气候变化领域集成服务门户(CCPortal): AMS radiocarbon dates and pollen analysis of ODP Hole 175-1078C

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DOI	https://doi.org/10.1594/PANGAEA.726887
	AMS radiocarbon dates and pollen analysis of ODP Hole 175-1078C
	Dupont; Lydie M; Behling; Hermann; Kim; Jung-Hyun
发布日期	2008-07-26
数据集类型	dataset
英文简介	ODP Site 1078 situated under the coast of Angola provides the first record of the vegetation history for Angola. The upper 11 m of the core covers the past 30 thousand years, which has been analysed palynologically in decadal to centennial resolution. Alkenone sea surface temperature estimates were analysed in centennial resolution. We studied sea surface temperatures and vegetation development during full glacial, deglacial, and interglacial conditions. During the glacial the vegetation in Angola was very open consisting of grass and heath lands, deserts and semi-deserts, which suggests a cool and dry climate. A change to warmer and more humid conditions is indicated by forest expansion starting in step with the earliest temperature rise in Antarctica, 22 thousand years ago. We infer that around the period of Heinrich Event 1, a northward excursion of the Angola Benguela Front and the Congo Air Boundary resulted in cool sea surface temperatures but rain forest remained present in the northern lowlands of Angola. Rain forest and dry forest area increase 15 thousand years ago. During the Holocene, dry forests and Miombo woodlands expanded. Also in Angola globally recognised climate changes at 8 thousand and 4 thousand years ago had an impact on the vegetation. During the past 2 thousand years, savannah vegetation became dominant.
空间范围	Latitude: -11.920770 * Longitude: 13.400250
时间范围	1997-09-03T18:10:00 - 1997-09-04T06:05:00
语种	英语
国家	国际
学科大类	气候变化
学科子类	气候变化
文献类型	数据集
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/226940
推荐引用方式 GB/T 7714	Dupont,Lydie M,Behling,et al. AMS radiocarbon dates and pollen analysis of ODP Hole 175-1078C.2008-07-26.https://doi.org/10.1594/PANGAEA.726887.