January 2014 Southern Hemisphere Background Radiation Level Report.

Monitoring Station Location

http://sccc.org.au/monitoring/Australian-Map.jpg

Summary

January 2014 month average background radiation level was 41 % above the pre-Fukushima 4 year average. This is better than the recorded January 2013,  52% above average, and January 2012, 43% above average. This suggests at this location, the Southern hemisphere increasing background levels have stabilized. It means it hasn't gotten worse, but it is still higher than pre-Fukushima levels for this time of the year. The average 4 year per Fukushima Nuclear disaster local background radiation level recorded from 2007 to 2011, was 0.10 uSv/hr.

2007 to 2011


The spike in this chart around August and September 2008 is mystery. It may have been caused by the operator experimenting.

More Technical Information and Charts

This short animation of Northern, and Southern Hemisphere air circulation, shows why we can get detections so far south.

Comparing the month and day average, (Charts are providede below.)

a. There is definitely a seasonal variation in local background levels. A seasonal variation very clearly shows in all the monthly average charts.

b. The considerable variation in month averages indicates there is more Northern Hemisphere to Southern Hemisphere air flow break through in the warmer summer months, than in the colder winter months.

c. January 2012 day average chart shows whatever was in the air was not mixed as well as in 2013 and 2014. This can be seen by the dramatic swings in the day averages for 2012, when you compared with the day average charts of 2013 and 2014.

d. Something major must have occurred at Fukushima in late 2012 and early 2013, to have caused such a dramatic month average increase for January 2013. Note that for January 2013 most of the month was dry, drought conditions here. The drought was broken by a significant rain event around the 26th January.

January Day Average Year Chart Comparisons from 2012 to 2014

Explanation of the alert level colour coding in the charts.

http://sccc.org.au/what-does-each-step-in-the-alert-level-colour-code-mean


January 2014 day average chart

January 2013 day average chart

January 2012 day average chart


January Month Average Year Chart Comparisons from 2012 to 2014

2014 month average chart

2013 month average chart

2012 month average chart


More detailed local background Radiation level information can be found here.

http://sccc.org.au/archives/2861



Disclaimer: This is an amateur volunteer run service. Human error can provide incorrect information, and equipment malfunction can produce false readings. Do not rely on, or take action upon information presented on this web site, without further research. Views expressed in the pages or images on the SCCC Inc., site are the personal opinions of the relevant writers, and are not necessarily representative of those of SCCC Inc.