Data Description

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Citation:
Kranz, SA et al. (2010): Seawater carbonate chemistry, chlorophyll a and phosphate during experiments with Trichodesmium erythraeum IMS101 (CCMP1985), 2010. doi:10.1594/PANGAEA.777419,
Supplement to: Kranz, Sven A; Wolf-Gladrow, Dieter; Nehrke, Gernot; Langer, Gerald; Rost, Björn (2010): Calcium carbonate precipitation induced by the growth of the marine cyanobacteria Trichodesmium. Limnology and Oceanography, 55(6), 2563-2569, doi:10.4319/lo.2010.55.6.2563
Abstract:
In this laboratory study, we monitored the buildup of biomass and concomitant shift in seawater carbonate chemistry over the course of a Trichodesmium bloom under different phosphorus (P) availability. During exponential growth, dissolved inorganic carbon (DIC) decreased, while pH increased until maximum cell densities were reached. Once P became depleted, DIC decreased even further and total alkalinity (TA) dropped, accompanied by precipitation of aragonite. Under P-replete conditions, DIC increased and TA remained constant in the postbloom phase. A diffusion-reaction model was employed to estimate changes in carbonate chemistry of the diffusive boundary layer. This study demonstrates that Trichodesmium can induce precipitation of aragonite from seawater and further provides possible explanations about underlying mechanisms.
Project(s):
Comment:
In order to allow full comparability with other ocean acidification data sets, the R package seacarb (Lavigne and Gattuso, 2011) was used to compute a complete and consistent set of carbonate system variables, as described by Nisumaa et al. (2010). In this dataset the original values were archived in addition with the recalculated parameters (see related PI).
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethodComment
1Experimental treatment *Exp trtmKranz, Sven A *
2Comment *CommentKranz, Sven A *
3Experiment day *Exp daydayKranz, Sven A *
4Light:Dark cycle *L:Dhh:hhKranz, Sven A *Measured *
5Radiation, photosynthetically active *PARµE/m2/sKranz, Sven A *
6Salinity *SalKranz, Sven A *Conductivity meter (WTW, Weilheim, Gemany) *
7Temperature, water *Temp°CKranz, Sven A *
8Species *SpeciesKranz, Sven A *
9Chlorophyll a *Chl aµg/lKranz, Sven A *see reference(s) *
10Phosphate *PO4µmol/lKranz, Sven A *
11Total carbon *TCµmol/kgKranz, Sven A *Auto-analyzer, Technicon Traacs 800 *
12pH *pHKranz, Sven A *Calculated using CO2SYS *Total scale
13Alkalinity, total *ATµmol/kgKranz, Sven A *Alkalinity, Gran titration (Gran, 1950) *
14Aragonite saturation state *Omega ArgKranz, Sven A *Calculated using CO2SYS *
15Carbonate system computation flag *CSC flagNisumaa, Anne-Marin *Calculated using seacarb after Nisumaa et al. (2010) *
16pH *pHNisumaa, Anne-Marin *Calculated using seacarb after Nisumaa et al. (2010) *Total scale
17Carbon dioxide *CO2µmol/kgNisumaa, Anne-Marin *Calculated using seacarb after Nisumaa et al. (2010) *
18Partial pressure of carbon dioxide (water) at sea surface temperature (wet air) *pCO2water_SST_wetµatmNisumaa, Anne-Marin *Calculated using seacarb after Nisumaa et al. (2010) *
19Fugacity of carbon dioxide (water) at sea surface temperature (wet air) *fCO2water_SST_wetµatmNisumaa, Anne-Marin *Calculated using seacarb after Nisumaa et al. (2010) *
20Bicarbonate ion *[HCO3]-µmol/kgNisumaa, Anne-Marin *Calculated using seacarb after Nisumaa et al. (2010) *
21Carbonate ion *[CO3]2-µmol/kgNisumaa, Anne-Marin *Calculated using seacarb after Nisumaa et al. (2010) *
22Aragonite saturation state *Omega ArgNisumaa, Anne-Marin *Calculated using seacarb after Nisumaa et al. (2010) *
23Calcite saturation state *Omega CalNisumaa, Anne-Marin *Calculated using seacarb after Nisumaa et al. (2010) *
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