Iodine-129,<sup>137</sup>Cs, and CFC-11 tracer transit time distributions in the Arctic Ocean

Smith, J. N.; McLaughlin, Fiona A.; Smethie, William M.; Moran, S. Bradley; Lepore, Kate

doi:10.1029/2010jc006471

Cited by 88 publications

(189 citation statements)

References 47 publications

(103 reference statements)

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“…These three production components produce a wide range of 129 I/ 127 I ratios in environmental samples spanning from below 10 À14 to well above 10 À9 , in extreme cases up to 10 À6 [6]. Applications of 129 I range from use as a dating tool [3,7] to retrospective dosimetry of 131 I after nuclear accidents [8,9] and environmental studies [10] to the use as an oceanic tracer [4,11].…”

Section: Introductionmentioning

confidence: 99%

Accelerator Mass Spectrometry of 129I towards its lower limits

Vockenhuber

Casacuberta

Christl

et al. 2015

Nuclear Instruments and Methods in Physics Research Section B:

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Section: Introductionmentioning

confidence: 99%

Accelerator Mass Spectrometry of 129I towards its lower limits

Vockenhuber

Casacuberta

Christl

et al. 2015

Nuclear Instruments and Methods in Physics Research Section B:

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“…The lighter variants of this Atlantic-derived water, with admixtures of river runoff and modified by sea ice melt/freeze [Rudels et al, 2004] feeds the surface waters in the Eurasian Basin. It recirculates to Fram Strait with the Transpolar Drift (TPD) on timescales up to a decade [Schlosser et al, 1995;Smith et al, 2011]. The denser fraction of the Atlanticderived water enters the Nansen Basin as Barents Sea Branch Water (BSBW) through the St. Anna Trough where it encounters and undergoes limited mixing with FSBW.…”

Section: Introductionmentioning

confidence: 99%

Recent changes in Arctic Ocean circulation revealed by iodine‐129 observations and modeling

et al. 2012

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Anthropogenic radionuclides released into European coastal waters from nuclear fuel reprocessing plants at Sellafield (UK) and La Hague (France) flow northward through the Nordic Seas and label Atlantic Water (AW) entering the Arctic Ocean. Transport of the soluble radionuclide 129I through the Arctic Ocean has been simulated using a numerical model for the period from 1970 to 2010. The simulated tracer distributions closely conform to 129I measurements made across the Arctic Ocean during the mid‐1990s and 2000s and clearly illustrate the dramatic changes in oceanic circulation which occurred during this time. The largest changes in surface circulation were associated with the transition from a negative to a positive phase of the Arctic Oscillation in the early 1990s and the subsequent return to a weak positive phase in the late 1990s and early 2000s. Model and experimental results indicate that a new circulation regime evolved after 2004 when a period of intense, anti‐cyclonic surface stress led to a strengthening of the Beaufort Gyre. We submit that this resulted in a suppression of the cyclonic boundary current of mid‐depth Atlantic Water (AW) below the Beaufort Gyre, with upper AW in the Canada Basin showing signs of a reversal from cyclonic to anti‐cyclonic flow. These results are consistent with the development of a new AW circulation scheme involving a separation between flow at intermediate depths in the Eurasian and Canada Basins which could eventually result in modification of the Arctic intermediate water which feeds the overflows.

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“…In periods when wind exports large amounts of ice out of the Barents Sea, the salinity of the water increases, and vice versa (Ellingsen et al 2009). The 5-yr lag corresponds to an ;5-yr transit time for the Atlantic-origin water between the Barents and Laptev Seas on the basis of tracer analysis (Frank et al 1998;Smith et al 2011). Note that the time lagging outside 5 6 1 yr exhibits no correlations.…”

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confidence: 99%

Modified Halocline Water over the Laptev Sea Continental Margin: Historical Data Analysis

et al. 2012

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Historical hydrographic data (1940s-2010) show a distinct cross-slope difference of the lower halocline water (LHW) over the Laptev Sea continental margins. Over the slope, the LHW is on average warmer and saltier by 0.28C and 0.5 psu, respectively, relative to the off-slope LHW. The LHW temperature time series constructed from the on-slope historical records are related to the temperature of the Atlantic Water (AW) boundary current transporting warm water from the North Atlantic Ocean. In contrast, the on-slope LHW salinity is linked to the sea ice and wind forcing over the potential upstream source region in the Barents and northern Kara Seas, as also indicated by hydrodynamic model results. Over the Laptev Sea continental margin, saltier LHW favors weaker salinity stratification that, in turn, contributes to enhanced vertical mixing with underlying AW.

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Iodine-129,¹³⁷Cs, and CFC-11 tracer transit time distributions in the Arctic Ocean

Cited by 88 publications

References 47 publications

Accelerator Mass Spectrometry of 129I towards its lower limits

Accelerator Mass Spectrometry of 129I towards its lower limits

Recent changes in Arctic Ocean circulation revealed by iodine‐129 observations and modeling

Modified Halocline Water over the Laptev Sea Continental Margin: Historical Data Analysis

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Iodine-129,137Cs, and CFC-11 tracer transit time distributions in the Arctic Ocean

Cited by 88 publications

References 47 publications

Accelerator Mass Spectrometry of 129I towards its lower limits

Accelerator Mass Spectrometry of 129I towards its lower limits

Recent changes in Arctic Ocean circulation revealed by iodine‐129 observations and modeling

Modified Halocline Water over the Laptev Sea Continental Margin: Historical Data Analysis

Contact Info

Product

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Iodine-129,¹³⁷Cs, and CFC-11 tracer transit time distributions in the Arctic Ocean