Energy balance closure of two bog surfaces in central Sweden

摘要: Typical bogs in the boreal forest zone can be characterised by hummock and hollow micro-topography sparsely vegetated surfaces. Their energy balance has been studied much less than for other types of surface, i.e. fields forests. Micrometeorological measurements were carried out central Sweden at two different summer seasons. From measured profiles wind speed, air temperature humidity, turbulent sensible latent heat fluxes calculated according to Monin-Obukhov similarity theory. The daytime typically similar size, with still being slightly higher. Independent turbulent, radiative ground allowed consider surface closure. During fair weather conditions, net radiation exceeded sum up 200 W m-2 when flux plates used analysis. It is difficult attribute this discrepancy errors fluxes, because fetch was long enough (400 m or more). Also, size shape positions tower different, but discrepancies budget very similar. is, however, known that peat are problematic. low considered most unreliable component balance. An alternative method from literature, which did not require any information on soil thermal properties near ground-heat-flux calculations. use improved closure balance, an about 100 large remained unexplained. A further improvement expected lateral exchange hummocks could taken into account. (Less)