2014
DOI: 10.5194/bg-11-365-2014
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Calcium carbonate corrosivity in an Alaskan inland sea

Abstract: Abstract. Ocean acidification is the hydrogen ion increase caused by the oceanic uptake of anthropogenic CO 2 , and is a focal point in marine biogeochemistry, in part, because this chemical reaction reduces calcium carbonate (CaCO 3 ) saturation states ( ) to levels that are corrosive (i.e., ≤ 1) to shell-forming marine organisms. However, other processes can drive CaCO 3 corrosivity; specifically, the addition of tidewater glacial melt. Carbonate system data collected in May and September from 2009 through 2… Show more

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Cited by 73 publications
(98 citation statements)
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References 67 publications
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“…This mechanism could hence constitute an important driver for undersaturation in CO 2 when large amounts of meltwater are discharged into the fjord, so that salinity levels are sufficiently reduced. The undersaturation in CO 2 that has been previously observed in other high-latitude systems (Evans et al, 2014;Sejr et al, 2011;Torres et al, 2011) could possibly be explained by this same mechanism, since these systems also show the signature of a large input of glacial meltwater, leading to a strong reduction in salinity. In Godthåbsfjord, undersaturation in CO 2 is strongest during the summer months, when large volumes of meltwater are mixed with fjord water and salinity in surface layer drops to ∼ 8 (which coincides with the maximum undersaturation observed in Fig.…”
Section: Effect Of Glacial Melt On the Carbon Dynamicssupporting
confidence: 59%
See 1 more Smart Citation
“…This mechanism could hence constitute an important driver for undersaturation in CO 2 when large amounts of meltwater are discharged into the fjord, so that salinity levels are sufficiently reduced. The undersaturation in CO 2 that has been previously observed in other high-latitude systems (Evans et al, 2014;Sejr et al, 2011;Torres et al, 2011) could possibly be explained by this same mechanism, since these systems also show the signature of a large input of glacial meltwater, leading to a strong reduction in salinity. In Godthåbsfjord, undersaturation in CO 2 is strongest during the summer months, when large volumes of meltwater are mixed with fjord water and salinity in surface layer drops to ∼ 8 (which coincides with the maximum undersaturation observed in Fig.…”
Section: Effect Of Glacial Melt On the Carbon Dynamicssupporting
confidence: 59%
“…Up to now only a few studies have investigated the CO 2 uptake in Arctic fjord systems impacted by glacial meltwater input (Evans et al, 2014;Rysgaard et al, 2012;Sejr et al, 2011). All these studies report substantial CO 2 undersaturation in the surface water.…”
Section: Introductionmentioning
confidence: 99%
“…High latitude marine ecosystems are also particularly vulnerable to ocean acidification (Orr, 2011). Due to naturally lower carbonate ion concentrations [CO 3 2-] and accelerated decrease of [CO 3 2-] as a result of sea ice and glacial melt (Yamamoto-Kawai et al, 2009;Evans et al, 2014), these regions are quickly being pushed closer or past biologically important thresholds. Already today, the consequences of these anthropogenic changes are visible in the marine ecosystem and manifest themselves as species range shifts, changes in 15 abundance, growth, condition, behaviour and phenology, and community and regime shifts (Wassmann et al, 2011).…”
Section: The Gateway To the Arctic Oceanmentioning
confidence: 99%
“…The sinking of carbon is one of the leading components of the carbon cycle and global climate system [44]. The excessive saturation of water with CaCO3 gives on adverse biogeochemical effect [30]. It is important to quantify the carbon source/sink nature, determine its drivers [105].…”
Section: Introductionmentioning
confidence: 99%