Terrestrial carbon export via inland aquatic systems is a key process in the global carbon
cycle. It includes loss of carbon to the atmosphere via outgassing from rivers, lakes, or …

Production and consumption processes in soils contribute to the global cycles of many trace
gases (CH4, CO, OCS, H2, N2O, and NO) that are relevant for atmospheric chemistry and …

Many freshwater lakes are supersaturated in CO2 with respect to the atmosphere. This
concentration gradient implies a net flux of CO2 from the water to the air. The actual rate of …

The naturally occurring isotope radon-222 (222 Rn) is widely employed as a tracer for
groundwater discharge to lakes, lagoons, rivers, estuaries, and coastal oceans. Owing to the …

Submarine groundwater discharge (SGD) into the coastal zone has received increased
attention in the last few years as it is now recognized that this process represents an …

We are writing this comment to call attention to large uncertainties in the estimates of CO2
flux from rivers and estuaries, a topic that has been receiving considerable attention recently …

Water resources are of enormous societal and ecological importance. In coastal areas, they
are under ever greater pressure due to population growth, more affluent lifestyles, food …

Net ecosystem production (NEP) is the difference between gross primary production (GPP)
and community respiration (R). We estimated in situ NEP using three independent …

Outgassing of carbon dioxide (CO2) from rivers and streams to the atmosphere is a major
loss term in the coupled terrestrial‐aquatic carbon cycle of major low‐gradient river systems …

Nitrous oxide (N2O) emissions from lakes exhibit significant spatiotemporal heterogeneity,
and quantitative identification of the different N2O production processes is greatly limited …