README -- Contents of leaf_area_index_200412
23 Oct 2008
Bob Yantosca, Philippe Le Sager, and Claire Carouge
geos-chem-support@g.harvard.edu


These files contain the AVHRR LAI for year 2000 generated by the 
Boston University Climate and Vegetation Research Group 
[http://cliveg.bu.edu/research/research.html].

Files:
------
lai01.global   : Jan leaf area indices, GCAP 4 x 5 grid
lai02.global   : Feb leaf area indices, GCAP 4 x 5 grid	  
lai03.global   : Mar leaf area indices, GCAP 4 x 5 grid	  
lai04.global   : Apr leaf area indices, GCAP 4 x 5 grid	  
lai05.global   : May leaf area indices, GCAP 4 x 5 grid	  
lai06.global   : Jun leaf area indices, GCAP 4 x 5 grid	  
lai07.global   : Jul leaf area indices, GCAP 4 x 5 grid	  
lai08.global   : Aug leaf area indices, GCAP 4 x 5 grid	  
lai09.global   : Sep leaf area indices, GCAP 4 x 5 grid	  
lai10.global   : Oct leaf area indices, GCAP 4 x 5 grid	  
lai11.global   : Nov leaf area indices, GCAP 4 x 5 grid
lai12.global   : Dec leaf area indices, GCAP 4 x 5 grid
vegtype.global : Olson landtypes and fractions for each grid box, 
                 GCAP 4 x 5 grid

Files are ASCII format.


Source:
-------
lai*.global and vegtype.global were created with IDL program

     ~/IDL/gamap2/regridding//regridavhrr_lai.pro

using 0.5 x 0.5 input files 
	
    ~bmy/archive/data/leaf_area_index_200412/05x05_gen/
        LAI_PAL_V3_0.5DEGREE_??_2000

    ~bmy/archive/data/leaf_area_index_200202/05x05_gen/owe14d.0.5

Original LAI data for 1981 - 2001 are available at:

    ftp://crsa.bu.edu/pub/rmyneni/myneniproducts/datasets/
      AVHRR_DATASETS/PATHFINDER/VERSION3_DATA/LAI/0.5DEGREE/

Notes:
------
(1) Leaf Area index is defined as [cm2 leaf / cm2 grid box].