The cooling Degree Days are used as an index to estimate the cooling energy consumption in summer. The spatial distribution and long-term change feature of cooling Degree Days were analyzed.

该文采用降温度日数作为评估夏季降温耗能的指标，分析了我国夏季降温度日分布和长期变化特征。

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BizEE Software, a South Wales, U.K., company that develops software to help building managers assess their energy-fuel needs, publishes a measure called degree days for places around the world that highlights this variation in temperature.

WSJ: In the Forecast: New Ways to Measure the Temperature