GSTDTAP  > 地球科学
DOI10.5194/acp-18-12345-2018
Historical black carbon deposition in the Canadian High Arctic: a > 250-year long ice-core record from Devon Island
Zdanowicz, Christian M.1; Proemse, Bernadette C.2; Edwards, Ross3,4; Wang Feiteng5; Hogan, Chad M.2; Kinnard, Christophe6; Fisher, David7
2018-08-27
发表期刊ATMOSPHERIC CHEMISTRY AND PHYSICS
ISSN1680-7316
EISSN1680-7324
出版年2018
卷号18期号:16页码:12345-12361
文章类型Article
语种英语
国家Sweden; Australia; USA; Peoples R China; Canada
英文摘要

Black carbon aerosol (BC), which is emitted from natural and anthropogenic sources (e.g., wildfires, coal burning), can contribute to magnify climate warming at high latitudes by darkening snow-and ice-covered surfaces, and subsequently lowering their albedo. Therefore, modeling the atmospheric transport and deposition of BC to the Arctic is important, and historical archives of BC accumulation in polar ice can help to validate such modeling efforts. Here we present a >250-year ice-core record of refractory BC (rBC) deposition on Devon ice cap, Canada, spanning the years from 1735 to 1992. This is the first such record ever developed from the Canadian Arctic. The estimated mean deposition flux of rBC on Devon ice cap for 1963-1990 is 0.2 mg m(-2) a(-1), which is at the low end of estimates from Greenland ice cores obtained using the same analytical method (similar to 0.1-4 mg m(-2) a(-1)). The Devon ice cap rBC record also differs from the Greenland records in that it shows only a modest increase in rBC deposition during the 20th century. In the Greenland records a pronounced rise in rBC is observed from the 1880s to the 1910s, which is largely attributed to midlatitude coal burning emissions. The deposition of contaminants such as sulfate and lead increased on Devon ice cap in the 20th century but no concomitant rise in rBC is recorded in the ice. Part of the difference with Greenland could be due to local factors such as melt-freeze cycles on Devon ice cap that may limit the detection sensitivity of rBC analyses in melt-impacted core samples, and wind scouring of winter snow at the coring site. Air back-trajectory analyses also suggest that Devon ice cap receives BC from more distant North American and Eurasian sources than Greenland, and aerosol mixing and removal during long-range transport over the Arctic Ocean likely masks some of the specific BC source-receptor relationships. Findings from this study suggest that there could be a large variability in BC aerosol deposition across the Arctic region arising from different transport patterns. This variability needs to be accounted for when estimating the large-scale albedo lowering effect of BC deposition on Arctic snow/ice.


领域地球科学
收录类别SCI-E
WOS记录号WOS:000442775100002
WOS关键词ATMOSPHERIC TRANSPORT ; NORTHERN-HEMISPHERE ; BAFFIN-ISLAND ; FIRE HISTORY ; SNOW ; CAP ; SULFATE ; LOMONOSOVFONNA ; AEROSOLS ; NUNAVUT
WOS类目Environmental Sciences ; Meteorology & Atmospheric Sciences
WOS研究方向Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
引用统计
文献类型期刊论文
条目标识符http://119.78.100.173/C666/handle/2XK7JSWQ/30403
专题地球科学
作者单位1.Uppsala Univ, Dept Earth Sci, S-75236 Uppsala, Sweden;
2.Univ Tasmania, Sch Biol Sci, Hobart, Tas 7001, Australia;
3.Curtin Univ, Phys & Astron, Perth, WA 6102, Australia;
4.Univ Wisconsin, Dept Civil & Environm Engn, Madison, WI 53706 USA;
5.Chinese Acad Sci, Cold & Arid Reg Environm & Engn Res Inst, Lanzhou, Gansu, Peoples R China;
6.Univ Quebec Trois Rivieres, Dept Sci Environm, Trois Rivieres, PQ G9A 5H7, Canada;
7.Univ Ottawa, Dept Earth Sci, 120 Univ, Ottawa, ON K1N 6N5, Canada
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GB/T 7714
Zdanowicz, Christian M.,Proemse, Bernadette C.,Edwards, Ross,et al. Historical black carbon deposition in the Canadian High Arctic: a > 250-year long ice-core record from Devon Island[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2018,18(16):12345-12361.
APA Zdanowicz, Christian M..,Proemse, Bernadette C..,Edwards, Ross.,Wang Feiteng.,Hogan, Chad M..,...&Fisher, David.(2018).Historical black carbon deposition in the Canadian High Arctic: a > 250-year long ice-core record from Devon Island.ATMOSPHERIC CHEMISTRY AND PHYSICS,18(16),12345-12361.
MLA Zdanowicz, Christian M.,et al."Historical black carbon deposition in the Canadian High Arctic: a > 250-year long ice-core record from Devon Island".ATMOSPHERIC CHEMISTRY AND PHYSICS 18.16(2018):12345-12361.
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