Foken, T*: The energy balance closure problem
Talk, Atmospheric Transport and Chemistry in Forest Ecosystems, Thurnau: 2009-10-05 - 2009-10-08

Former assumptions that measuring errors or storage terms are the reason for the unclosed energy balance do not stand up because even turbulent fluxes derived from documented methods and calibrated sensors, net radiation, and ground heat fluxes cannot close the energy balance. Instead, exchange processes on larger scales of the heterogeneous landscape have a significant influence. By including these fluxes, the energy balance can be approximately closed. Therefore, the problem is a scale problem and has important consequences for the measurement and modelling of turbulent fluxes – not only the energy fluxes. The aim of the panel discussion is to address the consequences for trace gas fluxes and even reactive trace gas fluxes and to find a solution with which to handle this problem for quantitative flux studies.

last modified 2009-11-03