Dendrochronological assessment for air pollution using stumps of Cryptomeria japonica (Sugi)

利用柳杉树桩对空气污染进行树木年代学评估

• 批准号: 06680500
• 负责人: KATOH Terutaka
• 金额: $ 1.34万
• 依托单位: TOYAMA MEDICAL AND PHARMACEUTICAL UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1994
• 资助国家: 日本
• 起止时间: 1994 至 1995
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-06680500/
• 关键词: Dendrochronology; Tree ring-width; Standardized ring index; Sugi; Cryptomeria japonica; Stump; Air pollution; Sulfur oxides; 年輪指数

A total of 20 cores were collected from the stumps of Cryptomeria japonica growing in Toyama Prefecture. After polishing the cores, the ring-widths were measured to the nearest 0.01 mm using a dliding linear table (LINTAB). This instrument was interfaced with an IBM-compatible personal computer and the data were analyzed by a time series analysis program (TSAP-X). Specimens those taken by another research projects were also incorporated in this study. The results were as follows.(1) After removing the effects of tree age and climatic conditions the impacts of air pollutants on increment growth in Cryptomeria japonica was analyzed. During the period of the late '60s to the early '70s, when serious air pollution was recorded, decreased increment growth was observed. Since the mid '70s increased increment growth in Cryptomeria japonica was observed with decreasing levels of air pollutants.(2) The impact of three categories of air pollutants, i. e., sulfur oxides, nitrogen oxides and oxidants, on increment growth was studied by a multiple regression analysis. The levels of aulfur oxides were suggested to be the determining factor.(3) In generally, a similar pattern in ring-width was observed with Cryptomeria japonica those growing in the plain area and the mountain area. This means that time series of the ring-width in these two areas are quite similar but large gaps are observed in some exceptional years. It is suggested that the large gap in special year has its origin in the heavy snowfall in plain area and/or unusual light snowfall in the mountain area.

从富山县生长的柳杉树桩中总共采集了20个芯。在抛光芯之后，使用滑动线性表（LINTAB）测量环宽度，精确到0.01mm。该仪器与IBM兼容的个人计算机连接，并通过时间序列分析程序（TSAP-X）分析数据。其他研究项目的标本也被纳入本研究。结果如下。(1)在剔除树龄和气候条件的影响后，分析了大气污染物对柳杉生长的影响。在六十年代末至七十年代初，当空气污染严重时，增长率下降。自70年代中期以来，随着空气污染物水平的降低，柳杉的生长量增加。(2)三种空气污染物的影响，即。例如，硫氧化物、氮氧化物和氧化剂对生长的影响。硫氧化物的水平被认为是决定因素。(3)一般来说，生长在平原和山区的柳杉年轮宽度的格局相似。这意味着这两个地区的年轮宽度的时间序列是非常相似的，但在一些特殊的年份观察到大的差距。分析认为，特殊年份的大差距与平原地区的强降雪和山区的异常小雪有关。

项目成果

Taniguchi N: "Tree rings, From the past to the future, Proceedings of the International Workshop on Asian and Pacific Dendrochronology" Forestry and Forest Research Institute. 286 (1995)

谷口 N：“树木年轮，从过去到未来，亚洲及太平洋树木年代学国际研讨会论文集”林业和森林研究所。

Katoh T.: "Proceedings of the International Workshop on Asian and Pacific Dendrochronology" Forestry and Forest Products Research Institute, 286 (1995)

Katoh T.：“亚洲及太平洋树木年代学国际研讨会论文集”林业和林产品研究所，286（1995）

Katoh T.: "Proceedings of the International Workshop on Asian and Pacific Dendrochronology" Forestry and Forest Products Research Instirute, 286 (1995)

Katoh T.：“亚洲及太平洋树木年代学国际研讨会论文集”林业和林产品研究所，286（1995）

Katoh T: "Tree rings, From the past to the future, Proceedings of the International Workshop on Asian and Pacific Dendrochronology" Forestry and Forest Research Institute. 286 (1995)

Katoh T：“树木年轮，从过去到未来，亚洲及太平洋树木年代学国际研讨会论文集”林业和森林研究所。

Katoh T.: "Effects of air pollution on ring width of Japanese Cedars and on the health of schoolchildren around a local emission source." Archives of Complex Environmental Studies. (発表予定).

Katoh T.：“空气污染对日本雪松环宽和当地排放源周围学童健康的影响。”（即将提交）。