Figure 2
From: Impacts of global warming on residential heating and cooling degree-days in the United States
Maps of interpolated historical (1981–2010) and future (2080–2099) US HDD + CDD, calculated from NOAA’s 30-year daily degree-day normals and CMIP5 RCP8.5 climate model output, respectively.
(a) Historical (1981–2010) HDD + CDD. (b) Future (2080–2099) HDD + CDD. Historical HDD + CDD were computed from temperature data recorded by 7,438 US weather stations. In Fig. 2, Alaska (0–20,000 HDD + CDD, step 1,000) is found on a different scale than the contiguous US and Hawaii (0–10,500 HDD + CDD, step 500), because of Alaska’s large HDD + CDD values. The maps were generated in ESRI ArcMap 10.2 (Environmental Systems Resource Institute, ArcMap 10.2 ESRI, Redlands, California, USA) using an ordinary kriging tool.
