Transport times and anthropogenic carbon in the subpolar North Atlantic Ocean

Waugh, Darryn W.; Haine, Thomas W. N.; Hall, Tim

doi:10.1016/j.dsr.2004.06.011

Cited by 140 publications

(195 citation statements)

References 54 publications

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“…[9] The TTD is approximated by an inverse Gaussian distribution [Hall et al, 2002;Waugh et al, 2004Waugh et al, , 2006 …”

Section: Ttd Methodsmentioning

confidence: 99%

“…Tracer concentrations in themselves could have been compared in order to remove the effect of the nonlinear relationship between concentration and age that is typical for many tracers. However, this approach did not provide any additional information, and we chose to compare the ages to enable direct comparison of our results with those of Waugh et al [2004].…”

Section: Determination Of Ttd Parametersmentioning

confidence: 99%

“…[11] To constrain D/G for the Nordic seas we follow the approach of Waugh et al [2004], i.e., by comparing the relationship between tracer ages. Tracer concentrations in themselves could have been compared in order to remove the effect of the nonlinear relationship between concentration and age that is typical for many tracers.…”

Section: Determination Of Ttd Parametersmentioning

confidence: 99%

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Nordic seas transit time distributions and anthropogenic CO₂

et al. 2010

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[1] The distribution and inventory of anthropogenic carbon (DIC ant ) in the Nordic seas are determined using the transit time distribution (TTD) approach. To constrain the shape of the TTDs in the Nordic seas, CO 2 is introduced as an age tracer and used in combination with water age estimates determined from CFC-12 data. CO 2 and CFC-12 tracer ages constitute a very powerful pair for constraining the shape of TTDs. The highest concentrations of DIC ant appear in the warm and well-ventilated Atlantic water that flows into the region from the south, and concentrations are typically lower moving west into the colder Arctic surface waters. The depth distribution of DIC ant reflects the extent of ventilation in the different areas. The Nordic seas DIC ant inventory for 2002 was constrained to between 0.9 and 1.4 Gt DIC ant , corresponding to ∼1% of the global ocean DIC ant inventory. The TTD-derived DIC ant estimates were compared with estimates derived using four other approaches, revealing significant differences with respect to the TTD-derived estimates, which can be related to issues with some of the underlying assumptions of these other approaches. Specifically, the Tracer combining Oxygen, inorganic Carbon and total Alkalinity (TrOCA) method appears to underestimate DIC ant in the Nordic seas, the DC* shortcut and the approach of Jutterström et al. (2008) appear to overestimate DIC ant at most depths in this area, and finally the approach of Tanhua et al. (2007) appears to underestimate Nordic seas DIC ant below 3000 m and overestimate it above 1000 m.

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“…[9] The TTD is approximated by an inverse Gaussian distribution [Hall et al, 2002;Waugh et al, 2004Waugh et al, , 2006 …”

Section: Ttd Methodsmentioning

confidence: 99%

Section: Determination Of Ttd Parametersmentioning

confidence: 99%

Section: Determination Of Ttd Parametersmentioning

confidence: 99%

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Nordic seas transit time distributions and anthropogenic CO₂

et al. 2010

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“…Recent progress on understanding and diagnosing tracer transport has come from considering transit-time distributions (TTDs; see, for example, Holzer and Hall, 2000, Haine and Hall, 2002, Waugh et al, 2004. The advantage of thinking about transport using TTDs is that one focuses on a revealing diagnostic that is independent of the specific source/sink characteristics of any particular tracer.…”

Section: Introductionmentioning

confidence: 99%

On transit-time distributions in unsteady circulation models

et al. 2008

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“…Many are still based on the initial work of the late 1970s with various improvements (e.g., ΔC* approach of Gruber et al [1996]; Pérez et al [2002]; and LM approach of Lo Mo naco et al [2005a]). Others use completely new concepts such as water mass mixing [Goyet et al, 1999], similarity with CFCs or SF 6 penetration [e.g., Goyet and Brewer, 1993], the transit time distribution (TTD) approach of Waugh et al [2004Waugh et al [ , 2006 and Tanhua et al [2008], or a new water mass tracer "TrOCA" Goyet, 2004a, 2004b;Touratier et al, 2007].…”

Section: Distribution Of Anthropogenic Carbon In the Indian Oceanmentioning

confidence: 99%