Recent climate anomalies and their impact on snow chemistry at South Pole, 1987 - 1994
Three 2-m deep snowpits sampled at South Pole in 1994 provide detailed (2-cm resolution) profiles of the concentrations of soluble ionic species for the period 1987 - 1994. The most prominent feature is a large concentration spike of SO4 = in snow deposited in 1992 reflecting fallout from the erupti...
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ftuninhampshire:oai:scholars.unh.edu:earthsci_facpub-1177 2023-05-15T13:41:56+02:00 Recent climate anomalies and their impact on snow chemistry at South Pole, 1987 - 1994 Dibb, Jack E. Whitlow, Sallie I 1996-05-15T07:00:00Z application/pdf https://scholars.unh.edu/earthsci_facpub/178 https://scholars.unh.edu/cgi/viewcontent.cgi?article=1177&context=earthsci_facpub unknown University of New Hampshire Scholars' Repository https://scholars.unh.edu/earthsci_facpub/178 https://scholars.unh.edu/cgi/viewcontent.cgi?article=1177&context=earthsci_facpub Copyright 1996 by the American Geophysical Union. Earth Sciences Scholarship Atmospheric Sciences text 1996 ftuninhampshire 2023-01-30T21:34:30Z Three 2-m deep snowpits sampled at South Pole in 1994 provide detailed (2-cm resolution) profiles of the concentrations of soluble ionic species for the period 1987 - 1994. The most prominent feature is a large concentration spike of SO4 = in snow deposited in 1992 reflecting fallout from the eruptions of Pinatubo and Hudson in 1991. Concentrations of MSA and values of the MSA/(non-sea-salt SO4 =) ratio are elevated for about three years centered on the prominent volcanic signal. These changes appear to be due to the extended 1991 - 1993 El Nino. The overlapping effects of the volcanic eruptions and El Nino circulation preclude partitioning the enhanced deposition of SO4 = into volcanic and biogenic fractions. Nitrate concentration profiles show no relation to the severity of O3 depletion in the Antarctic stratosphere during the period of record. Rather, the profiles show a progressive decline of the annual peak concentrations over the top 0.5 - 1.0 m of each pit. This behavior is attributed to post-deposition loss of NO3 -, presumably by re-emission of HNO3 into the atmosphere. Copyright 1996 by the American Geophysical Union. Text Antarc* Antarctic South pole South pole University of New Hampshire: Scholars Repository Antarctic The Antarctic South Pole Hudson |
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Open Polar |
collection |
University of New Hampshire: Scholars Repository |
op_collection_id |
ftuninhampshire |
language |
unknown |
topic |
Atmospheric Sciences |
spellingShingle |
Atmospheric Sciences Dibb, Jack E. Whitlow, Sallie I Recent climate anomalies and their impact on snow chemistry at South Pole, 1987 - 1994 |
topic_facet |
Atmospheric Sciences |
description |
Three 2-m deep snowpits sampled at South Pole in 1994 provide detailed (2-cm resolution) profiles of the concentrations of soluble ionic species for the period 1987 - 1994. The most prominent feature is a large concentration spike of SO4 = in snow deposited in 1992 reflecting fallout from the eruptions of Pinatubo and Hudson in 1991. Concentrations of MSA and values of the MSA/(non-sea-salt SO4 =) ratio are elevated for about three years centered on the prominent volcanic signal. These changes appear to be due to the extended 1991 - 1993 El Nino. The overlapping effects of the volcanic eruptions and El Nino circulation preclude partitioning the enhanced deposition of SO4 = into volcanic and biogenic fractions. Nitrate concentration profiles show no relation to the severity of O3 depletion in the Antarctic stratosphere during the period of record. Rather, the profiles show a progressive decline of the annual peak concentrations over the top 0.5 - 1.0 m of each pit. This behavior is attributed to post-deposition loss of NO3 -, presumably by re-emission of HNO3 into the atmosphere. Copyright 1996 by the American Geophysical Union. |
format |
Text |
author |
Dibb, Jack E. Whitlow, Sallie I |
author_facet |
Dibb, Jack E. Whitlow, Sallie I |
author_sort |
Dibb, Jack E. |
title |
Recent climate anomalies and their impact on snow chemistry at South Pole, 1987 - 1994 |
title_short |
Recent climate anomalies and their impact on snow chemistry at South Pole, 1987 - 1994 |
title_full |
Recent climate anomalies and their impact on snow chemistry at South Pole, 1987 - 1994 |
title_fullStr |
Recent climate anomalies and their impact on snow chemistry at South Pole, 1987 - 1994 |
title_full_unstemmed |
Recent climate anomalies and their impact on snow chemistry at South Pole, 1987 - 1994 |
title_sort |
recent climate anomalies and their impact on snow chemistry at south pole, 1987 - 1994 |
publisher |
University of New Hampshire Scholars' Repository |
publishDate |
1996 |
url |
https://scholars.unh.edu/earthsci_facpub/178 https://scholars.unh.edu/cgi/viewcontent.cgi?article=1177&context=earthsci_facpub |
geographic |
Antarctic The Antarctic South Pole Hudson |
geographic_facet |
Antarctic The Antarctic South Pole Hudson |
genre |
Antarc* Antarctic South pole South pole |
genre_facet |
Antarc* Antarctic South pole South pole |
op_source |
Earth Sciences Scholarship |
op_relation |
https://scholars.unh.edu/earthsci_facpub/178 https://scholars.unh.edu/cgi/viewcontent.cgi?article=1177&context=earthsci_facpub |
op_rights |
Copyright 1996 by the American Geophysical Union. |
_version_ |
1766160743032422400 |