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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。
Tree ring chronology is an important source of paleoclimate information in China, especially in the northwestern part of China. For some reason, there are few tree-ring research efforts in eastern China. Through the introduction of ARSTAN program, this paper establishes and studies the tree-ring master chronology (1750 ~ 1992) in Yishan area of Shandong Province. Response surface analysis of tree rings and climatic elements shows that the tree-ring growth and temperature precipitation are non-linear in Yishan, so it is unreasonable to reconstruct individual climatic factors using traditional methods. Through the response function and regression analysis, the wetness index (P / T) from May to August was determined as the reconstruction target. The value of wetness index represents the common influence of temperature and precipitation on the growth of tree rings, and the correlation is very high. Exceed reliability test. Using the linear regression method, the forecasting equation of wetting index was obtained. The change of wetness index of Yishan area from May to August of each year was reconstructed from tree ring year list. The reliability of the wetness index reconstruction in Yishan area was analyzed.