干旱区生态环境知识资源中心(Arid): Nearshore paleoceanogaphic conditions through the Holocene: Shell carbonate from archaeological sites of the Atacama Desert coast

Arid

DOI	10.1016/j.palaeo.2020.110090
	Nearshore paleoceanogaphic conditions through the Holocene: Shell carbonate from archaeological sites of the Atacama Desert coast
	Flores, Carola; Broitman, Bernardo R.
通讯作者	Flores, C (corresponding author), Univ Catolica Norte, Fac Ciencias Mar, Ctr Estudios Avanzados Zonas Aridas CEAZA, Ossandon 877, Coquimbo, Chile.
来源期刊	PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
ISSN	0031-0182
EISSN	1872-616X
出版年	2021
卷号	562
英文摘要	From the southern coast of Peru to the central-north coast of Chile (18 degrees-31 degrees S) previous evidence suggests that wide variations in sea surface temperature (SST) over the Holocene may be associated with changes in coastal upwelling regimes along the region. Support for spatial contrasts and similarities in oceanographic dynamics comes from earlier work at both extremes of the region. Using a 12 kyr record derived from shell midden archaeological sites around Taltal Chile (25 degrees S), we show that changes in the region are not necessarily consistent with a simple latitudinal gradient. Using delta C-13 and delta O-18 isotopic records from archaeological carbonate shells of the keyhole limpet Fissurella maxima we find that cold SST during the Early Holocene was associated with more negative delta C-13 values in agreement with observations from southern Peru. Warmer waters during the beginning of the Middle Holocene, had positive delta C-13 values, differentiating them from southern Peru and central-north Chile records. The rest of the Middle Holocene showed a decreasing SST accompanied by negative delta C-13 values, and after 4000 cal yr BP, the Late Holocene showed a progressive increase in SST and positive delta C-13 values. Finally, modern carbonate shells of F. maxima indicate a situation not observed throughout the Holocene period: warm SST is associated with negative delta C-13 values, in line with results on modern shells from southern Peru and modern oceanographic patterns that indicate an intensification of coastal upwelling with events of warm water intrusion. Our results show that the southern coast of the Atacama Desert experienced important fluctuations in SST and upwelling conditions during the Holocene, which may have affected the distribution of nearshore fisheries along the Northern Coast of Chile.
英文关键词	Fissurella maxima shell Isotopic analysis delta O-18 delta C-13 Coastal upwelling Shell carbonate Sea surface temperature
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000604584600025
WOS关键词	HUMBOLDT CURRENT SYSTEM ; SEA-SURFACE TEMPERATURE ; SANTA-CRUZ ISLAND ; MIDDLE HOLOCENE ; SOUTHEASTERN PACIFIC ; HYPERARID COAST ; OCEANIC UPTAKE ; RESERVOIR AGE ; CHILE ; PRODUCTIVITY
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary ; Paleontology
WOS研究方向	Physical Geography ; Geology ; Paleontology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/348082
作者单位	[Flores, Carola] Univ Catolica Norte, Fac Ciencias Mar, Ctr Estudios Avanzados Zonas Aridas CEAZA, Ossandon 877, Coquimbo, Chile; [Broitman, Bernardo R.] Univ Adolfo Ibanez, Fac Artes Liberales, Dept Ciencias, Vina Del Mar, Chile; [Broitman, Bernardo R.] Univ Adolfo Ibanez, Bioengn Innovat Ctr, Fac Ingn & Ciencias, Vina Del Mar, Chile
推荐引用方式 GB/T 7714	Flores, Carola,Broitman, Bernardo R.. Nearshore paleoceanogaphic conditions through the Holocene: Shell carbonate from archaeological sites of the Atacama Desert coast[J],2021,562.
APA	Flores, Carola,&Broitman, Bernardo R..(2021).Nearshore paleoceanogaphic conditions through the Holocene: Shell carbonate from archaeological sites of the Atacama Desert coast.PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,562.
MLA	Flores, Carola,et al."Nearshore paleoceanogaphic conditions through the Holocene: Shell carbonate from archaeological sites of the Atacama Desert coast".PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY 562(2021).