Midwinter atmospheric temperature at altitude ~87km
This indicator is no longer maintained, and is considered OBSOLETE. See the metadata record "Davis_OH_airglow" for access to these data. INDICATOR DEFINITION Midwinter atmospheric temperatures at ~87km above Davis station, Antarctica, are determined from hydroxyl airglow emissions. The tem...
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Australian Antarctic Data Centre
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Online Access: | https://researchdata.ands.org.au/midwinter-atmospheric-temperature-altitude-87km/701745 https://data.aad.gov.au/metadata/records/SOE_Hydroxyl http://nla.gov.au/nla.party-617536 |
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ftands:oai:ands.org.au::701745 |
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record_format |
openpolar |
institution |
Open Polar |
collection |
Research Data Australia (Australian National Data Service - ANDS) |
op_collection_id |
ftands |
language |
unknown |
topic |
climatologyMeteorologyAtmosphere HYDROXYL EARTH SCIENCE ATMOSPHERE ATMOSPHERIC CHEMISTRY HYDROGEN COMPOUNDS DAVIS GREENHOUSE EFFECT STATE OF THE ENVIRONMENT HYDROXYL AIRGLOW TEMPERATURE YEAR SPECTROMETERS GROUND STATIONS GROUND-BASED OBSERVATIONS CONTINENT > ANTARCTICA > GEOGRAPHIC REGION > POLAR VERTICAL LOCATION > STRATOSPHERE TROPOSPHERE |
spellingShingle |
climatologyMeteorologyAtmosphere HYDROXYL EARTH SCIENCE ATMOSPHERE ATMOSPHERIC CHEMISTRY HYDROGEN COMPOUNDS DAVIS GREENHOUSE EFFECT STATE OF THE ENVIRONMENT HYDROXYL AIRGLOW TEMPERATURE YEAR SPECTROMETERS GROUND STATIONS GROUND-BASED OBSERVATIONS CONTINENT > ANTARCTICA > GEOGRAPHIC REGION > POLAR VERTICAL LOCATION > STRATOSPHERE TROPOSPHERE Midwinter atmospheric temperature at altitude ~87km |
topic_facet |
climatologyMeteorologyAtmosphere HYDROXYL EARTH SCIENCE ATMOSPHERE ATMOSPHERIC CHEMISTRY HYDROGEN COMPOUNDS DAVIS GREENHOUSE EFFECT STATE OF THE ENVIRONMENT HYDROXYL AIRGLOW TEMPERATURE YEAR SPECTROMETERS GROUND STATIONS GROUND-BASED OBSERVATIONS CONTINENT > ANTARCTICA > GEOGRAPHIC REGION > POLAR VERTICAL LOCATION > STRATOSPHERE TROPOSPHERE |
description |
This indicator is no longer maintained, and is considered OBSOLETE. See the metadata record "Davis_OH_airglow" for access to these data. INDICATOR DEFINITION Midwinter atmospheric temperatures at ~87km above Davis station, Antarctica, are determined from hydroxyl airglow emissions. The temperature reported is determined over the interval, day-of-year (DOY) 106 to DOY 258. TYPE OF INDICATOR There are three types of indicators used in this report: 1.Describes the CONDITION of important elements of a system; 2.Show the extent of the major PRESSURES exerted on a system; 3.Determine RESPONSES to either condition or changes in the condition of a system. This indicator is one of: CONDITION RATIONALE FOR INDICATOR SELECTION Over the last century the concentration of greenhouse gases has risen in the atmosphere. Greenhouse gases result in warming of the lower atmosphere but enhanced cooling of the upper atmosphere. Enhanced cooling rates of the upper atmosphere may provide a more readily measurable indicator of 'global warming'. Midwinter hydroxyl layer temperatures, give a proxy temperature for an altitude of ~87km (just below the coldest region of the atmosphere in winter). Associated with anthropogenic greenhouse gas increases, this tenuous region of the atmosphere is expected to cool, with the magnitude of the cooling being significantly larger than the warming at ground level. When properly measured and interpreted, this may be the atmospheric region where variations in trends associated with anthropogenic climate change can be most rapidly and conclusively determined. Hydroxyl airglow is emitted from an ~8km wide layer, centred at ~87 km. DESIGN AND STRATEGY FOR INDICATOR MONITORING PROGRAM Spatial Scale: Point value at Davis station, Antarctica Frequency: Winter averages Measurement Technique: Hydroxyl airglow rotational temperatures are determined by the standard technique involving the ratios of the intensity of hydroxyl airglow line emissions. The difficulties encountered and methods adopted at Davis are detailed in Greet et al., 1998. Refinement to the absolute temperatures determined by this technique have been published by French et al., 2000. RESEARCH ISSUES The values continue to be refined, though their relative difference between years is well quantified (see error estimates). The potential exists for determining some values at earlier epochs if instrumental uncertainties can be better quantified. This work is underway. LINKS TO OTHER INDICATORS Noctilucent cloud observations Polar statospheric cloud observations Stratopause region parameters for Davis Tropospheric and lower stratospheric temperatures Monthly averages of daily maximum and minimum temperatures Monthly extremes of daily maximum and minimum temperatures Atmospheric concentrations of greenhouse gas species The fields in this dataset are: Year Temperature |
author2 |
Australian Antarctic Data Centre (publisher) FRENCH, JOHN (hasPrincipalInvestigator) FRENCH, JOHN (processor) |
format |
Dataset |
title |
Midwinter atmospheric temperature at altitude ~87km |
title_short |
Midwinter atmospheric temperature at altitude ~87km |
title_full |
Midwinter atmospheric temperature at altitude ~87km |
title_fullStr |
Midwinter atmospheric temperature at altitude ~87km |
title_full_unstemmed |
Midwinter atmospheric temperature at altitude ~87km |
title_sort |
midwinter atmospheric temperature at altitude ~87km |
publisher |
Australian Antarctic Data Centre |
url |
https://researchdata.ands.org.au/midwinter-atmospheric-temperature-altitude-87km/701745 https://data.aad.gov.au/metadata/records/SOE_Hydroxyl http://nla.gov.au/nla.party-617536 |
op_coverage |
Spatial: northlimit=-68.5766; southlimit=-68.5767; westlimit=77.9673; eastLimit=77.9674; projection=WGS84 Temporal: From 1990-01-01 |
long_lat |
ENVELOPE(77.968,77.968,-68.576,-68.576) ENVELOPE(77.968,77.968,-68.576,-68.576) ENVELOPE(139.931,139.931,-66.690,-66.690) ENVELOPE(77.9673,77.9674,-68.5766,-68.5767) |
geographic |
Davis Station Davis-Station Midwinter |
geographic_facet |
Davis Station Davis-Station Midwinter |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
op_source |
Australian Antarctic Data Centre |
op_relation |
https://researchdata.ands.org.au/midwinter-atmospheric-temperature-altitude-87km/701745 47421724-b3de-457b-b434-701a8eeb69b1 SOE_Hydroxyl https://data.aad.gov.au/metadata/records/SOE_Hydroxyl http://nla.gov.au/nla.party-617536 |
_version_ |
1766246094039154688 |
spelling |
ftands:oai:ands.org.au::701745 2023-05-15T13:46:59+02:00 Midwinter atmospheric temperature at altitude ~87km Australian Antarctic Data Centre (publisher) FRENCH, JOHN (hasPrincipalInvestigator) FRENCH, JOHN (processor) Spatial: northlimit=-68.5766; southlimit=-68.5767; westlimit=77.9673; eastLimit=77.9674; projection=WGS84 Temporal: From 1990-01-01 https://researchdata.ands.org.au/midwinter-atmospheric-temperature-altitude-87km/701745 https://data.aad.gov.au/metadata/records/SOE_Hydroxyl http://nla.gov.au/nla.party-617536 unknown Australian Antarctic Data Centre https://researchdata.ands.org.au/midwinter-atmospheric-temperature-altitude-87km/701745 47421724-b3de-457b-b434-701a8eeb69b1 SOE_Hydroxyl https://data.aad.gov.au/metadata/records/SOE_Hydroxyl http://nla.gov.au/nla.party-617536 Australian Antarctic Data Centre climatologyMeteorologyAtmosphere HYDROXYL EARTH SCIENCE ATMOSPHERE ATMOSPHERIC CHEMISTRY HYDROGEN COMPOUNDS DAVIS GREENHOUSE EFFECT STATE OF THE ENVIRONMENT HYDROXYL AIRGLOW TEMPERATURE YEAR SPECTROMETERS GROUND STATIONS GROUND-BASED OBSERVATIONS CONTINENT > ANTARCTICA > GEOGRAPHIC REGION > POLAR VERTICAL LOCATION > STRATOSPHERE TROPOSPHERE dataset ftands 2020-01-05T21:19:19Z This indicator is no longer maintained, and is considered OBSOLETE. See the metadata record "Davis_OH_airglow" for access to these data. INDICATOR DEFINITION Midwinter atmospheric temperatures at ~87km above Davis station, Antarctica, are determined from hydroxyl airglow emissions. The temperature reported is determined over the interval, day-of-year (DOY) 106 to DOY 258. TYPE OF INDICATOR There are three types of indicators used in this report: 1.Describes the CONDITION of important elements of a system; 2.Show the extent of the major PRESSURES exerted on a system; 3.Determine RESPONSES to either condition or changes in the condition of a system. This indicator is one of: CONDITION RATIONALE FOR INDICATOR SELECTION Over the last century the concentration of greenhouse gases has risen in the atmosphere. Greenhouse gases result in warming of the lower atmosphere but enhanced cooling of the upper atmosphere. Enhanced cooling rates of the upper atmosphere may provide a more readily measurable indicator of 'global warming'. Midwinter hydroxyl layer temperatures, give a proxy temperature for an altitude of ~87km (just below the coldest region of the atmosphere in winter). Associated with anthropogenic greenhouse gas increases, this tenuous region of the atmosphere is expected to cool, with the magnitude of the cooling being significantly larger than the warming at ground level. When properly measured and interpreted, this may be the atmospheric region where variations in trends associated with anthropogenic climate change can be most rapidly and conclusively determined. Hydroxyl airglow is emitted from an ~8km wide layer, centred at ~87 km. DESIGN AND STRATEGY FOR INDICATOR MONITORING PROGRAM Spatial Scale: Point value at Davis station, Antarctica Frequency: Winter averages Measurement Technique: Hydroxyl airglow rotational temperatures are determined by the standard technique involving the ratios of the intensity of hydroxyl airglow line emissions. The difficulties encountered and methods adopted at Davis are detailed in Greet et al., 1998. Refinement to the absolute temperatures determined by this technique have been published by French et al., 2000. RESEARCH ISSUES The values continue to be refined, though their relative difference between years is well quantified (see error estimates). The potential exists for determining some values at earlier epochs if instrumental uncertainties can be better quantified. This work is underway. LINKS TO OTHER INDICATORS Noctilucent cloud observations Polar statospheric cloud observations Stratopause region parameters for Davis Tropospheric and lower stratospheric temperatures Monthly averages of daily maximum and minimum temperatures Monthly extremes of daily maximum and minimum temperatures Atmospheric concentrations of greenhouse gas species The fields in this dataset are: Year Temperature Dataset Antarc* Antarctica Research Data Australia (Australian National Data Service - ANDS) Davis Station ENVELOPE(77.968,77.968,-68.576,-68.576) Davis-Station ENVELOPE(77.968,77.968,-68.576,-68.576) Midwinter ENVELOPE(139.931,139.931,-66.690,-66.690) ENVELOPE(77.9673,77.9674,-68.5766,-68.5767) |