Enhanced tropical methane production in response to iceberg discharge in the North Atlantic
The causal mechanisms responsible for the abrupt climate changes of the Last Glacial Period remain unclear. One major difficulty is dating ice-rafted debris deposits associated with Heinrich events: Extensive iceberg influxes into the North Atlantic Ocean linked to global impacts on climate and biog...
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American Association for the Advancement of Science
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Online Access: | https://nrl.northumbria.ac.uk/id/eprint/37618/ https://doi.org/10.1126/science.1262005 |
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ftunivnorthumb:oai:nrl.northumbria.ac.uk:37618 2023-05-15T16:28:48+02:00 Enhanced tropical methane production in response to iceberg discharge in the North Atlantic Rhodes, Rachael H. Brook, Edward J. Chiang, John C. H. Blunier, Thomas Maselli, Olivia J. McConnell, Joseph R. Romanini, Daniele Severinghaus, Jeffrey P. 2015-05-29 https://nrl.northumbria.ac.uk/id/eprint/37618/ https://doi.org/10.1126/science.1262005 unknown American Association for the Advancement of Science Rhodes, Rachael H., Brook, Edward J., Chiang, John C. H., Blunier, Thomas, Maselli, Olivia J., McConnell, Joseph R., Romanini, Daniele and Severinghaus, Jeffrey P. (2015) Enhanced tropical methane production in response to iceberg discharge in the North Atlantic. Science, 348 (6238). pp. 1016-1019. ISSN 0036-8075 F800 Physical and Terrestrial Geographical and Environmental Sciences Article PeerReviewed 2015 ftunivnorthumb https://doi.org/10.1126/science.1262005 2022-09-25T06:08:59Z The causal mechanisms responsible for the abrupt climate changes of the Last Glacial Period remain unclear. One major difficulty is dating ice-rafted debris deposits associated with Heinrich events: Extensive iceberg influxes into the North Atlantic Ocean linked to global impacts on climate and biogeochemistry. In a new ice core record of atmospheric methane with ultrahigh temporal resolution, we find abrupt methane increases within Heinrich stadials 1, 2, 4, and 5 that, uniquely, have no counterparts in Greenland temperature proxies. Using a heuristic model of tropical rainfall distribution, we propose that Hudson Strait Heinrich events caused rainfall intensification over Southern Hemisphere land areas, thereby producing excess methane in tropical wetlands. Our findings suggest that the climatic impacts of Heinrich events persisted for 740 to 1520 years. Article in Journal/Newspaper Greenland Hudson Strait ice core North Atlantic Northumbria University, Newcastle: Northumbria Research Link (NRL) Greenland Hudson Hudson Strait ENVELOPE(-70.000,-70.000,62.000,62.000) Science 348 6238 1016 1019 |
institution |
Open Polar |
collection |
Northumbria University, Newcastle: Northumbria Research Link (NRL) |
op_collection_id |
ftunivnorthumb |
language |
unknown |
topic |
F800 Physical and Terrestrial Geographical and Environmental Sciences |
spellingShingle |
F800 Physical and Terrestrial Geographical and Environmental Sciences Rhodes, Rachael H. Brook, Edward J. Chiang, John C. H. Blunier, Thomas Maselli, Olivia J. McConnell, Joseph R. Romanini, Daniele Severinghaus, Jeffrey P. Enhanced tropical methane production in response to iceberg discharge in the North Atlantic |
topic_facet |
F800 Physical and Terrestrial Geographical and Environmental Sciences |
description |
The causal mechanisms responsible for the abrupt climate changes of the Last Glacial Period remain unclear. One major difficulty is dating ice-rafted debris deposits associated with Heinrich events: Extensive iceberg influxes into the North Atlantic Ocean linked to global impacts on climate and biogeochemistry. In a new ice core record of atmospheric methane with ultrahigh temporal resolution, we find abrupt methane increases within Heinrich stadials 1, 2, 4, and 5 that, uniquely, have no counterparts in Greenland temperature proxies. Using a heuristic model of tropical rainfall distribution, we propose that Hudson Strait Heinrich events caused rainfall intensification over Southern Hemisphere land areas, thereby producing excess methane in tropical wetlands. Our findings suggest that the climatic impacts of Heinrich events persisted for 740 to 1520 years. |
format |
Article in Journal/Newspaper |
author |
Rhodes, Rachael H. Brook, Edward J. Chiang, John C. H. Blunier, Thomas Maselli, Olivia J. McConnell, Joseph R. Romanini, Daniele Severinghaus, Jeffrey P. |
author_facet |
Rhodes, Rachael H. Brook, Edward J. Chiang, John C. H. Blunier, Thomas Maselli, Olivia J. McConnell, Joseph R. Romanini, Daniele Severinghaus, Jeffrey P. |
author_sort |
Rhodes, Rachael H. |
title |
Enhanced tropical methane production in response to iceberg discharge in the North Atlantic |
title_short |
Enhanced tropical methane production in response to iceberg discharge in the North Atlantic |
title_full |
Enhanced tropical methane production in response to iceberg discharge in the North Atlantic |
title_fullStr |
Enhanced tropical methane production in response to iceberg discharge in the North Atlantic |
title_full_unstemmed |
Enhanced tropical methane production in response to iceberg discharge in the North Atlantic |
title_sort |
enhanced tropical methane production in response to iceberg discharge in the north atlantic |
publisher |
American Association for the Advancement of Science |
publishDate |
2015 |
url |
https://nrl.northumbria.ac.uk/id/eprint/37618/ https://doi.org/10.1126/science.1262005 |
long_lat |
ENVELOPE(-70.000,-70.000,62.000,62.000) |
geographic |
Greenland Hudson Hudson Strait |
geographic_facet |
Greenland Hudson Hudson Strait |
genre |
Greenland Hudson Strait ice core North Atlantic |
genre_facet |
Greenland Hudson Strait ice core North Atlantic |
op_relation |
Rhodes, Rachael H., Brook, Edward J., Chiang, John C. H., Blunier, Thomas, Maselli, Olivia J., McConnell, Joseph R., Romanini, Daniele and Severinghaus, Jeffrey P. (2015) Enhanced tropical methane production in response to iceberg discharge in the North Atlantic. Science, 348 (6238). pp. 1016-1019. ISSN 0036-8075 |
op_doi |
https://doi.org/10.1126/science.1262005 |
container_title |
Science |
container_volume |
348 |
container_issue |
6238 |
container_start_page |
1016 |
op_container_end_page |
1019 |
_version_ |
1766018484935852032 |