Kristin Laidre, a marine mammal biologist, has taken more than thirty trips to the Arctic, many of them to study the mysterious narwhal. Although the narwhal has appeared in stories throughout history, scientists are just beginning to understand this quirky creature with a fierce survival instinct. But in recent years, a series of unusual events led Laidre to wonder if narwhals are being caught off guard by changes in their unforgiving environment…

Humans currently release about 70 million tons of carbon dioxide every day into the atmosphere and about 20 million tons is being absorbed regularly by the oceans, causing the pH to drop.  Chris Sabine describes current and projected future impacts of this acidification on marine ecology.

This year’s Arctic Report Card emphasizes that climate change is more prominent in the Arctic than at lower latitudes.

Phytoplankton productivity has increased 20 percent over the past decade as sea ice extent declines and more open water habitat is available.

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