An Observational Study on Land and Sea Breezes in the Tokai Village Area

Mizuma, Mitsuo; Kakuta, Michio

doi:10.2151/jmsj1965.52.5_417

Cited by 8 publications

(7 citation statements)

References 20 publications

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“…We can clearly see the return current with respect to the oceanward wind and there is no return current with respect to the bayward wind. These features on the east coast are similar to those observed by Mizuma (1985). Next, we will show wind hodographs at several sites in Fig.…”

Section: Results and Discussion (A) Results For The Standard Baysupporting

confidence: 77%

“…It is important to examine the differences and their causes. Second, the ocean and Lo breezes are of considerable depths on the east coast (e.g., Mizuma, 1985). Namely, the depths of the ocean and Lo breezes are about 1100m and 800m, respectively, which are much greater than those of sea and land breezes observed in general (Hsu, 1970;Lyons, 1972;and many others).…”

Section: Introductionmentioning

confidence: 95%

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Numerical Experiments on the Interaction of Ocean and Bay Breezes

Itoh

Sugimura

1989

Journal of the Meteorological Society of Japan

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Section: Results and Discussion (A) Results For The Standard Baysupporting

confidence: 77%

Section: Introductionmentioning

confidence: 95%

Numerical Experiments on the Interaction of Ocean and Bay Breezes

Itoh

Sugimura

1989

Journal of the Meteorological Society of Japan

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“…Under clear-sky and calm conditions, this wind system, having a vertical scale of @1 km, will entirely cover the Kinki region from Kii Channel, from late afternoon to midnight (Itoh and Kawazoe 1983;Mizuma 1985). Itoh suggested that the relative locations of the Japan Sea and the Kii and Tsurugi mountain districts produced a large-scale horizontal pressure-gradient, which resulted in the formation of the extended seabreeze.…”

Section: The Extended Sea-breezementioning

confidence: 99%

“…For convenience, the northern portion of the Osaka plain, including the Kyoto basin area, is hereinafter referred to as the OsakaKyoto plain. The effects of the urban area on the structure and behavior of the local circulations in this region have not been well established, although observational and numerical studies were so far conducted by a number of researchers (e.g., Eguchi 1977;Mizuma 1995;Itoh 1995;Uno et al 1996). Ohashi and Kida (2001) observed the structure of the SBC over the northern Osaka urban area, and suggested that the deformation of the SBC was due to this urban area.…”

Section: Introductionmentioning

confidence: 99%

Effects of Mountains and Urban Areas on Daytime Local-Circulations in the Osaka and Kyoto Regions

Ohashi

Kida

2002

Journal of the Meteorological Society of Japan

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In the current study, the effects of topography and urbanization on the daytime local-circulations in the area of the Osaka-Kyoto plain were investigated using a mesoscale atmospheric model. The main results obtained from the numerical and observational data analyses are as follows:1) The stagnation of the inland penetration of the sea-breeze front that occurs in the peripheral portion of the Tokyo urban area does not clearly occur in the peripheral portion of the Osaka urban area. The stagnation is attributed to the heat-island circulation that develops over the peripheral portion of the urban area. Because the northern peripheral portion of the Osaka urban area faces mountains, the valley circulation weakens the heat-island circulation; the about 600-m mountains surrounding the Osaka and Kyoto urban areas are the most suitable to cause the weakening of the heat-island circulation. The valley circulation also induces the surface-air-temperature increase over the plain, through an adiabatic process due to its downward flow; the temperature increase strengthens the horizontal pressure gradient between the sea-breeze circulation and inland areas.2) The surface air over the suburban region between the Osaka and Kyoto urban areas remains drier than that over the Osaka and Kyoto urban areas, until the arrival of the sea-breeze front, even though urban areas were thought to be drier than suburban areas. This dryness results from the fact that the valley circulation transports drier air downward from the upper levels over the suburban area, and transports the surface-air moisture supplied from the ground surface into mountainous areas. The valley circulation also appears to play an important role in the transport of pollutants from the suburban area into mountainous areas.3) A chain flow, which flows downward from the upper levels over the Osaka urban area to the lower levels over the Kyoto urban area, forms ahead of the sea-breeze front. This flow can result in the transport of pollutants emitted from the Osaka urban area into the inland Kyoto area prior to the transport of pollutants by the sea-breeze circulation. Additionally, the chain flow intensifies the downward flow of the valley circulation over the suburban region between the Osaka and Kyoto urban areas.

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“…Visual inspection of the daily wind maps leads to the type classification of the diurnal variation of winds. Since there have been several observational studies of the L&SB in the coastal area of Osaka Bay (Itoh and Kawazoe, 1983;Mizuma, 1985), the behavior of the L&SB has been clarified to a considerable degree. Therefore, the occurrence of the L&SB can be easily determined on the daily wind map.…”

Section: Classification Of Land and Sea Breezes Typesmentioning

confidence: 99%

General Aspects of Land and Sea Breezes in Osaka Bay and Surrounding Area

Mizuma

1995

Journal of the Meteorological Society of Japan

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The general aspects of land and sea breezes in the Osaka Bay area and its environment are revealed from an analysis of the wind data obtained by the AMeDAS. The study area consists of a complex land-sea configuration and a complex topography which includes plains, hilly terrain, and mountainous regions. The land and sea breezes are classified into five types according to the behavior of the sea breeze at several locations in the study area.The most frequently occurring type is characterized in the following. Along the southern coast of Osaka Bay, the sea breeze from Osaka Bay changes with time into that from the Kui Channel. At the same time, along the coast of the Seto Inland Sea the sea breeze contains a predominant easterly component. For this type, several interesting features are further elucidated: (1) the simultaneous onset of the coastal sea breeze and the valley or upslope wind in the mountainous region is clearly seen, especially in the eastern Chugoku area, (2) the meeting of the southerly sea breeze from the Seto Inland Sea and the northerly breeze from the Sea of Japan occurs around the region of the mountain ridges in eastern Chugoku, (3) the alternation of converging sea breezes from surrounding seas forms a uniform southerly sea breeze from the Kui Channel at Awaji Island, (4) the southerly sea breeze continues until the late afternoon in the coastal area of the Kui Channel and Osaka Bay.Other types are discussed and compared with the above type for the mature stage of the sea breeze. The relationships between the occurrence of the land and sea breeze and general meteorological conditions are also analyzed.

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An Observational Study on Land and Sea Breezes in the Tokai Village Area

Cited by 8 publications

References 20 publications

Numerical Experiments on the Interaction of Ocean and Bay Breezes

Numerical Experiments on the Interaction of Ocean and Bay Breezes

Effects of Mountains and Urban Areas on Daytime Local-Circulations in the Osaka and Kyoto Regions

General Aspects of Land and Sea Breezes in Osaka Bay and Surrounding Area

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