Glacier melt. Patagonia, Chile. Left: September 18, 1986. Right: August 5, 2002. The 1986 image shows the region prior to a major retreat of the glaciers. The 2002 image shows a retreat of nearly 10 kilometers (6.2 miles) of the glacier on the left side. The smaller glacier on the right has receded more than 2 kilometers (1.2 miles). In front of the smaller glacier, two ribbon lakes have formed behind the debris left by the glacier’s advance. Scientists and government managers are using satellite imagery like this to monitor the retreat of the glaciers and the impact on water bodies caused by the changes in the glaciers’ size and direction. Captions and Photo source: NASA
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As ice sheets melted during the deglaciation of the last ice age and global oceans warmed, oceanic oxygen levels decreased and “denitrification” accelerated by 30 to 120 percent, a new international study shows, creating oxygen-poor marine regions and throwing the oceanic nitrogen cycle off balance…
