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Decorrelation length scales in NEMO ORCA12
Adam Blaker, Elaine McDonagh, Ben Moat, Brian King, Andrew Coward
Current speed at 100m depth
SS
SS
ST
January ClimatologyORCA12 EN3
Marzocchi et al (2014) in prep
Atlantic MOC at 26oN Florida StraitsObs: 31.56 (3.02)O12: 28.57 (1.56)
AMOCObs: 17.47 (4.78)O12: 12.57 (3.72)
EkmanObs: 3.19 (3.32)O12: 2.56 (2.26)
UMOObs: -17.22 (3.47)O12: -18.44 (2.07)
Year
Increased AABW transport
Marzocchi et al (2014) in prep
Winter mixed layer depth
Peak winter MLD in early 1990s
Marzocchi et al (2014) in prep
• T anomalies on neutral density much smaller than on depth levels
• Fine scale features present even at ~2km depth
Typical length scale 500-600km
Gaussfit currently not working for points at/near most extreme T anomalies
Need to check fit behavior in some regions (e.g. here)
~2km
~3km
~4km
• Peak (~500-600km) still present deeper down
• Shortest (100-300km) length scales probably a processing issue (maybe proximity to bathymetry or because T anomalies become very small at depth)
Next steps
•Verify gaussfit behavior
•Explore zonal vs meridional dependence
•Investigate time dependence of length scales
•Extend analysis in deep ocean
•Extend analysis to Global ocean