from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. A unit of measurement equal to a difference of one degree between the mean outdoor temperature on a certain day and a reference temperature, used in estimating the energy needs for heating or cooling a building.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. Alternative form of degree day.


Sorry, no etymologies found.


  • With regard to air temperature, combined regional data from the mid-1970s onward show relatively small magnitude, positive trends in thawing degree-day totals, and a rise in mean annual air temperature.

    Climate change impacts on the Yamal Nenets of northwest Siberia

  • Annual heating degree-day totals characterize the demand for heating over the entire cold period.

    Infrastructure and climate in the Arctic

  • As climate change effects become more pronounced (e.g., degree-day boundaries or mean temperature isotherms shift northward), the more ecologically vagile species are likely to extend their geographic ranges northward [17].

    Changes in aquatic biota and ecosystem structure and function in the Arctic

  • Growing degree-day requirements for various crops from the highest-latitude areas possible were obtained from the literature, and similar GDD requirements were assumed for a given crop throughout the region.

    Agriculture in the Arctic

  • Growing degree-day analysis When GDD0 was used for analysis, all of the ACIA-designated models projected that all the examined locations would be suitable for green pea production early in this century, and the high-extreme models (GFDLR30_ c and CGCM2) projected climates suitable for barley at all locations by 2030.

    Agriculture in the Arctic

  • Growing degree-day requirements for various annual crops to reach maturity [16] and for forage crops to reach optimum harvest stage [17].

    Agriculture in the Arctic

  • As I have been known to opine before, "A degree-day saved is a degree-day earned."

    Unfortunate metaphor

  • Well, as Poor Richard always used to say, "A degree-day saved is a degree-day earned."

    42 F in the morning...

  • In 14% of the documented responses, the plant trait was correlated with thawing degree-day totals from snowmelt TDDsm, and temperature was considered the dominant factor.

    Unthreaded #8 « Climate Audit

  • Well, as Wife is wont to say, a degree-day saved is a degree-day earned.

    Sun god back


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