不同波段树轮图像对气候要素的响应  

Response of tree-ring images in different bands to climatic factors

作　　者：苏绮华 郑永宏[1] 胡正生 廖慧慧 陆呈瑜 SU Qihua;ZHENG Yonghong;HU Zhengsheng;LIAO Huihui;LU Chengyu(School of Resource Environmental Sciences,Wuhan University,Wuhan 430079,China)

机构地区：[1]武汉大学资源与环境科学学院,武汉430079

出　　处：《应用生态学报》2025年第2期403-410,共8页Chinese Journal of Applied Ecology

基　　金：国家自然科学基金区域创新发展联合基金重点项目(U23A2021)资助。

摘　　要：为深入挖掘树轮蕴含的气候信号,本文以神农架地区金猴岭(海拔2564 m)和太子垭(海拔2494 m)的巴山冷杉为研究对象,使用CooRecorder软件提取树轮红光强度、绿光强度和蓝光强度,采用Age-dependent spline进行巴山冷杉树轮红光强度、绿光强度和蓝光强度的生长趋势拟合并建立年表,分析树轮年表与1953-2020年气候要素的相关关系。结果表明:金猴岭巴山冷杉树轮早材红、绿、蓝3个波段与6月平均最高气温、平均气温和平均最低气温呈显著正相关;太子垭巴山冷杉树轮早材3个波段与6月平均最高气温呈显著正相关,与3月降水呈显著负相关。金猴岭巴山冷杉树轮晚材红、绿、蓝3个波段与6、7、8月平均最高气温,7、8月平均气温和平均最低气温呈显著正相关,与7月降水量呈显著负相关;太子垭巴山冷杉树轮晚材红、绿、蓝3个波段与8月平均最高气温、平均气温和平均最低气温呈显著正相关,与8月降水呈显著负相关。树轮红、绿、蓝3个波段对气候要素的响应多具有随波长变化而呈现规律性变化的趋势,但这种变化趋势并不一致。To deeply explore the climate signals contained in tree rings, we extracted red, green, and blue light intensities from the tree rings of Abies fargesii in the Jinhouling(altitude: 2564 m) and Taiziya(altitude: 2494 m) areas of Shennongjia, using the CooRecorder software. With an age-dependent spline, we fitted the growth trends, established chronologies, and analyzed the correlation between tree ring chronology and climate factors from 1953 to 2020. The results showed that the red, green, and blue light intensities of earlywood of trees from Jinhouling showed a significant positive correlation with mean maximum temperature, mean temperature, and mean minimum temperature in June. In Taiziya, the red, green, and blue intensities of earlywood was significantly positively correlated with the mean maximum temperature in June and significantly negatively correlated with March precipitation. In Jinhouling, latewood red, green, and blue light intensities showed significant positive correlation with mean maximum temperature of June, July and August, as well as with mean temperature and mean minimum temperature in July and August, and significant negative correlations with July precipitation. In Taiziya, latewood red, green and blue light intensities were significantly positively correlated with mean maximum temperature, mean temperature, and mean minimum temperature in August and negatively correlated with August precipitation. The responses of the red, green, and blue bands of tree rings to climate factors often showed a regular trend of variation with wavelength changes, but the trends varied across different bands.

关 键 词：巴山冷杉 树轮 波段 气候响应 

分 类 号：P46[天文地球—大气科学及气象学]