Appendix 5. Biogeoclimatic units codes

Code	Zone
AT	Alpine Tundra
BG	Bunchgrass
BWBS	Boreal White and Black Spruce
CDF	Coastal Douglas-fir
CWH	Coastal Western Hemlock
ESSF	Engelmann Spruce - Sub-alpine Fir
ICH	Interior Cedar - Hemlock
IDF	Interior Douglas-fir
MH	Mountain Hemlock
MS	Montane Spruce
PP	Ponderosa Pine
SBPS	Sub-Boreal Pine - Spruce
SBS	Sub-Boreal Spruce
SWB	Spruce - Willow - Birch

Subzones are designated by 2 letters. The first letter indicates the moisture regime:

x	very dry
d	dry
m	moist
w	wet
v	very wet

The second letter indicates continentality on the coast (CWH and MH):

h	hypermaritime
m	maritime
s	submaritime

and temperature regime in the interior (all other zones):

h	hot
w	warm
m	mild
k	cool
c	cold
v	very cold

For example,

CWHwh	Coastal Western Hemlock wet hypermaritime subzone
IDFww	Interior Douglas-fir wet warm subzone
Bgxh	Bunchgrass very dry hot subzone