气候变化领域集成服务门户(CCPortal): Holocene break-up and reestablishment of the Petermann Ice Tongue; Northwest Greenland

CCPortal

DOI	10.1016/j.quascirev.2019.06.023
	Holocene break-up and reestablishment of the Petermann Ice Tongue; Northwest Greenland
	Reilly B.T.; Stoner J.S.; Mix A.C.; Walczak M.H.; Jennings A.; Jakobsson M.; Dyke L.; Glueder A.; Nicholls K.; Hogan K.A.; Mayer L.A.; Hatfield R.G.; Albert S.; Marcott S.; Fallon S.; Cheseby M.
发表日期	2019
ISSN	0277-3791
起始页码	322
结束页码	342
卷号	218
英文摘要	Over the last decade, two major calving events of the Petermann Ice Tongue in Northwest Greenland have led to speculation on its future stability and contribution to further Greenland Ice Sheet mass loss. However, it has been unclear if these events are anomalous or typical within the context of limited historical observations. We extend the historical record of the floating ice tongue using the stratigraphy of Petermann Fjord sediments to provide a longer-term perspective. Computed tomography (CT) scans, X-Ray Fluorescence (XRF) scans, Ice-Rafted Debris (IRD) counts, and the magnetic properties of specific particle size fractions constrain changes in depositional processes and sediment sources at our core sites, allowing for reconstructions of past behavior of the Petermann Ice Tongue. Radiocarbon dating of foraminifera, 210Pb, and paleomagnetic secular variation (PSV) provide age control and help to address uncertainties in radiocarbon reservoir ages. A floating ice tongue in Petermann Fjord formed in late glacial time as Petermann Glacier retreated from an advanced grounded position. This paleo-ice tongue broke-up during the early Holocene when high northern latitude summer insolation was higher than present. After gradual regrowth of the ice tongue associated with regional cooling, the ice tongue reached its historical extent only within the last millennium. Little or no ice tongue was present for nearly 5000 years during the middle Holocene, when decadal mean regional temperatures are estimated to be 0.8–2.9 °C higher than preindustrial (1750 CE) and seasonal sea-ice in the Lincoln Sea was reduced. This pre-historical behavior shows that recent anthropogenic warming may already be in the range of ice tongue instability and future projected warming increases the risk of ice tongue break-up by the mid-21st Century. © 2019 Elsevier Ltd
英文关键词	Glaciology; Greenland Ice Sheet; Holocene; Ice shelf; Paleomagnetic secular variation; Paleomagnetism; Petermann Glacier; Petermann Ice Tongue; Sedimentology-marine sediment cores
语种	英语
scopus关键词	Bridge piers; Computerized tomography; Geomagnetism; Glaciers; Lead compounds; Particle size; Sea ice; Stratigraphy; Submarine geology; Glaciology; Greenland Ice Sheet; Holocenes; Ice shelves; Marine sediments; Paleomagnetic secular variations; Paleomagnetism; Petermann Ice Tongue; Sediments; anthropogenic effect; cement (sedimentology); cooling; fjord; floating ice; glaciology; historical record; Holocene; ice breakup; ice shelf; late glacial; marine sediment; paleomagnetism; secular variation; sediment core; Arctic; Arctic Ocean; Greenland; Greenland Ice Sheet; Lincoln Sea; Petermann Glacier; Foraminifera
来源期刊	Quaternary Science Reviews
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/151843
作者单位	College of Earth, Ocean, and Atmospheric Sciences, Oregon State University, Corvallis, OR 97331, United States; Institute of Arctic and Alpine Research, University of Colorado, Boulder, CO 80309-0450, United States; Department of Geological Sciences, Stockholm University, Stockholm, 106 91, Sweden; Geological Survey of Denmark and Greenland, Department of Glaciology and Climate, Øster Voldgade 10, København K, DK-1350, Denmark; British Antarctic Survey, Natural Environmental Research Council, High Cross, Madingley Road, Cambridge, CB3 0ET, United Kingdom; Center for Coastal and Ocean Mapping, University of New HampshireNH 03824, United States; Department of Geoscience, University of Wisconsin-Madison, Madison, WI 53706, United States; Radiocarbon Laboratory, Research School of Earth Sciences, The Australian National University, Canberra, ACT, Australia
推荐引用方式 GB/T 7714	Reilly B.T.,Stoner J.S.,Mix A.C.,et al. Holocene break-up and reestablishment of the Petermann Ice Tongue; Northwest Greenland[J],2019,218.
APA	Reilly B.T..,Stoner J.S..,Mix A.C..,Walczak M.H..,Jennings A..,...&Cheseby M..(2019).Holocene break-up and reestablishment of the Petermann Ice Tongue; Northwest Greenland.Quaternary Science Reviews,218.
MLA	Reilly B.T.,et al."Holocene break-up and reestablishment of the Petermann Ice Tongue; Northwest Greenland".Quaternary Science Reviews 218(2019).