Eu decidi criar esse blog no sentido de buscar a mudança de conduta no que diz respeito ao exercício de cidadania. Todos sabem das dificuldades enfrentadas pelos cidadãos e cidadãs desse Brasil afora. Importante ressaltar que as manifestações podem ser feitas livremente, no entanto, não podemos esquecer que o respeito está consubstanciado na reciprocidade.
quarta-feira, 28 de novembro de 2012
Thawing of Permafrost Expected to Cause Significant Additional Global Warming
O permafrost, solo permanentemente congelado que cobre quase um quarto do Hemisfério Norte
and Climate Scientists Must Monitor and Prepare for Large Carbon
Dioxide and Methane Emissions from Permafrost, Says UNEP Report
covering almost a quarter of the northern hemisphere contains 1,700
gigatonnes of carbon, twice that currently in the atmosphere, and
could significantly amplify global warming should thawing accelerate
as expected, according to a new report released today by the UN
Environment Programme (UNEP).
permafrost can also radically change ecosystems and cause costly
infrastructural damage due to increasingly unstable ground, the
Implications of Warming Permafrost seeks
to highlight the potential hazards of carbon dioxide and methane
emissions from warming permafrost, which have not thus far been
included in climate-prediction modelling. The science on the
potential impacts of warming permafrost has only begun to enter the
mainstream in the last few years, and as a truly “emerging issue”
could not have been included in climate change modelling to date.
recommends a special IPCC assessment on permafrost and the creation
of national monitoring networks and adaptation plans as key steps to
deal with potential impacts of this significant source of emissions,
which may become a major factor in global warming. Continue reading