5 documents found, page 1 of 1
Long term measurements of aerosol optical properties at a primary forest site i...
Rizzo, L. V.; Artaxo, Paulo; Müller, Thomas; Wiedensohler, Alfred; Paixão, Melina; Cirino, Glauber G.; Arana, Andréa A.; Swietlicki, ErikA long term experiment was conducted in a primary forest area in Amazonia, with continuous in-situ measurements of aerosol optical properties between February 2008 and April 2011, comprising, to our knowledge, the longest database ever in the Amazon Basin. Two major classes of aerosol particles, with significantly different optical properties were identified: coarse mode predominant biogenic aerosols in the wet...
Characterization of active and total fungal communities in the atmosphere over ...
Womack, Ann M.; Artaxo, Paulo; Ishida, Francoise Yoko; Mueller, Rebecca C.; Saleska, Scott Reid; Wiedemann, Kenia T.; Bohannan, Brendan J.M.Fungi are ubiquitous in the atmosphere and may play an important role in atmospheric processes. We investigated the composition and diversity of fungal communities over the Amazon rainforest canopy and compared these communities to fungal communities found in terrestrial environments. We characterized the total fungal community and the metabolically active portion of the community using high-throughput DNA and ...
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...
Modeling the radiative effects of biomass burning aerosols on carbon fluxes in ...
Moreira, Demerval S.; Longo, Karla M.; Freitas, Saulo R.; Yamasoe, Marcia A.; Mercado, Lina M.; Rosário, Nilton E.; Gloor, Emauel; Viana, Rosane S. M.Every year, a dense smoke haze covers a large portion of South America originating from fires in the Amazon Basin and central parts of Brazil during the dry biomass burning season between August and October. Over a large portion of South America, the average aerosol optical depth at 550 nm exceeds 1.0 during the fire season, while the background value during the rainy season is below 0.2. Biomass burning aeroso...
Modeling the radiative effects of biomass burning aerosols on carbon fluxes in ...
Moreira, Demerval S. [UNESP]; Longo, Karla M.; Freitas, Saulo R.; Yamasoe, Marcia A.; Mercado, Lina M.; Rosário, Nilton E.; Gloor, EmauelMade available in DSpace on 2018-12-11T17:23:43Z (GMT). No. of bitstreams: 0 Previous issue date: 2017-12-12; Every year, a dense smoke haze covers a large portion of South America originating from fires in the Amazon Basin and central parts of Brazil during the dry biomass burning season between August and October. Over a large portion of South America, the average aerosol optical depth at 550 nm exceeds 1.0 d...