Barneo 2008 - MSS. Lomonosov Ridge profiles. First, some basic plots:. Mean profiles. Hmm, salinity stratified mixed layer… Seems like the mean profile does not give a good picture of the mixed layer properties, especially regarding salinity. TS diagram. TS contourplot.
Lomonosov Ridge profiles
First, some basic plots:
Hmm, salinity stratified mixed layer… Seems like the mean profile does not give a good picture of the mixed layer properties, especially regarding salinity
Update: Discovered that
Mean stratification, 4 m averages, shows that Krho estimates should be ok above ~260 m.
Threshold for “low stratification”, 1.7·10-3 s-1 (Fer, 2009), or 1 cycle/hour
Profiles heat flux, all profiles. Cast 4 showed very large negative fluxes around 270m and is not included.
Should be ok down to here
Right below temp maxima
Blue line is mean FHCox, except yoyo and cast 4 and 213.
Dashed lines indicate the 95 % confidence interval
Need to look closer at the different layers…
Dml is found using the Thomson and Fine routine, Dpyc is found as depth of maximum N2
Mean Dml = 30 m
Mean Dpyc = 84 m
Sometimes N2 has a secondary maximum in the pycnocline which is slightly larger than the first…
Upper levels of thermocline and halocline, used later to find heat fluxes across the cold halocline layer.
Mean values and 95% confidence intervals:
Fh,ml = 0.03 [-0.15 0.21] Wm-2
Fh,pyc = -0.01 [-0.04 0.02] Wm-2
Fhchl = -0.03 [-0.05 -0.01] Wm-2
No significant heat fluxes…
Rewriting Ilker’s routine and use a method based on Padman and Dillon (1987), where all the thermohaline staircases are detected from a given treshold and fluxes determined
To the right are the average result for all profiles (except yo-yos and Lomonosov) where thermohaline staircases are determined in the range 200 – 450 m and averaged in 10 m bins.
Seems like most important depths are 200 - 260 and 290 – 310m. Average fluxes reaching 2 Wm-2 at 225 m.