1 / 14

Barneo 2008 - MSS

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.

inga
Download Presentation

Barneo 2008 - MSS

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Barneo 2008 - MSS Lomonosov Ridge profiles First, some basic plots:

  2. 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

  3. TS diagram

  4. TS contourplot

  5. TS contourplot upper 100m

  6. Density and dissipation

  7. Density and dissipation, upper 100m Update: Discovered that

  8. Heat fluxes: • Modifying Make_HeatFlux_Cox_4m_2008rev.m to be similar to the 2007 version. • Updating the cast list to exclude yo-yo profiles. Also, cast 98 and 213 failed due to bad spectre, so I excluded those as well. Fix later. 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

  9. Profiles heat flux, all profiles. Cast 4 showed very large negative fluxes around 270m and is not included. • There is a lack of values in the upper mixed layer, check out why… • Seems like a threshold for absolute value of the temp gradient (larger than 1·10-3) excludes a lot of segments in the upper mixed layer. Should be ok down to here Right below temp maxima

  10. Looking at the KT based heat flux: 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…

  11. Depth of mixed layer and pycnocline 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…

  12. Upper levels of thermocline and halocline, used later to find heat fluxes across the cold halocline layer.

  13. Heat fluxes in mixed layer and upper pycnocline 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…

  14. Looking at double diffusive staircases and resulting heat flux 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.

More Related