English   español  
Por favor, use este identificador para citar o enlazar a este item: http://hdl.handle.net/10261/108417
Compartir / Impacto:
Estadísticas
Add this article to your Mendeley library MendeleyBASE
Citado 25 veces en Web of Knowledge®  |  Pub MebCentral Ver citas en PubMed Central  |  Ver citas en Google académico
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Título

Weak response of oceanic dimethylsulfide to upper mixing shoaling induced by global warming

AutorVallina, Sergio M. ; Simó, Rafel ; Manizza, M.
Palabras claveGlobal modeling
Mixed layer depth
Solar radiation dose
Fecha de publicación9-oct-2007
EditorNational Academy of Sciences (U.S.)
CitaciónProceedings of the National Academy of Sciences 104(41): 16004-16009 (2007)
ResumenThe solar radiation dose in the oceanic upper mixed layer (SRD) has recently been identified as the main climatic force driving global dimethylsulfide (DMS) dynamics and seasonality. Because DMS is suggested to exert a cooling effect on the earth radiative budget through its involvement in the formation and optical properties of tropospheric clouds over the ocean, a positive relationship between DMS and the SRD supports the occurrence of a negative feedback between the oceanic biosphere and climate, as postulated 20 years ago. Such a natural feedback might partly counteract anthropogenic global warming through a shoaling of the mixed layer depth (MLD) and a consequent increase of the SRD and DMS concentrations and emission. By applying two globally derived DMS diagnostic models to global fields of MLD and chlorophyll simulated with an Ocean General Circulation Model coupled to a biogeochemistry model for a 50% increase of atmospheric CO2 and an unperturbed control run, we have estimated the response of the DMS-producing pelagic ocean to global warming. Our results show a net global increase in surface DMS concentrations, especially in summer. This increase, however, is so weak (globally 1.2%) that it can hardly be relevant as compared with the radiative forcing of the increase of greenhouse gases. This contrasts with the seasonal variability of DMS (1000-2000% summer-to-winter ratio). We suggest that the >plankton-DMS-clouds-earth albedo feedback> hypothesis is less strong a long-term thermostatic system than a seasonal mechanism that contributes to regulate the solar radiation doses reaching the earth's biosphere. © 2007 by The National Academy of Sciences of the USA
Descripción6 pages, 5 figures
Versión del editorhttp://dx.doi.org/10.1073/pnas.0700843104
URIhttp://hdl.handle.net/10261/108417
DOI10.1073/pnas.0700843104
Identificadoresdoi: 10.1073/pnas.0700843104
issn: 0027-8424
Aparece en las colecciones: (ICM) Artículos
Ficheros en este ítem:
Fichero Descripción Tamaño Formato  
16004.full.pdf649,09 kBAdobe PDFVista previa
Visualizar/Abrir
Mostrar el registro completo
 



NOTA: Los ítems de Digital.CSIC están protegidos por copyright, con todos los derechos reservados, a menos que se indique lo contrario.