Atmospheric 14 CO 2 Variations in the Equatorial Region
We present here first results of 14 CO 2 monitoring at two sampling sites in the equatorial region of the South American continent (station Aychapicho, Ecuador and station Llano del Hato, Venezuela). We also include the data for two other stations representing undisturbed marine atmosphere at mid-la...
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crcambridgeupr:10.1017/s003382220003099x 2024-03-03T08:37:48+00:00 Atmospheric 14 CO 2 Variations in the Equatorial Region Rozanski, Kazimierz Levin, Ingeborg Stock, Jürgen Guevara Falcon, Raul E. Rubio, Fernando 1995 http://dx.doi.org/10.1017/s003382220003099x https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S003382220003099X en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Radiocarbon volume 37, issue 2, page 509-515 ISSN 0033-8222 1945-5755 General Earth and Planetary Sciences Archeology journal-article 1995 crcambridgeupr https://doi.org/10.1017/s003382220003099x 2024-02-08T08:41:39Z We present here first results of 14 CO 2 monitoring at two sampling sites in the equatorial region of the South American continent (station Aychapicho, Ecuador and station Llano del Hato, Venezuela). We also include the data for two other stations representing undisturbed marine atmosphere at mid-latitudes of both hemispheres, far from large continental sources and sinks of CO 2 (station Izaña, Tenerife, Spain and station Cape Grim, Tasmania). Between 1991 and 1993, 14 CO 2 levels in the tropical troposphere were generally higher by 2–5‰ when compared to mid-latitudes of both hemispheres. This apparent maximum of 14 C in the tropics can be explained by two major factors: 1) emissions of 14 C-free fossil fuel CO 2 , restricted mainly to mid-latitudes of the northern hemisphere; and 2) 14 C depletion due to gas exchange with circumpolar Antarctic upwelling water, influencing mainly mid- and high southern latitudes. The δ 14 C record so far available for the Aychapicho station provides direct evidence for a regional reduction of atmospheric 14 CO 2 levels due to gas exchange with 14 C-depleted equatorial surface ocean in the upwelling regions and dilution with the 14 C-depleted CO 2 released in these areas. Recurrent ENSO events, turning on and off the 14 C-depleted CO 2 source in the tropical Pacific, lead to relatively large temporal variations of the atmospheric 14 C level in this region. Article in Journal/Newspaper Antarc* Antarctic Cambridge University Press Antarctic Pacific Grim ENVELOPE(-64.486,-64.486,-65.379,-65.379) Radiocarbon 37 2 509 515 |
institution |
Open Polar |
collection |
Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
topic |
General Earth and Planetary Sciences Archeology |
spellingShingle |
General Earth and Planetary Sciences Archeology Rozanski, Kazimierz Levin, Ingeborg Stock, Jürgen Guevara Falcon, Raul E. Rubio, Fernando Atmospheric 14 CO 2 Variations in the Equatorial Region |
topic_facet |
General Earth and Planetary Sciences Archeology |
description |
We present here first results of 14 CO 2 monitoring at two sampling sites in the equatorial region of the South American continent (station Aychapicho, Ecuador and station Llano del Hato, Venezuela). We also include the data for two other stations representing undisturbed marine atmosphere at mid-latitudes of both hemispheres, far from large continental sources and sinks of CO 2 (station Izaña, Tenerife, Spain and station Cape Grim, Tasmania). Between 1991 and 1993, 14 CO 2 levels in the tropical troposphere were generally higher by 2–5‰ when compared to mid-latitudes of both hemispheres. This apparent maximum of 14 C in the tropics can be explained by two major factors: 1) emissions of 14 C-free fossil fuel CO 2 , restricted mainly to mid-latitudes of the northern hemisphere; and 2) 14 C depletion due to gas exchange with circumpolar Antarctic upwelling water, influencing mainly mid- and high southern latitudes. The δ 14 C record so far available for the Aychapicho station provides direct evidence for a regional reduction of atmospheric 14 CO 2 levels due to gas exchange with 14 C-depleted equatorial surface ocean in the upwelling regions and dilution with the 14 C-depleted CO 2 released in these areas. Recurrent ENSO events, turning on and off the 14 C-depleted CO 2 source in the tropical Pacific, lead to relatively large temporal variations of the atmospheric 14 C level in this region. |
format |
Article in Journal/Newspaper |
author |
Rozanski, Kazimierz Levin, Ingeborg Stock, Jürgen Guevara Falcon, Raul E. Rubio, Fernando |
author_facet |
Rozanski, Kazimierz Levin, Ingeborg Stock, Jürgen Guevara Falcon, Raul E. Rubio, Fernando |
author_sort |
Rozanski, Kazimierz |
title |
Atmospheric 14 CO 2 Variations in the Equatorial Region |
title_short |
Atmospheric 14 CO 2 Variations in the Equatorial Region |
title_full |
Atmospheric 14 CO 2 Variations in the Equatorial Region |
title_fullStr |
Atmospheric 14 CO 2 Variations in the Equatorial Region |
title_full_unstemmed |
Atmospheric 14 CO 2 Variations in the Equatorial Region |
title_sort |
atmospheric 14 co 2 variations in the equatorial region |
publisher |
Cambridge University Press (CUP) |
publishDate |
1995 |
url |
http://dx.doi.org/10.1017/s003382220003099x https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S003382220003099X |
long_lat |
ENVELOPE(-64.486,-64.486,-65.379,-65.379) |
geographic |
Antarctic Pacific Grim |
geographic_facet |
Antarctic Pacific Grim |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_source |
Radiocarbon volume 37, issue 2, page 509-515 ISSN 0033-8222 1945-5755 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1017/s003382220003099x |
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Radiocarbon |
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37 |
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2 |
container_start_page |
509 |
op_container_end_page |
515 |
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1792501763973054464 |