3 documents found, page 1 of 1
Leaf phenology as one important driver of seasonal changes in isoprene emission...
Alves, Eliane Gomes; Tóta, Júlio; Turnipseed, Andrew A.; Guenther, Alex B.; Vega Bustillos, José Oscar W.; Santana, Raoni Aquino Silva deIsoprene fluxes vary seasonally with changes in environmental factors (e.g., solar radiation and temperature) and biological factors (e.g., leaf phenology). However, our understanding of the seasonal patterns of isoprene fluxes and the associated mechanistic controls is still limited, especially in Amazonian evergreen forests. In this paper, we aim to connect intensive, field-based measurements of canopy isopre...
Seasonality of isoprenoid emissions from a primary rainforest in central Amazonia
Alves, Eliane Gomes; Jardine, Kolby J.; Tóta, Júlio; Jardine, Angela B.; Yáñez-Serrano, Ana Maria; Karl, Thomas G.; Tavares, Julia ValentimTropical rainforests are an important source of isoprenoid and other volatile organic compound (VOC) emissions to the atmosphere. The seasonal variation of these compounds is however still poorly understood. In this study, vertical profiles of mixing ratios of isoprene, total monoterpenes and total sesquiterpenes, were measured within and above the canopy, in a primary rainforest in central Amazonia, using a pr...
Leaf development and demography explain photosynthetic seasonality in Amazon ev...
Wu, Jin; Albert, Loren P.; Lopes, Aline Pontes; Restrepo-Coupé, Natalia; Hayek, Matthew N.; Wiedemann, Kenia T.; Guan, Kaiyu; Stark, Scott C.In evergreen tropical forests, the extent, magnitude, and controls on photosynthetic seasonality are poorly resolved and inadequately represented in Earth system models. Combining camera observations with ecosystem carbon dioxide fluxes at forests across rainfall gradients in Amazônia, we show that aggregate canopy phenology, not seasonality of climate drivers, is the primary cause of photosynthetic seasonality...