Abstract
The diurnal wind variation over the East Asian continent is commonly considered to be a combination of a land-sea breeze near the coast and a mountain-valley breeze along the slopes of the Tibetan Plateau. The local land-sea breeze along the coastline typically spans <100 km into the ocean. However, a detailed examination of the global reanalysis data suggests that this local land-sea breeze circulation apparently couples with the global-scale diurnal atmospheric pressure tide to produce a planetary-scale land-sea breeze with a spatial scale of ~1000 km over the western North Pacific. Computations of the momentum budget and equivalent potential temperatures indicate that the atmospheric diurnal tidal wave contributes the most to this circulation feature. A diagnosis of the water vapour budget further suggests that the convergence of water vapour flux, which is related to the convergence of low-level wind induced by the seasonal change of diurnal tidal wave, leads to different times of occurrence of maximum diurnal rainfall over East Asia between summer and winter.
| Original language | English |
|---|---|
| Pages (from-to) | 1543-1553 |
| Number of pages | 11 |
| Journal | Quarterly Journal of the Royal Meteorological Society |
| Volume | 136 |
| Issue number | 651 |
| DOIs | |
| Publication status | Published - 2010 Jul 1 |
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Keywords
- Diurnal rainfall variation
- Diurnal wind variation
- Pressure tidal wave
ASJC Scopus subject areas
- Atmospheric Science
Cite this
A planetary-scale land-sea breeze circulation in East Asia and the western North Pacific. / Huang, Wan Ru; Chan, Johnny C.L.; Wang, Shih Yu.
In: Quarterly Journal of the Royal Meteorological Society, Vol. 136, No. 651, 01.07.2010, p. 1543-1553.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - A planetary-scale land-sea breeze circulation in East Asia and the western North Pacific
AU - Huang, Wan Ru
AU - Chan, Johnny C.L.
AU - Wang, Shih Yu
PY - 2010/7/1
Y1 - 2010/7/1
N2 - The diurnal wind variation over the East Asian continent is commonly considered to be a combination of a land-sea breeze near the coast and a mountain-valley breeze along the slopes of the Tibetan Plateau. The local land-sea breeze along the coastline typically spans <100 km into the ocean. However, a detailed examination of the global reanalysis data suggests that this local land-sea breeze circulation apparently couples with the global-scale diurnal atmospheric pressure tide to produce a planetary-scale land-sea breeze with a spatial scale of ~1000 km over the western North Pacific. Computations of the momentum budget and equivalent potential temperatures indicate that the atmospheric diurnal tidal wave contributes the most to this circulation feature. A diagnosis of the water vapour budget further suggests that the convergence of water vapour flux, which is related to the convergence of low-level wind induced by the seasonal change of diurnal tidal wave, leads to different times of occurrence of maximum diurnal rainfall over East Asia between summer and winter.
AB - The diurnal wind variation over the East Asian continent is commonly considered to be a combination of a land-sea breeze near the coast and a mountain-valley breeze along the slopes of the Tibetan Plateau. The local land-sea breeze along the coastline typically spans <100 km into the ocean. However, a detailed examination of the global reanalysis data suggests that this local land-sea breeze circulation apparently couples with the global-scale diurnal atmospheric pressure tide to produce a planetary-scale land-sea breeze with a spatial scale of ~1000 km over the western North Pacific. Computations of the momentum budget and equivalent potential temperatures indicate that the atmospheric diurnal tidal wave contributes the most to this circulation feature. A diagnosis of the water vapour budget further suggests that the convergence of water vapour flux, which is related to the convergence of low-level wind induced by the seasonal change of diurnal tidal wave, leads to different times of occurrence of maximum diurnal rainfall over East Asia between summer and winter.
KW - Diurnal rainfall variation
KW - Diurnal wind variation
KW - Pressure tidal wave
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U2 - 10.1002/qj.663
DO - 10.1002/qj.663
M3 - Article
AN - SCOPUS:77957168497
VL - 136
SP - 1543
EP - 1553
JO - Quarterly Journal of the Royal Meteorological Society
JF - Quarterly Journal of the Royal Meteorological Society
SN - 0035-9009
IS - 651
ER -