Data Tables

For each climatic parameter, we include more detailed versions of the example tables discussed above. A reader may obtain paleoclimatic estimates from their own paleobotanical data in the manner demonstrated in the two examples in the previous section. The data tables are spreadsheets for both the unweighted and weighted approaches. For a given climatic parameter, one can simply copy the columns corresponding to the list of taxa present in a North American vegetation assemblage and paste these into a new spreadsheet. By summing the values across the rows, one can determine the climatic values aligned with the range of complete overlap of the species involved (and the maximum sum of weights from the weighted matrices). The midpoints of these ranges can then be designated as the MCR_un (unweighted) and MCR_wt (weighted) estimates of the climate represented by the vegetation list.

The "Data Tables" are labeled as such and are titled and scaled as follows:
1. Mean temperature of the coldest month (MTCO): 541 increments of 0.1°C from –34° to 20°C.
2. Mean temperature of the warmest month (MTWA): 361 increments of 0.1°C from 1° to 37°C.
3. Mean annual temperature (ANNT): 401 increments of 0.1°C from –15° to 25°C.
4. Growing degree days (on a 5°C base, GDD5): 1,461 increments of 5 from 0 to 7,000 growing degree days.
5. Mean January precipitation (JANP): 516 increments of 1 mm from 0 to 515 mm.
6. Mean July precipitation (JULP): 281 increments of 1 mm from 0 to 280 mm.
7. Mean annual precipitation (ANNP): 987 increments of 5 mm from 0 to 4,930 mm.
8. Actual evapotranspiration/potential evapotranspiration (AE/PE): 1,001 increments of 0.001 of this ratio from 0 to 1.

Data Tables
(These tables are in Microsoft Excel format and are designed to be opened independently, instead of viewed in a web browser. Free Excel file viewers are available from various sources, including Microsoft and the OpenOffice project.)

• Data Table 1a. Unweighted mean temperature of the coldest month (MTCO)
• Data Table 1b. Weighted mean temperature of the coldest month (MTCO)
• Data Table 2a. Unweighted mean temperature of the warmest month (MTWA)
• Data Table 2b. Weighted mean temperature of the warmest month (MTWA)
• Data Table 3a. Unweighted mean annual temperature (ANNT)
• Data Table 3b. Weighted mean annual temperature (ANNT)
• Data Table 4a. Unweighted growing degree days (on a 5°C base, GDD5)
• Data Table 4b. Weighted growing degree days (on a 5°C base, GDD5)
• Data Table 5a. Unweighted mean January precipitation (JANP)
• Data Table 5b. Weighted mean January precipitation (JANP)
• Data Table 6a. Unweighted mean July precipitation (JULP)
• Data Table 6b. Weighted mean July precipitation (JULP)
• Data Table 7a. Unweighted mean annual precipitation (ANNP)
• Data Table 7b. Weighted mean annual precipitation (ANNP)
• Data Table 8a. Unweighted actual evapotranspiration/potential evapotranspiration (AE/PE)
• Data Table 8b. Weighted actual evapotranspiration/potential evapotranspiration (AE/PE)