Past Climatic Conditions for Bokoni at Buffelskloof, Mpumalanga, Using δ13C Analysis of Prunus africana and Pittosporum viridiflorum Tree Rings

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY Accounts of Chemical Research Pub Date : 2019-11-13 DOI:10.1163/21915784-20190015

M. Schoeman, B. Aub, J. Burrows, G. Hall, S. Woodborne

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引用次数: 4

Abstract

Terrace farming flourished in Bokoni from the sixteenth century CE onwards. Bokoni farmers’ resilience strategies, however, were severely tested during the third occupation phase (approx. 1780 to 1840 CE), when the mfecane destabilised the region. In order to reflect on the environmental conditions Bokoni farmers faced in this period the stable carbon isotope proxy rainfall records from Prunus africana and Pittosporum viridiflorum specimens that grew on the Buffelskloof site were studied. Because the Buffelskloof records postdate the occupation, the records are compared with a 1000-year Adansonia digitata rainfall proxy record from the Pafuri region. Deviations between the two are attributed to the juvenile effect, and when these are discounted there is a significant correlation between local and regional rainfall records. This suggests common large-scale synoptic forcing underlies regional rainfall variability, and the decadal-scale variability in the Adansonia digitata records indicates extremely dry conditions in the 1780 to 1840 CE period.

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普马兰加Buffelskloof Bokoni地区过去气候条件——基于非洲李和绿花Pittosporum viridiflorum年轮的δ13C分析

从公元16世纪起，博科尼的梯田农业蓬勃发展。然而，在第三个占领阶段（约公元1780年至1840年），当mfecane破坏了该地区的稳定时，博科尼农民的复原策略受到了严峻考验。为了反映博科尼农民在这一时期面临的环境条件，研究了生长在Buffelskloof遗址上的非洲李和海桐标本的稳定碳同位素替代降雨记录。由于Buffelskloof的记录晚于占领日期，因此将这些记录与帕夫里地区1000年的Adansonia digitata降雨量代理记录进行了比较。两者之间的偏差归因于幼年效应，如果不考虑这些偏差，则当地和区域降雨记录之间存在显著相关性。这表明常见的大规模天气强迫是区域降雨变化的基础，而Adansonia digitata记录中的十年尺度变化表明1780至1840 CE期间的极端干旱条件。

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.