蔡秋芳^1,2,3,,
刘禹^1,2,3
1. 中国科学院地球环境研究所, 黄土与第四纪地质国家重点实验室, 陕西 西安 710061
2. 中国科学院第四纪科学与全球变化卓越创新中心, 陕西 西安 710061
3. 青岛海洋科学与技术试点国家实验室海陆气候环境变化开放工作室, 山东 青岛 266061

基金项目: 国家自然科学基金项目（批准号：41671212）、中国科学院（B类）战略性先导科技专项项目（批准号：XDB40010300）和中国科学院地球环境研究所黄土与第四纪地质国家重点实验室自主部署项目共同资助


详细信息

作者简介: 蔡秋芳, 女, 45岁, 研究员, 树木年轮与全球变化研究, E-mail: caiqf@ieecas.cn

中图分类号: P467;P532

收稿日期:2020-10-02
修回日期:2020-12-25
刊出日期:2021-03-30

Temperature variation of the past century in the Tongbai Mountain, Henan Province and its relationship with air-sea interaction

CAI Qiufang^1,2,3,,
LIU Yu^1,2,3
1. State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an 710061, Shaanxi
2. CAS Center for Excellence in Quaternary Science and Global Change, Chinese Academy of Sciences, Xi'an 710061, Shaanxi
3. Open Studio for Oceanic-Continental Climate and Environment Changes, Pilot National Laboratory for Marine Science and Technology(Qingdao), Qingdao 266061, Shandong


MSC: P467;P532

--> Received Date: 02 October 2020
Revised Date: 25 December 2020
Publish Date: 30 March 2021


摘要
摘要:全球气候变化已对人类生存环境、生态安全及社会可持续发展产生前所未有的影响。开展百-千年尺度的高分辨率气候重建可帮助我们有效预测气候变化的短期趋势。最低温变化对植被生长异常重要，然而目前来自我国北亚热带地区的相关研究还较为缺乏。在精确定年的基础上，本文建立了河南桐柏山1897~2013年的树轮宽度年表，分析了树轮宽度在过去百年的变化特征。在与现代气候观测要素进行相关分析的基础上，重建了过去百年来研究区5~7月平均最低气温变化历史。重建气温对观测时段记录（1957~2013年）的方差解释量达到48.90%。从发展趋势来看，研究区气温变化呈现"V"型特征，即1975年之前气候呈缓慢变冷过程，而后呈现变暖趋势。过去百年研究区存在一个持续了31年（1963~1993年）的低温期，2000~2013年为百年最暖。分析表明过去百年来我国北亚热带地区夏季气温变化在年与年代际尺度上基本同步，与亚（洲）-印（度洋）-太（平洋）交汇区海温变化密切相关，同时受到上一年北大西洋海盆尺度气候变化模态AMO（北大西洋年代际振荡）和NAO（北大西洋涛动）的影响。
关键词: 北亚热带/
树轮宽度/
气温重建/
海温/
AMO/
NAO

Abstract:Global climate change is having an unprecedented impact on human living condition, ecological security and social sustainable development. In order to effectively predict and better cope with future climate change, high resolution climate reconstructions from centennial-to millennial-scale are greatly needed. Located in the transition zone from warm temperate area to subtropics, the Tongbai mountain, stretching from northwest to southeast, is also the boundary between the Huaihe River and the Yangtze River Basins. Therefore, it has great scientific value to carry out palaeoclimatological studies in this area. High-resolution and well-dated tree rings have been used to investigate the climate-tree growth relationship and to reconstruct the history of climate change in the past few hundred years in subtropical China. However, summer minimum temperature, which is very important to vegetation growth, is less investigated in the north subtropics.
In the present work, based on 41 successfully cross-dated Pinus massoniana Lamb. tree-ring samples collected from the Tongbai Mountain(32.40°N, 113.28°E; 510 m a.s.l.), we developed a standard tree-ring-width chronology(TRW) spanning 1897~2013 A.D. Correlation analysis between TRW and instrumental climatic factors during 1957~2013 A.D. reveals that growing-season temperature, particularly May-July mean minimum temperature(Tmin_5~7), limits the radial growth of tree in the study area(r=-0.7, p < 0.01). We therefore reconstructed the history of Tmin_5~7 variation for the past century. The reconstructed temperature can explain 48.90% of the instrumental data. It varies between 19.24℃ and 21.90℃ during the reliable reconstructed period(1916~2013 A.D.), with a mean value of 20.50℃, and a standard deviation of 0.53℃. A slowly cooling trend before 1975 A.D. and a warming trend thereafter are seen in the reconstruction. In the past century, 1963~1993 A.D. is comparatively cold, and 2000~2013 A.D. is the warmest. Spatial correlation patterns reveal that Tmin_5~7 in the study area is closely linked to the sea surface temperature(SST) variations in the joining area of Asia and Indian-Pacific Ocean and the North Atlantic Ocean. Moreover, air-sea interaction in the North Atlantic Ocean(AMO, NAO) may also played an important role in modulating Tmin_5~7 variation over the last hundred years.
Key words:north subtropics/
tree-ring width/
temperature reconstruction/
sea surface temperature/
AMO/
NAO



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