Week 7: Rocket PreGame & Coach's Show

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Arctic Ocean Temperatures Keep Rising

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People's emissions are causing the planet to heat up and more than 93% of this heat goes into the oceans. People have measured ocean temperatures for a long time. Reliable records go back to at least 1880. Ever since records began, the oceans were colder than they are now. NOAA analysis shows that, on the Northern Hemisphere, the 20th century average for June is 16.4°C (61.5°F). In June 2015, it was a record 0.87°C (1.57°F) higher. Back in history, there have been times when it was warmer. The last time when it was warmer than today, during the Eemian Period, peak temperature was only a few tenths of a degree higher than today, according to the IPCC . In those days, there was huge melting, accompanied by extreme storms and sea levels that were 5 to 9 m higher than today. In many ways, the situation now already looks worse than it was in the Eemian. "The warm Atlantic surface current was weaker in the high latitude during the Eemian than today", says Henning Bauch . Carb...
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Arctic Sea Ice Collapse Threatens - Update 1

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The image below compares the Arctic sea ice thickness (in m) on July 15, for the years from 2012 (left panel) to 2015 (right panel), using Naval Research Laboratory images. Click on image to enlarge The image below compares the Arctic sea ice concentration (in %) on July 18, for the years from 2012 (left panel) to 2015 (right panel), using Naval Research Laboratory images. Above images show the dramatic decline of the sea ice in 2015, both in thickness and in concentration. In terms of thickness, sea ice has been reduced by more than one meter in many places, such as north of Greenland and the Canadian Archipelago, all in the time span of just one month. The dramatic fall in sea ice concentration also becomes apparent when comparing recent sea ice concentration (July 18, 2015, above right) with sea ice concentration back in May 2015 (image right, May 1, 2015). This dramatic decline of the sea ice in 2015 is the result of a combination of factors, including: High levels of greenhouse ga...
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Arctic Sea Ice Collapse Threatens - Update 2

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The image below shows sea surface temperature anomalies in the Arctic on July 30, 2015. Due to warm ocean waters and to heatwaves on land that extended over the Arctic Ocean, while warming up rivers ending into the Arctic Ocean, the sea ice has taken a battering over the past few weeks, as illustrated by the images below. Above image shows the last bit of thick (5 m) sea ice in the Canadian Archipelago, which became dislodged on July 8, 2015. It looks set to be virtually gone by August 7, 2015, according to the 30-day Naval Research Laboratory animation below, and as also discussed in greater detail in a recent post . The situation at the north-eastern tip of Greenland doesn't look much better, as illustrated by the image below. The comparison image below also shows the north-eastern tip of Greenland on July 5, 2015 (top), and on July 31, 2015 (bottom). The bottom image shows water in many places, pushing the last pieces of thick ice into the Wandel Sea and Fram Strait . [ click on...
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