We birded the Walvis Bay Salt Works during the afternoon of August 10, 2012. We photographed these salt piles as we drove through the area. Walvis Bay is one of the largest salt works in Africa. Seawater is fed into large ponds, and water is removed by evaporation. The color of the ponds indicates the salinity level. Microorganisms change their hues as the salinity of the pond increases. In low to mid-salinity ponds, green algae predominate. In middle to high salinity ponds, Dunaliella salina, a microalgae, shifts the color to red. Temperatures were in the mid-60's on this overcast afternoon.
SaltWorks.jpg | |
Exif | |
Make | NIKON CORPORATION |
Model | NIKON D7000 |
Orientation | top, left side |
X Resolution | 1/300 inches |
Y Resolution | 1/300 inches |
Resolution Unit | Inches |
Software | ViewNX 2.5 W |
Date/Time | 2012:10:24 13:21:25 |
Artist | |
YCbCr Positioning | Center of pixel array |
Copyright | |
Exposure Time | 1/5000 sec |
F-Number | F7.1 |
Exposure Program | Program normal |
ISO Speed Ratings | 1000 |
Exif Version | 2.30 |
Date/Time Original | 2012:08:10 13:50:14 |
Date/Time Digitized | 2012:08:10 13:50:14 |
Components Configuration | YCbCr |
Exposure Bias Value | 2/3 |
Max Aperture Value | F6.3 |
Metering Mode | Spot |
Light Source | Unknown |
Flash | Unknown (16) |
Focal Length | 500.0 mm |
User Comment | ASCII |
Sub-Sec Time | 50 |
Sub-Sec Time Original | 50 |
Sub-Sec Time Digitized | 50 |
FlashPix Version | 1.00 |
Color Space | Undefined |
Exif Image Width | 4928 pixels |
Exif Image Height | 3264 pixels |
Sensing Method | One-chip color area sensor |
File Source | Digital Still Camera (DSC) |
Scene Type | Directly photographed image |
CFA Pattern | |
Compression | JPEG compression |
Thumbnail Offset | 12456 bytes |
Thumbnail Length | 1940 bytes |
Thumbnail Data | [1940 bytes of thumbnail data] |
GPS | |
GPS Version ID | 2 2 2 2 |
generated by EXIF-O-Matic on 2012.10.25 |