guisilva5000
Super Célula
Só facto da cimeira ser feita no Dubai já é irónico...
Aquecimento Global
- Thread starter Minho
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StormRic
Furacão
Nunca lançámos tanto CO2 para a atmosfera como em 2023
Emissões de gases com efeito de estufa têm-se mantido estáveis na última década, com pequenos aumentos, mas para evitar dois graus de aquecimento global é preciso reduzi-las a pique.
www.publico.pt
StormRic
Furacão
A COP28 quer pôr o mundo a falar do que comemos. Porquê?
Pela primeira vez numa cimeira do clima admite-se o elo entre alimentação e crise climática. No Dubai, 134 países comprometeram-se a mudar os sistemas alimentares. Vem aí uma revolução no que comemos?
www.publico.pt
StormRic
Furacão
Mas em contrapartida a alteração climática e a poluição podem estar a reduzir o volume ou alterar o comportamento de algumas espécies do complexo plâncton.
Apenas um extracto deste artigo (que não dispensa a leitura completa): https://news.climate.columbia.edu/2...n-earth-how-is-climate-change-affecting-them/
"
How is climate change affecting plankton?
Because of the enormous diversity in the plankton world, it’s unlikely that the many different kinds of organisms would have a universal response to any given stress from climate change.
Some climate models project that warming temperatures will alter ocean currents, reducing the amount of nutrients that well up from the deep ocean, resulting in fewer phytoplankton. With fewer phytoplankton, the ability of the oceans to sequester carbon dioxide would likely be hampered, leaving more in the atmosphere to exacerbate climate change.
A recent study found that warming temperatures cause certain phytoplankton to change from carbon absorbers to carbon emitters, a potential and unanticipated climate tipping point. Some phytoplankton are mixotrophs, meaning they can get energy either through photosynthesis or by eating other organisms. When they perform photosynthesis, they take carbon out of the atmosphere; but when they eat other organisms, they end up emitting more CO2 than they absorb. "
StormRic
Furacão
Excelentes recolhas de artigos, como sempre, obrigado!
StormRic
Furacão
Junta da Andaluzia admite comprar água a Portugal para dar de beber às populações
Água será fornecida por Alqueva, enviada para o porto de Huelva e transportada de navio para suprir o consumo humano onde a escassez hídrica é mais acentuada. É uma solução de último recurso.
www.publico.pt
Não sei se este será o tópico mais indicado para esta notícia, ou o da seca em Portugal.
Mas lá que é bizarra, é.
O ridículo já chega a colocar apostas nos dois lados. Afinal essa é a táctica por detrás da mudança narrativa do Aquecimento Global para algo não falsificável como Mudanças Climáticas que sempre ocorreram...
A further climate report has now appeared exactly at the global climate summit, warning of a climate catastrophe for Europe. This time, however, not from the heat, but from an ice age.
Ice cold instead of heat? A new climate report, just in time for the International Climate Summit in Dubai, warns of the start of a Europe-wide ice age. The Tipping Point report, prepared by an international team of 200 researchers and funded by the Bezos Earth Fund, is the latest in a series of warnings about the "most extreme effects of climate change".
Tim Lenton, professor of climate change at the University of Exeter in the UK and author of the study, warns that Earth is about to cross dangerous "turning points" that are not in global warming, as climate ideologists always describe, but in an ice age in Europe could lead.
Ice age instead of heat? - disagreement about panic
Once again, a new climate report warns that the earth could soon exceed dangerous “turning points”. But this time, unlike previous reports, the content of the warning is not just a warning of a heating earth, no, much more should Europe worry about an upcoming ice age. So now it takes panic of excessive heat and cold?
According to the author of the study, Tim Lenton, professor of climate change at the University of Exeter, probably yes. In his study, he speaks of a possible change in the subpolar vortex in the North Atlantic, which could have serious consequences for Europe. The last time we had something like that, "this led to a small ice age in Europe," explains the climate researcher. According to Lenton, a change in the vertebrae could result in colder, snowy winters and hot summers, shorten the vegetation period of the crops and endanger the water supply in Europe. Our society is not prepared for such a development, says Lenton
Five tipping points at the end of the world
In the study, Lenton speaks of five so-called tipping points, in front of which the earth would be and which could endanger humanity in the future. In the cryosphere (everything related to ice and snow), the study found, there was evidence of large-scale tipping points in the ice sheets of Greenland and Antarctica as well as local tipping points in glaciers and permafrost soils.
In the biosphere, there are tipping points in a variety of ecosystems, including forest extinction in the Amazon region, the destruction of savannas and arid areas, the eutrophication of lakes, the death of coral reefs and mangroves, and the collapse of some fisheries.
In the ocean-atmospheric circulation, there are indications that the upheavals in the Atlantic and southern oceans as well as the West African monsoons have reached a turning point. Some tipping points of the earth system could already be within reach, says Lenton. Ecosystems such as Antarctica or the Amazon rainforest would currently provide something like early warning systems that they could soon "tilt", the study said.
Either way, it would be necessary to take massive measures to stop greenhouse gas emissions as soon as possible, the study concludes. Whether heat wave or icy cold, the solutions sound similar to those of other climate reports.
Traduzido do Alemão.
https://apollo-news.net/neue-klimastudie-warnt-jetzt-vor-eiszeit-statt-hitze-in-europa/
New climate study now warns of ice age instead of heat in Europe
A further climate report has now appeared exactly at the global climate summit, warning of a climate catastrophe for Europe. This time, however, not from the heat, but from an ice age.
Ice cold instead of heat? A new climate report, just in time for the International Climate Summit in Dubai, warns of the start of a Europe-wide ice age. The Tipping Point report, prepared by an international team of 200 researchers and funded by the Bezos Earth Fund, is the latest in a series of warnings about the "most extreme effects of climate change".
Tim Lenton, professor of climate change at the University of Exeter in the UK and author of the study, warns that Earth is about to cross dangerous "turning points" that are not in global warming, as climate ideologists always describe, but in an ice age in Europe could lead.
Ice age instead of heat? - disagreement about panic
Once again, a new climate report warns that the earth could soon exceed dangerous “turning points”. But this time, unlike previous reports, the content of the warning is not just a warning of a heating earth, no, much more should Europe worry about an upcoming ice age. So now it takes panic of excessive heat and cold?
According to the author of the study, Tim Lenton, professor of climate change at the University of Exeter, probably yes. In his study, he speaks of a possible change in the subpolar vortex in the North Atlantic, which could have serious consequences for Europe. The last time we had something like that, "this led to a small ice age in Europe," explains the climate researcher. According to Lenton, a change in the vertebrae could result in colder, snowy winters and hot summers, shorten the vegetation period of the crops and endanger the water supply in Europe. Our society is not prepared for such a development, says Lenton
Five tipping points at the end of the world
In the study, Lenton speaks of five so-called tipping points, in front of which the earth would be and which could endanger humanity in the future. In the cryosphere (everything related to ice and snow), the study found, there was evidence of large-scale tipping points in the ice sheets of Greenland and Antarctica as well as local tipping points in glaciers and permafrost soils.
In the biosphere, there are tipping points in a variety of ecosystems, including forest extinction in the Amazon region, the destruction of savannas and arid areas, the eutrophication of lakes, the death of coral reefs and mangroves, and the collapse of some fisheries.
In the ocean-atmospheric circulation, there are indications that the upheavals in the Atlantic and southern oceans as well as the West African monsoons have reached a turning point. Some tipping points of the earth system could already be within reach, says Lenton. Ecosystems such as Antarctica or the Amazon rainforest would currently provide something like early warning systems that they could soon "tilt", the study said.
Either way, it would be necessary to take massive measures to stop greenhouse gas emissions as soon as possible, the study concludes. Whether heat wave or icy cold, the solutions sound similar to those of other climate reports.
Traduzido do Alemão.
https://apollo-news.net/neue-klimastudie-warnt-jetzt-vor-eiszeit-statt-hitze-in-europa/
Transcrevendo parâgrafos correspondentes ao 5º ano de escolaridade :
" O sistema Terra é formado por quatro subsistemas abertos e dinâmicos, que interagem entre si: a geosfera (ou litosfera), a hidrosfera, a atmosfera e a biosfera. Estes subsistemas, intimamente relacionados uns com os outros, encontram-se em equilíbrio dinâmico.
A alteração do estado de equilíbrio de um dos subsistemas da Terra pode ter repercussões nos restantes subsistemas. Uma vez que a Terra é um sistema fechado, o desequilíbrio de qualquer um dos subsistemas é potencialmente perigoso. A atividade humana, um componente da biosfera, constitui um grande fator de desequilíbrio que interfere com todos os subsistemas terrestres. "
Última edição:
Nao é novidade para ninguém que o clima ameno da Europa é principalmente afetada pela circulacao do Altantico. Se essa circulacao parar, é natural que o clima da Europa arrefeca.
Aristocrata
Super Célula
Bizarro certamente.Não sei se este será o tópico mais indicado para esta notícia, ou o da seca em Portugal.Junta da Andaluzia admite comprar água a Portugal para dar de beber às populações
Água será fornecida por Alqueva, enviada para o porto de Huelva e transportada de navio para suprir o consumo humano onde a escassez hídrica é mais acentuada. É uma solução de último recurso.
Mas lá que é bizarra, é.
O problema de água potável pode-se colocar em certas aldeias, e na zona de Cádiz como diz o artigo, mas não à Andaluzia como um todo.
Mas, há sempre um "mas" aqui:
Ora, analisando melhor a questão, lá como cá, a agricultura que exige grandes recursos hídricos, pede água.
Não é fácil resolver esta questão, o equilíbrio é difícil.
Espanha pode muito bem fechar a torneira que alimenta o Guadiana e usar em proveito próprio, e já o faz no Rio Tejo.
Só que há um convénio assinado entre os países, porque estamos na União Europeia tem de ser cumpridos. E sabemos que por vezes não o são...
O que a Andaluzia pede pode perfeitamente ser feito, mas o trabalho de lá tem de ser feito no sentido de evitar gastos desnecessários, perdas de água - sabemos que os canais as têm, e limitar o suo em certas actividades.
Do lado de cá também temos problemas, temos agricultura e temos turismo.
StormRic
Furacão
Fogos florestais do Canadá emitiram 23% do CO2 mundial a nível de incêndios
Relatório anual do Copérnico mostra que incêndios florestais no Canadá foram a “história mais significativa” em 2023. Ao todo, mundo emitiu 7700 megatoneladas de dióxido de carbono nestes fenómenos.
www.publico.pt