The results of this study clearly indicated a large spatial and temporal variability in CH₄ fluxes within and between lakes. The inlets in Lake Erssjön were hotspots for CH₄ emissions and the CH₄ emissions decreased after the fall overturn. Measurements with a high resolution both in time and space are needed not to miss important short term variations. The ebullition was lower with increasing depth and higher water temperature. Diffusion, however, was dependent on water temperature but did not change with depth. Therefore, a small shallow lake may release more CH₄ than a large lake. The open water part of Lake Följesjön released more CH₄ and it is shallower than Lake Erssjön. The significant differences in CH₄ emissions between the two lakes could mainly be explained by two measured complementary variables depth and P. The P concentrations reflects the productivity in the lake, connected to the productivity of the lake is the surroundings. The local condition have large effect on the CH₄ emissions, but the CH₄ emissions from lakes can also be effected on global changes. The CH₄ emissions will increase the global warming will increased water temperature will which will increase the CH₄ emission.