Climate Types and Related Map Samples Contained Within BONAP's Floristic Synthesis.

 (Click each map twice for maximum enlargement)

 

Climate

Climate zones of the Lower 48, based on zones of the warmest 6 months, coldest month, and moisture index (ratio of precipitation and positive temperature average; 1971-2000 data from PRISM ©BONAP

Climate
Composite map of climate, soil texture, wetlands, soil pH, and topography.
©BONAP
Tmax
Average temperature of warmest month (July) in °C (Data from PRISM, based on 1971-2000 climate normals) ©BONAP
Tmin
Average temperature of coldest month (January) in °C (Data from PRISM, based on 1971-2000 climate normals) ©BONAP
pptcm
Annual precipitation in centimeters (Data from PRISM, based on 1971-2000 climate normals) ©BONAP
%ppt
Percent of annual precipitation falling May-October, the warmest 6 months of the year
(Data from PRISM, based on 1971-2000 climate normals) ©BONAP
sumbiot
Warmth index (positive temperature averages for the warmest 6 months; i.e. May - October averaged, whereby monthly temperatures less than 0
°C are assumed zero) ©BONAP
moisture
Moisture index (ratio of annual precipitation over annual evapotranspiration, where evapotranspiration is estimated by multiplying the annual positive temperature average, or Holdridge biotemperature, by58.93mm/
°C) ©BONAP

annualtemp
Holdridge biotemperature (annual positive temperature average with no maximum limit) ©BONAP
AllGlaciers

US County-level assessment of all glaciated areas ©BONAP

MaxExt

US County-level assessment of the maximum extent of glaciated areas ©BONAP
CordIce

US county-level assessment of the Cordileran Ice Sheet  ©BONAP

 MtGlac

US county-level assessment of mountain glaciers ©BONAP

WiscIce

US county-level assessment of the Wisconsin Ice Sheet ©BONAP

 USDA

USDA Plant Hardiness Zones

 TenZon

Tension zones (tension zones are areas of steeper slope or where the contours are close together) ©BONAP

 LatMean

Relative latitude of county floras, ©BONAP

 TenCont

Tension zone contours (tension zones are areas of steeper slope or where the contours are close together) ©BONAP

 eastwest

East/West Tension Zones (Tension Zones are areas of steeper slope or where the contours are close together) ©BONAP

 
 
 

Last updated March 29, 2011.