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|a Implications of Arctic sea ice changes for North Atlantic deep convection and the meridional overturning circulation in CCSM4-CMIP5 simulations |h [electronic resource] |y English. |
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|a [S.l.] : |b American Geophysical Union, |c 2013. |
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|a Geophysical Research Letters Volume 40 |y English. |
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|a Please contact the owning institution for licensing and permissions. It is the user's responsibility to ensure use does not violate any third party rights. |
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|a Using CCSM4 climate simulations for 1850–2300 with
four different future forcing scenarios, we show that the
maximum strength of the Atlantic meridional overturning
circulation (MOC) decreases proportionally to the applied
CO2 forcing. This weakening of the overturning is caused
by a reduction or shut down of North Atlantic (NA) deep
convection due to a surface freshening. In the Labrador Sea,
the surface freshening is caused by strongly increased liquid
freshwater exports from the Arctic, which are largely due to
the decrease in the Arctic sea ice cover. In the strongest
forcing scenario (RCP8.5), the Arctic becomes summer icefree
by the end of the 21st century and year-round ice-free
by the end of the 23rd century. As a result of the associated
freshening, all NA deep convection ceases by 2145, which
leads to a 72% (18 Sv) decrease of the MOC strength by the
end of the simulation in 2300. |
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|a Electronic reproduction. |c Florida International University, |d 2015. |f (dpSobek) |n Mode of access: World Wide Web. |n System requirements: Internet connectivity; Web browser software. |
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|a North Atlantic Region. |
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|a dpSobek |c Sea Level Rise |
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|u http://dpanther.fiu.edu/dpService/dpPurlService/purl/FI15062130/00001 |y Click here for full text |
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|a http://dpanther.fiu.edu/sobek/content/FI/15/06/21/30/00001/FI15062130_thm.jpg |
