Convergence
by Ralf Rohner
Title
Convergence
Artist
Ralf Rohner
Medium
Photograph
Description
The Intertropical Convergence Zone, or ITCZ, is the region that circles the Earth, near the equator, where the trade winds of the Northern and Southern Hemispheres come together. The precise position of the ITCZ varies with the seasons. The most active region always lags by about 1 to 2 months behind the sun’s relative position above the Earth’s surface. The intense sun and warm water of the equator heats the air in the ITCZ, raising its humidity and making it buoyant. Aided by the convergence of the trade winds, the buoyant air rises, expands and cools, releasing the accumulated moisture in an almost perpetual series of thunderstorms.
I captured this image of the rising Milky Way converging with the ITCZ during a South Atlantic crossing, from the flight deck of a Boeing 777-300ER. The ITCZ was moderately active with clearly defined cumulonimbus clouds, displaying some lightning activity. Nevertheless, the ride at our cruise level of 33’000 feet was reasonably smooth, allowing me to capture the Milky Way and two shooting stars above the atmospheric turmoil.
EXIF
Canon EOS 6D, astro-modified
Samyang 24mm f/1.4 @ f/2
Sky:
4 panel panorama each a stack of 24 x 5s @ ISO 12800
Foreground:
Panorama of 4 single exposures from the sky series
Uploaded
April 29th, 2021
Statistics
Viewed 374 Times - Last Visitor from New York, NY on 04/19/2024 at 2:46 AM
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