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Sea breeze

About: Sea breeze is a research topic. Over the lifetime, 2544 publications have been published within this topic receiving 55651 citations.


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TL;DR: In this paper, three-dimensional nested tracer simulations of a pollution plume originating from the Indian sub-continent over the Indian Ocean were performed with the Regional Atmospheric Modeling System (RAMS), to provide insight into the transport patterns of the pollutants, as well as to investigate the dynamical mechanisms controlling the vertical structure of the plume and its evolution in the vicinity of the Maldives Islands.
Abstract: Three-dimensional, nested tracer simulations of a pollution plume originating from the Indian sub-continent over the Indian Ocean, in the framework of the Indian Ocean Experiment (INDOEX), between 5 and 9 March 1999, were performed with the Regional Atmospheric Modeling System (RAMS), to provide insight into the transport patterns of the pollutants, as well as to investigate the dynamical mechanisms controlling the vertical structure of the plume and its evolution in the vicinity of the Maldives Islands. Airborne and ground-based LIDAR observations of the structure of the haze plume made on 7 March 1999 were used to assess the quality of the simulations, as well as the impact of grid resolution on the vertical structure of the simulated plume. It is shown that, over the Arabian Sea, in the vicinity of the Maldives Islands, the pollutants composing the plume observed by the airborne LIDAR essentially originated from the city of Madras and that the vertical structure of the plume was controlled by the diurnal cycle of the continental boundary layer depth. A combination of tracer simulations and remote sensing observations (airborne LIDAR, ship-borne photometer, ground-based LIDAR in Goa) was used to analyse the diurnal evolution of the haze plume over the sea. We find evidence that the sea breeze circulation and orographic lifting taking place in the southern part of the Indian sub-continent during the daytime play a crucial role in the modulation of the continental boundary layer depth, and in turn, the haze plume depth. The eastward shift of the subtropical high from central India to the Bay of Bengal after 6 March lead to an increase in the tracer concentrations simulated over the Arabian Sea, in the region of intensive observations north of the Maldives, as transport pathways form Hyderabad and Madras were modified significantly. The nesting of a high horizontal resolution domain (5 km, with 39 vertical levels below 4000 m above mean seal level) allows for a better representation of local dynamics, the circulation of sea and mountains breezes, and therefore a noticeable improvement in the representation of the pollutants' plume in the simulation.

19 citations

Journal ArticleDOI
15 Dec 2010
TL;DR: In this paper, the response of diurnal-period ocean current variability to the sea breeze using measurements of current velocity taken off the mouth of the Itata River and wind stress collected at Hualpen Point (central Chile) in spring of 2007 and summer of 2006 and 2008 was characterized.
Abstract: We characterize the response of diurnal-period ocean current variability to the sea breeze using measurements of current velocity taken off the mouth of the Itata River and wind stress collected at Hualpen Point (central Chile) in spring of 2007 and summer of 2006 and 2008. During these three periods, the winds are predominately towards the northeast, following the coastal topography, with the highest variability found in the near-diurnal and synoptic frequency bands. The sea breeze amplitude is intermittent in time and is associated with synoptic-scale variability on the order of three to 15 days, so that the diurnal-period winds (and currents) are enhanced when the alongshore wind (i.e. upwelling-favorable) is strong. The water current variability in the near-diurnal band is significant, explaining up to 40% (spring 2007) of the total current variance in the first 15 m depth. The response of the near-diurnal band to the sea breeze is surface-intensified and elliptically polarized with anticlockwise rotation. As is the case with the wind, the ellipses of the daily-period surface current velocity are oriented alongshore, although the currents are significantly less rectilinear. In the along-shore direction, the diurnal-period wind-stress is directed towards the northeast and the shore after mid-day and reverse their direction at night. The currents also show counterclockwise rotation during the day, with nearly in-phase along-shore motion in the surface layer and shoreward (oceanward) motion during the morning (late afternoon). The deep layer also show significant counterclockwise motion but its magnitude is roughly one third smaller than in the surface layer, and as much as 180° out of phase. A two-layer analytical model with no friction but that includes a cross-shelf pressure gradient and wind-stress forcing is used to diagnose key properties of the observed response, suggesting that the observed diurnal-period currents may be wind driven. However, data from different years shows that inertial motions and probably other dynamics can be important when the winds are relatively weak or highly variable.

19 citations

Journal ArticleDOI
TL;DR: In this paper, the authors characterize diurnal and semidiurnal temporal variability of the spring and summer near-shore hydrographic structure and circulation in Cartagena Bay, a small open bay in central Chile, and assess the relative role of diurnal wind and semi-diminative tide as forcing mechanisms of that variability.

19 citations

Journal ArticleDOI
TL;DR: In this article , a multi-criterion decision-making approach for optimal off-shore wind location assessment by including fuzzy geographical information systems to prioritize the different locations and alternatives is presented.

19 citations

Journal ArticleDOI
TL;DR: In this article, the effect of seasonal variations on odor dispersion from industrial to community areas, which were considerably higher from the late spring through fall according to complaint statistics, was investigated.
Abstract: Changwon is an industrial city located in the southeastern region of South Korea. Surrounded by coastal and mountainous areas with contiguous industrial and residential areas, the city of Changwon has experienced a high number of malodor complaints in recent years. This study was carried out to investigate the effect of seasonal variations on odor dispersion from industrial to community areas, which were considerably higher from the late spring through fall according to complaint statistics. Investigation methods comprise the applications of electronic odor detector, questionnaire, olfactory system, weather observation data, and weather research and forecasting/CALPUFF modeling system. Results from all methods were consistent in showing that the change of seasons affected the direction of odor diffusion. From summer to early fall, the pollutions emitted from the industrial zone had the highest impact on the residential zone, covering the three most common areas of complaints for unpleasant odors. The reasons are that during the summer period, the reduction of a planetary boundary layer and the prevalence of a consistent sea breeze resulted in the presence of south–southwesterly ocean winds which swept through the factories to a residential area. In contrast, synoptic winds which prevailed during other seasons restrained sea breeze circulation, leading to diverse wind directions. During the fall season, the higher number of complaints could be attributed to a lower wind speed, which caused the poor spread of pollutants from the area with the topography of the basin.

19 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202382
2022190
2021101
202087
201978
201877