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- W2910661619 abstract "climatological mean monthly distributions of ph in the total h scale total co2 concentration tco2 and the degree of caco3 saturation for the global surface ocean waters excluding coastal areas are calculated using a data set for pco2 alkalinity and nutrient concentrations in surface waters depths less than 50 m which is built upon the glodap carina and ldeo database the mutual consistency among these measured parameters is demonstrated using the inorganic carbon chemistry model with the dissociation constants for carbonic acid by lueker et al 2000 and for boric acid by dickson 1990 the global ocean is divided into 24 regions and the linear potential alkalinity total alkalinity nitrate versus salinity relationships are established for each region the mean monthly distributions of ph and carbon chemistry parameters for the reference year 2005 are computed using the climatological mean monthly pco2 data adjusted to a reference year 2005 and the alkalinity estimated from the potential alkalinity versus salinity relationships the climatological monthly mean values of pco2 over the global ocean are compiled for a 4â x 5â grid for the reference year 2005 and the gridded data for each of 12 months are included in this database this is updated version of takahashi et al 2009 for the reference year 2000 representing non el nia o years using a database of about 6 5 million pco2 data less coastal areas of north and south america observed in 1957 2012 takahashi et al 2013 the equatorial zone 4â n 4â s of the pacific is excluded from the analysis because of the large interannual changes associated with the el nia o southern oscillation events the ph thus calculated ranges from 7 9 to 8 2 lower values are located in the upwelling regions in the tropical pacific and in the arabian and bering seas and higher values are found in the subpolar and polar waters during the spring summer months of intense photosynthetic production the vast areas of subtropical oceans have seasonally varying ph values ranging from 8 05 during warmer months to 8 15 during colder months the warm tropical and subtropical waters are supersaturated by a factor of as much as 4 2 with respect to aragonite and 6 3 for calcite whereas the cold subpolar and polar waters are less supersaturated only by 1 2 for aragonite and 2 for calcite because of the lower ph values resulting from greater tco2 concentrations in the western arctic ocean aragonite undersaturation is observed" @default.
- W2910661619 created "2019-01-25" @default.
- W2910661619 date "2018-01-01" @default.
- W2910661619 modified "2023-09-27" @default.
- W2910661619 title "Climatological Distributions of pH, pCO2, Total CO2, Alkalinity, and CaCO3 Saturation in the Global Surface Ocean (NCEI accession 01645680) (NCEI Accession 0164568)" @default.
- W2910661619 hasPublicationYear "2018" @default.
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