December 11 - NOAA released the 2018 Arctic Report Card at the American Geophysical Union fall meeting in Washington, D.C today bringing together the work of 81 scientists from 12 nations to provide the latest in peer-reviewed, actionable environmental information on the current state of the Arctic environmental system relative to historical records.
The Arctic continued it long-term warming trend in 2018, warming at twice the rate relative to the rest of the globe with Arctic air temperatures for the past five years (2014-18) exceeding all previous records since 1900. Arctic sea ice in 2018 remained younger, thinner, and covered less area than in the past. The 12 lowest extents in the satellite record have occurred in the last 12 years. In the Bering Sea, winter sea ice extent reached a record low for virtually the entire 2017-2018 ice season, which typically begins to form at the beginning of October, expands through the winter and then melts through the spring. During two weeks in February, typically the height of winter, the Bering Sea lost significant ice cover, about ~215,000 km2 or about the size of Idaho. Ocean primary productivity levels in 2018 were sometimes 500% higher than normal levels in the Bering Sea which is linked to the record low sea ice extent in the region. The Bering Sea is an important commercial fishing region and supports a vibrant sea ice-ecosystem with abundant seals, birds, and other pelagic species that critically depend on the timing of sea ice formation and retreat.
Continued warming of the Arctic atmosphere and ocean are driving broad change in the environmental system in predicted and, also, unexpected ways. New emerging threats are taking form and highlighting the level of uncertainty in the breadth of environmental change that is to come. For more details, visit the Arctic Report Card website: https://arctic.noaa.gov/Report-Card
Read the NOAA Press Release here.
Watch the video highlights on YouTube here
PMEL in the News
The National Oceanic and Atmospheric Administration's 2018 Arctic Report Card, released this week, warns that a warming Arctic is causing widespread environmental changes. These changes are due in part to the ways the Arctic affects ocean currents around the world. Greg Johnson is featured.
Scientists say another mass of warmer than normal water is slowly re-emerging in the Gulf of Alaska. KTOO Public Media in Juneau reports the new "blob" could affect weather and fisheries in southeast Alaska, but scientists say it doesn't appear as strong as the one first noted in 2013. Nick Bond...
The Blob could be back. Or, maybe it’s the Son of Blob. Either way, the warm water phenomenon first discovered in the North Pacific five years ago is slowly reemerging in the Gulf of Alaska. Nick Bond is quoted.
Projections of Arctic sea ice through the end of the 21st century indicate the likelihood of a strong reduction in ice area and thickness in all seasons, leading to a substantial thermodynamic influence on the overlying atmosphere. In this study, the authors identified patterns of wind changes in four seasons across the Arctic and their likely causal mechanisms, particularly those associated with sea ice loss.
The authors compared the outputs from the... more