SW06 MSEAS Reanalysis - May 7, 2013

Pierre F.J. Lermusiaux, Patrick J. Haley, Jr., Wayne G. Leslie, Chris Mirabito

100 Levels - /projects/awacs/PE/2013/May07/AW20

This reanalysis is the output of a 42 day-long nested, data-assimilative dynamical model simulation carried out using the MSEAS system for the 2006 AWACS-SW06 exercise in the Middle Atlantic Bight Region over the time period 14 August - 25 September, 2006. This re-analysis is a free surface simulation employing two-way implicit nesting with tidal and atmospheric forcing. In situ observations from Rutgers SeaGliders, NMFS cruises, CTD casts collected aboard the research vessels Knorr, Quest and Tioga, as well as Scanfish data are used to create the initial conditions and for assimilation. SST is also assimilated on Aug 14, 17, 19, 21, 23, 25.

Mooring data are purposely not assimilated in these re-analyses simulations so that they can be utilized as independent data for the evaluation of the simulations.

A major improvement of this latest re-analysis are the updated model initial and boundary conditions. This was achieved through the inclusion of additional synoptic data (WODB, GTSPP) and pseudo profiles to bolster the shelf-break front; correcting the WOA climatology for the slope to match the 2006 conditions; better defining the shelfbreak T/S front FM (steepness and location of foot); improving the Gulf Stream T/S FM based on synoptic data; and, utilizing transport feature models for the Gulf Stream, slope recirculation gyre and shelfbreak front. Data processing of the data was also improved (extending shallow profiles to the surface; improved deep WOA climatology; corrected SST). The time dependent boundary conditions were also updated to permit better radiation of outgoing waves.

Overall, the improvements include: improved initial and boundary conditions and feature models (FM) (see above); the vertical discretization (which now consists of 100 optimized vertical levels); atmospheric forcing with improved E-P and direct fluxes from WRF/NOGAPS, including improved melding between WRF & NOGAPS; updated OTIS tidal forcing; data assimilation which is weaker and more frequent with shorter space scales; and model parameters of vertical mixing (wind mixing, PP background mixing), horizontal mixing and bottom friction which have been better fit to data.

WRF, NOGAPS and COAMPS data sets were carefully compared and evaluated; flux by flux and field by field. Among these, we then selected the most appropriate combination of fields to create our best estimates of the atmospheric forcing (available for whole IODA team). The final product is a combination of WRF and NOGAPS fluxes. Available data was collected and examined for use in the reanalysis initial conditions and assimilation and in the evaluation of the multitude of individual simulations (around 1000 simulations were inter-compared).

Model output in netCDF format


SW06 Domain

AW06 Domain


Plots of Model Fields
Across-Shelf T Across-Shelf S Along-Shelf T Along-Shelf S
1m Temperature 40m Temperature 1m Salinity 40m Salinity
Temperature Time-Series Salinity Time-Series Sigma-Theta Time-Series Zonal Velocity Time-Series
Meridional Velocity Time-Series      
Plots of Model-Data Comparisons
Scanfish Temperature Scanfish Salinity Mooring Velocity

Model Fields
Across-Shelf Temperature
26 Aug 30 Aug 06 Sep 15 Sep
csec_Tacross_0826.gif csec_Tacross_0830.gif csec_Tacross_0906.gif csec_Tacross_0915.gif
Across-Shelf Salinity
26 Aug 30 Aug 06 Sep 15 Sep
csec_Sacross_0826.gif csec_Sacross_0830.gif csec_Sacross_0906.gif csec_Sacross_0915.gif
Along-Shelf Temperature
26 Aug 30 Aug 06 Sep 15 Sep
csec_Talong_0826.gif csec_Talong_0830.gif csec_Talong_0906.gif csec_Talong_0915.gif
Along-Shelf Salinity
26 Aug 30 Aug 06 Sep 15 Sep
csec_Salong_0826.gif csec_Salong_0830.gif csec_Salong_0906.gif csec_Salong_0915.gif
1m Temperature
26 Aug 30 Aug 06 Sep 15 Sep
ccnt_T000_0826.gif ccnt_T000_0830.gif ccnt_T000_0906.gif ccnt_T000_0915.gif
40m Temperature
26 Aug 30 Aug 06 Sep 15 Sep
ccnt_T040_0826.gif ccnt_T040_0830.gif ccnt_T040_0906.gif ccnt_T040_0915.gif
1m Salinity
26 Aug 30 Aug 06 Sep 15 Sep
ccnt_S000_0826.gif ccnt_S000_0830.gif ccnt_S000_0906.gif ccnt_S000_0915.gif
40m Salinity
26 Aug 30 Aug 06 Sep 15 Sep
ccnt_S040_0826.gif ccnt_S040_0830.gif ccnt_S040_0906.gif ccnt_S040_0915.gif
Time-series of model results at mooring location
Temperature
Mooring 29 Mooring 30 Mooring 35 Mooring 43
T29_100L.png T30_100L.png T35_100L.png T43_100L.png
Salinity
Mooring 29 Mooring 30 Mooring 35 Mooring 43
S29_100L.png S30_100L.png S35_100L.png S43_100L.png
Sigma-Theta
Mooring 29 Mooring 30 Mooring 35 Mooring 43
SigTh29_100L.png SigTh30_100L.png SigTh35_100L.png SigTh43_100L.png
Zonal Velocity
Mooring 29 Mooring 30 Mooring 35 Mooring 43
u29_100L.png u30_100L.png u35_100L.png u43_100L.png
Meridional Velocity
Mooring 29 Mooring 30 Mooring 35 Mooring 43
v29_100L.png v30_100L.png v35_100L.png v43_100L.png

Model-Data Comparisons
Difference fields are "model" - "data"
Temperature
Scanfish Survey 1 (1 day forecast)
Observed T Model T T Difference T Error
tempseasoarsurvey1_assim.png tempmodelseasoarsurvey1_assim.png tempdiffseasoarsurvey1_assim.png temperrseasoarsurvey1_assim.png
Scanfish Survey 2 (2 day forecast)
Observed T Model T T Difference T Error
tempseasoarsurvey2_assim.png tempmodelseasoarsurvey2_assim.png tempdiffseasoarsurvey2_assim.png temperrseasoarsurvey2_assim.png
Scanfish Survey 3 (3 day forecast)
Observed T Model T T Difference T Error
tempseasoarsurvey3_assim.png tempmodelseasoarsurvey3_assim.png tempdiffseasoarsurvey3_assim.png temperrseasoarsurvey3_assim.png
Scanfish Survey 4 (4 day forecast)
Observed T Model T T Difference T Error
tempseasoarsurvey4_assim.png tempmodelseasoarsurvey4_assim.png tempdiffseasoarsurvey4_assim.png temperrseasoarsurvey4_assim.png
Scanfish Survey 5 (5 day forecast)
Observed T Model T T Difference T Error
tempseasoarsurvey5_assim.png tempmodelseasoarsurvey5_assim.png tempdiffseasoarsurvey5_assim.png temperrseasoarsurvey5_assim.png
Scanfish Survey 6 (6 day forecast)
Observed T Model T T Difference T Error
tempseasoarsurvey6_assim.png tempmodelseasoarsurvey6_assim.png tempdiffseasoarsurvey6_assim.png temperrseasoarsurvey6_assim.png
Scanfish Survey 7 (1 day forecast)
Observed T Model T T Difference T Error
tempseasoarsurvey7_assim.png tempmodelseasoarsurvey7_assim.png tempdiffseasoarsurvey7_assim.png temperrseasoarsurvey7_assim.png
Scanfish Survey 8 (2 day forecast)
Observed T Model T T Difference T Error
tempseasoarsurvey8_assim.png tempmodelseasoarsurvey8_assim.png tempdiffseasoarsurvey8_assim.png temperrseasoarsurvey8_assim.png
Scanfish Survey 9 (3 day forecast)
Observed T Model T T Difference T Error
tempseasoarsurvey9_assim.png tempmodelseasoarsurvey9_assim.png tempdiffseasoarsurvey9_assim.png temperrseasoarsurvey9_assim.png
Scanfish Survey 10 (4 day forecast)
Observed T Model T T Difference T Error
tempseasoarsurvey10_assim.png tempmodelseasoarsurvey10_assim.png tempdiffseasoarsurvey10_assim.png temperrseasoarsurvey10_assim.png
Scanfish Survey 11 (5 day forecast)
Observed T Model T T Difference T Error
tempseasoarsurvey11_assim.png tempmodelseasoarsurvey11_assim.png tempdiffseasoarsurvey11_assim.png temperrseasoarsurvey11_assim.png
Scanfish Survey 12 (6 day forecast)
Observed T Model T T Difference T Error
tempseasoarsurvey12_assim.png tempmodelseasoarsurvey12_assim.png tempdiffseasoarsurvey12_assim.png temperrseasoarsurvey12_assim.png
Salinity
Scanfish Survey 1 (1 day forecast)
Observed S Model S S Difference S error
saltseasoarsurvey1_assim.png saltmodelseasoarsurvey1_assim.png saltdiffseasoarsurvey1_assim.png salterrseasoarsurvey1_assim.png
Scanfish Survey 2 (2 day forecast)
Observed S Model S S Difference S error
saltseasoarsurvey2_assim.png saltmodelseasoarsurvey2_assim.png saltdiffseasoarsurvey2_assim.png salterrseasoarsurvey2_assim.png
Scanfish Survey 3 (3 day forecast)
Observed S Model S S Difference S error
saltseasoarsurvey3_assim.png saltmodelseasoarsurvey3_assim.png saltdiffseasoarsurvey3_assim.png salterrseasoarsurvey3_assim.png
Scanfish Survey 4 (4 day forecast)
Observed S Model S S Difference S error
saltseasoarsurvey4_assim.png saltmodelseasoarsurvey4_assim.png saltdiffseasoarsurvey4_assim.png salterrseasoarsurvey4_assim.png
Scanfish Survey 5 (5 day forecast)
Observed S Model S S Difference S error
saltseasoarsurvey5_assim.png saltmodelseasoarsurvey5_assim.png saltdiffseasoarsurvey5_assim.png salterrseasoarsurvey5_assim.png
Scanfish Survey 6 (6 day forecast)
Observed S Model S S Difference S Error
saltseasoarsurvey6_assim.png saltmodelseasoarsurvey6_assim.png saltdiffseasoarsurvey6_assim.png salterrseasoarsurvey6_assim.png
Scanfish Survey 7 (1 day forecast)
Observed S Model S S Difference S Error
saltseasoarsurvey7_assim.png saltmodelseasoarsurvey7_assim.png saltdiffseasoarsurvey7_assim.png salterrseasoarsurvey7_assim.png
Scanfish Survey 8 (2 day forecast)
Observed S Model S S Difference S Error
saltseasoarsurvey8_assim.png saltmodelseasoarsurvey8_assim.png saltdiffseasoarsurvey8_assim.png salterrseasoarsurvey8_assim.png
Scanfish Survey 9 (3 day forecast)
Observed S Model S S Difference S error
saltseasoarsurvey9_assim.png saltmodelseasoarsurvey9_assim.png saltdiffseasoarsurvey9_assim.png salterrseasoarsurvey9_assim.png
Scanfish Survey 10 (4 day forecast)
Observed S Model S S Difference S error
saltseasoarsurvey10_assim.png saltmodelseasoarsurvey10_assim.png saltdiffseasoarsurvey10_assim.png salterrseasoarsurvey10_assim.png
Scanfish Survey 11 (5 day forecast)
Observed S Model S S Difference S error
saltseasoarsurvey11_assim.png saltmodelseasoarsurvey11_assim.png saltdiffseasoarsurvey11_assim.png salterrseasoarsurvey11_assim.png
Scanfish Survey 12 (6 day forecast)
Observed S Model S S Difference S error
saltseasoarsurvey12_assim.png saltmodelseasoarsurvey12_assim.png saltdiffseasoarsurvey12_assim.png salterrseasoarsurvey12_assim.png
Mooring Velocity
8m 68m
U V U V
u_sw30_awacs_aw20_z8m.png v_sw30_awacs_aw20_z8m.png u_sw30_awacs_aw20_z68m.png v_sw30_awacs_aw20_z68m.png