Fig. 3
From: The response of tropical rainforests to drought—lessons from recent research and future prospects
The 55-m high eddy flux tower set up in 2003 in French Guiana (Bonal et al. 2008) (credits D. Bonal). Equipment installed on top of the tower (above the canopy) allows to continuously monitor the gas exchange (CO2, H2O) between the atmosphere and the considered ecosystem (around 50–100 ha)