degree-days

The year-over-year increase of $24 would be worse if not for the fact that heating degree-days are expected to be 3 percent warmer this winter.

Heating costs expected to edge up this winter 2010

The year-over-year increase of $24 would be worse if not for the fact that heating degree-days are expected to be 3 percent warmer this winter.

Heating costs expected to edge up this winter 2010

Projected reductions in the number of heating degree-days (Fig. 16.24) can be used as a metric for the reduction in heating energy consumption.

Infrastructure and climate in the Arctic 2009

Growing degree-days (a measure of accumulated heat energy) are considered a good predictor of plant phenology and are often used to project the timing of different plant growth stages.

Agriculture in the Arctic 2009

Projected decrease in the number of heating degree-days in 2050 as a percentage of 1999 values, calculated using the Fig. 16.23.

Infrastructure and climate in the Arctic 2009

Daily heating degree-days are calculated by subtracting the mean daily temperature from the 8 ºC threshold (e.g., a day with a mean daily temperature of 5 ºC would result in three heating degree-days); days with a mean temperature at or above 8 ºC result in zero heating degree-days.

Infrastructure and climate in the Arctic 2009

Growing degree-days are a measure of accumulated heat energy, calculated by taking the sum of daily mean temperatures above some defined threshold.

Use and evaluation of the ACIA forest and agriculture scenarios 2009

Projected growing degree-days calculated from the highest and lowest model-projected temperatures for each site.

Agriculture in the Arctic 2009

The primary variables obtained from the climate model output were mean monthly temperature, total monthly precipitation, and growing degree-days (GDDs).

Use and evaluation of the ACIA forest and agriculture scenarios 2009

Even though heating degree-days rose by 5.6 percent last year, the summer was cooler than in 2007, resulting in a cooling-degree-days drop of 8.7 percent.

By the Numbers: Energy-related carbon-dioxide emissions declined in 2008 2009