Research on pleasing effect for micro-climate around a house by the wind-break forest and examination about the protection of wind-break forests around the farmhouse.

《联合国气候变化框架公约京都议定书》于2005年2月生效，日本政府大力支持工厂完成二氧化碳减排承诺的行动。另一方面，由于我国每年大量的防风林被砍伐，二氧化碳从树上排放到大气中。本文对仙台平原防风林的分布及其对林内小气候的宜人效应进行了调查研究。(1)防风林的分布：面积(长、宽、高)、树种等(2)防风林对小气候的宜人效应：气温、风速(3)森林对空气污染的净化作用：氮氧化物、一氧化氮和PM(4)树木中二氧化碳质量的估算：单位面积的树木密度、单位面积的二氧化碳质量(5)防风林的减少：航空照片上森林面积的测量1961-1999(6)农户意向调查：砍伐森林的原因及防风林的利弊根据研究资料，仙台平原现有大量防风林，但由于仙台市城市化面积的扩大，整个仙台平原的防风林明显减少，近40年来仙台平原中部的森林总面积减少了约40%。由于森林保留了二氧化碳，对小气候或空气污染有影响，因此，保护和培育森林是一个重要的行动。大多数阿尔德帕森斯人倾向于保留森林，但大多数年轻家庭倾向于砍伐和清理房屋区域。保护森林得到公众的支持是很重要的。

"Kyoto Protocol to the United Nations Framework Convention on Climate Change" went into effect on February 2005, and Japanese government powerfully support the plant action to complete the engagement of decrease the emission of carbon dioxides. On the other hand,, because of numerous wind-break forests are cut year by year, the carbon dioxides is discharged into atmosphere from the tree in our country. In this research on the distribution of wind-break forests and pleasing effect on micro-climate in and around the forests in Sendai plain, we have some surveys as follows;(1) Distribution of wind-break forests : area (length, width, height), tree species and so on(2) Pleasing effects by forests on micro-climate : air temperature, wind speed(3) Purify effect of forest on air pollution : nitrogen dioxides nitric oxide and PM(4) Estimate of carbon dioxides mass in the tree : density of trees in unit area, CO2 mass in unit area(5) Decrease of wind-break forests : measuring of forests area on the air photograph, 1961-1999(6) Intention survey about the farm family : reason why cut the forest and the merits or demerits of wind-break forestAccording the research data, a lot of wind-break forests are existing now, but clearly decreasing at all of the Sendai plain because of the extending urbanized area of Sendai city, and total amount of forest area decreased about 40% in last 40 years, in the central part of Sendai plain. As the forests keep the carbon dioxides and have the effect on micro-climate or air pollution, it is important action what to keep and grow the forest. Most of alder parsons are tend to keep the forest, but most of younger families tend to cut and clear the house area. It is important to public support to keep the forests.