Search Results
Abstract
Mean and fluctuating winds wore measured within the atmospheric surface layer at three locations across Long Island during the landfall of Hurricane Belle on 9 August 19176. An order of magnitude increase in wind shear was observed. A maximum friction velocity of ∼133 cm s−1 and a maximum energy dissipation rate of ∼130 cm−2 s−3 were estimated. Mean wind speeds at the beach were found to he 3–5 times the corresponding wind speeds inland. A periodicity in rainfall associated with bands of thundershowers was observed. A storm surge of ∼125 cm was estimated from water level records near Shinnecock Inlet. The records indicated the three successive stages, forerunner, hurricane surge and resurgence, associated with the hurricane.
Abstract
Mean and fluctuating winds wore measured within the atmospheric surface layer at three locations across Long Island during the landfall of Hurricane Belle on 9 August 19176. An order of magnitude increase in wind shear was observed. A maximum friction velocity of ∼133 cm s−1 and a maximum energy dissipation rate of ∼130 cm−2 s−3 were estimated. Mean wind speeds at the beach were found to he 3–5 times the corresponding wind speeds inland. A periodicity in rainfall associated with bands of thundershowers was observed. A storm surge of ∼125 cm was estimated from water level records near Shinnecock Inlet. The records indicated the three successive stages, forerunner, hurricane surge and resurgence, associated with the hurricane.
Abstract
A simple empirical model is developed based on physical and dimensional considerations to predict the height of air mass modification due to a change in surface characteristics. Most of the input parameters can be obtained from surface weather maps. The results of the empirical model are found to be in good agreement with observations made in the atmosphere over ocean with cooler downwind temperatures. The model is then used with appropriate parameters to predict flow modification over a heated surface in a wind tunnel for different upwind and downwind surface conditions.
Abstract
A simple empirical model is developed based on physical and dimensional considerations to predict the height of air mass modification due to a change in surface characteristics. Most of the input parameters can be obtained from surface weather maps. The results of the empirical model are found to be in good agreement with observations made in the atmosphere over ocean with cooler downwind temperatures. The model is then used with appropriate parameters to predict flow modification over a heated surface in a wind tunnel for different upwind and downwind surface conditions.
