Examination of shipboard measurements of the vertical profiles of mean temperature, humidity and wind speed

摘要

The suitability of shipboard profile measurements of meantemperature, mean humidity and mean wind over the open ocean isexamined on the basis of six hours and 20 minutes of simultaneousprofile measurements made from the R/V Acania on 20-21 September1973 near San Nicolas Island, California. Comparisons of theprofiles obtained from the shipboard measurements, as well as themeteorological parameters derived from those profiles are madewith results obtained from more stable platforms. Parametersexamined include the Richardson number, the friction velocity,the drag coefficient and the roughness length.The drag coefficient and roughness length were found to begenerally larger than those obtained from more stable platforms,but the Richardson number and the relationships between thevarious parameters, as well as the profiles of wind speed andtemperature themselves, compare favorably. The results indicatethat a ship can be a suitable platform for measuring profiles.