Additional Climate Variables

[whmacken]

Yearly Variables

Cold:

• [ ] Number of days with killing frosts (killing @ -4C)= pGSKF by month.
• [ ] Daymet includes snow water equivalent, which we can use to more directly estimate monthly precipitation as snow.
• [ ] Annual Growing Season Start Date (GSSD) (soil temperature >5C)
• [ ] Annual Growing Season Start Date delay (based on sum of low winter temps with no snow cover)

Heat

• [ ] Monthly sum of days with tmax exceeding temps in 5C intervals from 30-50C

Drought

• [ ] Annual Winter precip deficit adjusted soil water (SMI) or CMD.total (adds lack of nonGS soil recharge to GS CMD)

**Normal Period Variables (extremes) **

• [ ] Monthly/Seasonal Normal period number of years with a killing frost event by month (values are 0-20 years)
• [ ] Annual Drought period: multiyear drought (highest 3-year moving sum of accumulated CMD.total over the normal period)
• [ ] Palmer Drought Severity Index
• [ ] Monthly/Seasonal Excess Heat Days. Mean and max number of excess days by month over 20 years. (for 30, 35, 40, 45, 50+)

[kdaust]

Use Daymet/Chelsea to calculate derived variables using gridded parameters. This would improve on the ClimateBC approach of using universal parameters for North America.

[whmacken]

Some papers relevant to new climate variables https://climatedataguide.ucar.edu/climate-data/palmer-drought-severity-index-pdsi https://pubs.cif-ifc.org/doi/10.5558/tfc2014-134 https://www.sciencedirect.com/science/article/pii/S0168192313001020

[whmacken]

Explore some of the functions in this new R package. https://www.authorea.com/doi/full/10.22541/au.169769525.52686463

[cmahony]

Explore some of the functions in this new R package. https://www.authorea.com/doi/full/10.22541/au.169769525.52686463

good find @whmacken !