Arctic Sea Ice Minimum Extent Reached

18 September 2009 Geoff Zeiss

As I blogged previously, the extent of Arctic sea ice is one of the most accessible sources of data showing the effect of global climate change.  The National Snow and Ice Data Center (NSIDC) began monitoring Arctic sea ice extents in 1978 using passive microwave satellites at a resolution of 25 km.  September 2007 was the lowest summer Arctic sea ice extent observed since NSIDC began monitoring and recording sea ice extents in 1978.

Arctic sea ice extent on September 12, 2009 was 5.10 million square
km. The orange line shows the median extent for that day for 1979
to 2000. The black cross is the
geographic North Pole.  The lowest extent of Arctic sea ice since 1979 was reached in 2007. The 2009 minimum is the third-lowest recorded since 1979, 580,000
square km above 2008 and 970,000 square
km above the record low in 2007.

Geoff Zeiss

Geoff Zeiss

Geoff Zeiss has more than 20 years experience in the geospatial software industry and 15 years experience developing enterprise geospatial solutions for the utilities, communications, and public works industries. His particular interests include the convergence of BIM, CAD, geospatial, and 3D. In recognition of his efforts to evangelize geospatial in vertical industries such as utilities and construction, Geoff received the Geospatial Ambassador Award at Geospatial World Forum 2014. Currently Geoff is Principal at Between the Poles, a thought leadership consulting firm. From 2001 to 2012 Geoff was Director of Utility Industry Program at Autodesk Inc, where he was responsible for thought leadership for the utility industry program. From 1999 to 2001 he was Director of Enterprise Software Development at Autodesk. He received one of ten annual global technology awards in 2004 from Oracle Corporation for technical innovation and leadership in the use of Oracle. Prior to Autodesk Geoff was Director of Product Development at VISION* Solutions. VISION* Solutions is credited with pioneering relational spatial data management, CAD/GIS integration, and long transactions (data versioning) in the utility, communications, and public works industries. Geoff is a frequent speaker at geospatial and utility events around the world including Geospatial World Forum, Where 2.0, MundoGeo Connect (Brazil), Middle East Spatial Geospatial Forum, India Geospatial Forum, Location Intelligence, Asia Geospatial Forum, and GITA events in US, Japan and Australia. Geoff received Speaker Excellence Awards at GITA 2007-2009.

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