Geochemical constraints on the Laurentide Ice Sheet contribution to Meltwater Pulse 1A
a b s t r a c t Planktonic and benthic d 18 O records adjacent to the runoff outlets of the Laurentide Ice Sheet (LIS) indicate that the LIS contributed to the abrupt w20 m rise in sea level w14.6 ka, Meltwater Pulse 1A (MWP-1A). However, the magnitude of the LIS contribution still remains unresolve...
Main Author: | |
---|---|
Other Authors: | |
Format: | Text |
Language: | English |
Published: |
2009
|
Subjects: | |
Online Access: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1081.8053 http://geoscience.wisc.edu/geoscience/wp-content/uploads/2010/07/carlson_2009_qsr.pdf |
id |
ftciteseerx:oai:CiteSeerX.psu:10.1.1.1081.8053 |
---|---|
record_format |
openpolar |
spelling |
ftciteseerx:oai:CiteSeerX.psu:10.1.1.1081.8053 2023-05-15T14:01:06+02:00 Geochemical constraints on the Laurentide Ice Sheet contribution to Meltwater Pulse 1A Anders E Carlson The Pennsylvania State University CiteSeerX Archives 2009 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1081.8053 http://geoscience.wisc.edu/geoscience/wp-content/uploads/2010/07/carlson_2009_qsr.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1081.8053 http://geoscience.wisc.edu/geoscience/wp-content/uploads/2010/07/carlson_2009_qsr.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://geoscience.wisc.edu/geoscience/wp-content/uploads/2010/07/carlson_2009_qsr.pdf text 2009 ftciteseerx 2020-05-03T00:25:55Z a b s t r a c t Planktonic and benthic d 18 O records adjacent to the runoff outlets of the Laurentide Ice Sheet (LIS) indicate that the LIS contributed to the abrupt w20 m rise in sea level w14.6 ka, Meltwater Pulse 1A (MWP-1A). However, the magnitude of the LIS contribution still remains unresolved. Here, I use a freshwater runoff-ocean mixing model to calculate the LIS meltwater required to explain the decreases in planktonic and benthic d 18 O observed during MWP-1A at the southern, eastern and northern runoff outlets of the LIS. Maximum LIS contributions in equivalent sea level rise for a 500-year long MWP-1A are 2.7 m discharged into the Gulf of Mexico as a combined hyperpycnal and hypopycnal flow, 2.1 m discharged into the North Atlantic, and 0.5 m into the Arctic Ocean, for a total LIS contribution of 5.3 m. A LIS contribution of <30% to MWP-1A supports the hypothesis that a significant component of this MWP was sourced from the Antarctic Ice Sheet. Text Antarc* Antarctic Arctic Arctic Ocean Ice Sheet North Atlantic Unknown Antarctic Arctic Arctic Ocean The Antarctic |
institution |
Open Polar |
collection |
Unknown |
op_collection_id |
ftciteseerx |
language |
English |
description |
a b s t r a c t Planktonic and benthic d 18 O records adjacent to the runoff outlets of the Laurentide Ice Sheet (LIS) indicate that the LIS contributed to the abrupt w20 m rise in sea level w14.6 ka, Meltwater Pulse 1A (MWP-1A). However, the magnitude of the LIS contribution still remains unresolved. Here, I use a freshwater runoff-ocean mixing model to calculate the LIS meltwater required to explain the decreases in planktonic and benthic d 18 O observed during MWP-1A at the southern, eastern and northern runoff outlets of the LIS. Maximum LIS contributions in equivalent sea level rise for a 500-year long MWP-1A are 2.7 m discharged into the Gulf of Mexico as a combined hyperpycnal and hypopycnal flow, 2.1 m discharged into the North Atlantic, and 0.5 m into the Arctic Ocean, for a total LIS contribution of 5.3 m. A LIS contribution of <30% to MWP-1A supports the hypothesis that a significant component of this MWP was sourced from the Antarctic Ice Sheet. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Anders E Carlson |
spellingShingle |
Anders E Carlson Geochemical constraints on the Laurentide Ice Sheet contribution to Meltwater Pulse 1A |
author_facet |
Anders E Carlson |
author_sort |
Anders E Carlson |
title |
Geochemical constraints on the Laurentide Ice Sheet contribution to Meltwater Pulse 1A |
title_short |
Geochemical constraints on the Laurentide Ice Sheet contribution to Meltwater Pulse 1A |
title_full |
Geochemical constraints on the Laurentide Ice Sheet contribution to Meltwater Pulse 1A |
title_fullStr |
Geochemical constraints on the Laurentide Ice Sheet contribution to Meltwater Pulse 1A |
title_full_unstemmed |
Geochemical constraints on the Laurentide Ice Sheet contribution to Meltwater Pulse 1A |
title_sort |
geochemical constraints on the laurentide ice sheet contribution to meltwater pulse 1a |
publishDate |
2009 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1081.8053 http://geoscience.wisc.edu/geoscience/wp-content/uploads/2010/07/carlson_2009_qsr.pdf |
geographic |
Antarctic Arctic Arctic Ocean The Antarctic |
geographic_facet |
Antarctic Arctic Arctic Ocean The Antarctic |
genre |
Antarc* Antarctic Arctic Arctic Ocean Ice Sheet North Atlantic |
genre_facet |
Antarc* Antarctic Arctic Arctic Ocean Ice Sheet North Atlantic |
op_source |
http://geoscience.wisc.edu/geoscience/wp-content/uploads/2010/07/carlson_2009_qsr.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1081.8053 http://geoscience.wisc.edu/geoscience/wp-content/uploads/2010/07/carlson_2009_qsr.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766270625599455232 |