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(MIxed Layer data set of Argo, Grid Point Value)

JAMSTEC produces a data set of gridded mixed layer depth with its related parameters,
named MILA GPV (MIxed Layer data set of Argo, Grid Point Value).
MILA GPV consists of 10-day and monthly average data from January 2001 and monthly climatology data
in the global ocean using Argo temperature and salinity profiles.

2015/09/07 [Note] We had debugged MLD calculation program and re-calculated the data from 1st January, 2001 to 31st July,

                              2015 based on Argo profile data downloaded in 1st August, 2015 from GDAC. By this re-calculation,
                              error of MLD values with shallower than 10-dbar had been fixed, which were impossible ones according
                              to the definition of MLDs. After August 2015 MLD Data are calculated by the debugged program.

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  • Paramaters
  • Mixed layer depth is defined using a finite difference method based on temperature and σθ at 10 dbar. Two pairs of the difference criteria are used such as (Δσθ=0.03kg/m3 and ΔT=0.2°C) and (Δσθ =0.125kg/m3 and ΔT=0.5°C). The mixed layer depth is estimated from a minimum thickness of either Δσθ or ΔT. Isothermal layer thickness and isopycnal thickness are estimated using two criteria, respectively. Producing parameters of mixed layer depth, isothermal layer thickness and isopycnal layer thickness are listed below.

    1. Mixed Layer Properties (depth definition : shallower thickness, either Δσθ=0.03kg/m3 or ΔT=0.2°C)
    2. Mixed Layer Properties (depth definition : shallower thickness, either Δσθ=0.125kg/m3 or ΔT=0.5°C)
    3. Isothermal Layer Properties (thickness definition : ΔT=0.2°C)
    4. Isopycnal Layer Properties (thickness definition : Δσθ=0.03kg/m3)
    5. Isothermal Layer Properties (thickness definition : ΔT=0.5°C)
    6. Isopycnal Layer Properties (thickness definition : Δσθ=0.125kg/m3)

  • Note
    • Reprint without permission, the re-distribution, the modification, and the commercial use are prohibited though JAMSTEC doesn't disturb the free use of this data in principle.
    • Please source the above when you make the result using this data public.
    • JAMSTEC doesn't assume the responsibility to any damage of the user of this data.

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