File:Thermals over Bishop Hill providing lift to gliders - geograph.org.uk - 490526.jpg
Thermals_over_Bishop_Hill_providing_lift_to_gliders_-_geograph.org.uk_-_490526.jpg (640 × 480 pixels, file size: 30 KB, MIME type: image/jpeg)
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[edit]DescriptionThermals over Bishop Hill providing lift to gliders - geograph.org.uk - 490526.jpg |
English: Thermals over Bishop Hill providing lift to gliders Warm air rising in front of and above the hill allow glider pilots to stay up for hours.
These thermals are the escalator or lift to the heavens. More about these atmospheric phenomena here: http://en.wikipedia.org/wiki/Thermal My thanks to James Allan for his input here: Gliders usually operate here in orographic up-currents or mountain waves, caused by westerly winds being forced upwards by the Bishop Hill escarpment. Thermals (as described in the link) can occur here too under certain conditions, but were probably absent under the cloud cover depicted. There are ten gliders in this picture above this gridsquare, sometimes there can be more. From the ground it looks like a wartime dog-fight Dog_fight |
Date | |
Source | From geograph.org.uk |
Author | Simon Johnston |
Attribution (required by the license) InfoField | Simon Johnston / Thermals over Bishop Hill providing lift to gliders / |
InfoField | Simon Johnston / Thermals over Bishop Hill providing lift to gliders |
Camera location | 56° 12′ 53″ N, 3° 19′ 23″ W ![]() ![]() | View this and other nearby images on: OpenStreetMap | ![]() |
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Object location | 56° 12′ 53″ N, 3° 19′ 23″ W ![]() ![]() | View this and other nearby images on: OpenStreetMap | ![]() |
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Licensing
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This image was taken from the Geograph project collection. See this photograph's page on the Geograph website for the photographer's contact details. The copyright on this image is owned by Simon Johnston and is licensed for reuse under the Creative Commons Attribution-ShareAlike 2.0 license.
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 06:25, 5 February 2011 | ![]() | 640 × 480 (30 KB) | GeographBot (talk | contribs) | == {{int:filedesc}} == {{Information |description={{en|1=Thermals over Bishop Hill providing lift to gliders Warm air rising in front of and above the hill allow glider pilots to stay up for hours. These thermals are the escalator or lift to the heavens. |
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Metadata
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Camera manufacturer | FUJIFILM |
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Camera model | FinePix F20 |
Exposure time | 1/800 sec (0.00125) |
F-number | f/6.4 |
ISO speed rating | 200 |
Date and time of data generation | 14:14, 6 April 2007 |
Lens focal length | 8 mm |
Orientation | Normal |
Horizontal resolution | 72 dpi |
Vertical resolution | 72 dpi |
Software used | Digital Camera FinePix F20 Ver1.00 |
File change date and time | 14:14, 6 April 2007 |
Y and C positioning | Co-sited |
Exposure Program | Normal program |
Exif version | 2.2 |
Date and time of digitizing | 14:14, 6 April 2007 |
Image compression mode | 4 |
APEX shutter speed | 9.64 |
APEX aperture | 5.4 |
APEX brightness | 10.06 |
APEX exposure bias | 0 |
Maximum land aperture | 3 APEX (f/2.83) |
Metering mode | Pattern |
Light source | Unknown |
Flash | Flash did not fire, compulsory flash suppression |
Color space | sRGB |
Focal plane X resolution | 3,703 |
Focal plane Y resolution | 3,703 |
Focal plane resolution unit | 3 |
Sensing method | One-chip color area sensor |
Custom image processing | Normal process |
Exposure mode | Auto exposure |
White balance | Auto white balance |
Scene capture type | Standard |
Sharpness | 3 |
Subject distance range | Unknown |