INTENSIVE ATMOSPHERIC MERCURY MEASUREMENTS AT TERRA NOVA BAY IN ANTARCTICA DURING NOVEMBER AND DECEMBER 2000
It is well known that due to its long atmospheric residence time, mercury is distributed on a global scale and aeolian transport is believed to be the major contributor to mercury in polar environments. No measurements of reactive gaseous mercury (RGM) at all have ever been performed in the Antarcti...
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ftepa:oai:epaEIMS:65756 2023-05-15T13:45:53+02:00 INTENSIVE ATMOSPHERIC MERCURY MEASUREMENTS AT TERRA NOVA BAY IN ANTARCTICA DURING NOVEMBER AND DECEMBER 2000 F Sprovieri M Hedgecock N Pirrone M Landis R Stevens 2005-12-22T16:47:31Z http://oaspub.epa.gov/eims/eimsapi.dispdetail?deid=65756 unknown NATIONAL EXPOSURE RESEARCH LABORATORY Text 2005 ftepa 2007-11-21T14:01:35Z It is well known that due to its long atmospheric residence time, mercury is distributed on a global scale and aeolian transport is believed to be the major contributor to mercury in polar environments. No measurements of reactive gaseous mercury (RGM) at all have ever been performed in the Antarctic before. Hg0(g) concentrations were in the range 0.29 to 2.3 ng m-3, with an average value of 0.9 plus/minus0.3 ng m-3. RGM was measured using KCl-coated annular denuders and a speciation unit coupled to a TGM analyzer; concentrations ranged from 10.5 to 334 pg m-3, with an average of 116.2 plus/minus 77.8 pg m-3. The Hg0(g) measurements are in good agreement with the few data available for such southerly latitudes. The RGM concentrations are as high as those found in some industrial environments; the high concentrations in the absence of local sources (anthropogenic or natural) show that in situ gas phase oxidation of Hg0 is the most important factor influencing RGM production and therefore also Hg deposition. The toxicity of Hg means that the consequences of high concentrations of oxidized and soluble Hg species depositing in the fragile Antarctic environment could be serious indeed. Text Antarc* Antarctic Antarctica Environmental Protection Agency (EPA): Science Inventory Antarctic Terra Nova Bay The Antarctic |
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Open Polar |
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Environmental Protection Agency (EPA): Science Inventory |
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ftepa |
language |
unknown |
description |
It is well known that due to its long atmospheric residence time, mercury is distributed on a global scale and aeolian transport is believed to be the major contributor to mercury in polar environments. No measurements of reactive gaseous mercury (RGM) at all have ever been performed in the Antarctic before. Hg0(g) concentrations were in the range 0.29 to 2.3 ng m-3, with an average value of 0.9 plus/minus0.3 ng m-3. RGM was measured using KCl-coated annular denuders and a speciation unit coupled to a TGM analyzer; concentrations ranged from 10.5 to 334 pg m-3, with an average of 116.2 plus/minus 77.8 pg m-3. The Hg0(g) measurements are in good agreement with the few data available for such southerly latitudes. The RGM concentrations are as high as those found in some industrial environments; the high concentrations in the absence of local sources (anthropogenic or natural) show that in situ gas phase oxidation of Hg0 is the most important factor influencing RGM production and therefore also Hg deposition. The toxicity of Hg means that the consequences of high concentrations of oxidized and soluble Hg species depositing in the fragile Antarctic environment could be serious indeed. |
format |
Text |
author |
F Sprovieri M Hedgecock N Pirrone M Landis R Stevens |
spellingShingle |
F Sprovieri M Hedgecock N Pirrone M Landis R Stevens INTENSIVE ATMOSPHERIC MERCURY MEASUREMENTS AT TERRA NOVA BAY IN ANTARCTICA DURING NOVEMBER AND DECEMBER 2000 |
author_facet |
F Sprovieri M Hedgecock N Pirrone M Landis R Stevens |
author_sort |
F Sprovieri |
title |
INTENSIVE ATMOSPHERIC MERCURY MEASUREMENTS AT TERRA NOVA BAY IN ANTARCTICA DURING NOVEMBER AND DECEMBER 2000 |
title_short |
INTENSIVE ATMOSPHERIC MERCURY MEASUREMENTS AT TERRA NOVA BAY IN ANTARCTICA DURING NOVEMBER AND DECEMBER 2000 |
title_full |
INTENSIVE ATMOSPHERIC MERCURY MEASUREMENTS AT TERRA NOVA BAY IN ANTARCTICA DURING NOVEMBER AND DECEMBER 2000 |
title_fullStr |
INTENSIVE ATMOSPHERIC MERCURY MEASUREMENTS AT TERRA NOVA BAY IN ANTARCTICA DURING NOVEMBER AND DECEMBER 2000 |
title_full_unstemmed |
INTENSIVE ATMOSPHERIC MERCURY MEASUREMENTS AT TERRA NOVA BAY IN ANTARCTICA DURING NOVEMBER AND DECEMBER 2000 |
title_sort |
intensive atmospheric mercury measurements at terra nova bay in antarctica during november and december 2000 |
publishDate |
2005 |
url |
http://oaspub.epa.gov/eims/eimsapi.dispdetail?deid=65756 |
geographic |
Antarctic Terra Nova Bay The Antarctic |
geographic_facet |
Antarctic Terra Nova Bay The Antarctic |
genre |
Antarc* Antarctic Antarctica |
genre_facet |
Antarc* Antarctic Antarctica |
op_source |
NATIONAL EXPOSURE RESEARCH LABORATORY |
_version_ |
1766231973725995008 |