitation amount was quantified in the tropics (latitudes lower than 37 degrees) obtained as a function of coastal distance and compared between land and ocean sides. The data are from the Tropical Rainfall Measuring Mission (TRMM). Precipitation amount peaks at the coastline and decreases rapidly over a distance of 300 km from the coastline on both sides of the coastline. The precipitation inside the coastal region (defined by a distance <300 km from the coastline) accounts for approximately 34% of the total over the entire tropics, while that outside the coastal region accounts for 52% and 14% on the ocean and land sides, respectively. Since the coastal regions are about 29% of the total tropical areas, the precipitation per unit area inside the coastal regions is higher than that outside. Examining the grid number variation in the coastal regions with respect to the annual precipitation amount resulted in the finding that more than 90% of the annual precipitation with the amount of 3500 mm yr(-1) or more occurs exclusively in the coastal regions, indicating that precipitation systems unique to coastal regions are needed for producing the highest annual precipitation on Earth.
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