NERC Data Catalogue Service
APHH: Fluorescence Assay Gas Expansion measurements of OH, HO2 and RO2 made at the IAP-Beijing site during the winter and summer campaigns.
This dataset contains Fluorescence Assay Gas Expansion measurements of OH, HO2 and RO2 made at the Institute of Atmospheric Physics land station (IAP), Beijing site during the winter and summer APHH-Beijing campaigns for the Atmospheric Pollution & Human Health in a Chinese Megacity (APHH) programme.
The measurements were taken using the FAGE (Fluorescence Assay by Gas Expansion) technique which is a LIF (laser induced fluorescence) that measures on-resonance fluorescence at 308 nm. HO2 and RO2 are converted to OH via reaction with NO and NO + CO respectively.
The instrument is calibrated by photolysis of known concentration of water vapour at 185 nm to generate know concentrations of OH and HO2, same method used for HO2 but NO is injected into the flow to convert HO2 to OH. RO2 is calibrated by photolysing water vapur at 185 nm to generate OH but CH4 is added to convert OH to CH3O2, then CH3O2 is converted to OH using CO and NO. The calibration was preform every three days on campaign, and from this we can convert counts measured into concentration. The units for OH, HO2 and RO2 and there associated errors is molecules cm-3. The data has been filtered for instabilities in data collection including unstable pressure, unstable online, low laser power and not going online correctly. The data has been flagged for when the values were below limit of detection.
Default
Identification info
- Metadata Language
- English (en)
- Dataset Reference Date ()
- 2018-07-26T15:52:44
- Dataset Reference Date ()
- 2018-07-26T15:52:44
- Identifier
- Centre for Environmental Data Analysis (CEDA) / bb339ff791814fc6a8b9a93d339f5bc1
- Maintenance and update frequency
- unknown
- Update scope
- dataset
- Keywords
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- OH
- HO2
- RO2
- China
- pollution
- APHH
- GEMET - INSPIRE themes, version 1.0 ()
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- atmospheric conditions
- Limitations on Public Access
- otherRestrictions
- Other constraints
- Access to these data is available to any registered CEDA user. Please Login or Register for an account to gain access.
- Use constraints
- otherRestrictions
- Spatial representation type
- grid
- Topic category
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- Climatology, meteorology, atmosphere
))
- Begin date
- 2016-11-08T00:00:00
- End date
- 2017-06-25T22:59:59
- Code
- WGS 84
Distribution Information
- Data format
-
-
Data are NASA Ames formatted
()
-
Data are NASA Ames formatted
()
- Resource Locator
-
CEDA Data Catalogue Page
Detail and access information for the resource
- Resource Locator
-
DOWNLOAD
Download Data
- Resource Locator
-
Project Webpage at University of Birmingham
No further details.
- Resource Locator
-
CEDA Data Catalogue Page
Detail and access information for the resource
- Resource Locator
-
DOWNLOAD
Download Data
- Resource Locator
-
Project Webpage at University of Birmingham
No further details.
- Quality Scope
- dataset
Report
- Dataset Reference Date ()
- 2010-12-08
- Statement
- Data produced by Atmospheric Pollution & Human Health (APHH) project participants at University of Leeds and uploaded to Centre for Environmental Data Anaylsis (CEDA) archive.
Metadata
- File identifier
- bb339ff791814fc6a8b9a93d339f5bc1 XML
- Metadata Language
- English (en)
- Character set
- 8-bit variable size UCS Transfer Format, based on ISO/IEC 10646
- Parent identifier
- APHH: Atmospheric measurements and model results for the Atmospheric Pollution & Human Health in a Chinese Megacity 648246d2bdc7460b8159a8f9daee7844
- Resource type
- dataset
- Metadata Date
- 2023-02-06T00:52:33
- Metadata standard name
- UK GEMINI
- Metadata standard version
- 2.3
