Inferring &amp;lt;sup&amp;gt;222&amp;lt;/sup&amp;gt;Rn soil fluxes from ambient &amp;lt;sup&amp;gt;222&amp;lt;/sup&amp;gt;Rn activity and eddy covariance measurements of CO&amp;lt;sub&amp;gt;2&amp;lt;/sub&amp;gt;
Atmospheric measurement techniques