A most easy way as following: (1) git clone git://git.as.harvard.edu/bmy/GEOS-Chem-Libraries (2) revised the install.h in the downloaded file (3) the final install.h should be like the attachment (4) ./install.h (5) Noting: Beauce all libraries are staticly installed, ...
(1) create the fishnet (2) join the point to fishnet. click the fishnet to choose the joins and relates/join/join data from anther layer based on spatial location (3) join the M ij and N ij tables togother. (4) calculate the M ij /N ij (5) seelect the shapfile by Analysis tools/extract acoo ...
here is a mercury inventory available from AMAP: http://www.amap.no/mercury-emissions I also recommend ECCAD for searching for global inventory data: http://eccad.sedoo.fr