Reconstructing late Holocene relative sea-level changes at the Magdalen Islands (Gulf of St. Lawrence, Canada) using multi-proxy analyses

被引:21
作者
Barnett, Robert L. [1 ,2 ,3 ]
Bernatchez, Pascal [1 ]
Garneau, Michelle [2 ,3 ]
Juneau, Marie-Noelle [1 ]
机构
[1] Univ Quebec, Res Chair Coastal Geosci, Dept Biol Chim & Geog, Ctr Etud Nord & Quebec Ocean, 300 Allee Ursulines,CP 3300, Rimouski, PQ G5L 3A1, Canada
[2] Univ Quebec, Dept Geog, 201 Pavillon President Kennedy, Montreal, PQ H2X 3Y7, Canada
[3] Univ Quebec, Geotop Res Ctr, 201 Pavillon President Kennedy, Montreal, PQ H2X 3Y7, Canada
关键词
foraminifera; late Holocene; Magdalen Islands; proxy records; sea level; testate amoebae; CRUSTAL MOVEMENTS; ATLANTIC COAST; RISE; ACCELERATION; DEGLACIATION; CALIBRATION; INDICATORS; MODEL; PALEOECOLOGY; STRATIGRAPHY;
D O I
10.1002/jqs.2931
中图分类号
P9 [自然地理学];
学科分类号
0705 ; 070501 ;
摘要
Proxy records of late Holocene relative sea-level changes are important for our understanding of mechanisms that drive contemporary sea-level trends. In the Gulf of Saint Lawrence (eastern Canada), the Magdalen Islands currently experience higher than global average rates of relative sea-level rise. This article presents original reconstruction data of sea-level changes from the Magdalen Islands over the past few millennia collected from a variety of coastal deposits and proxy records including salt-marsh foraminifera, testate amoebae and plant macrofossils. Reconstructed late Holocene relative sea-level trends are between 1.3 and 2.0mm a(-1) for the past 2000 years. When combined with contemporaneous trends in tide-gauge data from Cap-aux-Meules (Magdalen Islands), multi-proxy data show acceleration in the rate of relative sea-level rise to over 4mm a(-1) during the 20th century. This signal corresponds to similar inflexions also registered in salt marshes and tide-gauge data along the east coast of North America. Copyright (C) 2017 John Wiley & Sons, Ltd.
引用
收藏
页码:380 / 395
页数:16
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