Arid
DOI10.1016/j.palaeo.2015.02.029
Middle-late Holocene Caribbean aridity inferred from foraminifera and elemental data in sediment cores from two Cuban lagoons
Gregory, Braden R. B.1; Peros, Matthew2; Reinhardt, Eduard G.1; Donnelly, Jeffrey P.3
通讯作者Gregory, Braden R. B.
来源期刊PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
ISSN0031-0182
EISSN1872-616X
出版年2015
卷号426页码:229-241
英文摘要

Coastal lagoons are rarely used as paleoclimate archives because of their complex geomorphic histories, which can be affected by both climate and sea-level change. Combined foraminiferal and XRF element analysis of sediment cores from Punta de Cartas and Playa Bailen, Cuba, isolated the effects of climate change (wet vs dry) on the lagoon environments. Foraminiferal assemblages from both Punta de Cartas and Playa Bailen show increasing diversity over the past 4000 yr BP, with a prominent increase at similar to 1400-1100 yr BP. Assemblages were initially dominated by Ammonia spp. (e.g., Ammonia tepida) and Elphidium spp. (e.g., Elphidium excavatum), indicating brackish conditions, but increased miliolid species (e.g., Triloculina spp. Quinqueloculina spp.), indicate a shift to more marine conditions up-core. Correspondingly, terrigenous input to the lagoon (Fe, Ti, Ti/Ca and K) declined over the past 4000 yr BP with a flexion at similar to 1200-1100 yr BP that is likely a consequence of decreasing precipitation. Fe, Ti and K have been used as proxies for detrital erosion and transport rates in tropical and subtropical basins, with greater input during wet periods, but have rarely been applied to shallow lagoon systems. Coincident changes in the XRF and foraminiferal data indicate decreased freshwater input to the lagoon and support an inference for the onset of drier climate conditions. Similar temporal patterns in the foraminifera and XRF records from the two lagoons, which are similar to 10 km apart, suggest a regional climate influence, with increasingly arid conditions developing since the middle-Holocene (4 kyr BP). A pronounced drying over the last similar to 1200 years agrees with other climate records from the Caribbean. (C) 2015 Elsevier B.V. All rights reserved.


英文关键词X-ray fluorescence Foraminifera Coastal lagoon Cuba Caribbean Paleoclimate Holocene
类型Article
语种英语
国家Canada ; USA
收录类别SCI-E
WOS记录号WOS:000353603000019
WOS关键词YUCATAN PENINSULA ; BENTHIC FORAMINIFERA ; RAINFALL VARIABILITY ; CLIMATE VARIABILITY ; TROPICAL ATLANTIC ; LAKE-SEDIMENTS ; BULK-SEDIMENT ; FLORIDA BAY ; EL-NINO ; RECORD
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/2XILL650/189505
作者单位1.McMaster Univ, Sch Geog & Earth Sci, Hamilton, ON L8S 4M1, Canada;
2.Bishops Univ, Dept Environm Studies & Geog, Lennoxville, PQ J1M 1Z7, Canada;
3.Woods Hole Oceanog Inst, Coastal Syst Grp, Woods Hole, MA 02543 USA
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Gregory, Braden R. B.,Peros, Matthew,Reinhardt, Eduard G.,et al. Middle-late Holocene Caribbean aridity inferred from foraminifera and elemental data in sediment cores from two Cuban lagoons[J],2015,426:229-241.
APA Gregory, Braden R. B.,Peros, Matthew,Reinhardt, Eduard G.,&Donnelly, Jeffrey P..(2015).Middle-late Holocene Caribbean aridity inferred from foraminifera and elemental data in sediment cores from two Cuban lagoons.PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,426,229-241.
MLA Gregory, Braden R. B.,et al."Middle-late Holocene Caribbean aridity inferred from foraminifera and elemental data in sediment cores from two Cuban lagoons".PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY 426(2015):229-241.
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