气候变化领域集成服务门户(CCPortal): A 125-year record of climate and chemistry variability at the Pine Island Glacier ice divide, Antarctica

CCPortal

DOI	10.5194/tc-11-1537-2017
	A 125-year record of climate and chemistry variability at the Pine Island Glacier ice divide, Antarctica
	Schwanck F.; Simões J.C.; Handley M.; Mayewski P.A.; Auger J.D.; Bernardo R.T.; Aquino F.E.
发表日期	2017
ISSN	19940416
卷号	11 期号:4
英文摘要	The Mount Johns (MJ) ice core (79°550 S; 94°230 W) was drilled near the Pine Island Glacier ice divide on the West Antarctic Ice Sheet during the 2008-2009 austral summer, to a depth of 92.26 m. The upper 45m of the record covers approximately 125 years (1883-2008), showing marked seasonal variability. Trace element concentrations in 2137 samples were determined using inductively coupled plasma mass spectrometry. In this study, we reconstruct mineral dust and sea salt aerosol transport and investigate the influence of climate variables on the elemental concentrations at the MJ site. The ice core record reflects changes in emissions as well as atmospheric circulation and transport processes. Our trajectory analysis shows distinct seasonality, with strong westerly transport in the winter months and secondary northeasterly transport in the summer. During summer months, the trajectories present slow-moving (short) transport and are more locally influenced than in other seasons. Finally, our reanalysis correlations with trace element suggest that marine-derived trace element concentrations are strongly influenced by sea ice concentration and sea surface temperature anomalies. The results show that seasonal elemental concentration maxima in sea salt elements correlate well with the sea ice concentration winter maxima in the west Amundsen and Ross seas. Lastly, we observed an increased concentration of marine aerosols when sea surface temperature decreased. © 2017 Author(s).
学科领域	aerosol composition; atmospheric chemistry; atmospheric circulation; atmospheric transport; climate change; concentration (composition); dust; mineral; sea ice; seasonal variation; temperature anomaly; Amundsen Sea; Antarctic Ice Sheet; Antarctica; Pine Island Glacier; Ross Sea; Southern Ocean; West Antarctica
语种	英语
scopus关键词	aerosol composition; atmospheric chemistry; atmospheric circulation; atmospheric transport; climate change; concentration (composition); dust; mineral; sea ice; seasonal variation; temperature anomaly; Amundsen Sea; Antarctic Ice Sheet; Antarctica; Pine Island Glacier; Ross Sea; Southern Ocean; West Antarctica
来源期刊	Cryosphere
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/119377
作者单位	Centro Polar e Climático, Universidade Federal Do Rio Grande Do sul (UFRGS), Porto Alegre, 91540-000, Brazil; Climate Change Institute, University of Maine, Orono, ME 04469, United States
推荐引用方式 GB/T 7714	Schwanck F.,Simões J.C.,Handley M.,et al. A 125-year record of climate and chemistry variability at the Pine Island Glacier ice divide, Antarctica[J],2017,11(4).
APA	Schwanck F..,Simões J.C..,Handley M..,Mayewski P.A..,Auger J.D..,...&Aquino F.E..(2017).A 125-year record of climate and chemistry variability at the Pine Island Glacier ice divide, Antarctica.Cryosphere,11(4).
MLA	Schwanck F.,et al."A 125-year record of climate and chemistry variability at the Pine Island Glacier ice divide, Antarctica".Cryosphere 11.4(2017).