In order to examine the relationship between soil microbial communities and trace gas fluxes across the soil-atmosphere interface, I want to collect all co-located measurements of these two kinds. I want to limit my database to only those that were collected in the same ecosystem or vegetation type within 1 mile of each other, and within 2 years of each other. If there are multiple measurements of both types, I want them paired by first closeness in terms of distance, and then by closeness in terms of time.
In order to examine the relationship between soil microbial communities and trace gas fluxes across the soil-atmosphere interface, I want to collect all co-located measurements of these two kinds. I want to limit my database to only those that were collected in the same ecosystem or vegetation type within 1 mile of each other, and within 2 years of each other. If there are multiple measurements of both types, I want them paired by first closeness in terms of distance, and then by closeness in terms of time.