Each bar indicates a rain shower. The higher the bar, the more intense the shower.
Green line shows the groundwater table. The more negative the number, the deeper water is stored underground and the lower the availability of water in the soil.
Plants continuously exchange CO2 with the atmosphere. During the day, plants take up and use CO2 from the air for photosynthesis, in order to grow. On the other hand, plants also continuously emit CO2 as a result of maintenance processes. The net sum of this uptake and emission defines how much CO2 the forest absorbs. This net flux depends on many factors, including the season, the availability of sunlight and water, and the soil quality.
Research of Horemans et al. (2020) indicates that the Brasschaat forest was an overall source of CO2 before 2000, meaning that the forest emitted more than it absorbed. Carbon sequestration capacity thereafter improved over time, mainly due tothe soil recovering from acidification (after measures to restrict ‘acid rain’ were implemented by the government). Today the forest is an overall CO2 sink. This graph shows live data from this year’s CO2 balance at the Brasschaat site.
Bars indicate the net CO2 emission or uptake. Red bars show when the forest emits CO2, green bars when the forest absorbs CO2.