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During July, NSIDC was forecasting a September minimum of 4.74 million km²
http://www.arcus.org/search/seaiceoutlook/2010/july
In the August report, they have upped their forecast to 5.0 million km². This is just below my submitted estimate of 5.1 for the minimum, down from my June forecast of 5.5 million.
http://www.arcus.org/search/seaiceoutlook/2010/august
In June, NSIDC also forecast 5.5, which was identical to my June forecast.
Different methodologies, but we seem to be converging on similar numbers.
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