EGU General Assembly 2009
The growth of background levels of atmospheric methane showed a marked increase in both hemispheres in 2007. This paper looks at the data from a range of observation stations that monitor methane at high frequency, including Barrow (Alaska), Ragged Point (Barbados), Trinidad Head (California), Cape...
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Online Access: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.625.5125 http://meetingorganizer.copernicus.org/egu2009/egu2009-10439.pdf |
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.625.5125 2023-05-15T15:39:43+02:00 EGU General Assembly 2009 The Pennsylvania State University CiteSeerX Archives application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.625.5125 http://meetingorganizer.copernicus.org/egu2009/egu2009-10439.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.625.5125 http://meetingorganizer.copernicus.org/egu2009/egu2009-10439.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://meetingorganizer.copernicus.org/egu2009/egu2009-10439.pdf text ftciteseerx 2016-01-08T15:12:15Z The growth of background levels of atmospheric methane showed a marked increase in both hemispheres in 2007. This paper looks at the data from a range of observation stations that monitor methane at high frequency, including Barrow (Alaska), Ragged Point (Barbados), Trinidad Head (California), Cape Grim (Australia), Cape Matatula (Samoa), Gosan (South Korea) and Mace Head (Ireland), to try to understand the likely causes for this sudden rise. At each station the recent history of the air arriving at each station is considered using the NAME model. NAME (Numerical Atmospheric-dispersion Modelling Environment) is a Lagrangian atmospheric dispersion model that uses 3D meteorology from the UK Met Office numerical weather prediction model. High temporal resolution and high precision measurements of a wide range of trace gases in ambient air are available from the instrumentation at the AGAGE (Advanced Global Atmospheric Gases Experiment), NOAA and Korean measurement stations. The locations of these stations span both hemispheres and therefore allow global changes to be monitored. In this work, we are primarily interested in the measurements of methane and carbon monoxide. Baseline concentrations of methane and carbon monoxide have been determined for both the Northern and Southern Hemispheres using NAME and statistical post-processing of the observations at each measurement station. For this application, NAME is run backwards in time for ten days for each 3-hour interval for the Text Barrow Alaska Unknown Grim ENVELOPE(-64.486,-64.486,-65.379,-65.379) Mace ENVELOPE(155.883,155.883,-81.417,-81.417) Ragged Point ENVELOPE(-55.331,-55.331,49.533,49.533) Trinidad ENVELOPE(-60.734,-60.734,-63.816,-63.816) |
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English |
description |
The growth of background levels of atmospheric methane showed a marked increase in both hemispheres in 2007. This paper looks at the data from a range of observation stations that monitor methane at high frequency, including Barrow (Alaska), Ragged Point (Barbados), Trinidad Head (California), Cape Grim (Australia), Cape Matatula (Samoa), Gosan (South Korea) and Mace Head (Ireland), to try to understand the likely causes for this sudden rise. At each station the recent history of the air arriving at each station is considered using the NAME model. NAME (Numerical Atmospheric-dispersion Modelling Environment) is a Lagrangian atmospheric dispersion model that uses 3D meteorology from the UK Met Office numerical weather prediction model. High temporal resolution and high precision measurements of a wide range of trace gases in ambient air are available from the instrumentation at the AGAGE (Advanced Global Atmospheric Gases Experiment), NOAA and Korean measurement stations. The locations of these stations span both hemispheres and therefore allow global changes to be monitored. In this work, we are primarily interested in the measurements of methane and carbon monoxide. Baseline concentrations of methane and carbon monoxide have been determined for both the Northern and Southern Hemispheres using NAME and statistical post-processing of the observations at each measurement station. For this application, NAME is run backwards in time for ten days for each 3-hour interval for the |
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The Pennsylvania State University CiteSeerX Archives |
format |
Text |
title |
EGU General Assembly 2009 |
spellingShingle |
EGU General Assembly 2009 |
title_short |
EGU General Assembly 2009 |
title_full |
EGU General Assembly 2009 |
title_fullStr |
EGU General Assembly 2009 |
title_full_unstemmed |
EGU General Assembly 2009 |
title_sort |
egu general assembly 2009 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.625.5125 http://meetingorganizer.copernicus.org/egu2009/egu2009-10439.pdf |
long_lat |
ENVELOPE(-64.486,-64.486,-65.379,-65.379) ENVELOPE(155.883,155.883,-81.417,-81.417) ENVELOPE(-55.331,-55.331,49.533,49.533) ENVELOPE(-60.734,-60.734,-63.816,-63.816) |
geographic |
Grim Mace Ragged Point Trinidad |
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Grim Mace Ragged Point Trinidad |
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Barrow Alaska |
genre_facet |
Barrow Alaska |
op_source |
http://meetingorganizer.copernicus.org/egu2009/egu2009-10439.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.625.5125 http://meetingorganizer.copernicus.org/egu2009/egu2009-10439.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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