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Papers by elisabeth Michel

Research paper thumbnail of Simulating the growth and distribution of planktic foraminifer using an ecophysiological multi-species model

Biogeosciences Discussions, 2011

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Research paper thumbnail of Persistent influence of ice sheet melting on high northern latitude climate during the early Last Interglacial

Climate of The Past Discussions, 2011

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Research paper thumbnail of Carbon isotope records reveal precise timing of enhanced Southern Ocean upwelling during the last deglaciation

Nature Communications, 2013

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Research paper thumbnail of Constraint of the CO2 rise by new atmospheric carbon isotopic measurements during the last deglaciation

Global Biogeochemical …, 2010

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Research paper thumbnail of Constraint of the CO2 rise by new atmospheric carbon isotopic measurements during the last deglaciation

Global Biogeochemical …, 2010

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Research paper thumbnail of Mediterranean Sea Surface Radiocarbon Reservoir Age Changes Since the Last Glacial Maximum

Science, 2001

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Research paper thumbnail of Geomagnetic field intensity, North Atlantic Deep Water circulation and atmospheric Δ 14C during the last 50 kyr

Earth and Planetary Science Letters, 2002

We present simulated records of past changes in the atmospheric Δ 14 C for the last 50 kyr due to... more We present simulated records of past changes in the atmospheric Δ 14 C for the last 50 kyr due to changes in geomagnetic field intensity and in the strength of the North Atlantic Deep Water (NADW). A new geomagnetic record was used, largely based on the NAPIS-75 record ...

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Research paper thumbnail of Distant origin of circulation changes in the Indian Ocean during the last deglaciation

Earth and Planetary Science Letters, 2006

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Research paper thumbnail of Evidence for changes in the North Atlantic Deep Water linked to meltwater surges during the Heinrich events

Earth and Planetary Science Letters, 1997

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Research paper thumbnail of Could deep subantarctic convection feed the world deep basins during the last glacial maximum

Paleoceanography, 1995

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Research paper thumbnail of The timing of the last deglaciation in North Atlantic climate records

Nature, 2001

To determine the mechanisms governing the last deglaciation and the sequence of events that lead ... more To determine the mechanisms governing the last deglaciation and the sequence of events that lead to deglaciation, it is important to obtain a temporal framework that applies to both continental and marine climate records. Radiocarbon dating has been widely used to derive calendar dates for marine sediments, but it rests on the assumption that the `apparent age' of surface water (the age of surface water relative to the atmosphere) has remained constant over time. Here we present new evidence for variation in the apparent age of surface water (or reservoir age) in the North Atlantic ocean north of 40°N over the past 20,000 years. In two cores we found apparent surface-water ages to be larger than those of today by 1,230 +/- 600 and 1,940 +/- 750 years at the end of the Heinrich 1 surge event (15,000 years BP) and by 820 +/- 430 to 1,010 +/- 340 years at the end of the Younger Dryas cold episode. During the warm Bølling-Allerød period, between these two periods of large reservoir ages, apparent surface-water ages were comparable to present values. Our results allow us to reconcile the chronologies from ice cores and the North Atlantic marine records over the entire deglaciation period. Moreover, the data imply that marine carbon dates from the North Atlantic north of 40°N will need to be corrected for these highly variable effects.

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Research paper thumbnail of Geomagnetic-assisted stratigraphy and sea surface temperature changes in core MD94-103 (Southern Indian Ocean): possible implications for North–South climatic relationships around H4

Earth and Planetary Science Letters, 2002

New records of past sea surface temperatures (SSTs) were derived in the 30–50 kyr B.P. time inter... more New records of past sea surface temperatures (SSTs) were derived in the 30–50 kyr B.P. time interval from a core located at 45°S in the Southern Indian Ocean, MD94-103. To investigate the climatic phasing between the Southern Indian Ocean, the Greenland and the Antarctic ice, the magnetic signal of core MD94-103 was synchronized at better than millennial accuracy in the

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Research paper thumbnail of Changes in deep water hydrology during the Last Deglaciation

Comptes Rendus Geoscience, 2005

Changes in benthic foraminifera δ18O and δ13C have been followed over the last deglaciation perio... more Changes in benthic foraminifera δ18O and δ13C have been followed over the last deglaciation period in seven sediment cores from different water depths in the North Atlantic, Indian and Pacific Ocean. The two periods of most rapid δ18O changes, at about 17 and 12 ka, are recorded in all intermediate water cores simultaneously with the penetration of brines formed along

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Research paper thumbnail of Midlatitude Southern Indian Ocean response to Northern Hemisphere Heinrich events

Earth and Planetary Science Letters, 2005

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Research paper thumbnail of Sea-level and deep water temperature changes derived from benthic foraminifera isotopic records

Quaternary Science Reviews, 2002

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Research paper thumbnail of Ventilation of the Deep Southern Ocean and Deglacial CO2 Rise

Science, 2010

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Research paper thumbnail of Evidence for northward expansion of Antarctic Bottom Water mass in the Southern Ocean during the last glacial inception

Paleoceanography, 2009

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Research paper thumbnail of Simulating the growth and distribution of planktic foraminifer using an ecophysiological multi-species model

Biogeosciences Discussions, 2011

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Research paper thumbnail of Persistent influence of ice sheet melting on high northern latitude climate during the early Last Interglacial

Climate of The Past Discussions, 2011

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Carbon isotope records reveal precise timing of enhanced Southern Ocean upwelling during the last deglaciation

Nature Communications, 2013

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Research paper thumbnail of Constraint of the CO2 rise by new atmospheric carbon isotopic measurements during the last deglaciation

Global Biogeochemical …, 2010

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Research paper thumbnail of Constraint of the CO2 rise by new atmospheric carbon isotopic measurements during the last deglaciation

Global Biogeochemical …, 2010

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Research paper thumbnail of Mediterranean Sea Surface Radiocarbon Reservoir Age Changes Since the Last Glacial Maximum

Science, 2001

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Research paper thumbnail of Geomagnetic field intensity, North Atlantic Deep Water circulation and atmospheric Δ 14C during the last 50 kyr

Earth and Planetary Science Letters, 2002

We present simulated records of past changes in the atmospheric Δ 14 C for the last 50 kyr due to... more We present simulated records of past changes in the atmospheric Δ 14 C for the last 50 kyr due to changes in geomagnetic field intensity and in the strength of the North Atlantic Deep Water (NADW). A new geomagnetic record was used, largely based on the NAPIS-75 record ...

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Research paper thumbnail of Distant origin of circulation changes in the Indian Ocean during the last deglaciation

Earth and Planetary Science Letters, 2006

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Evidence for changes in the North Atlantic Deep Water linked to meltwater surges during the Heinrich events

Earth and Planetary Science Letters, 1997

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Could deep subantarctic convection feed the world deep basins during the last glacial maximum

Paleoceanography, 1995

Bookmarks Related papers MentionsView impact

Research paper thumbnail of The timing of the last deglaciation in North Atlantic climate records

Nature, 2001

To determine the mechanisms governing the last deglaciation and the sequence of events that lead ... more To determine the mechanisms governing the last deglaciation and the sequence of events that lead to deglaciation, it is important to obtain a temporal framework that applies to both continental and marine climate records. Radiocarbon dating has been widely used to derive calendar dates for marine sediments, but it rests on the assumption that the `apparent age' of surface water (the age of surface water relative to the atmosphere) has remained constant over time. Here we present new evidence for variation in the apparent age of surface water (or reservoir age) in the North Atlantic ocean north of 40°N over the past 20,000 years. In two cores we found apparent surface-water ages to be larger than those of today by 1,230 +/- 600 and 1,940 +/- 750 years at the end of the Heinrich 1 surge event (15,000 years BP) and by 820 +/- 430 to 1,010 +/- 340 years at the end of the Younger Dryas cold episode. During the warm Bølling-Allerød period, between these two periods of large reservoir ages, apparent surface-water ages were comparable to present values. Our results allow us to reconcile the chronologies from ice cores and the North Atlantic marine records over the entire deglaciation period. Moreover, the data imply that marine carbon dates from the North Atlantic north of 40°N will need to be corrected for these highly variable effects.

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Geomagnetic-assisted stratigraphy and sea surface temperature changes in core MD94-103 (Southern Indian Ocean): possible implications for North–South climatic relationships around H4

Earth and Planetary Science Letters, 2002

New records of past sea surface temperatures (SSTs) were derived in the 30–50 kyr B.P. time inter... more New records of past sea surface temperatures (SSTs) were derived in the 30–50 kyr B.P. time interval from a core located at 45°S in the Southern Indian Ocean, MD94-103. To investigate the climatic phasing between the Southern Indian Ocean, the Greenland and the Antarctic ice, the magnetic signal of core MD94-103 was synchronized at better than millennial accuracy in the

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Changes in deep water hydrology during the Last Deglaciation

Comptes Rendus Geoscience, 2005

Changes in benthic foraminifera δ18O and δ13C have been followed over the last deglaciation perio... more Changes in benthic foraminifera δ18O and δ13C have been followed over the last deglaciation period in seven sediment cores from different water depths in the North Atlantic, Indian and Pacific Ocean. The two periods of most rapid δ18O changes, at about 17 and 12 ka, are recorded in all intermediate water cores simultaneously with the penetration of brines formed along

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Midlatitude Southern Indian Ocean response to Northern Hemisphere Heinrich events

Earth and Planetary Science Letters, 2005

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Sea-level and deep water temperature changes derived from benthic foraminifera isotopic records

Quaternary Science Reviews, 2002

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Ventilation of the Deep Southern Ocean and Deglacial CO2 Rise

Science, 2010

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Evidence for northward expansion of Antarctic Bottom Water mass in the Southern Ocean during the last glacial inception

Paleoceanography, 2009

Bookmarks Related papers MentionsView impact