The Delicacy of the Oceanic Thermohaline Circulation

1993 ◽  
pp. 363-374
Author(s):  
James C. McWilliams
Keyword(s):  
Thermohaline Circulation

On the impact of sea ice in a global ocean circulation model

1997 ◽  
Vol 25 ◽  
pp. 111-115 ◽  
Author(s):  
Achim Stössel
Keyword(s):  
Southern Ocean ◽  
Sea Ice ◽  
Ocean Circulation ◽  
General Circulation ◽  
Thermohaline Circulation ◽  
Circulation Model ◽  
Deep Ocean ◽  
Global Ocean ◽  
Convective Activity ◽  
The Impact

This paper investigates the long-term impact of sea ice on global climate using a global sea-ice–ocean general circulation model (OGCM). The sea-ice component involves state-of-the-art dynamics; the ocean component consists of a 3.5° × 3.5° × 11 layer primitive-equation model. Depending on the physical description of sea ice, significant changes are detected in the convective activity, in the hydrographic properties and in the thermohaline circulation of the ocean model. Most of these changes originate in the Southern Ocean, emphasizing the crucial role of sea ice in this marginally stably stratified region of the world's oceans. Specifically, if the effect of brine release is neglected, the deep layers of the Southern Ocean warm up considerably; this is associated with a weakening of the Southern Hemisphere overturning cell. The removal of the commonly used “salinity enhancement” leads to a similar effect. The deep-ocean salinity is almost unaffected in both experiments. Introducing explicit new-ice thickness growth in partially ice-covered gridcells leads to a substantial increase in convective activity, especially in the Southern Ocean, with a concomitant significant cooling and salinification of the deep ocean. Possible mechanisms for the resulting interactions between sea-ice processes and deep-ocean characteristics are suggested.

Stability of the thermohaline circulation in a simple coupled model

1996 ◽  
Vol 48 (3) ◽  
pp. 465-476 ◽  
Author(s):  
Gerrit Lohmann ◽  
Rüdiger Gerdes ◽  
Deliang Chen
Keyword(s):  
Thermohaline Circulation ◽  
Coupled Model

scholarly journals Synergistic impacts of global warming and thermohaline circulation collapse on amphibians

2021 ◽  
Vol 4 (1) ◽  
Author(s):  
Julián A. Velasco ◽  
Francisco Estrada ◽  
Oscar Calderón-Bustamante ◽  
Didier Swingedouw ◽  
Carolina Ureta ◽  
...  
Keyword(s):  
Climate Change ◽  
Global Warming ◽  
Thermohaline Circulation ◽  
Climate Model ◽  
Global Climate ◽  
Extinction Risk ◽  
Meridional Overturning Circulation ◽  
Mitigation Strategies ◽  
Amphibian Species ◽  
Climate Conditions

AbstractImpacts on ecosystems and biodiversity are a prominent area of research in climate change. However, little is known about the effects of abrupt climate change and climate catastrophes on them. The probability of occurrence of such events is largely unknown but the associated risks could be large enough to influence global climate policy. Amphibians are indicators of ecosystems’ health and particularly sensitive to novel climate conditions. Using state-of-the-art climate model simulations, we present a global assessment of the effects of unabated global warming and a collapse of the Atlantic meridional overturning circulation (AMOC) on the distribution of 2509 amphibian species across six biogeographical realms and extinction risk categories. Global warming impacts are severe and strongly enhanced by additional and substantial AMOC weakening, showing tipping point behavior for many amphibian species. Further declines in climatically suitable areas are projected across multiple clades, and biogeographical regions. Species loss in regional assemblages is extensive across regions, with Neotropical, Nearctic and Palearctic regions being most affected. Results underline the need to expand existing knowledge about the consequences of climate catastrophes on human and natural systems to properly assess the risks of unabated warming and the benefits of active mitigation strategies.

Filtering of Milankovitch Cycles by the Thermohaline Circulation

1999 ◽  
Vol 12 (6) ◽  
pp. 1644-1658 ◽  
Author(s):  
David Brickman ◽  
D. G. Wright ◽  
William Hyde
Keyword(s):  
Thermohaline Circulation ◽  
Milankovitch Cycles

Stability and Variability of the Thermohaline Circulation

1993 ◽  
Vol 23 (1) ◽  
pp. 39-60 ◽  
Author(s):  
Andrew J. Weaver ◽  
Jochem Marotzke ◽  
Patrick F. Cummins ◽  
E. S. Sarachik
Keyword(s):  
Thermohaline Circulation

scholarly journals Large-scale response of the Eastern Mediterranean thermohaline circulation to African monsoon intensification during sapropel S1 formation

2017 ◽  
Vol 159 ◽  
pp. 139-154 ◽  
Author(s):  
T. Tesi ◽  
A. Asioli ◽  
D. Minisini ◽  
V. Maselli ◽  
G. Dalla Valle ◽  
...  
Keyword(s):  
Large Scale ◽  
Thermohaline Circulation ◽  
Eastern Mediterranean ◽  
African Monsoon ◽  
Scale Response

On the spontaneous transition to asymmetric thermohaline circulation

2004 ◽  
Vol 56 (1) ◽  
pp. 68-78 ◽  
Author(s):  
JOHAN NILSSON ◽  
GORAN BROSTROM ◽  
GOSTA WALIN
Keyword(s):  
Thermohaline Circulation ◽  
Spontaneous Transition

A low-order model for the response of the Atlantic thermohaline circulation to climate change

2004 ◽  
Vol 54 (1) ◽  
pp. 8-26 ◽  
Author(s):  
Kirsten Zickfeld ◽  
Thomas Slawig ◽  
Stefan Rahmstorf
Keyword(s):  
Climate Change ◽  
Thermohaline Circulation ◽  
Order Model ◽  
Atlantic Thermohaline Circulation ◽  
Low Order
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