“…Geostatistical approaches have been applied to many fields in the Earth and environmental sciences, including geology, ecology, and hydrology to study spatial phenomena (e.g., Chiles and Delfiner, 1999;Webster and Oliver, 2007). In studying land-atmosphere carbon dynamics, geostatistical inversion modeling has been used to estimate the spatial distribution of carbon sources and sinks both globally, and regionally over North America (e.g., Michalak et al, 2004;Gourdji et al, , 2010Mueller et al, 2008). Geostatistical regression approaches, such as the one described here, have been used regionally to evaluate the relationship between environmental variables (e.g., Erickson et al, 2005), and have recently been applied to evaluate the potential controls on carbon uptake and release at flux tower sites in North America (NA) (e.g., Mueller et al, 2010;Yadav et al, 2010).…”