A numerical study of the convection triggering and propagation associated with sea breeze circulation over Hainan Island

2017 ◽  
Vol 122 (16) ◽  
pp. 8567-8592 ◽  
Author(s):  
Zhaoming Liang ◽  
Donghai Wang ◽  
Ying Liu ◽  
Qinbo Cai
Keyword(s):  
Numerical Study ◽  
Sea Breeze ◽  
Hainan Island ◽  
Breeze Circulation

scholarly journals A numerical study of the effect of sea breeze circulation on photochemical pollution over a highly industrialized peninsula

2009 ◽  
Vol 17 (1) ◽  
pp. 19-31 ◽  
Author(s):  
Cristina Mangia ◽  
Ilenia Schipa ◽  
Annalisa Tanzarella ◽  
Dario Conte ◽  
Gian Paolo Marra ◽  
...  
Keyword(s):  
Numerical Study ◽  
Sea Breeze ◽  
Breeze Circulation ◽  
Photochemical Pollution

scholarly journals Numerical Study of the Effects of Topography and Urbanization on the Local Atmospheric Circulations over the Beijing-Tianjin-Hebei, China

2015 ◽  
Vol 2015 ◽  
pp. 1-16 ◽  
Author(s):  
Yucong Miao ◽  
Shuhua Liu ◽  
Yijia Zheng ◽  
Shu Wang ◽  
Bicheng Chen
Keyword(s):  
Numerical Study ◽  
Wrf Model ◽  
Sea Breeze ◽  
Land Breeze ◽  
Bohai Bay ◽  
Breeze Circulation ◽  
Thermally Induced ◽  
Atmospheric Circulations ◽  
Mountain Valley ◽  
Bth Region

The effects of the topography and urbanization on the local atmospheric circulations over the Beijing-Tianjin-Hebei (BTH) region were studied by the weather research and forecasting (WRF) model, as well as the interactions among these local atmospheric circulations. It was found that, in the summer day time, the multiscale thermally induced local atmospheric circulations may exist and interact in the same time over the BTH region; the topography played a role in the strengthening of the sea breeze circulations; after sunset, the inland progress of sea breeze was slowed down by the opposite mountain breeze; when the land breeze circulation dominated the Bohai bay, the mountain breeze circulation can couple with the land breeze circulation to form a large circulation ranging from the coastline to the mountains. And the presence of cities cannot change the general state of the sea-land breeze (SLB) circulation and mountain-valley breeze (MVB) circulation but acted to modify these local circulations slightly. Meanwhile, the development of the urban heat island (UHI) circulation was also strongly influenced by the nearby SLB circulation and MVB circulation.

scholarly journals Numerical Study on the Effects of Mountains on the Land and Sea Breeze Circulation in the Kanto District

1981 ◽  
Vol 59 (5) ◽  
pp. 723-738 ◽  
Author(s):  
Y. Kikuchi ◽  
S. Arakawa ◽  
F. Kimur ◽  
K. Shirasaki ◽  
Y. Nagano
Keyword(s):  
Numerical Study ◽  
Sea Breeze ◽  
Breeze Circulation ◽  
Kanto District

scholarly journals The effect of coastal upwelling on the sea-breeze circulation at Cabo Frio, Brazil: a numerical experiment

1998 ◽  
Vol 16 (7) ◽  
pp. 866-871 ◽  
Author(s):  
S. H. Franchito ◽  
V. B. Rao ◽  
J. L. Stech ◽  
J. A. Lorenzzetti
Keyword(s):  
Coastal Upwelling ◽  
Surface Wind ◽  
Three Dimensional ◽  
Sea Breeze ◽  
Atmospheric Model ◽  
Ocean Model ◽  
Breeze Circulation ◽  
Mesoscale Meteorology ◽  
Forcing Function ◽  
Cabo Frio

Abstract. The effect of coastal upwelling on sea-breeze circulation in Cabo Frio (Brazil) and the feedback of sea-breeze on the upwelling signal in this region are investigated. In order to study the effect of coastal upwelling on sea-breeze a non-linear, three-dimensional, primitive equation atmospheric model is employed. The model considers only dry air and employs boundary layer formulation. The surface temperature is determined by a forcing function applied to the Earth's surface. In order to investigate the seasonal variations of the circulation, numerical experiments considering three-month means are conducted: January-February-March (JFM), April-May-June (AMJ), July-August-September (JAS) and October-November-December (OND). The model results show that the sea-breeze is most intense near the coast at all the seasons. The sea-breeze is stronger in OND and JFM, when the upwelling occurs, and weaker in AMJ and JAS, when there is no upwelling. Numerical simulations also show that when the upwelling occurs the sea-breeze develops and attains maximum intensity earlier than when it does not occur. Observations show a similar behavior. In order to verify the effect of the sea-breeze surface wind on the upwelling, a two-layer finite element ocean model is also implemented. The results of simulations using this model, forced by the wind generated in the sea-breeze model, show that the sea-breeze effectively enhances the upwelling signal.Key words. Meteorology and atmospheric dynamics (mesoscale meteorology; ocean-atmosphere interactions) · Oceanography (numerical modeling)

A complete sea-breeze circulation cell derived from aircraft observations

1995 ◽  
Vol 73 (3) ◽  
pp. 299-317 ◽  
Author(s):  
Klara Finkele ◽  
J�rg M. Hacker ◽  
Helmut Kraus ◽  
Roland A. D. Byron-Scott
Keyword(s):  
Sea Breeze ◽  
Breeze Circulation ◽  
Aircraft Observations ◽  
Circulation Cell

scholarly journals A Numerical Study of “Hijikawa-Arashi”: A Thermally Driven Gap Wind Visualized by Nocturnal Fog

2019 ◽  
Vol 58 (6) ◽  
pp. 1293-1307
Author(s):  
Junshi Ito ◽  
Toshiyuki Nagoshi ◽  
Hiroshi Niino
Keyword(s):  
Land Surface ◽  
Numerical Study ◽  
Sea Breeze ◽  
Early Morning ◽  
Horizontal Resolution ◽  
Local Wind ◽  
The Seto Inland Sea ◽  
Thermally Driven ◽  
Fine Resolution ◽  
Autumn And Winter

AbstractA renowned local wind in Japan, “Hijikawa-Arashi,” is a thermally driven nocturnal gap wind accompanied by fog. The wind is visually identified by the fog along the valley of the Hijikawa River between the Ozu basin and the Seto Inland Sea during the early morning in autumn and winter. A fine-resolution numerical model is employed to reproduce the main observed features of Hijikawa-Arashi. A vertical resolution of 10 m or less at the lowest level is required to express the nocturnal radiative cooling of the land that is required for fog formation in the basin, and fine horizontal resolution is necessary to express a realistic valley through which the fog is advected to the sea. Multiple hydraulic jumps accompanied by supercritical flow occur because of the complex topography. Both moisture transport by the sea breeze during the daytime and evaporation from the land surface are important for accumulating moisture to produce the fog.

Impact of Vertical Wind Shear on Gravity Wave Propagation in the Land–Sea-Breeze Circulation at the Equator

2019 ◽  
Vol 76 (10) ◽  
pp. 3247-3265
Author(s):  
Yu Du ◽  
Richard Rotunno ◽  
Fuqing Zhang
Keyword(s):  
Gravity Wave ◽  
Gravity Waves ◽  
Wind Shear ◽  
Vertical Wind Shear ◽  
Sea Breeze ◽  
Vertical Wind ◽  
Background Wind ◽  
Breeze Circulation ◽  
Attenuation Level ◽  
Ray Path

Abstract The impact of vertical wind shear on the land–sea-breeze circulation at the equator is explored using idealized 2D numerical simulations and a simple 2D linear analytical model. Both the idealized and linear analytical models indicate Doppler shifting and attenuation effects coexist under the effect of vertical wind shear for the propagation of gravity waves that characterize the land–sea-breeze circulation. Without a background wind, the idealized sea breeze has two ray paths of gravity waves that extend outward and upward from the coast. A uniform background wind causes a tilting of the two ray paths due to Doppler shifting. With vertical shear in the background wind, the downstream ray path of wave propagation can be rapidly attenuated near a certain level, whereas the upstream ray path is not attenuated and the amplitudes even increase with height. The downstream attenuation level is found to descend with increasing linear wind shear. The present analytical model establishes that the attenuation level corresponds to the critical level where the background wind is equal to the horizontal gravity wave phase speed. The upstream gravity wave ray path can propagate upward without attenuation as there is no critical level there.

scholarly journals Intraseasonal Variability of the Diurnal Cycle of Precipitation in the Philippines

2019 ◽  
Vol 76 (11) ◽  
pp. 3633-3654 ◽  
Author(s):  
Michael B. Natoli ◽  
Eric D. Maloney
Keyword(s):  
Diurnal Cycle ◽  
Coastal Waters ◽  
Intraseasonal Oscillation ◽  
Sea Breeze ◽  
Active Phase ◽  
The Philippines ◽  
Boreal Summer ◽  
Breeze Circulation ◽  
Convective Envelope ◽  
Cycle Amplitude

Abstract Precipitation in the region surrounding the South China Sea over land and coastal waters exhibits a strong diurnal cycle associated with a land–sea temperature contrast that drives a sea-breeze circulation. The boreal summer intraseasonal oscillation (BSISO) is an important modulator of diurnal precipitation patterns, an understanding of which is a primary goal of the field campaign Propagation of Intraseasonal Tropical Oscillations (PISTON). Using 21 years of CMORPH precipitation for Luzon Island in the northern Philippines, it is shown that the diurnal cycle amplitude is generally maximized over land roughly 1 week before the arrival of the broader oceanic convective envelope associated with the BSISO. A strong diurnal cycle in coastal waters is observed in the transition from the inactive to active phase, associated with offshore propagation of the diurnal cycle. The diurnal cycle amplitude is in phase with daily mean precipitation over Mindanao but is nearly out of phase over Luzon. The BSISO influence on the diurnal cycle on the eastern side of topography is nearly opposite to that on the western side. Using wind, moisture, and radiation products from the ERA5 reanalysis, it is proposed that the enhanced diurnal cycle west of the mountains during BSISO suppressed phases is related to increased insolation and weaker prevailing onshore winds that promote a stronger sea-breeze circulation when compared with the May–October mean state. Offshore propagation is suppressed until ambient midlevel moisture increases over the surrounding oceans during the transition to the active BSISO phase. In BSISO enhanced phases, strong low-level winds and increased cloudiness suppress the sea-breeze circulation.

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