tutorial_reg

DOWNLOAD

Please download the data HERE (current for regional simulation only)

ver 2007/12/21 M.Satoh NICAM tutorail seminar @CCSR

ver 2009/07/22 M.Satoh NICAM english version

ver 2009/08/02 M.Hara LSM:MATSIRO and initial condition:NCEP FNL data

ver 2009/08/19 C.Kodama regional NICAM -> global NICAM

ver 2009/08/** C.Kodama add split grid (merge M.Hara's tutorial)

ver 2009/09/11 C.Kodama revise for higher rlevel/glevel

ver 2010/04/05 M. Hara reformated for wiki

• Initial condition:
  • 00UTC 1. June 2004 NCEP Final Analysis

• Boundary condition:
  • 1-deg, weekly Reynolds SST/ICE

• Resolution:
  • glevel-5, 40 vertical layers (nicam_gl05_rl00.tar.gz)
  • glevel-10, 40 vertical layers (nicam_gl10_rl05.tar.gz)

Note: mod_adm.f90 PRC_ -> 10240

'''Caution: NICAM is still under construction and it may have some bugs.'''

A. 1 Extraction of test-run kit

You can choice any directory to extract testrun kit

 % mkdir ~/test/
 % cd test

(on Linux)

 % tar xvzf nicam_src_????????.tar.gz
 % tar xvzf NICAM_DATABASE-????????.tar.gz
 % tar xvzf NICAM_DATABASE_global-????????.tar.gz
 % tar xvzf dataset.tar.gz
 % tar xvzf nicam_gl05_rl00.tar.gz   ##(for glevel-05) 
 % tar xvzf nicam_gl10_rl05.tar.gz   ##(for glevel-10)

A. 2 Directory Structure in the test/ directory

NICAM_DATABASE (commonly used datasets)

|-- amip2o3_bin.dat (ozone)

|-- hgrid (horizontal grid)

|-- _hgrid (horizontal grid before mkgcgrid)

|-- radpara (parameter tables for radiation scheme)

|-- rawdata (binary data for land surface and ocean models)

|-- refstate (reference state of atmosphere)

|-- sfcdata (topography for gl05-10 / land data for gl05 )

dataset (original data, e.g. analysis/reanalysis dataset)

|-- fnl (NCEP Final Analysis)

|- iosst_v2 (Reynolds SST)

nicam_gl05_rl00 or nicam_gl10_rl05

|-- external_data (boundary conditions)

| |-- MATSIRO (input data for MATSIRO, ex. orography, vegetation, albedo, lai, soil)

| | `-- check (visualize output data of MATSIRO)

| |-- O3 (3D ozone data)

| | `-- check (visualize output data of O3)

| `-- OCN (ocean data)

| `-- check (visualize output data of OCN)

|-- grid (grid setup)

| |-- hgrid (horizontal grid)

| |-- llmap (table for converting ICO grid to lat-lon grid)

| `-- vgrid (vertical grid)

|-- initial_data (initial conditions)

| |-- ATM (initial data for atmosphere)

| | `-- check (visualize output data of ATM)

| |-- LND (initial data for land)

| | `-- check (visualize output data of LND)

| `-- OCN (initial data for ocean)

| `-- check (visualize output data of OCN)

|-- local (special programs for preperation)

| |-- bin

| `-- src

|-- mnginfo (managing information for regions and processes)

`-- run (directory for NICAM simulation)

NICAM (NICAM source code)

A. 3 Compiling NICAM

A. 3. 1 Configuration of Mkinclude

  % cd NICAM/
  % ln -s Mkinclude.[your_environment] Mkinclude

If you use NICAM on Linux PC, type as follows:

 % ln -s Mkinclude.Linux Mkinclude

Change 'TOPPATH' in Mkinclude. 'TOPPATH' is the directory name which contains the NICAM source code. You can use your favorite editor, e.g., vi, emacs, to edit Mkcinlude.

 % vi Mkinclude.[your_environment]

Hereafter, ${TOPPATH} in this tutorial means TOPPATH in Mkinclude

A. 3. 2 Compiling NICAM

% make >& make.log

After compiling, please check ${TOPPATH}/bin.

% ls bin/
 
  CVS/               ico2ll*            mkinit_CFMIP_LL*     mkllmap*           prelai*
  cnvgfile*          ico2ll_omp_mpi*    mkinit_aero*         mkmnginfo*         presoil*
  cnvlatlon*         ico_calc*          mkinit_atm*          mko3*              relmap*
  cnvlatlon2*        ll2grads*          mkinit_ecmwf_yotc*   mksst*             rlev2rlev*
  cnvlatlon2-2*      ll2ico*            mkinit_gpvgsm*       mkvlayer*          rotategrid*
  cnvlatlon2_merge*  mergeobsd*         mkinit_gpvgsm2*      nhm_driver*        showvlayer*
  cnvvertical*       mergetopo*         mkinit_lnd*          nhm_mkinit*        splitgrid*
  diaggrid*          mkchem*            mkinit_ncep*         nhm_mkrestart*     swm_driver*
  endcnv*            mkemit*            mkinit_ocn*          obsloc2ico*        swm_mkinit*
  grd2ico*           mkgcgrid*          mkkonedata*          offline_driver*    transgrid*
  ico2ico*           mkgisst*           mklanddata*          prealbedo*         zonalmean*
  ico2ico_land*      mkgrid*            mklanddata2*         prebcveget*        zonalwave*

On ES2, when running ${TOPPATH}/bin/*, you must set F_RECLUNIT as environment variable:

 % setenv F_RECLUNIT BYTE

B. 1 Edit mkmnginfo.cnf

   % cd ~/test/nicam_gl05_rl00/mnginfo/
   % vi mkmnginfo.cnf

&MKMNGINFO_CNF

   rlevel       = 0,
   prc_num      = 5,
   output_fname = './data/rl00-prc05.info',

For example, we set "rlevel-0 with 5 processes" above. In mkmnginfo.cnf, " output_fname = 'rl00-prc05.info' " means "rlevel-0 with 5 processes". If you run NICAM with rlevel higher than 0, you must prepare management files for both rlevel 0 and rlevel r (r>0). You'll use rlevel-0 mng file when you increase rlevel.

"prc_num" should be the divisor of the total number of the rombuses. The globe is covered by 10 rhombuses. There are 10 rombuses if rlevel = 0. "prc_num" should be 2, 5, 10. There are 40 rombuses if rlevel = 1. "prc_num" should be 2, 4, 5, 8, 10, 20, 40. There are 160 rombuses if rlevel = 2. "prc_num" should be 2, 4, 5, 8, 10, 20, 40, 80, 160.

B. 2. 3 Run mkmnginfo

 % ${TOPPATH}/bin/mkmnginfo

mkmnginfo should be executed serially. This generates "rl00-prc05.info".

 % ls data/
  
   rl00-prc05.info

Horizontal grid files for glevel-5 rlevel-0 are provided in NICAM_DATABASE/hgrid. Skip section C if you use them. Horizontal grid files in any rlevel between glevel 4-10 can be created using rlevel-0 files in NICAM_DATABASE/_hgrid. Follow Section C. Section C is how to make gl10rl05 horizontal grid files.

C. 1 Splitting grid

If you don't need to increase rlevel, skip subsection C.1.

C. 1. 1 Editing "splitgrid.cnf"

 % cd ~/test/nicam_gl10_rl05/grid/splitgrid/
 % vi splitgrid.cnf

 &ADMPARAM
     glevel = 10,
     rlevel = 0,
     vlayer = 1,
     rgnmngfname='../../mnginfo/data/rl00-prc05.info',    (You must prepare it before.)
   /
  &GRDPARAM
 /
 &SPLITGRIDPARAM
   input_base  = '../../../NICAM_DATABASE/_hgrid/gl10/rl00/grid',
   output_base = 'data/_grid',
   alt_rlevel  = 5,
 /

C. 1. 2 Run splitgrid

  % mpirun -np 5 ${TOPPATH}/bin/splitgrid

splitgrid must be executed with mpirun This creates "_grid.rgn?????" in "data" directory, which are horizontal grid files BEFORE modification necessary for NICAM run.

C. 2 Create SPRING-gc grid

C. 2. 1 Edit "mkgcgrid.cnf"

   % cd ~/test/nicam_gl10_rl05/hgrid/
   % vi mkgcgrid.cnf

 &ADMPARAM
     glevel       = 10,
     rlevel       = 5,
     vlayer       = 1,
     rgnmngfname  = '../../mnginfo/data/rl05-prc05.info',
 /
 &MKGCGRIDPARAM
     input_base     = '../splitgrid/data/_grid',
     output_base    = 'data/grid', 
 /

C. 2. 2 Run

  % mpirun -np 5 ${TOPPATH}/bin/mkgcgrid  ## mkgcgrid must be executed with mpirun

This creates "grid.rgn?????" in "data" directory, which are horizontal grid files used in NICAM.

D. 1 Creating map files.

These files define the relation between icosahedral grids and latitude-longitude grids, and will be used at the postprocess to transform output files into latitude-longitude grid GrADS files.

D. 1. 1 Edit "mkllmap.cnf"

   % cd ~/test/nicam_gl05_rl00/grid/llmap
   % vi mkllmap.cnf

 &ADMPARAM
     glevel      = 5,
     rlevel      = 0,
     vlayer      = 1,
     rgnmngfname = '../../mnginfo/data/rl00-prc05.info',
 /
 &LATLONPARAM
     imax       = 144,
     jmax       = 72,
 /
 &MKLLMAP_PARAM
     output_dir = './data/'
 /
 &GRDPARAM
     hgrid_fname = '../../../NICAM_DATABASE/hgrid/gl05/rl00/grid'
 /

imax and jmax are number of lat-lon grid points where icosahedral data will be interpolated. Using above configure file, you can convert any icosahedral data into lat-lon data, -90<=lat<=90 and 0<=lon<=357.5.

D. 1. 2 Run mkllmap

  % mpirun -np 5 ${TOPPATH}/bin/mkllmap

mkllmap must be executed with mpirun. It will generate llmap.rgn????? in data/ directory.

E. 1 Generating vertical grid

  % cd ~/test/nicam_gl05_rl00/grid/vgrid

E. 1. 1 Prepare vertical levels.

Prepare text files of vertical levels as "vgrid40.txt", which is the standard 40 levels (half-level).

 % vi vgrid40.txt

 0.000000000000000E+000
 161.683000000000
 335.958000000000
 523.806000000000
 726.285000000000
 944.534000000000
 1179.78100000000
 1433.34900000000
 1706.66700000000
 2001.27200000000
 2318.82200000000
 2661.10400000000
 3030.04500000000
 3427.72000000000
 3856.36800000000
 4318.40000000000
 4816.41800000000
 5353.22300000000
 5931.83700000000
 6555.51600000000
 7227.76900000000
 7952.38000000000
 8733.42800000000
 9575.30600000000
 10482.7530000000
 11460.8760000000
 12515.1790000000
 13651.5960000000
 14876.5210000000
 16196.8500000000
 17620.0100000000
 19154.0120000000
 20807.4880000000
 22589.7440000000
 24510.8110000000
 26581.4960000000
 28813.4570000000
 31219.2520000000
 33812.4180000000
 36607.5550000000
 39620.3830000000

E. 1. 2 Edit mkvlayer.cnf

 % vi mkvlayer.cnf

 &MKVLAYER_CNF 
     num_of_layer = 40,
     layer_type   = 'GIVEN',
     infname      = './vgrid40.txt',
     outfname     = './data/vgrid40.dat',
 /

E. 1. 3 Run mkvlayer

 % ${TOPPATH}/bin/mkvlayer

mkvlayer must be executed "without" mpirun. This generates binary file (vgrid40.dat) in data/ directory.

All the MATSIRO files necessary for gl05rl00 run are included in the tutorial packages (NICAM_DATABASE). Therefore, skip section F. Section F describes how to create gl10rl05 MATSIRO files.

F. 1 Generating topography files (topog.rgn?????)

If you run NICAM with gl05rl00, gl06rl00, gl07rl01, gl08rl02, gl09rl03, or gl10rl04, skip subsection F.1 and use topography files provided by us. Followings are example of creating gl10rl05 topography files from gl10rl04 topography files provided by us.

  % cd ~/test/nicam_gl10_rl05/external_data/MATSIRO

F. 1. 1 Edit cnvrlev.cnf

 &ADMPARAM
     glevel      = 10,
     rlevel      = 4,
     vlayer      = 1,
     rgnmngfname = '../../mnginfo/data/rl04-prc05.info',
 /
 &SPLITGRIDPARAM
     num_data      = 1,
     input_base    = '../../../NICAM_DATABASE/sfcdata/gl10/rl04/B/topog2',
     input_direct  = .false.,
     output_base   = 'data/topog',
     output_direct = .false.,
     output_rlevel = 5,
 /

F. 1. 2 Run cnvrlev

  % mpirun -np 5 ${TOPPATH}/bin/cnvrlev

cnvrlev must be executed with mpirun. This generates topog.rgn????? in data/ directory.

F. 2 Generating MATSIRO files

  % cd ~/test/nicam_gl05_rl00/external_data/MATSIRO

F. 2. 1 Edit mklanddata2.cnf.1 & mklanddata2.cnf.2

We need to run "mklanddata2" 2 times. See mklanddata2.cnf.? for details

F. 2. 2 First Run

   % rm -f mklanddata2.cnf
   % ln -s mklanddata2.1.cnf mklanddata2.cnf
   % mpirun -np 5 ${TOPPATH}/bin/mklanddata2

mklanddata2 must be executed with mpirun. Following files will be generated in data/ directory:

     albedo_nir.rgn?????
     albedo_vis.rgn?????
     gradz.rgn?????
     slidx.rgn?????
     topog_not_used.rgn?????   ## not used for NICAM run
     topog_std.rgn?????
     veget_mat.rgn?????

F. 2. 3 Second Run

  % rm -f mklanddata2.cnf
  % ln -s mklanddata2.2.cnf mklanddata2.cnf
  % mpirun -np 5 ${TOPPATH}/bin/mklanddata2

This will generate lai_clm_1982-1998.rgn????? in data directory.

G. 1 Generating Ozone Data

 % cd ~/test/nicam_gl05_rl00/external_data/O3

G. 1. 1 Edit "mko3.cnf"

 &ADMPARAM
     glevel      = 5,
     rlevel      = 0,
     vlayer      = 40,
     rgnmngfname = '../../mnginfo/data/rl00-prc05.info',
 /
 &GRDPARAM
     hgrid_fname     = '../../../NICAM_DATABASE/hgrid/gl05/rl00/grid',
     vgrid_fname     = '../../grid/vgrid/data/vgrid40.dat',
     topo_fname      = '../MATSIRO/data/topog',
 /
 &MKO3PARAM
     input_fname  = '../../../NICAM_DATABASE/amip2o3_bin.dat',
     output_base  = './data/amip2o3',
     data_num     = 12,
 /
 &GMTRPARAM
     polygon_type = 'ON_SPHERE',
 /

G. 1. 2 Run mko3

 % mpirun -np 5 ${TOPPATH}/bin/mko3

mko3 must be executed with mpirun. This generates amip2o3.rgn????? in data/ directory

  % cd ~/test/nicam_gl05_rl00/external_data/OCN

H. 1 Edit "mkgisst.cnf.1" to create SST

 &ADMPARAM
     glevel      = 5,
     rlevel      = 0,
     vlayer      = 1,
     rgnmngfname = '../../mnginfo/data/rl00-prc05.info',
 /
 &GRDPARAM
     hgrid_fname     = '../../../NICAM_DATABASE/hgrid/gl05/rl00/grid',
     vgrid_fname     = '../../grid/vgrid/data/vgrid40.dat',
     topo_fname      = '../MATSIRO/data/topog',
 /
 &MKGISSTPARAM
     sst_lldata_fname = '../../../dataset/oisst_v2/sst.grd',
     output_sst_base  = './data/sst',
     num_data         = 16,
     data_periodic    = .false.,
     imax             = 360,
     jmax             = 180,
     slat             = 89.5,
     slon             = 0.5,
     dlat             = 1.0,
     dlon             = 1.0,
     opt_southward    = .false.,
     direct_access    = .true.,
 /
 &GMTRPARAM
     polygon_type = 'ON_SPHERE',
 /

• num_data: number of time step. e.g. num_data=31 if daily SST in January
• imax, jmax: number of grid points in longitude/latitude direction
• slat, slon: start latitude/longitude
• dlat, dlon: grid interval in latitude/longitude direction
• Each date is specified in nhm_driver.cnf (section J)

H. 1. 2 Run mkgisst

   % ln -s mkgisst.cnf.1 mkgisst.cnf
   % mpirun -np 5 ${TOPPATH}/bin/mkgisst
   % rm mkgisst.cnf

mkgisst must be executed with mpirun. This generates "sst.rgn????? in data/ directory.

H. 2 Edit "mkgisst.cnf.2" to create climatological sea ice mass

 &ADMPARAM
     glevel      = 5,
     rlevel      = 0,
     vlayer      = 1,
     rgnmngfname = '../../mnginfo/data/rl00-prc05.info',
 /
 &GRDPARAM
     hgrid_fname     = '../../../NICAM_DATABASE/hgrid/gl05/rl00/grid',
     vgrid_fname     = '../../grid/vgrid/data/vgrid40.dat',
     topo_fname      = '../MATSIRO/data/topog', 
 /
 &MKGISSTPARAM
     sst_lldata_fname = '../../../NICAM_DATABASE/rawdata/hadsst1979-1999_clm.dat',
     ice_lldata_fname = '../../../NICAM_DATABASE/rawdata/cmip3sit1979-1999_clm.dat',
     snw_lldata_fname = '../../../NICAM_DATABASE/rawdata/cmip3snw1979-1999_clm.dat',
     output_sst_base  = './data/hadsst1979-1999_clm',
     output_ice_base  = './data/cmip3ice1979-1999_clm',
     output_snw_base  = './data/cmip3snw1979-1999_clm',
     num_data         = 12,
     data_periodic    = .false.,
     direct_access    = .true.,
     offset           = 0.0,
     ice_fact         = 1000.0,
 /

H. 2. 2 Run mkgisst

   % ln -s mkgisst.cnf.2 mkgisst.cnf
   % mpirun -np 5 ${TOPPATH}/bin/mkgisst
   % rm mkgisst.cnf

mkgisst must be executed with mpirun. This generates "cmip3ice1979-1999.rgn?????" in data/ directory.

I. 2. 3 Run mkinit_atm

   % ${TOPPATH}/bin/mkinit_atm

mkinit_atm must be executed "without" mpirun. This generates "restart_atm.rgn?????"

I. 2. 4 Check (if necessary)

   % cd check
   % ${TOPPATH}/bin/ico2ll

open init_atm.ctl using GrADS and check!

I. 3 Generating initial condition of the ocean

I. 3. 1 convert ocean data into NICAM input data format

   % cd ~/test/nicam_gl05_rl00/initial_data
   % sh mk_ocn.sh ../../dataset/fnl/fnl_20040601_00_00

This scripts generates "ocn.dat". Check ocn.ctl by GrADS.

I. 3. 2 convert ocean data

   % cd OCN
   % vi mkinit_ocn.cnf

 &NM_MKINIT_OCN
     glevel             = 5,
     rlevel             = 0,
     hgrid_basename     = '../../../NICAM_DATABASE/hgrid/gl05/rl00/grid',
     veget_basename     = '../../../NICAM_DATABASE/sfcdata/gl05/rl00/matsiro/veget_mat',
     latlon_ocean_fname = 'ocn.dat',
     fpath_in           = '..',
     fpath_out          = '.',
     init_basename      = 'init_ocn',
 /

I. 3. 3 Run mkinit_ocn

   % ${TOPPATH}/bin/mkinit_ocn

mkinit_ocn must be executed "without" mpirun. This generates "restart_ocn.rgn?????"

I. 3. 4. Check

   % cd check
   % ${TOPPATH}/bin/ico2ll

You can open init_ocn.ctl using GrADS.

I. 4 Generating land data

I. 4. 1 convert land data into NICAM input data format

By default, mk_lnd.sh is for grib1 data of NCEP Final Analysis (1999.07.30-). If you use grib2 data (2007.12.06-), comment out lines of "# for grib1" and comment in those of "# for grib2"

   % cd ~/test/nicam_gl05_rl00/initial_data
   % sh mk_lnd.sh ../../dataset/fnl/fnl_20040601_00_00

This scripts generates "lnd.dat".

I. 4. 2 convert land data

   % cd LND
   % vi mkinit_lnd.cnf

 &NM_LAND_GRID
     glevel         = 5,
     rlevel         = 0,
     hgrid_basename    = '../../../NICAM_DATABASE/hgrid/gl05/rl00/grid',
 /
 &NM_MKINIT_LND
     opt_ncep2mat      = .true.,
     merged_rst_in     = .true.,
     fpath_out         = './', 
     fpath_in          = '../',
     ncep_sfc_filename = 'lnd.dat',
     merged_output_restfname(2) = 'init_lnd',
     opt_albsfc_in     = .false.,
     opt_albsfc_out    = .true.,
 /
 &NM_LAND_INIT
 /

I. 4. 3 Run mkinit_lnd

   % ${TOPPATH}/bin/mkinit_lnd

mkinit_lnd must be executed "without" mpirun. This generates "restart_lnd.rgn?????".

I. 4. 4 Check

   % cd check
   % ${TOPPATH}/bin/ico2ll

J. 1 Start NICAM!

J. 1. 1 Edit "nhm_driver.cnf"

   % cd ~/test/nicam_gl05_rl00/run/output_01-03dy
   % vi nhm_driver.cnf

See nhm_driver.cnf for details.

If you want to change integration time, modify LSTEP_MAX in &TIMEPARAM. If you use daily SST data, change &nm_extdata, for example,

 &nm_extdata
     dataname          = 'SST',
     fname             = '../../external_data/OCN/data/sst',
     num_of_data       = 7,
     data_date(:,1)    = 2004, 6,01,0,0,0,
     data_date(:,2)    = 2004, 6,02,0,0,0,
     data_date(:,3)    = 2004, 6,03,0,0,0,
     data_date(:,4)    = 2004, 6,04,0,0,0,
     data_date(:,5)    = 2004, 6,05,0,0,0,
     data_date(:,6)    = 2004, 6,06,0,0,0,
     data_date(:,7)    = 2004, 6,07,0,0,0,
     layer_type        = 'SFC',
     opt_periodic_year = .false.,
 /

(num_of_data should be less <= 1280)

J. 1. 2 Run nhm_driver (NICAM)

   % mpirun -np 5 ${TOPPATH}/bin/nhm_driver

Check "msg.rgn*****" for whether integration is successfully finished.

J. 1. 3 Output File Description

• restart.rgn????? : restart file of the atmosphere
• restart_ocn.rgn????? : restart file of the ocean
• restart_lnd.rgn????? : restart file of the land
• restart_diagvar.rgn????? : restart file
• [varname].rgn????? : output in icosahedral grid
• history.info : output file information

Output files below are not used in the current NICAM

• restart_ALB_SFC.rgn?????
• restart_ALB_SFC.pl
• restart_CBMFX.rgn?????

J. 1. 4 Move Files

   % rm restart_ALB_SFC* restart_CBMFX*
   % mv restart.* restart_* restart/
   % mv *rgn* icodata/

K. 1 post process - ico2ll

ico2ll converts output in icosahedral grid to lat-lon grid for GrADS.

K. 1. 1 Edit "ico2ll.cnf"

   % vi ico2ll.cnf

 &ico2ll_param
     glevel     = 5,
     rlevel     = 0,
     input_dir  = './icodata/',
     output_dir = './lldata/'
     info_fname = 'history.info',
     llmap_dir  = '../../grid/llmap/data/'
     llmap_base = 'llmap',
     lon_swap   = .true.,
     input_size = 4,
     init_year  = 2004,
     init_month = 6,
     init_day   = 1,
 /

set start time. history.info and llmap are used by ico2ll.

J. 1. 2 Run ico2ll

   % ${TOPPATH}/bin/ico2ll

This generates "*.ctl *.grd" in lldata/ directory.

   % cd ../output_04-06dy

K. 1 Edit nhm_driver.cnf

See nhm_driver.cnf for how to restart. You should modify &TIMEPARAM, restart filename, and so on. (see comments in nhm_driver.cnf for details) Again, follow J.1.2 - K.

   % cd ../ctl
   % vi ctl_gen.sh (edit DAY_LIST)
   % ./ctl_gen.sh

You can access everytime data from control files here.

1. 1 topography data

• USGS GTOPO30
  • Resolution: 30 arc sec. (approximately 1km)
  • URL: http://edc.usgs.gov/products/elevation/gtopo30/gtopo30.html

Original GTOPO30 data is devided into several blocks. We must combine the block files into one file.

1. 2 vegetation data

• • USGS GLCC Simple Biosphere 2 Model (GSiB22)
  • Resolution: 30 arc sec. (approximately 1km)
  • URL: http://edcftp.cr.usgs.gov/pub/data/glcc/globdoc2_0.html

If you need other information, please check the previous version of NICAM tutorial