On Surface-Based Advective Radar Ducts.
Abstract
As a warm, well mixed air mass flows off a land surface and over a cooler sea, the air is modified in a layer near the surface. Within this layer humidity decreases while temperature increases with height and a radar duct is formed. The non-dimensional parameters governing the growth of the modified layer are derived and simple forms are found for the increase of layer height with fetch and for the shapes of humidity and temperature profiles. From these relations the depth and strength of the radar duct are derived as functions of the modified layer depth and the differences in potential temperature and water vapour pressure between the overland air mass and air in thermodynamic equilibrium with the sea surface. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1978
- Accession Number
- ADA071454
Entities
People
- Phillip J. Mulhearn