Long-term environmental monitoring of [sup 14]C levels in the Ottawa region
Ambient levels of [sup 14]C have been monitored near Ottawa, Canada by the Radiocarbon Dating Laboratory, Geological Survey of Canada, since 1961. The 32 y of data on maple leaves documents the rapid increase of bomb-generated [sup 14]C in the mid-1960s and its exponential decline to the present. Th...
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| Veröffentlicht in: | Environment international 1994-01, Vol.20:5 |
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| creator | McNeely, R. |
| description | Ambient levels of [sup 14]C have been monitored near Ottawa, Canada by the Radiocarbon Dating Laboratory, Geological Survey of Canada, since 1961. The 32 y of data on maple leaves documents the rapid increase of bomb-generated [sup 14]C in the mid-1960s and its exponential decline to the present. This bio-generated data set indicates that the half-life of bomb-generated [sup 14]C is 12 y as a result of dilution with prebomb [sup 14]C from the decay of organic matter and exchange with the oceanic reservoir, and, of course, a dilution from fossil fuel combustion. Atmospheric [sup 14]C activity will approach 10% of prebomb levels by the turn of the century, but it will be another century before the prebomb levels of atmospheric [sup 14]C are approached. 4 refs., 3 figs., 1 tab. |
| doi_str_mv | 10.1016/0160-4120(94)90013-2 |
| format | Article |
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The 32 y of data on maple leaves documents the rapid increase of bomb-generated [sup 14]C in the mid-1960s and its exponential decline to the present. This bio-generated data set indicates that the half-life of bomb-generated [sup 14]C is 12 y as a result of dilution with prebomb [sup 14]C from the decay of organic matter and exchange with the oceanic reservoir, and, of course, a dilution from fossil fuel combustion. Atmospheric [sup 14]C activity will approach 10% of prebomb levels by the turn of the century, but it will be another century before the prebomb levels of atmospheric [sup 14]C are approached. 4 refs., 3 figs., 1 tab.</description><identifier>ISSN: 0160-4120</identifier><identifier>EISSN: 1873-6750</identifier><identifier>DOI: 10.1016/0160-4120(94)90013-2</identifier><language>eng</language><publisher>United States</publisher><subject>ANNUAL VARIATIONS ; BETA DECAY RADIOISOTOPES ; BETA-MINUS DECAY RADIOISOTOPES ; CANADA ; CARBON 14 ; CARBON ISOTOPES ; DEVELOPED COUNTRIES ; ECOLOGICAL CONCENTRATION ; ENVIRONMENTAL SCIENCES ; EVEN-EVEN NUCLEI ; ISOTOPES ; LIGHT NUCLEI ; MONITORING ; NORTH AMERICA ; NUCLEI ; RADIATION MONITORING ; RADIOISOTOPES ; VARIATIONS ; YEARS LIVING RADIOISOTOPES 540130 -- Environment, Atmospheric-- Radioactive Materials Monitoring & Transport-- (1990-)</subject><ispartof>Environment international, 1994-01, Vol.20:5</ispartof><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>230,314,780,784,885,27923,27924</link.rule.ids><backlink>$$Uhttps://www.osti.gov/biblio/6708425$$D View this record in Osti.gov$$Hfree_for_read</backlink></links><search><creatorcontrib>McNeely, R.</creatorcontrib><title>Long-term environmental monitoring of [sup 14]C levels in the Ottawa region</title><title>Environment international</title><description>Ambient levels of [sup 14]C have been monitored near Ottawa, Canada by the Radiocarbon Dating Laboratory, Geological Survey of Canada, since 1961. The 32 y of data on maple leaves documents the rapid increase of bomb-generated [sup 14]C in the mid-1960s and its exponential decline to the present. This bio-generated data set indicates that the half-life of bomb-generated [sup 14]C is 12 y as a result of dilution with prebomb [sup 14]C from the decay of organic matter and exchange with the oceanic reservoir, and, of course, a dilution from fossil fuel combustion. Atmospheric [sup 14]C activity will approach 10% of prebomb levels by the turn of the century, but it will be another century before the prebomb levels of atmospheric [sup 14]C are approached. 4 refs., 3 figs., 1 tab.</description><subject>ANNUAL VARIATIONS</subject><subject>BETA DECAY RADIOISOTOPES</subject><subject>BETA-MINUS DECAY RADIOISOTOPES</subject><subject>CANADA</subject><subject>CARBON 14</subject><subject>CARBON ISOTOPES</subject><subject>DEVELOPED COUNTRIES</subject><subject>ECOLOGICAL CONCENTRATION</subject><subject>ENVIRONMENTAL SCIENCES</subject><subject>EVEN-EVEN NUCLEI</subject><subject>ISOTOPES</subject><subject>LIGHT NUCLEI</subject><subject>MONITORING</subject><subject>NORTH AMERICA</subject><subject>NUCLEI</subject><subject>RADIATION MONITORING</subject><subject>RADIOISOTOPES</subject><subject>VARIATIONS</subject><subject>YEARS LIVING RADIOISOTOPES 540130 -- Environment, Atmospheric-- Radioactive Materials Monitoring & Transport-- (1990-)</subject><issn>0160-4120</issn><issn>1873-6750</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1994</creationdate><recordtype>article</recordtype><recordid>eNo9jM1KxDAYAIMoWFffwEPwpIdoviT9yVGKq2JhL3oSWdLkazfSJtLE9fUVFA_DXIYh5Bz4NXCobn7gTIHgl1pdac5BMnFACmhqyaq65Iek-E-OyUlK75xzoZqyIE9dDCPLuMwUw94vMcwYspnoHIPPcfFhpHGgr-nzg4J6a-mEe5wS9YHmHdJNzubL0AVHH8MpORrMlPDszyvysr57bh9Yt7l_bG87ZgCazEQtoHZKSO2ccYOWgzB9pZUEDTVYbcre9mXvrAJXOuHQou11D2aQSiJWckUufr8xZb9N1me0OxtDQJu3Vc0bJUr5DfrNUEk</recordid><startdate>19940101</startdate><enddate>19940101</enddate><creator>McNeely, R.</creator><scope>OTOTI</scope></search><sort><creationdate>19940101</creationdate><title>Long-term environmental monitoring of [sup 14]C levels in the Ottawa region</title><author>McNeely, R.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-a118t-27217d4239ddadf93f2ab694319171c9a5bcb5bdc41d5d2dececb9b1af343ee63</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>1994</creationdate><topic>ANNUAL VARIATIONS</topic><topic>BETA DECAY RADIOISOTOPES</topic><topic>BETA-MINUS DECAY RADIOISOTOPES</topic><topic>CANADA</topic><topic>CARBON 14</topic><topic>CARBON ISOTOPES</topic><topic>DEVELOPED COUNTRIES</topic><topic>ECOLOGICAL CONCENTRATION</topic><topic>ENVIRONMENTAL SCIENCES</topic><topic>EVEN-EVEN NUCLEI</topic><topic>ISOTOPES</topic><topic>LIGHT NUCLEI</topic><topic>MONITORING</topic><topic>NORTH AMERICA</topic><topic>NUCLEI</topic><topic>RADIATION MONITORING</topic><topic>RADIOISOTOPES</topic><topic>VARIATIONS</topic><topic>YEARS LIVING RADIOISOTOPES 540130 -- Environment, Atmospheric-- Radioactive Materials Monitoring & Transport-- (1990-)</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>McNeely, R.</creatorcontrib><collection>OSTI.GOV</collection><jtitle>Environment international</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>McNeely, R.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Long-term environmental monitoring of [sup 14]C levels in the Ottawa region</atitle><jtitle>Environment international</jtitle><date>1994-01-01</date><risdate>1994</risdate><volume>20:5</volume><issn>0160-4120</issn><eissn>1873-6750</eissn><abstract>Ambient levels of [sup 14]C have been monitored near Ottawa, Canada by the Radiocarbon Dating Laboratory, Geological Survey of Canada, since 1961. The 32 y of data on maple leaves documents the rapid increase of bomb-generated [sup 14]C in the mid-1960s and its exponential decline to the present. This bio-generated data set indicates that the half-life of bomb-generated [sup 14]C is 12 y as a result of dilution with prebomb [sup 14]C from the decay of organic matter and exchange with the oceanic reservoir, and, of course, a dilution from fossil fuel combustion. Atmospheric [sup 14]C activity will approach 10% of prebomb levels by the turn of the century, but it will be another century before the prebomb levels of atmospheric [sup 14]C are approached. 4 refs., 3 figs., 1 tab.</abstract><cop>United States</cop><doi>10.1016/0160-4120(94)90013-2</doi></addata></record> |
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| identifier | ISSN: 0160-4120 |
| ispartof | Environment international, 1994-01, Vol.20:5 |
| issn | 0160-4120 1873-6750 |
| language | eng |
| recordid | cdi_osti_scitechconnect_6708425 |
| source | ScienceDirect Journals (5 years ago - present) |
| subjects | ANNUAL VARIATIONS BETA DECAY RADIOISOTOPES BETA-MINUS DECAY RADIOISOTOPES CANADA CARBON 14 CARBON ISOTOPES DEVELOPED COUNTRIES ECOLOGICAL CONCENTRATION ENVIRONMENTAL SCIENCES EVEN-EVEN NUCLEI ISOTOPES LIGHT NUCLEI MONITORING NORTH AMERICA NUCLEI RADIATION MONITORING RADIOISOTOPES VARIATIONS YEARS LIVING RADIOISOTOPES 540130 -- Environment, Atmospheric-- Radioactive Materials Monitoring & Transport-- (1990-) |
| title | Long-term environmental monitoring of [sup 14]C levels in the Ottawa region |
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