Do you wanna get it how to generate a correlation map between point (txt, xls, etc.) and spatial (.nc,.cdf) data? Here you are!
Tools: PC, GrADS, MS Excel, Plato
Note: To get GrADS see GrADS Tool page in this website.
To get Plato go search for Silverfrost Plato (download a free version, otherwise buy it)
Files: sst_cdf_to_bin_conversion.gs (source code provided at the bottom of this page)
correlation_of_MAM_and_sst_2003_2012.gs (source code provided at the bottom of this page)
mam_2003_2012.ctl (source code provided at the bottom of this page)
mam_sst_2003_2012.ctl (source code provided at the bottom of this page)
tz_mam_2003_2012.for (source code provided at the bottom of this page)