First is from Arctic Regional Ocean Observing System (Arctic ROOS)
Date: August 9, 2010 - open passage - this is over a month earlier than the below announcement.
Next is the Naval Ice Center announcement on September 19, 2010
Figure 1: Shows an Annotated Image of ENVISAT (©European Space Agency) and RADARSAT (©MDA), and MODIS of the Northwest Passage Sea Route Opening as analyzed on September 20, 2010.
September 20, 2010, Washington, DC — September 20, 2010, the National Ice Center (NIC) identified the opening of the Northwest Passage through the Arctic. RADARSAT, ENVISAT, and MODIS imagery from the 18-20 of September, 2010, depicts only trace amounts of multi-year ice remaining in the Northwest Passage. Although the satellite imagery shows the area as "open water", conditions such as water on top of the ice, currents, winds and waves may obscure multi-year ice drifting in the area, and hazardous remnants of the older ice may still pose a threat to shipping.
The National Ice Center is a tri-agency operational center represented by the United States Navy (Department of Defense), the National Oceanic and Atmospheric Administration (Department of Commerce), and the United States Coast Guard (Department of Homeland Security). The National Ice Center mission is to provide the highest quality strategic and tactical ice services tailored to meet the operational requirements of U.S. national interests and to provide specialized meteorological and oceanographic services to United States government agencies. The National Ice Center, along with the Canadian Ice Service will continue to monitor the opening.
For more information, please contact:
Public Affairs Officer
National Ice Center
Naval Ice Center
If you have any comments or suggestions, please E-mail the National Ice Center Public Affairs Officer.
Are there other sources of sea ice data? How do these sources differ from NSIDC data?
- University of Bremen Daily Updated AMSR-E Sea Ice Maps: http://www.iup.uni-bremen.de:8084/amsr/amsre.html
- IARC-JAXA Arctic Sea-Ice Monitor by AMSR-E: http://www.ijis.iarc.uaf.edu/cgi-bin/seaice-monitor.cgi
- University of Illinois Cryosphere Today: http://arctic.atmos.uiuc.edu/cryosphere/
- Nansen Environmental & Remote Sensing Center Arctic Regional Ocean Observing System: http://arctic-roos.org/observations
- U.S. National Ice Center: http://www.natice.noaa.gov/
- Canadian Ice Service: http://ice-glaces.ec.gc.ca/
Who are you going to believe? 30 days difference is unacceptable - I'm asking the U.S. National Ice Center (NOAA) to comment.
Standby for updates.
Last Update: September 13, 2010
Northern Sea Route Opening
September 13, 2010, Washington, DC — September 13, 2010, the National Ice Center (NIC) identified the opening of the Northern Sea Route through the Arctic. RADARSAT and ENVISAT imagery from the 12-13 of September, 2010, depicts only trace amounts of multi-year ice remaining in the Northern Sea Route. The Northeast Passage is historically the last hold-out of remaining multi-year ice affecting the Northern Sea Route. Although the satellite imagery shows the area as "open water", conditions such as water on top of the ice, currents, winds and waves may obscure multi-year ice drifting in the area, and hazardous remnants of the older ice may still pose a threat to shipping.