Sea breeze

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

Acorn production by Kashiwa oak in a coastal forest under fluctuating weather conditions

Abstract: We modeled the annual acorn crops of Kashiwa oak (Quercus dentata Thunb.) in a coastal forest in Hokkaido, northern Japan. Shoots of Kashiwa oak withered away during winter because of sea breeze and cold, and succeeding production of female inflorescences were strongly affected by mortality of buds. Thus, strong sea breeze and cold winters reduced the survival ratio of buds and further resulted in reduction of female flowering. Number of female flowers was related with current acorn crops, however, survival of female flowers after pollination was strongly influenced by warmth in the flowering period. Regression analysis of the annual acorn crop versus weather conditions suggests that acorn crop was decreased by cool conditions in the flowering period. A model equation was constructed to estimate the annual acorn crops by three weather variables: cumulative velocity of sea breeze and mean monthly temperature in winter (December–March) and maximum monthly temperature in current flowering period (June). This...

Rotation of sea/land breezes along the northeastern Adriatic coast

Abstract: The diurnal evolution of the sea/land breeze hodographs over the northeastern Adriatic coast has been examined for several episodes, each lasting a few days A limited set of observations, as well as the results of a three-dimensional nonhydrostatic mesoscale model are studied by applying a rotary-component method This revealed a spatial distribution of the clockwise versus anti-clockwise rotation of the wind vectors for the sea/land breeze events An application of the rotary-component method to the results of additional numerical sensitivity tests showed that the coastal topography height considerably influences both the shape of the wind hodographs and the sense of wind rotation The method also displayed which areas are under a strong influence of the 24-h topographic forcing and which areas show a large wind consistency A further analysis of the 24-h modeled wind hodographs at several selected stations has been performed, thus revealing the hodograph shapes and the reasons for them

Areal Parameters of the Sea Breeze and Its Vertical Structure in the Boston Basin

Abstract: The sea breeze is a mesoscale wind whose frequency of occurrence is 40–50 times annually in the Boston Basin. Boston's sea breeze is among the best developed of all midlatitude sites studied. The complexity of site conditions and an urban concentration alter the characteristics of the sea breeze with inland penetration. Vertical temperature and dew point data have provided the first detailed look at the changes effected in Boston's atmosphere by this local wind. The data have also revealed that Boston's sea breeze is not always a moist flow of marine air but that the moisture content of the air is directly related to the regional wind speed and direction prior to onset of the sea breeze. Transformations of the vertical characteristics of the atmosphere suggest subtle but serious geographic and environmental variations in the spatial distribution of atmospheric contaminants.

Equivalent wind speed model in wind farm dynamic analysis

Abstract: Researching on interaction between wind farm and power system, it usually uses simple model to describe the wind farm. The wind turbines in a wind farm always suppose as a coherent generator group, every wind turbines have identical wind speed. As wind turbine locates in the different site in the wind farm, the wind speed at each wind turbines will not change simultaneously. Wake effect is another factor that should take into consideration. So, it needs to get wind speed equivalent model. The equivalent model of wind speed in the wind farm is based on output of power. Gust wind and ramp wind are discussed. Wind farm will change gust wind into step varying wind and make ramp wind into different type wind. The arrangement of wind turbines will also affect equivalent model of wind speed. The result show that the length of wind farm will smooth the power output. It explains why the power output fluctuation of wind farm is smaller than single wind turbine. The onshore wind farm located in Dongtai Jiangsu province is proposed as an example. The equivalent wind speed model and equivalent impedance connected to grid are calculated. The results illustrate the impact of wind speed model on wind farm output.