| ISS036 Earth Sciences and Image Analysis Photographic Highlights |
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| ISS036-E-35635 |
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| Whiting Event, Lake Ontario: This photograph from the
International Space Station highlights a late-summer “whiting event”
visible across much of Lake Ontario (one of North America’s Great
Lakes). Such events commonly occur in late summer and are caused by
changes in water temperature, which allows fine particles of calcium
carbonate to form in the water column. Increased photosynthesis by
phytoplankton and other microscopic marine life can also reduce the
amount of carbon dioxide in the water column, changing the acidity
and allowing calcium carbonate to form. These particles of calcium
carbonate cause the characteristic lightening (“whiting”) of the
water color observed. Lake Ontario—like the Great Lakes Erie, Huron, and Superior—is roughly divided between the United States and Canada. The USA side of Lake Ontario has its shoreline in the state of New York, while its Canadian shoreline lies within the province of Ontario. The city of Kingston, Ontario, is visible near the Saint Lawrence River outflow from the lake. Several other landscape features of New York State are visible in the image, including the Finger Lakes region to the west of Syracuse. To the northeast of Syracuse, the dark wooded slopes of the Adirondack Mountains are visible at image upper left. Patchy white cloud cover obscures much of the land surface to the west of Lake Ontario. The Moderate Resolution Imaging Spectroradiometer (MODIS) on NASA’s Aqua satellite captured an image of the whiting event on the same day, August 24, 2013. Editor’s Note: A previous version of this story identified the discoloration of the water as a bloom of phytoplankton or harmful algae. Such events can produce stunning color changes, as shown here. However, scientists working on the water in the area provided information to verify that it was instead a whiting event. |
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This service is provided by the International Space Station program and the JSC Astromaterials Research & Exploration Science Directorate. Recommended Citation: Image Science and Analysis Laboratory, NASA-Johnson Space Center. "The Gateway to Astronaut Photography of Earth." . |
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