Dá tempo mudar todos os livros escolares que falam em "aquecimento global urgente"?
Estudo publicado na Nature Geoscience apontou que o mundo pode ter nova Era do Gelo.
A lógica do estudo é que um aumento do gelo nos oceanos pode alterar a circulação dos oceanos e isso levaria a uma reversão do efeito estufa pois enquanto o nível do dióxido de carbono nos oceanos aumenta, na atmosfera diminui. Eu entendi que o estudo quer dizer que há uma captura do dióxido de carbono pelos oceanos e assim esfria o planeta.
Não sei, acho que a base do artigo - dióxido de carbono - é problemática. Mas não sou climatologista.
Em todo caso, uma era do gelo ou esfriamento é muito mais catastrófico para a vida no planeta, coisa que os livros escolares não falam.
Vejam parte do texto abaixo com a descrição do artigo feito pela Fox News:
Explosion
in Antarctic sea ice levels may cause another ice age
Upside-down
"rivers" of warm ocean water may be one of the causes of
Antarctica's ice shelves breaking up, leading to a rise in sea levels. But a
new study suggests an increase in sea ice may lead to a much more devastating
change in the Earth's climate — another ice age.
Using computer simulations, the research
suggests that an increase in sea ice could significantly alter the circulation
of the ocean, ultimately leading to a reverse greenhouse effect as carbon
dioxide levels in the ocean increase and levels in the air decrease.
“One key question in the field is still what caused the Earth to periodically
cycle in and out of ice ages,” University of Chicago professor and the study's
co-author, Malte Jansen, said in a statement. “We are pretty confident that the carbon balance
between the atmosphere and ocean must have changed, but we don’t quite know how
or why."
The last major ice age ended at the end of the Pleistocene era, about 2.5 million years ago, as glaciers have periodically grown and then gotten smaller. Researchers believe that changes to the Earth's orbit may be partly responsible for some of the Earth's cooling, but additional factors have likely played a part, Jensen added.
...
Jansen pointed out that the Southern Ocean around Antarctica "plays a key role in ocean circulation" due to the deep waters in the region, leading it to have "outsize[d] consequences."
“What this suggests is that it’s a feedback loop,” said the study's lead author, Alice Marzocchi. “As the temperature drops, less carbon is released into the atmosphere, which triggers more cooling.”
...
The research has been published in the scientific journal Nature Geoscience.
