'Shimmering', the Visual Distortion of Objects Underwater at Thermal Boundaries.
Abstract
On many occasions and in different areas a phenomenon here described as 'shimmering' has been observed during diving operations in water masses that have sharp thermal boundaries. Observations of this phenomenon have been made in the waters off southern California and Florida by the writer. Limbaugh, (personal communication) has observed a similar effect in the Bahamas that was so strong that underwater photographic work had to be delayed. 'Shimmering' as defined in this memorandum is the distortion of light rays as they pass through or reflect from a turbulent thermal boundary. Visual distortion is often seen on land when hot air rises from a hot pavement surface. 'Shimmering' has a similar visual effect in that there is also a distortion of the shape of objects viewed in the vicinity of the thermocline.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 18, 1956
- Accession Number
- ADA051530
Entities
People
- Robert F. Dill
Organizations
- Navy Electronics Laboratory