Comparison of halocarbon measurements in an atmospheric dry whole air sample
Abstract The growing awareness of climate change/global warming, and continuing concerns regarding stratospheric ozone depletion, will require continued measurements and standards for many compounds, in particular halocarbons that are linked to these issues. In order to track atmospheric mole fracti...
| Main Authors: | , , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
BioOne
2015-11-01
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| Series: | Elementa: Science of the Anthropocene |
| Subjects: | |
| Online Access: | http://elementascience.org/article/info:doi/10.12952/journal.elementa.000075 |
| _version_ | 1818537338777632768 |
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| author | George C. Rhoderick Bradley D. Hall Christina M. Harth Jin Seog Kim Jeongsoon Lee Stephen A. Montzka Jens Mühle Stefan Reimann Martin K. Vollmer Ray F. Weiss |
| author_facet | George C. Rhoderick Bradley D. Hall Christina M. Harth Jin Seog Kim Jeongsoon Lee Stephen A. Montzka Jens Mühle Stefan Reimann Martin K. Vollmer Ray F. Weiss |
| author_sort | George C. Rhoderick |
| collection | DOAJ |
| description | Abstract The growing awareness of climate change/global warming, and continuing concerns regarding stratospheric ozone depletion, will require continued measurements and standards for many compounds, in particular halocarbons that are linked to these issues. In order to track atmospheric mole fractions and assess the impact of policy on emission rates, it is necessary to demonstrate measurement equivalence at the highest levels of accuracy for assigned values of standards. Precise measurements of these species aid in determining small changes in their atmospheric abundance. A common source of standards/scales and/or well-documented agreement of different scales used to calibrate the measurement instrumentation are key to understanding many sets of data reported by researchers. This report describes the results of a comparison study among National Metrology Institutes and atmospheric research laboratories for the chlorofluorocarbons (CFCs) dichlorodifluoromethane (CFC-12), trichlorofluoromethane (CFC-11), and 1,1,2-trichlorotrifluoroethane (CFC-113); the hydrochlorofluorocarbons (HCFCs) chlorodifluoromethane (HCFC-22) and 1-chloro-1,1-difluoroethane (HCFC-142b); and the hydrofluorocarbon (HFC) 1,1,1,2-tetrafluoroethane (HFC-134a), all in a dried whole air sample. The objective of this study is to compare calibration standards/scales and the measurement capabilities of the participants for these halocarbons at trace atmospheric levels. The results of this study show agreement among four independent calibration scales to better than 2.5% in almost all cases, with many of the reported agreements being better than 1.0%. |
| first_indexed | 2024-12-11T18:49:30Z |
| format | Article |
| id | doaj.art-6804b6aa43054fdcb508f1bcc94006cc |
| institution | Directory Open Access Journal |
| issn | 2325-1026 |
| language | English |
| last_indexed | 2024-12-11T18:49:30Z |
| publishDate | 2015-11-01 |
| publisher | BioOne |
| record_format | Article |
| series | Elementa: Science of the Anthropocene |
| spelling | doaj.art-6804b6aa43054fdcb508f1bcc94006cc2022-12-22T00:54:20ZengBioOneElementa: Science of the Anthropocene2325-10262015-11-0110.12952/journal.elementa.000075ELEMENTA-D-14-00003Comparison of halocarbon measurements in an atmospheric dry whole air sampleGeorge C. RhoderickBradley D. HallChristina M. HarthJin Seog KimJeongsoon LeeStephen A. MontzkaJens MühleStefan ReimannMartin K. VollmerRay F. WeissAbstract The growing awareness of climate change/global warming, and continuing concerns regarding stratospheric ozone depletion, will require continued measurements and standards for many compounds, in particular halocarbons that are linked to these issues. In order to track atmospheric mole fractions and assess the impact of policy on emission rates, it is necessary to demonstrate measurement equivalence at the highest levels of accuracy for assigned values of standards. Precise measurements of these species aid in determining small changes in their atmospheric abundance. A common source of standards/scales and/or well-documented agreement of different scales used to calibrate the measurement instrumentation are key to understanding many sets of data reported by researchers. This report describes the results of a comparison study among National Metrology Institutes and atmospheric research laboratories for the chlorofluorocarbons (CFCs) dichlorodifluoromethane (CFC-12), trichlorofluoromethane (CFC-11), and 1,1,2-trichlorotrifluoroethane (CFC-113); the hydrochlorofluorocarbons (HCFCs) chlorodifluoromethane (HCFC-22) and 1-chloro-1,1-difluoroethane (HCFC-142b); and the hydrofluorocarbon (HFC) 1,1,1,2-tetrafluoroethane (HFC-134a), all in a dried whole air sample. The objective of this study is to compare calibration standards/scales and the measurement capabilities of the participants for these halocarbons at trace atmospheric levels. The results of this study show agreement among four independent calibration scales to better than 2.5% in almost all cases, with many of the reported agreements being better than 1.0%.http://elementascience.org/article/info:doi/10.12952/journal.elementa.000075International ComparisonHalocarbonsCalibration Standards and Scales |
| spellingShingle | George C. Rhoderick Bradley D. Hall Christina M. Harth Jin Seog Kim Jeongsoon Lee Stephen A. Montzka Jens Mühle Stefan Reimann Martin K. Vollmer Ray F. Weiss Comparison of halocarbon measurements in an atmospheric dry whole air sample Elementa: Science of the Anthropocene International Comparison Halocarbons Calibration Standards and Scales |
| title | Comparison of halocarbon measurements in an atmospheric dry whole air sample |
| title_full | Comparison of halocarbon measurements in an atmospheric dry whole air sample |
| title_fullStr | Comparison of halocarbon measurements in an atmospheric dry whole air sample |
| title_full_unstemmed | Comparison of halocarbon measurements in an atmospheric dry whole air sample |
| title_short | Comparison of halocarbon measurements in an atmospheric dry whole air sample |
| title_sort | comparison of halocarbon measurements in an atmospheric dry whole air sample |
| topic | International Comparison Halocarbons Calibration Standards and Scales |
| url | http://elementascience.org/article/info:doi/10.12952/journal.elementa.000075 |
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