¿y esos desalojos no pueden contribuir a una realimentación?
¿por ejemplo retrayendo la corriente del golfo?
Esos desalojos se producen siempre, son climatológicamente normales, y no sólo en forma de hielo, sino también en forma de agua líquida ártica, de menor salinidad que la atlántica (parece que el volumen de agua desalojada en estado líquido es mayor que el de hielo).
Pero esos desalojos, para que pudieran afectar de un modo significativo a la circulación termohalina, deberían ser muy masivos. En los últimos años, incluido 2007, no se ha observado nada en una escala suficiente ni de lejos.
En la página 2 de este topic se comenta algo del tema.
https://foro.tiempo.com/climatologia/banquisa+en+el+artico+presente+y+futuro+del+hielo+marino-t80817.0.html;msg994908#msg994908
También aquí, actualizando algo más: https://foro.tiempo.com/climatologia/iquestse+aproxima+una+mini+edad+de+hielo-t92545.0.html;msg1819181#msg1819181
Algo más sobre el asunto:
"Major efforts since 2002 to document the nature of the Beaufort Gyre
have reported significant differences between the climatology of the 1990s
and the observed phenomenon characterizing post-2003 conditions. The
Beaufort Gyre contains significant amounts of fresh water within its ice
floes, but also within its circulating water column. Since the 1990s the
Gyre has reduced in surface area but gained up to 100,000 hectares
of additional fresh water since the 2000s began by tightening and accelerating
its circulation pattern (Proshutinsky et al. 2009). Freshwater
sources in the Arctic include flow from the Pacific Ocean, precipitation, ice
melt, and discharge from major river systems including the Ob, Yenisey,
and Lena of Russia and the Mackenzie of Canada. Scientists assumed
that Arctic fresh water flowed from the basin in balance with the input
from the various sources until observations showed large discrepancies
between the two estimates. More recently, researchers suggest that fresh
water is stored within Arctic circulation systems under certain conditions
and is then released when those conditions dissipate (Proshutinsky et al.
2008, McPhee et al. 2009, Proshutinsky et al. 2009). Scientists from the
Norwegian Polar Institute warn that fresh water is piling up in the Arctic
Ocean and that a change in the dominant wind direction could release
the largest amount of fresh water through Fram Strait ever recorded (NPI
2009, Holfort et al. 2009)."
http://www.unep.org/compendium2009/PDF/Ch2_compendium2009.pdfY el artículo de Proshutinsky citado:
http://www.whoi.edu/beaufortgyre/pdfs/2008JC005104-pip.pdfParece interesante.