Critical Zone Observatory in Pianosa Island: Accumulation chambers n.3 and n.4 (27/03/2023-03/04/2024)

The installed instrumentation allows CO2 flux measurements from soil (emission and absorption/uptake) by non steady state closed dynamic accumulation Chambers. The aim is to understand if the NEE (Net Ecosystem Exchange) is increasing or decreasing and which parameters most affect this important index. More over, the NEE parameter is extremely useful in climate models. In particular chamber n.3 is a dark chamber and measures the ecosystem respiration while chamber n.4 is a transparent chamber and measures the NEE. The difference between the flux measured by chamber n.4 and that measured by chamber n.3 allows to calculate the GPP (Gross Primary Production). The dataset includes the Net Ecosystem Exchange (NEE), Ecosystem Respiration (ER), air temperature and atmospheric pressure inside the chamber, soil temperature and soil humidity next to the chamber. It is also available the R2 of the regression line of the CO2 concentration versus time, of each chamber.