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growth of tree ring
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  “growth of tree ring”译为未确定词的双语例句
     The response surfaces of tree ring and climate indicate that growth of tree ring in Yishan mountain is nonlinear correlated with precipitation and temperature. It is unreasonable to reconstruct climatic variables separately using traditional methods.
     树轮和气候要素的响应面分析得出沂山地区的树轮生长和温度降水呈非线性相关,因此使用传统方法重建单个气候因子是不合理的。
短句来源
     The growth of tree ring width was responded principally to the precipitation in May, which might be influenced by the activity of southwest monsoon, whereas the maximum latewood density reflected the summer temperature (June-September).
     树轮宽度主要受5月降水影响,和西南季风活动有关; 而最大密度主要指示了夏季(6 ̄9月)温度。
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  相似匹配句对
     The growth of E.
     重组HBD 2对E.
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     the growth’s footprint
     成长的足迹
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     The growth curves of Z.
     对Z.
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     On Knowledge Growth
     论知识增值机制
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     Growth Stresses in Trees
     树木的生长应力
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ree ring chronologies are a major source of paleoclimatic information in China, especially in Northwest China. For some reasons, there are seldom studies about the tree ring in eastern China. In this paper the major tree ring chronology (1750~1992) in Yishan, Shandong Province, was analyzed by running program ARSTAN. The response surfaces of tree ring and climate indicate that growth of tree ring in Yishan mountain is nonlinear correlated with precipitation and temperature. It is unreasonable to reconstruct...

ree ring chronologies are a major source of paleoclimatic information in China, especially in Northwest China. For some reasons, there are seldom studies about the tree ring in eastern China. In this paper the major tree ring chronology (1750~1992) in Yishan, Shandong Province, was analyzed by running program ARSTAN. The response surfaces of tree ring and climate indicate that growth of tree ring in Yishan mountain is nonlinear correlated with precipitation and temperature. It is unreasonable to reconstruct climatic variables separately using traditional methods. The reconstructed moisture index (P/T) during May to August, in which both temperature and precipitation influence the treering growth, was estimated from response function and regression model. The relationship between tree ring and moisture index (May to August) is obvious. The predictive equation (Y=1481X+565) was obtained from a linear regression model, where Y is predicted value of moisture index, X is tree ring width index. As a result, the local moisture index in 1750 AD at Yishan, Shandong Province, was reconstructed based on tree ring chronologies.For verification of the reliability of the reconstructed moisture index in Yishan area, the dry years were selected from document data, which were used to compare with the years with the small reconstructed moisture index. From 1750 to 1960, there are 32 dry years in document data, which were coincided with the 24 small moisture index years (1758,1768,1774,1778,1786,1805,1814,1825,1837,1838,1856,1860,1876,1877,1878,1899,1907,1917,1920,1925,1927,1948,1952,1959). There are 75 percent correct predictions, which indicates that the reconstructed results were reliable.

在中国,尤其在中国西北部地区,树轮年表是古气候信息的一个重要来源。由于某种原因,中国东部地区少有树轮研究工作。该文通过运引ARSTAN程序,建立并研究了山东境内沂山地区的树轮主年表(1750~1992)。树轮和气候要素的响应面分析得出沂山地区的树轮生长和温度降水呈非线性相关,因此使用传统方法重建单个气候因子是不合理的。通过响应函数和回归分析,5月至8月份的湿润指数(P/T)被确定为重建对象,该湿润指数值代表了温度和降水对树轮生长的共同影响,且相关性很高,远超过信度检验。利用线性回归方法,获得重建湿润指数的预报方程,用树木年轮年表重建了自1750年以来的沂山地区逐年5月~8月湿润指数的变化。分析了沂山地区湿润指数重建的可靠性。

Using tree-ring width chronology of Picea crassifolia in the middle region of Qilianshan Mountains, we studied the relationship between tree-ring and climate factors, and reconstructed spring precipitation and summer temperature in the middle region of Qilianshan Mountains. The results indicated that the tree-ring width is sensitive to spring precipitation, and summer temperature has influence of different degree on trees of different altitudes. High temperature of...

Using tree-ring width chronology of Picea crassifolia in the middle region of Qilianshan Mountains, we studied the relationship between tree-ring and climate factors, and reconstructed spring precipitation and summer temperature in the middle region of Qilianshan Mountains. The results indicated that the tree-ring width is sensitive to spring precipitation, and summer temperature has influence of different degree on trees of different altitudes. High temperature of summer is harm to tree growth. There is positive correlation between tree-ring width and spring precipitation. In spring, the rainy season has yet not arrived, and precipitation is deficient. The soil water becomes the limited factor to tree-ring growth. Little precipitation leads to the shortage of soil water, so the tree-ring width is narrow. Summer temperature has negative influence on the growth of tree~ring. In summer, monsoon brings precipitation to the middle region of Qilianshan Mountains. In general, the tree is satisfied with the water situation, but high temperature results in intense evaporation. By influencing soil water, summer temperature limits tree-ring growth. So high temperature of summer corresponds to the narrow tree-ring. But summer temperature cannot limit the tree growth in middle altitude. Because, in summer, the altitude of maximum precipitation in Qilianshan Mountains is just at 2 700-2 800 m. Enough rain reduces the negative effect that high temperature imposes on the tree growth. The reconstructed spring precipitation had the periods of 69- and 21-year, and it indicated that the middle region of Qilianshan Mountains was mainly in a humid state since A. D. 1770. Summer temperature had 2-year to 4-year periods. Now, this area is dry and warm, and it shows the warmer and drier tendency.

研究了祁连山中部不同海拔高度青海云杉的树轮宽度对气候因子的响应,重建了祁连山中部 230 a以来春季3~5月的降水和 170 a以来夏季6~8月的气温序列。结果分析发现,不同高度的云杉树轮生长对春季降水极为敏感,呈现显著正相关;对夏季气温的响应程度,各海拔高度却不相同,夏季气温对上、下限云杉生长有显著影响,但对于森林中部云杉作用并不明显,总体表现为负相关,夏季高温对树木生长不利。气候重建结果发现,祁连山中部的春季230 a以来经历了大幅度长阶段的干湿变化,存在明显的 69 a和 21a周期;170 a以来夏季气温变化频繁,存在明显的2~4a周期。目前,祁连山中部正处于相对干旱和温暖时期,呈现出向暖干方向发展的趋势。

Having analyzed the tree ring width and maximum latewood density of Pinus densata from west Sichuan, we obtained the different climate information from tree-ring width and maximum latewood density chronology. The growth of tree ring width was responded principally to the precipitation in May, which might be influenced by the activity of southwest monsoon, whereas the maximum latewood density reflected the summer temperature (June-September). According to the correlation relationship, a transfer function...

Having analyzed the tree ring width and maximum latewood density of Pinus densata from west Sichuan, we obtained the different climate information from tree-ring width and maximum latewood density chronology. The growth of tree ring width was responded principally to the precipitation in May, which might be influenced by the activity of southwest monsoon, whereas the maximum latewood density reflected the summer temperature (June-September). According to the correlation relationship, a transfer function had been used to reconstruct summer temperature for the study area. The explained variance of reconstruction is 51% (F = 52.099, p < 0.0001). In the reconstruction series: before the 1930s, the climate was relatively cold, and relatively warm from 1930 to 1960, and this trend was in accord with the cold-warm period of the last 100 years, west Sichuan. Compared with Chengdu, the warming break point in west Sichuan is 3 years ahead which shows Tibetan Plateau was more sensitive to temperature change. There was an evident summer warming signal after 1983. Although the last-100 running average of summer-temperature in the 1990s was the maximum, the running average of the early 1990s is below the average line and it was cold-summer; summer-drought presented in the late 1990s.

川西高原高山松树轮宽度及最大密度分析结果表明,最大密度年表和宽度年表中可提取的气候信息是不同的,在温暖、水分条件适中的地区,采用树木密度指标分析气候要素的变化是有效的途径。树轮宽度主要受5月降水影响,和西南季风活动有关;而最大密度主要指示了夏季(6 ̄9月)温度。利用转换函数重建了川西高原近百年来夏季(6 ̄9月)温度,重建序列的方差解释量为51%,(F=52.099,p<0.0001)。重建序列显示川西高原,30年代之前为偏冷期,30年代到60年代为偏暖期,与四川地区近百年的冷暖时期比较一致。与平原地区的成都相比,高原的升温转折点提前3年,表明高原地区对气温变化的响应更为敏感,川西高原地区可能是四川省气候变化的先兆地区。1983年以后川西高原地区夏季温度呈明显的上升趋势,20世纪90年代夏季温度的滑动平均为近百年的最大值,但在90年代初期仍处于均值线以下,表现为凉夏;90年代后半期表现为夏旱。

 
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