Previous UV Bulletin

UV bulletins are short reports on current UV levels at NSF network locations. They are posted bi-weekly between September and December when the "ozone hole" is affecting UV levels at our Austral sites.

Bulletin 1/2006, issued 9/20/06
Reporting period: 9/6/06 - 9/19/06

Synopsis:
All NSF network sites in Antarctica were affected by the ozone hole during the last two weeks, leading to relative increases in UV intensities. Absolute UV levels remained small because the Sun is still low in the sky. UV intensities at Ushuaia were not influenced by the ozone hole. The UV Index remained below 3.1 at all austral sites.

McMurdo Station, Antarctica:
McMurdo Station was affected by the ozone hole during the last two weeks. UV levels remained very low because the Sun did not rise by more than 11° above the horizon. The maximum UV Index was 0.6.

Palmer Station, Antarctica:
Total ozone at Palmer Station ranged between 140 and 280 DU according to measurements with a GUV radiometer. Solar elevations remained below 24°. The maximum UV Index was 3.1 and was observed on 9/17/06 when total ozone was 150 DU. Typical summer-time UV Indices range between 8 and 10 with maximum Indices exceeding 13.

South Pole, Antarctica:
At the South Pole, the Sun is still below the horizon and UV levels remain negligible.

Ushuaia, Argentina:
Measurements with a GUV radiometer indicate that total ozone at Ushuaia did not drop below 250 DU during the last two weeks. UV levels therefore remained moderate. The maximum UV Index was 3.1.

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