Title: Images of internal tides near the Norwegian continental slope
Authors: W. Steven Holbrook: Department of Geology and Geophysics, University of Wyoming, Laramie, Wyoming, USA; Ilker Fer: Geophysical Institute, University of Bergen, Bergen, Norway; Raymond W. Schmitt: Department of Physical Oceanography, Woods Hole Oceanographic Institution, Woods Hole, Massachusetts, USA.
Source: Geophysical Research Letters (GRL) paper 10.1029/2009GL038909, 2009 http://dx.doi.org/10.1029/2009GL038909
2. Ice is "rotten" in the Beaufort Sea
Recent observations show that Beaufort Sea ice was not as it appeared in the summer of 2009. Sea ice cover serves as an indication of climate and has implications for marine and terrestrial ecosystems. In early September 2009, satellite measurements implied that most of the ice in the Beaufort Sea either was thick ice that had been there for multiple years or was thick, first-year ice. However, in situ observations made in September 2009 by Barber et al. show that much of the ice was in fact "rotten" iceice that is thinner, heavily decayed, and structurally weak due to a uniform temperature throughout. The authors suggest that satellite measurements were confused because both types of ice exhibit similar temperature and salinity profiles near their surfaces and a similar amount of open water between flows. The authors note that while an increase in summer minimum ice extent in the past 2 years could give the impression that Arctic ice is recovering, these new results show that multiyear ice in fact is still declining. The results have implications for climate science and marine vessel transport in the Arctic.
Perennial pack ice in the southern Beaufort Sea was not
|Contact: Maria-Jose Vinas|
American Geophysical Union