Use este identificador para citar ou linkar para este item:
https://repositorio.inpa.gov.br/handle/1/14903
Registro completo de metadados
Campo DC | Valor | Idioma |
---|---|---|
dc.contributor.author | Alves, Eliane Gomes | - |
dc.contributor.author | Tóta, Júlio | - |
dc.contributor.author | Turnipseed, Andrew A. | - |
dc.contributor.author | Guenther, Alex B. | - |
dc.contributor.author | Vega Bustillos, José Oscar W. | - |
dc.contributor.author | Santana, Raoni Aquino Silva de | - |
dc.contributor.author | Cirino, Glauber G. | - |
dc.contributor.author | Tavares, Julia Valentim | - |
dc.contributor.author | Lopes, Aline Pontes | - |
dc.contributor.author | Nelson, Bruce Walker | - |
dc.contributor.author | Souza, Rodrigo Augusto Ferreira de | - |
dc.contributor.author | Gu, Dasa | - |
dc.contributor.author | Stavrakou, Trissevgeni | - |
dc.contributor.author | Adams, David K. | - |
dc.contributor.author | Wu, Jin | - |
dc.contributor.author | Saleska, Scott Reid | - |
dc.contributor.author | Manzi, Antônio Ocimar | - |
dc.date.accessioned | 2020-05-07T13:47:18Z | - |
dc.date.available | 2020-05-07T13:47:18Z | - |
dc.date.issued | 2018 | - |
dc.identifier.uri | https://repositorio.inpa.gov.br/handle/1/14903 | - |
dc.description.abstract | Isoprene 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 isoprene flux over a central Amazonian evergreen forest site with meteorological observations and with tower-mounted camera leaf phenology to improve our understanding of patterns and causes of isoprene flux seasonality. Our results demonstrate that the highest isoprene emissions are observed during the dry and dry-to-wet transition seasons, whereas the lowest emissions were found during the wet-to-dry transition season. Our results also indicate that light and temperature cannot totally explain isoprene flux seasonality. Instead, the camera-derived leaf area index (LAI) of recently mature leaf age class (e.g., leaf ages of 3-5 months) exhibits the highest correlation with observed isoprene flux seasonality (R2 = 0.59, p < 0.05). Attempting to better represent leaf phenology in the Model of Emissions of Gases and Aerosols from Nature (MEGAN 2.1), we improved the leaf age algorithm by utilizing results from the camera-derived leaf phenology that provided LAI categorized into three different leaf ages. The model results show that the observations of age-dependent isoprene emission capacity, in conjunction with camera-derived leaf age demography, significantly improved simulations in terms of seasonal variations in isoprene fluxes (R2 = 0.52, p < 0.05). This study highlights the importance of accounting for differences in isoprene emission capacity across canopy leaf age classes and identifying forest adaptive mechanisms that underlie seasonal variation in isoprene emissions in Amazonia. © 2018 Author(s). | en |
dc.language.iso | en | pt_BR |
dc.relation.ispartof | Volume 15, Número 13, Pags. 4019-4032 | pt_BR |
dc.rights | Attribution-NonCommercial-NoDerivs 3.0 Brazil | * |
dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/3.0/br/ | * |
dc.subject | Age Class | en |
dc.subject | Algorithm | en |
dc.subject | Emission | en |
dc.subject | Environmental Factor | en |
dc.subject | Evergreen Forest | en |
dc.subject | Flux Measurement | en |
dc.subject | Forest Canopy | en |
dc.subject | Isoprene | en |
dc.subject | Leaf | en |
dc.subject | Leaf Area Index | en |
dc.subject | Phenology | en |
dc.subject | Seasonal Variation | en |
dc.subject | Seasonality | en |
dc.subject | Amazonia | en |
dc.title | Leaf phenology as one important driver of seasonal changes in isoprene emissions in central Amazonia | en |
dc.type | Artigo | pt_BR |
dc.identifier.doi | 10.5194/bg-15-4019-2018 | - |
dc.publisher.journal | Biogeosciences | pt_BR |
Aparece nas coleções: | Artigos |
Arquivos associados a este item:
Arquivo | Descrição | Tamanho | Formato | |
---|---|---|---|---|
artigo-inpa.pdf | 2,22 MB | Adobe PDF | Visualizar/Abrir |
Este item está licenciada sob uma Licença Creative Commons