/img alt="Imagem da capa" class="recordcover" src="""/>
Artigo
Efeitos de um evento de friagem nas condições meteorológicas na Amazônia: um estudo de caso
Observations of the influence of a Cold Spell phenomena on meteorological variables and on energy and CO2 fluxes were made in a forest site near Ji-Paraná, Rondonia, during June 2001. Friagem caused a diminution of 35% at air temperature. A reduction of 75 W.m-2 from normal days (200 W.m-2) to cold...
Autor principal: | SOUZA, Paulo Jorge de Oliveira Ponte de |
---|---|
Outros Autores: | ROCHA, Edson José Paulino da, FISCH, Gilberto Fernando, KRUIJT, Bart, RIBEIRO, João Batista Miranda |
Grau: | Artigo |
Idioma: | por |
Publicado em: |
Instituto Nacional de Pesquisas da Amazônia
2011
|
Assuntos: | |
Acesso em linha: |
http://www.repositorio.ufpa.br:8080/jspui/handle/2011/2174 http://dx.doi.org/10.1590/S0044-59672004000400013 |
Resumo: |
---|
Observations of the influence of a Cold Spell phenomena on meteorological variables and on energy and CO2 fluxes were made in a forest site near Ji-Paraná, Rondonia, during June 2001. Friagem caused a diminution of 35% at air temperature. A reduction of 75 W.m-2 from normal days (200 W.m-2) to cold days (125 W.m-2) in the mean incoming solar radiation was also observed. During the Cold Spell days, both sensible heat (H) and latent heat fluxes (LE) showed a decrease in their mean daily value, showing a difference from normal days of 8 e 34%, respectively. The CO2 concentration remained constant, without increase during the night, due to the windy condition of cold days. During normal days the mean diurnal CO2 flux (-2,44 mmol m-2 s-1) was lesser than that one at phenomena days (-5,78 mmol m-2 s-1), while the mean nocturnal fluxes were +1,77mmol m-2 s-1 e +2,83mmol m-2 s-1 during normal and cold days, respectively. |