So-called squall lines frequently bring thunderstorms to the Amazon region. With them comes a lot of rain, but also heavy, turbulent winds. This new study analyzes their impacts on surface meteorology and CO2 fluxes.
Ivan Kourtchev and his colleagues discovered a so-called “forever chemical”, one particular PFAS substance, in the pristine rainforest at ATTO. Their analysis suggests that the compounds, which are banned due to their health risks, were not emitted locally, but were transported to the site over long distances.
Direct measurements of OH radicals are rare and difficult to achieve. However, since they react with BVOCs, Ringsdorf et al. inferred them from isoprene measurements at ATTO. To do so, they applied a technique called ‘Dynamical Time Warping’ from the field of speech recognition. Akima Ringsdorf et al. published the study “Inferring the diurnal variability of OH radical concentrations over the Amazon from BVOC measurements” Open Access in Nature Scientific Reports.
Eliane Gomes Alves and her colleagues measured isoprene emissions at the ATTO 80-meter tower across three years to better understand how these emissions vary seasonally and under extreme climatic conditions like El Niño events. They also looked into which biological and environmental factors regulate the emission of isoprene to the atmosphere.
In a new study, Anne Mendonça, Cléo Quaresma, Daniel Marra and their co-authors analyzed different turbulence regimes at the ZF2 site as part of the ATTO-INVENTA project. They also investigated how turbulence is connected to the occurrence of downdrafts and extreme wind gusts, that might lead to tree mortality.
