[1]崔英方,赵 侃,赵 彬,等.中世纪暖期和现代暖期中国季风降水时空模式及其机制[J].南京师范大学学报(自然科学版),2019,42(04):145-152.[doi:10.3969/j.issn.1001-4616.2019.04.020]
　Cui Yingfang,Zhao Kan,Zhao Bin,et al.Spatiotemporal Model and Mechanism of Monsoon Rainfall in ChinaDuring the Medieval Warm Period and the Current Warm Period[J].Journal of Nanjing Normal University(Natural Science Edition),2019,42(04):145-152.[doi:10.3969/j.issn.1001-4616.2019.04.020]
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中世纪暖期和现代暖期中国季风降水时空模式及其机制()
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《南京师范大学学报》（自然科学版）[ISSN:1001-4616/CN:32-1239/N]

卷:
第42卷
期数:
2019年04期
页码:
145-152
栏目:
·地理学·
出版日期:
2019-12-30

文章信息/Info

Title:
Spatiotemporal Model and Mechanism of Monsoon Rainfall in ChinaDuring the Medieval Warm Period and the Current Warm Period
文章编号:
1001-4616(2019)04-0145-08
作者:
崔英方1; 2; 赵 侃2; 赵 彬2; 王 权2; 汪永进2
(1.南京旅游职业学院旅游管理学院,江苏 南京 211100)(2.南京师范大学地理科学学院,江苏 南京 210023)
Author(s):
Cui Yingfang1; 2; Zhao Kan2; Zhao Bin2; Wang Quan2; Wang Yongjin2
(1.School of Tourism Management,Nanjing Institute of Tourism and Hospitality,Nanjing 211100,China)(2.School of Geography,Nanjing Normal University,Nanjing 210023,China)
关键词:
中世纪暖期; 现代暖期; 氧同位素; 降水; 水汽输送
Keywords:
medieval warm period; current warm period; oxygen isotope(δ18O); rainfall; water vapor transport
分类号:
K903
DOI:
10.3969/j.issn.1001-4616.2019.04.020
文献标志码:
A
摘要:
IPCC第五次评估报告认为中世纪暖期(950—1250 A.D.)和现代暖期(20世纪增温)存在具有高可信度. 气象观测结果显示20世纪中期以来的显著增温时期,中国降水变化呈现典型的“南涝北旱”两极模式. 然而,这一模式与中世纪暖期代用指标重建降水所揭示的“南干北湿”模式存在显著差异,且这一差异的动力学机制亦不明确. 继承大气降水氧同位素(δ18O)的中国石笋δ18O记录是描述水循环演变历史信息的理想天然示踪剂. 本文将北京石花洞(中国北方)和贵州董哥洞(中国南
Abstract:
The Fifth Assessment Report of the Intergovernmental Panel on Climate Change suggests that the existence of Medieval Warm Period(MWP,950-1250 A.D.)and Current Warm Period(CWP,warming in the twentieth century)is very likely. In CWP,annual precipitation anomalies over eastern China are characterized by a north-south dipole pattern,referred to as the“southern flooding and northern drought”pattern(SF/ND). However,spatial pattern of rainfall during MWP shows a“southern dry and northern wet”mode,revealed by paleoclimate reconstructions. Therefore,the mechanism of precipitation variations during the warm periods remains unclear. Inherited from the δ18O signal of precipitation,Chinese stalagmite δ18O records are ideal natural tracers for describing the history of the water cycle. Here,this paper compares stalagmite δ18O records from Shihua Cave,North China with δ18O records from Dongge Cave,South China,to explore the spatiotemporal model of rainfall and its mechanism in late Holocene. In MWP,negative δ18O values in northern China and positive δ18O values in southern China indicate that strong ASM intensity and associated northward progress of the rainband delivered more remote moisture from Indian Ocean to northern China and less to southern China. During the CWP,stalagmite δ18O values show a notable positive trend in both Shihua Cave and Dongge Cave,suggesting that weak ASM intensity and associated southward withdraw of the rainband resulted in the SF/ND pattern. Furthermore,local water vapor from the Pacific Ocean probably contributed to increased rainfall in southern China. The North(dry)-South(wet)pattern during the CWP inversely similar to the spatial pattern during the MWP,probably suggesting different impacts of natural and anthropogenic forcing on precipitation distribution.

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备注/Memo

备注/Memo:
收稿日期:2019-01-25.
基金项目:国家自然科学基金(41702180)、江苏省高校自然科学研究面上项目(16KJD170002).
通讯联系人:赵侃,博士,副教授,研究方向:全球气候变化. E-mail:09371@njnu.edu.cn
更新日期/Last Update: 2019-12-31