I am looking for a way to track wind direction and speed with another
quantity (basically an increase in nuclear radiation in Japan). I should be
able to get the wind speed and direction data. I have the radiation data. I
cannot really think of how to look for a correlation that would show that
this second quantity (nuclear) is being "carried" by the wind. The wind
obviously moves in 2 dimensions (3 but I will ignore the vertical). Can
anyone suggest some way to show this? My radiation data is measured in an
approximately 400 by 400 km region which has been subdivided into
approximately 1000 rectangular regions. There is one data point per day per
region.
 Any suggestions?

Thank you!

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