Dataset: Noble gas global observations used in the ECCO noble gas model and simulations decomposed to isolate bubble-mediated gas exchange (Noble gas modeling project)

Final no updates expectedVersion (2017-01-23)Dataset Type:Cruise Results

Principal Investigator: David P. Nicholson (Woods Hole Oceanographic Institution)

Co-Principal Investigator: Samar Khatiwala (University of Oxford)

Co-Principal Investigator: Rachel Stanley (Woods Hole Oceanographic Institution)

BCO-DMO Data Manager: Nancy Copley (Woods Hole Oceanographic Institution)


Project: An Inverse and Forward Global Modeling Synthesis of Noble Gases to Better Quantify Biogeochemical Cycles (Noble gas modeling)

This dataset includes:
1) noble gas observations used in the ECCO noble gas model. They were collected globally at sea and were analyzed by mass spectrometry.
(2) model simulations decomposed to isolate bubble-mediated gas exchange.

Noble Gas Observations:
The observation data is provided in MATLAB format: noblegasDB.mat (download here) (size = 94 KB)
The variables are a MATLAB table ‘NGall’ and a list of original references ‘NGprojects’
The served data is provided in jgofs format with the columns slightly rearranged for database best practices.

Global Model Simulations:

The simulation file is provided in MATLAB format: ECCOv2_NobleGases.mat (download here) (size = 1 GB)

Noble gases and nitrogen were simulated in the Estimating the Circulation & Climate of the Ocean (ECCO) global ocean state estimate utilizing a matrix-free Newton–Krylov (MFNK) scheme to efficiently compute the periodic seasonal solutions for noble gas tracers.

Original simulations:
sim1 = diffusive gas exchange only
sim2 = diffusive gas exchange and bubble injection
sim3 = diffusive gas exchange and bubble exchange

DG = sim1
IG = sim2-sim1
EG = sim3-sim1

For each gas ‘G’ total gas concentration is calculated as Gsol(S,T) * (AG + BG + CG)

DG is results of the simulation with no bubbles, while IG and EG are the isolated contribution from bubble injection and bubble exchange, respectively.


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Hamme, R. C. (2003), Applications of neon, nitrogen, argon and oxygen to physical, chemical and biological cycles in the ocean, Ph.D., University of Washington, Seattle, WA.
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Hamme, R. C., & Emerson, S. R. (2013). Deep-sea nutrient loss inferred from the marine dissolved N2/Ar ratio. Geophysical Research Letters, 40(6), 1149–1153. doi:10.1002/grl.50275
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Hamme, R. C., & Severinghaus, J. P. (2007). Trace gas disequilibria during deep-water formation. Deep Sea Research Part I: Oceanographic Research Papers, 54(6), 939–950. doi:10.1016/j.dsr.2007.03.008
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Loose, B., & Jenkins, W. J. (2014). The five stable noble gases are sensitive unambiguous tracers of glacial meltwater. Geophysical Research Letters, 41(8), 2835–2841. doi:10.1002/2013gl058804
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Nicholson, D. P., Khatiwala, S., & Heimbach, P. (2016). Noble gas tracers of ventilation during deep-water formation in the Weddell Sea. IOP Conference Series: Earth and Environmental Science, 35, 012019. doi:10.1088/1755-1315/35/1/012019