Comment on egusphere-2024-819 DOI Creative Commons

Sam Sherriff-Tadano

Published: May 15, 2024

Abstract. Dansgaard-Oeschger (DO) events are a pervasive feature of glacial climates. It is widely accepted that the associated changes in climate, which most pronounced North Atlantic region, caused by abrupt strength and/or latitude reach meridional overturning circulation (AMOC), possibly originating from spontaneous transitions ocean-sea-ice-atmosphere system. Here we use an Earth System Model produces DO-like to show climate conditions under millennial-scale AMOC variations occur controlled surface ocean buoyancy flux. In particular, find present day-like convection pattern with deep water formation Labrador and Nordic Seas becomes unstable when flux integrated over northern turns negative positive. proximity this point model between different patterns strong weak states. The depends on freshwater heat fluxes sea temperature through dependence thermal expansion coefficient seawater. We larger ice sheets tend stabilize decreasing net while CO2-induced cooling decreases loss destabilizes convection. These results help explain DO appear, step towards improved understanding mechanisms changes. 

Language: Английский

Hydroclimate variability over East Asia linked to ocean circulation, Antarctic and Pacific temperature changes during the LGM DOI
Hongyun Lu,

Fucai Duan,

Zhenqiu Zhang

et al.

Palaeogeography Palaeoclimatology Palaeoecology, Journal Year: 2025, Volume and Issue: unknown, P. 112781 - 112781

Published: Jan. 1, 2025

Language: Английский

Citations

0
Multicentennial-scale coupling of the East Asian monsoon to North Atlantic climates during the Last Glacial Maximum DOI

Yingfang Cui,

Yijia Liang, Kan Zhao

et al.

Palaeogeography Palaeoclimatology Palaeoecology, Journal Year: 2024, Volume and Issue: 654, P. 112445 - 112445

Published: Aug. 17, 2024

Language: Английский

Citations

2
Surface buoyancy control of millennial-scale variations of the Atlantic meridional ocean circulation DOI Creative Commons
Matteo Willeit, Andrey Ganopolski, Neil R. Edwards

et al.

Published: March 25, 2024

Abstract. Dansgaard-Oeschger (DO) events are a pervasive feature of glacial climates. It is widely accepted that the associated changes in climate, which most pronounced North Atlantic region, caused by abrupt strength and/or latitude reach meridional overturning circulation (AMOC), possibly originating from spontaneous transitions ocean-sea-ice-atmosphere system. Here we use an Earth System Model produces DO-like to show climate conditions under millennial-scale AMOC variations occur controlled surface ocean buoyancy flux. In particular, find present day-like convection pattern with deep water formation Labrador and Nordic Seas becomes unstable when flux integrated over northern turns negative positive. proximity this point model between different patterns strong weak states. The depends on freshwater heat fluxes sea temperature through dependence thermal expansion coefficient seawater. We larger ice sheets tend stabilize decreasing net while CO2-induced cooling decreases loss destabilizes convection. These results help explain DO appear, step towards improved understanding mechanisms changes.

Language: Английский

Citations

1
Centennial‐Scale Variability of the Atlantic Meridional Overturning Circulation in CMIP6 Models Shaped by Arctic–North Atlantic Interactions and Sea Ice Biases DOI Creative Commons
Oliver Mehling, Katinka Bellomo, Jost von Hardenberg

et al.

Geophysical Research Letters, Journal Year: 2024, Volume and Issue: 51(20)

Published: Oct. 28, 2024

Abstract Climate variability on centennial timescales has often been linked to internal of the Atlantic Meridional Overturning Circulation (AMOC). However, due scarceness suitable paleoclimate proxies and long climate model simulations, large uncertainties remain magnitude physical mechanisms driving centennial‐scale AMOC variability. For these reasons, we perform a systematic multi‐model comparison in pre‐industrial control simulations state‐of‐the‐art global models. Six out nine models this study exhibit statistically significant mode Our results show that freshwater exchanges between Arctic Ocean North provide plausible mechanism subset models, can be amplified by ocean–sea ice feedbacks Labrador Sea. The amplifying is sea cover biases, which could an observational constraint for

Language: Английский

Citations

1
Editor Comment on egusphere-2024-819 DOI Creative Commons

Christo Buizert

Published: May 21, 2024

Abstract. Dansgaard-Oeschger (DO) events are a pervasive feature of glacial climates. It is widely accepted that the associated changes in climate, which most pronounced North Atlantic region, caused by abrupt strength and/or latitude reach meridional overturning circulation (AMOC), possibly originating from spontaneous transitions ocean-sea-ice-atmosphere system. Here we use an Earth System Model produces DO-like to show climate conditions under millennial-scale AMOC variations occur controlled surface ocean buoyancy flux. In particular, find present day-like convection pattern with deep water formation Labrador and Nordic Seas becomes unstable when flux integrated over northern turns negative positive. proximity this point model between different patterns strong weak states. The depends on freshwater heat fluxes sea temperature through dependence thermal expansion coefficient seawater. We larger ice sheets tend stabilize decreasing net while CO2-induced cooling decreases loss destabilizes convection. These results help explain DO appear, step towards improved understanding mechanisms changes. 

Language: Английский

Citations

0
Reply on RC2 DOI Creative Commons

Matteo Willeit

Published: June 18, 2024

Abstract. Dansgaard-Oeschger (DO) events are a pervasive feature of glacial climates. It is widely accepted that the associated changes in climate, which most pronounced North Atlantic region, caused by abrupt strength and/or latitude reach meridional overturning circulation (AMOC), possibly originating from spontaneous transitions ocean-sea-ice-atmosphere system. Here we use an Earth System Model produces DO-like to show climate conditions under millennial-scale AMOC variations occur controlled surface ocean buoyancy flux. In particular, find present day-like convection pattern with deep water formation Labrador and Nordic Seas becomes unstable when flux integrated over northern turns negative positive. proximity this point model between different patterns strong weak states. The depends on freshwater heat fluxes sea temperature through dependence thermal expansion coefficient seawater. We larger ice sheets tend stabilize decreasing net while CO2-induced cooling decreases loss destabilizes convection. These results help explain DO appear, step towards improved understanding mechanisms changes. 

Language: Английский

Citations

0
Reply on RC3 DOI Creative Commons

Matteo Willeit

Published: June 18, 2024

Abstract. Dansgaard-Oeschger (DO) events are a pervasive feature of glacial climates. It is widely accepted that the associated changes in climate, which most pronounced North Atlantic region, caused by abrupt strength and/or latitude reach meridional overturning circulation (AMOC), possibly originating from spontaneous transitions ocean-sea-ice-atmosphere system. Here we use an Earth System Model produces DO-like to show climate conditions under millennial-scale AMOC variations occur controlled surface ocean buoyancy flux. In particular, find present day-like convection pattern with deep water formation Labrador and Nordic Seas becomes unstable when flux integrated over northern turns negative positive. proximity this point model between different patterns strong weak states. The depends on freshwater heat fluxes sea temperature through dependence thermal expansion coefficient seawater. We larger ice sheets tend stabilize decreasing net while CO2-induced cooling decreases loss destabilizes convection. These results help explain DO appear, step towards improved understanding mechanisms changes. 

Language: Английский

Citations

0
Reply on RC1 DOI Creative Commons

Matteo Willeit

Published: June 18, 2024

Abstract. Dansgaard-Oeschger (DO) events are a pervasive feature of glacial climates. It is widely accepted that the associated changes in climate, which most pronounced North Atlantic region, caused by abrupt strength and/or latitude reach meridional overturning circulation (AMOC), possibly originating from spontaneous transitions ocean-sea-ice-atmosphere system. Here we use an Earth System Model produces DO-like to show climate conditions under millennial-scale AMOC variations occur controlled surface ocean buoyancy flux. In particular, find present day-like convection pattern with deep water formation Labrador and Nordic Seas becomes unstable when flux integrated over northern turns negative positive. proximity this point model between different patterns strong weak states. The depends on freshwater heat fluxes sea temperature through dependence thermal expansion coefficient seawater. We larger ice sheets tend stabilize decreasing net while CO2-induced cooling decreases loss destabilizes convection. These results help explain DO appear, step towards improved understanding mechanisms changes. 

Language: Английский

Citations

0
Speed changes of the continental slope currents in the SW atlantic in the last 45,000 years DOI
Renata Hanae Nagai, Silvia Helena de Mello e Sousa, Rafaela Nogueira Mendonça Mendes

et al.

Quaternary Science Reviews, Journal Year: 2024, Volume and Issue: 349, P. 109143 - 109143

Published: Dec. 13, 2024

Language: Английский

Citations

0
Surface buoyancy control of millennial-scale variations in the Atlantic meridional ocean circulation DOI Creative Commons
Matteo Willeit, Andrey Ganopolski, Neil R. Edwards

et al.

Climate of the past, Journal Year: 2024, Volume and Issue: 20(12), P. 2719 - 2739

Published: Dec. 16, 2024

Abstract. Dansgaard–Oeschger (DO) events are a pervasive feature of glacial climates. It is widely accepted that the associated changes in climate, which most pronounced North Atlantic region, caused by abrupt strength and/or northward extent meridional overturning circulation (AMOC), possibly originating from spontaneous transitions ocean–sea-ice–atmosphere system. Here we use an Earth system model produces DO-like to show climate conditions under millennial-scale AMOC variations occur controlled surface ocean buoyancy flux. In particular, find present-day-like convection pattern with deep-water formation Labrador and Nordic seas becomes unstable when flux integrated over northern turns negative positive. proximity this point between different patterns strong weak states. The depends on freshwater heat fluxes sea temperature through dependence thermal expansion coefficient seawater. We larger ice sheets tend stabilize decreasing net flux, while CO2-induced cooling decreases loss destabilizes convection. These results help explain DO appear step towards improved understanding mechanisms changes.

Language: Английский

Citations

0