利用川渝地区44个气象台站的气象资料和2个物候观测站的物候资料分析了该地区的气候与物候变化特征:最近10 a年均温度比前30多a高0.68℃,年均降水量基本无变化。低温主要分布在川西高原,低温天数、低温积温绝对值都在减少。日均最高温度在高原南部、西南山地减少,其它地区都增加;日均最低温度都在增暖。降水在四川盆地下降,在重庆西部、川西高原增加。降水日数在高原西部增加,其它地区都下降。春始期仁寿略微推迟,北碚微弱提前;秋始期都推迟。展叶期的杏树、刺槐、水杉、紫荆、梧桐推迟,紫藤、毛桃提前。落叶期仁寿刺槐提前,北碚的植物全部推迟。
According to the daily temperature and precipitation data of 44 stations in 1961-2007 and part of the woody plant data of Beibei observation stations and Renshou observation stations in 1963-1988, the Chinese Academy of phenological observation network in Sichuan-Chongqing, temperature, precipitation, season, woody plant phenology variation were analyzed. The results showed that mean annual temperature of the last 10 years were 0.68 ℃ higher than the previous 37 years, and mean annual precipitation basically unchanged. Low temperature is mainly distributed in the western Sichuan Plateau, and the number of low temperature days and accumulated low temperature decreased. Mean daily maximum temperature in the southern region of the western Sichuan Plateau tended to decrease, while that in other regions increased. Mean daily minimum temperature was confirmed to have warming trends, and that in the southwestern Sichuan and the northern Sichuan Plateau grew faster. Precipitation in the central and southern of Sichuan Basin declined, southwest of Chongqing and western Sichuan plateau tended to increase. Precipitation days in the western Sichuan Plateau demonstrated an increasing trend, that in other regions tended to decrease, especially, those decreased rapidly in the east of Sichuan and Chongqing. According to Zhang Baokun Designate Temperature Method to define seasons, spring starting time delayed in Renshou, advanced in Beibei, and autumn starting time delayed in those two stations. In the leaf expansion phase, apricot and black locust of Renshou, and black locust, Metasequoia, Bauhinia, Indus of Beibei delayed, wisteria, peaches of Beibei advanced. In the leaf defoliation stage, black locust of Renshou advanced, but all plants of Beibei delayed.
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