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2015 Warmest Year on Record
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<blockquote data-quote="awbuzz" data-source="post: 416855" data-attributes="member: 443"><p>Does this mean that if we just dump some salt into the Atlantic (increase salinity) that teh problem will go away? <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" /></p><p></p><p>"The same model simulates an AMOC collapse with a large 1-sverdrup (1 sverdrup = 106 m3/s) freshwater pulse (<a href="http://advances.sciencemag.org/content/3/1/e1601666.full#ref-14" target="_blank"><em>14</em></a>) that mimics major ice-sheet discharges into the North Atlantic in paleoclimate observations. The AMOC collapse is primarily caused by a halinely induced reduction of surface buoyancy (see fig. S6F and Materials and Methods for details) associated with an extreme freshening in the northern North Atlantic and GIN seas (fig. S6L). On the other hand, the current study uses a more realistic setting, that is, the CO2 increase for future global warming. The AMOC shutdown under global warming is primarily caused by a thermally induced buoyancy reduction (fig. S6B). The resultant buoyancy change (fig. S6A) is about one order of magnitude smaller (~0.1 sverdrup) than that in the hosing experiment (fig. S6D). Another important difference between the global warming and hosing scenarios is the response of atmospheric moisture transport from the Atlantic to the Pacific across Central America. Under global warming, the moisture transport intensifies because of atmospheric moisture increase, a negative feedback that increases Atlantic salinity (<a href="http://advances.sciencemag.org/content/3/1/e1601666.full#ref-31" target="_blank"><em>31</em></a>) and stabilizes the AMOC (<a href="http://advances.sciencemag.org/content/3/1/e1601666.full#ref-32" target="_blank"><em>32</em></a>–<a href="http://advances.sciencemag.org/content/3/1/e1601666.full#ref-34" target="_blank"><em>34</em></a>). However, this mechanism is generally absent in the hosing experiments (<a href="http://advances.sciencemag.org/content/3/1/e1601666.full#ref-34" target="_blank"><em>34</em></a>)."</p></blockquote><p></p>
[QUOTE="awbuzz, post: 416855, member: 443"] Does this mean that if we just dump some salt into the Atlantic (increase salinity) that teh problem will go away? :) "The same model simulates an AMOC collapse with a large 1-sverdrup (1 sverdrup = 106 m3/s) freshwater pulse ([URL='http://advances.sciencemag.org/content/3/1/e1601666.full#ref-14'][I]14[/I][/URL]) that mimics major ice-sheet discharges into the North Atlantic in paleoclimate observations. The AMOC collapse is primarily caused by a halinely induced reduction of surface buoyancy (see fig. S6F and Materials and Methods for details) associated with an extreme freshening in the northern North Atlantic and GIN seas (fig. S6L). On the other hand, the current study uses a more realistic setting, that is, the CO2 increase for future global warming. The AMOC shutdown under global warming is primarily caused by a thermally induced buoyancy reduction (fig. S6B). The resultant buoyancy change (fig. S6A) is about one order of magnitude smaller (~0.1 sverdrup) than that in the hosing experiment (fig. S6D). Another important difference between the global warming and hosing scenarios is the response of atmospheric moisture transport from the Atlantic to the Pacific across Central America. Under global warming, the moisture transport intensifies because of atmospheric moisture increase, a negative feedback that increases Atlantic salinity ([URL='http://advances.sciencemag.org/content/3/1/e1601666.full#ref-31'][I]31[/I][/URL]) and stabilizes the AMOC ([URL='http://advances.sciencemag.org/content/3/1/e1601666.full#ref-32'][I]32[/I][/URL]–[URL='http://advances.sciencemag.org/content/3/1/e1601666.full#ref-34'][I]34[/I][/URL]). However, this mechanism is generally absent in the hosing experiments ([URL='http://advances.sciencemag.org/content/3/1/e1601666.full#ref-34'][I]34[/I][/URL])." [/QUOTE]
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