Data/hora: 14/06/2024 02:59:36

Provedor de dados: 	5	
País: 	France	
Título: 	Trends and drivers in global surface ocean pH over the past 3 decades	
Autores: 	Lauvset, S. K.; Gruber, N.; Landschuetzer, P.; Olsen, A.; Tjiputra, J.	
Data: 	2015-03-02	
Ano: 	2015	
Resumo: 	We report global long-term trends in surface ocean pH using a new pH data set computed by combining fCO(2) observations from the Surface Ocean CO2 Atlas (SOCAT) version 2 with surface alkalinity estimates based on temperature and salinity. Trends were determined over the periods 1981-2011 and 1991-2011 for a set of 17 biomes using a weighted linear least squares method. We observe significant decreases in surface ocean pH in similar to 70% of all biomes and a mean rate of decrease of 0.0018 +/- 0.0004 yr 1 for 1991-2011. We are not able to calculate a global trend for 19812011 because too few biomes have enough data for this. In half the biomes, the rate of change is commensurate with the trends expected based on the assumption that the surface ocean pH change is only driven by the surface ocean CO2 chemistry remaining in a transient equilibrium with the increase in atmospheric CO2. In the remaining biomes, deviations from such equilibrium may reflect that the trend of surface ocean fCO(2) is not equal to that of the atmosphere, most notably in the equatorial Pacific Ocean, or may reflect changes in the oceanic buffer (Revelle) factor. We conclude that well-planned and long-term sustained observational networks are key to reliably document the ongoing and future changes in ocean carbon chemistry due to anthropogenic forcing.	
Tipo: 	Text	
Idioma: 	Inglês	
Identificador: 	https://archimer.ifremer.fr/doc/00292/40342/38939.pdf

https://archimer.ifremer.fr/doc/00292/40342/81223.pdf

DOI:10.5194/bg-12-1285-2015

https://archimer.ifremer.fr/doc/00292/40342/	
Editor: 	Copernicus Gesellschaft Mbh	
Relação: 	info:eu-repo/grantAgreement/EC/FP7/264879/EU//CARBOCHANGE	
Formato: 	application/pdf	
Fonte: 	Biogeosciences (1726-4170) (Copernicus Gesellschaft Mbh), 2015-03-02 , Vol. 12 , N. 5 , P. 1285-1298	
Fonte: 	Author(s) 2015. CC Attribution 3.0 License

info:eu-repo/semantics/openAccess

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