Readme.txt -- ~dmenemen/llc_2160/regions/global


This folder generally contains daily averages for llc_2160 output.  Averages are performed on llc_2160 output by averaging 24 hourly files with a boxcar filter (simple averaging). These files are then saved in the corresponding folder, labeled according to variable name. Averages are made daily, not hourly.

Folders labeled as: VARNAME_daily refer to daily averages of VARNAME. 
Folders labeled as: VARNAME_mnsq_daily refer to daily mean square values for VARNAME.
Folders labeled as: VARNAME_daily_MAX refer to daily maximum values for VARNAME.

Only two variables were computed (as opposed to just averaging): U_oceTAUX and V_oceTAUY. These are the daily average kinetic energy fluxes, computed as <U*oceTAUX> and <V*oceTAUY>.

Files are stored in the same format as the original hourly output files. Individual files are identified by their variable name, followed by binary file dimensions, followed by a date stamp. The date stamp used for labeling corresponds to the first hourly data file used for averaging in that 24 hour window. To generate file names for reading, use MATLAB commands:

nx = 2160;
for ts = 92160:(80*24):1586400

      dy = ts2dte(ts,45,2011,1,17,30);
fname = ['~dmenemen/llc_2160/regions/global/VARNAME/' 'VARNAME_daily_' int2str(nx) 'x' int2str(nx*13) '.' dy]

      % Read function
end

Note that some files will be missing due to corruption. If any hour in the averaging window is corrupted, then no file will be saved for that date stamp. Missing files largely occur in U, V, oceTAUX, and oceTAUY.

Because the files are not edited in any way (besides averaging), faces 3, 4, and 5 must be rotated into correct orientation. With this operation, vectors must be correctly oriented. For this reason, the reading function varies depending on the variable being read. For full field (global) with a pcolor-like output format, quikreadpcolor functions work. For sectional reading, the main readme.txt file for 2160 files has examples. (~dmenemen/llc_2160/readme.txt)

For simple magnitude variables (such as Eta), quikreadpcolor_llc.m may be used.
For vector variables (U, oceTAUX), quikreadpcolor_uv_llc.m may be used. 
For reading power variables, quikreadpcolor_upvp_llc.m may be used.

These reading functions are located in ~dmenemen/llc_4320/regions/global/Code.

Also contained in this folder is a link to daily averages computed using a 30h Low Pass Hamming filter. These files can be used in the same way as the simple daily averages. There are, however, fewer variables available with the Hamming filter.
~dmenemen/llc_2160/regions/global/dailyHammingFiltered

Sea Surface Height data (Eta) contained in the daily Hamming averages folder has had sea ice removed, unlike the basic daily averages. This is denoted by 'noIce' or 'iceRemoved'

Variables not contained in the original llc_2160 data set are currently being computed and are likely to change periodically.

Vg_power: V component of geostrophic KE flux.
Ug_ power: U component of geostrophic KE flux.
Uek_power: U component of Ekman generated KE flux.
Vek_power: V component of Ekman generated KE flux.

Uek: U component of Ekman currents
Vek: V component of Ekman currents
Vg: V component of geostrophic currents
Ug: U component of geostrophic currents
Uag: U component of ageostrophic currents, computed as (U_total-Ug)
Vag: V component of ageostrophic currents, computed as (V_totla-Vg)