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The Evaluation for City Greening Land Construction to Mitigate the Heat Island Effect in Shanghai

机译：城市绿化土地建设评价，减轻上海热岛效应

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First the evolution and situation of heat island in Shanghai area are summarized , and the question of how mitigating the heat island effect is put forward. Based on the dense observation data inside and outside Yang -Zhong greening land in recent three years, the mitigation for greening land construction to heat island effect is evaluated. Meanwhile a cylindrical model to estimate the effect of decreasing temperature of Yang-Zhong greening land is designed. The comparison of the monthly mean maximum temperatures indicates that in summer the greening land can reduce the temperature as much as 0. 6°C , the temperature difference between inside and outside greening land exists seasonal fluctuation, the middle value of the seasonal fluctuation tends negative, it is resulted from the different thermal capacity between inside and outside of the greening land and the effect of shading and evaporation of plant leaves. With expending and glowing of the Yang-Zhong greening land, the heat island intensity of the greening land itself is decreasing. In recent three years the extensive construction of city greening land has mitigated the heat island intensity in the central city zone in the range of 0. 2 — 0. 4°C of the monthly mean maximum temperatures in summer.
机译：首先，总结了上海地区热岛的演变和情况，提出了热岛效应的问题。基于近三年内外杨忠绿化土地内外的密集观察数据，评估了加热岛效应的绿化土地建设缓解。同时，设计了一种圆柱形模型，估计杨钟绿化土地降低效果的效果。每月平均最大温度的比较表明，在夏季，绿化土地可以将温度降低到0. 6°C，内外绿化土地之间的温差存在季节性波动，季节性波动的中间值趋于负，它是由于绿化土地内外的不同热容量和植物叶片遮蔽和蒸发的效果。随着阳中绿化土地的消耗和发光，绿化土地本身的热岛强度正在下降。在近三年的城市绿化用地粗放建设缓解了中心城区热岛强度在0.2的范围内 - 0。4℃，夏季月平均最高气温的温度。

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