Phenology of Aspen

 RenR480 Course Project

Climate data was interpolated by ClimatePNW from 1961 to 1990. The input information is longitude, latitude and elevation, and the output data contain all items list below:

Climate data

Directly calculated variables:

MAT                       mean annual temperature (°C),

                 MWMT               mean warmest month temperature (°C),

                 MCMT                   mean coldest month temperature (°C),

TD                           temperature difference between MWMT and MCMT, or continentality (°C),

                 MAP                         mean annual precipitation (mm),

                 MSP                         mean annual summer (May to Sept.) precipitation (mm),

                          AH:M                   annual heat:moisture index

                                                  (MAT+10)/(MAP/1000))

                 SH:M                       summer heat:moisture index ((MWMT)/(MSP/1000))

                

Derived variables:

                 DD<0                       degree-days below 0°C, chilling degree-days

                 DD>5                       degree-days above 5°C, growing degree-days

DD5100                the Julian date on which DD>5 reaches 100, the date of budburst for most plants

                 DD<18                  degree-days below 18°C, heating degree-days

                 DD>18                  degree-days above 18°C, cooling degree-days

                 NFFD                       the number of frost-free days

                 FFP                           frost-free period

                 bFFP                         the Julian date on which FFP begins

                 eFFP                         the Julian date on which FFP ends

                 PAS                          precipitation as snow (mm)

                 EMT                         extreme minimum temperature over 30 years