Characteristics of modern atmospheric dust deposition in snow on the Penny Ice Cap, Baffin Island, Arctic Canada
We evaluated the concentration, size and distribution of insoluble dust microparticles in snowpits on the Penny Ice Cap (PIC), Baffin Island, to define (1) the characteristics of modern atmospheric dust deposition at the site, (2) the relative contributions of proximal and distal dust sources, and (...
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1998
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ftuninhampshire:oai:scholars.unh.edu:earthsci_facpub-1558 2023-05-15T14:57:10+02:00 Characteristics of modern atmospheric dust deposition in snow on the Penny Ice Cap, Baffin Island, Arctic Canada Zdanowicz, Christian Zielinski, Gregory A Wake, Cameron P 1998-01-01T08:00:00Z application/pdf https://scholars.unh.edu/earthsci_facpub/559 https://scholars.unh.edu/cgi/viewcontent.cgi?article=1558&context=earthsci_facpub unknown University of New Hampshire Scholars' Repository https://scholars.unh.edu/earthsci_facpub/559 https://scholars.unh.edu/cgi/viewcontent.cgi?article=1558&context=earthsci_facpub Copyright © Munksgaard, 1998 Earth Sciences Scholarship text 1998 ftuninhampshire 2023-01-30T21:35:33Z We evaluated the concentration, size and distribution of insoluble dust microparticles in snowpits on the Penny Ice Cap (PIC), Baffin Island, to define (1) the characteristics of modern atmospheric dust deposition at the site, (2) the relative contributions of proximal and distal dust sources, and (3) the effects of summer melting on depositional signals in snow. The mean concentration (143 mg kg−1), flux (4.8 mg cm2 yr−1) and diameter (2.3 mm) of dust deposited on the PIC are similar to those observed in remote Arctic sites such as central Greenland, implying that dust is primarily supplied through long-range transport from far-removed source regions (at least 102–103 km distant). There is evidence for two seasonal maxima of dust deposition, one in late winter-early spring and one in late summer-early fall, although seasonal signals can not always be resolved in the snowpack due to some post-depositional particle migration with summer melt. However, ice layers appear to limit the mobility of particles, thereby preserving valuable paleoclimatic information in the PIC ice core dust record at a multi-annual to decadal temporal resolution. Text Arctic Baffin Island Baffin Greenland Ice cap ice core Penny Ice Cap University of New Hampshire: Scholars Repository Arctic Baffin Island Canada Greenland Penny Ice Cap ENVELOPE(-66.214,-66.214,67.284,67.284) |
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University of New Hampshire: Scholars Repository |
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ftuninhampshire |
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description |
We evaluated the concentration, size and distribution of insoluble dust microparticles in snowpits on the Penny Ice Cap (PIC), Baffin Island, to define (1) the characteristics of modern atmospheric dust deposition at the site, (2) the relative contributions of proximal and distal dust sources, and (3) the effects of summer melting on depositional signals in snow. The mean concentration (143 mg kg−1), flux (4.8 mg cm2 yr−1) and diameter (2.3 mm) of dust deposited on the PIC are similar to those observed in remote Arctic sites such as central Greenland, implying that dust is primarily supplied through long-range transport from far-removed source regions (at least 102–103 km distant). There is evidence for two seasonal maxima of dust deposition, one in late winter-early spring and one in late summer-early fall, although seasonal signals can not always be resolved in the snowpack due to some post-depositional particle migration with summer melt. However, ice layers appear to limit the mobility of particles, thereby preserving valuable paleoclimatic information in the PIC ice core dust record at a multi-annual to decadal temporal resolution. |
format |
Text |
author |
Zdanowicz, Christian Zielinski, Gregory A Wake, Cameron P |
spellingShingle |
Zdanowicz, Christian Zielinski, Gregory A Wake, Cameron P Characteristics of modern atmospheric dust deposition in snow on the Penny Ice Cap, Baffin Island, Arctic Canada |
author_facet |
Zdanowicz, Christian Zielinski, Gregory A Wake, Cameron P |
author_sort |
Zdanowicz, Christian |
title |
Characteristics of modern atmospheric dust deposition in snow on the Penny Ice Cap, Baffin Island, Arctic Canada |
title_short |
Characteristics of modern atmospheric dust deposition in snow on the Penny Ice Cap, Baffin Island, Arctic Canada |
title_full |
Characteristics of modern atmospheric dust deposition in snow on the Penny Ice Cap, Baffin Island, Arctic Canada |
title_fullStr |
Characteristics of modern atmospheric dust deposition in snow on the Penny Ice Cap, Baffin Island, Arctic Canada |
title_full_unstemmed |
Characteristics of modern atmospheric dust deposition in snow on the Penny Ice Cap, Baffin Island, Arctic Canada |
title_sort |
characteristics of modern atmospheric dust deposition in snow on the penny ice cap, baffin island, arctic canada |
publisher |
University of New Hampshire Scholars' Repository |
publishDate |
1998 |
url |
https://scholars.unh.edu/earthsci_facpub/559 https://scholars.unh.edu/cgi/viewcontent.cgi?article=1558&context=earthsci_facpub |
long_lat |
ENVELOPE(-66.214,-66.214,67.284,67.284) |
geographic |
Arctic Baffin Island Canada Greenland Penny Ice Cap |
geographic_facet |
Arctic Baffin Island Canada Greenland Penny Ice Cap |
genre |
Arctic Baffin Island Baffin Greenland Ice cap ice core Penny Ice Cap |
genre_facet |
Arctic Baffin Island Baffin Greenland Ice cap ice core Penny Ice Cap |
op_source |
Earth Sciences Scholarship |
op_relation |
https://scholars.unh.edu/earthsci_facpub/559 https://scholars.unh.edu/cgi/viewcontent.cgi?article=1558&context=earthsci_facpub |
op_rights |
Copyright © Munksgaard, 1998 |
_version_ |
1766329259439161344 |