Climate gases – Carbon dioxide concentrations and exchange in lakes and streams across Denmark and Europe

Available chemical data and measuring chambers are used to measure and calculate carbon dioxide concentrations and exchange in lakes and streams throughout the hydrological network in Denmark and Scandinavia. These values are used to evaluate the importance of freshwaters in national and international greenhouse gas budgets. Also, the effect of rewetting low-lying soils can be evaluated.

We demonstrate that lakes and streams are hot spots in carbon dynamics and carbon dioxide emission on national and international scales. Converting drained, cultivated farmland to nature areas is an effective strategy to reduce national carbon dioxide emission and stimulate biodiversity.


Name Title Phone E-mail
Kaj Sand-Jensen Professor +4535330124 E-mail

Funded by

Cowi logo
Aage V Jensen Naturfond logo

Period: 2017-2020
PI: Kaj Sand-Jensen


Professor Kaj Sand-Jensen
Freshwater Biology Section
Universitetsparken 4
DK-2100 Copenhagen Ø
Phone: +45 3533 0124

External members

Name Title Affiliation
Theis Kragh Associate professor SDU