The sea breeze/land breeze circulation system in the Los Angeles area results in transport of pollutants seaward at night followed by return of aged material inland the next day. This characteristic wind reversal pattern both increases the retention time available for the oxidation of S02 to for m sulfates and causes individual air parcels to make multiple passes over large coastal emissions so...

The sea breeze/land breeze circulation system in the Los Angeles a r ea results in transport of pollutants seaward at nigh t followed by return of aged material inland the next day . This characteristic wind reversal pattern both increases the r etention time available for the oxidation of S02 to form sulfates and causes individual a ir parcels to make mul tiple passes over large coas tal emiss...

Abstract One of the most prominent mesoscale phenomena in coastal zone is sea-breeze/land-breeze circulation. The pattern and its implications for weather areas are well described, with mesoscale-resolving operational NWP models circulation can be captured. In this study, a straightforward method to identify sea land breezes based on change wind direction column above grid point coastline prese...

Urbanisation leads to increased thermal stress in hot-humid climates due to increased surface and air temperatures and reduced wind speed. We examined the influence of urban morphology and sea breeze on the microclimate of Colombo, Sri Lanka. Air and surface temperatures, humidity and wind speed were measured at 1 rural and 5 urban sites during the warmest season. The urban sites differed in th...

In this study we have analysed wind and wave time series data resulting from hourly measurements on the sea surface in Bushehr, the northern part of the Persian Gulf, from 15 July to 4 August 2000. Wind speed (U10) ranged from 0.34 to 10.38 m/s as alternating sea and land breezes. The lowest wind speed occurs at about midnight and the highest at around noon. The calculated autocorrelation of wi...

Strong vertical gradients at the top of the atmospheric boundary layer affect the propagation of electromagnetic waves and can produce radar ducts. A three-dimensional, time-dependent, nonhydrostatic numerical model was used to simulate the propagation environment in the atmosphere over the Persian Gulf when aircraft observations of ducting had been made. A division of the observations into hig...

Abstract. Sea-breeze fronts (SBFs) are frequently found to trigger deep convection. The convective updrafts near the SBF critical in this triggering process. Here, size and strength of an idealized investigated with large-eddy simulations. A central focus study is compare SBF, which substantially affected by ahead develop a typical boundary layer. It that larger than but have similar SBF. produ...

contrasts stronger, which enhances sea breeze circulations. Together, they increase near-surface moisture flux convergence and favour convective processes leading to an overall increase of precipitation over urban areas. The diurnal cycle of these effects is reflected in the atmospheric footprint of cities on variables such as humidity and cloud mixing ratio and accompanies changes in precipita...