由於綠屋頂隔熱相關研究皆集中在夏季，且材料多為固體或植栽，為了解屋頂水塘在冬季之溫度調節效果，本研究設計了實驗水塘，藉由控制其深度、底色深淺，探討其冬季（二月）溫度調節之效能。結果顯示，冬季（二月）時，水塘不同水深（最高30cm）、底色之處理所造成的溫度差異，在統計上皆不顯著。整體而言，氣溫與不同處理、地表溫度與不同處理的變異數分析（ANOVA）結果，皆顯示無明顯差異；但進一步分為晴天、陰天、雨天後，則發現陰天與雨天會造成氣溫與不同處理的顯著差異，雨天則會造地表溫度與不同處理的顯著差異。回歸分析結果顯示，地表溫度可由氣溫推估而得（y = 1.7787x - 13.458，R^2 = 0.9919）。因此，本文發現冬季時屋頂水塘的溫度調節模式與夏季不盡相同，且陰、雨天的模式又異於整體或晴天模式。希望此結果有助於綠屋頂的未來研究。

Most researches on green building roofing focus on its effect in summer time and on solid material or plantation. This study designed roof ponds, with different lining fabric color and depths of water, to investigate the effect of roof pond on the temperature regulation in winter. Results from ANOVA showed that both color and depths (up to 30cm) were of no effect on temperature regulation in winter. There was no significant difference between ambient temperature and various designs, and between floor temperature and various designs. If the data were further grouped into fairy, cloudy and rainy days, significant differences were found in rainy days between ambient of floor temperatures and various designs. However, floor temperature could be estimated by ambient temperature (y = 1.7787x - 13.458, R^2 = 0.9919). Furthermore, the temperature regulation pattern in winter was found to be different from that of summer, as was cloudy and rainy days. These findings could help future studies of green roof.