Om is och sol

I det förra inlägget diskuterade vi bl.a. den arktiska isen. Senaste data från NSIDC tyder på att havsisens utbredning ligger under genomsnittet för 1979-2000, men just nu över värdena för 2007.

Man har noterat att det råder liknande vindförhållanden som under 2007, vilket kan innebära att isen smälter mer än under rekordåret 2007, då vinden blåste havsisen mot varmare vatten. Den kommande månaden kommer utan tvekan att bli intressant.
På solfronten är det fortfarande mycket lugnt. Nedan den senaste rapporten från SWPC:

From the Space Weather Prediction Center

Updated 2009 Jul 06 2201 UTC

Joint USAF/NOAA Report of Solar and Geophysical Activity

SDF Number 187 Issued at 2200Z on 06 Jul 2009

Analysis of Solar Active Regions and Activity from 05/2100Z to 06/2100Z: Solar activity was low. Region 1024 (S27W26) produced an isolated C1/Sf flare at 06/1705Z. Region 1024 showed minor decay with loss of some intermediate spots, but retained a mix of polarities near region center.

Solar Activity Forecast: Solar activity is expected to be very low with a chance for an isolated C-class flare.

Geophysical Activity Summary 05/2100Z to 06/2100Z: Geomagnetic field activity was at quiet levels.

Geophysical Activity Forecast: Geomagnetic field activity is expected to be at quiet levels during days 1 – 2 (07 – 08 July). Activity is expected to increase to quiet to unsettled levels on day 3 (09 July) due to an increase in solar wind velocities associated with a favorably positioned coronal hole.

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