Dois artigos. O primeiro é mais um ponto da situação. O segundo é uma tese sobre a origem da pequena idade do gelo: é convincente, e logo pode ser mais uma evidência .... Leituras recomendadas na totalidade.
WRI's Review of Climate Science 2009-2010: "As a Whole, the Literature Paints a Bleak Picture" | ThinkProgressWhat are the key findings of this scientific review?
Did Columbus Cause Europe's Little Ice Age? | Informed Comment
This story is irresistible for a world historian interested in climate change.Richard Nevle, a geochemist at Stanford, argues that the European advent in the New World, which killed 90% of the 80 million native Americans, caused the Little Ice Age. The native peoples of the New World burned a lot of wood. When they largely didn’t exist anymore, because they suffered high mortality from a host of European diseases to which they had no immunity, they stopped putting carbon dioxide in the atmosphere. Instead, forests grew rapidly since they weren’t being chopped down anymore, and land wasn’t being cleared for agriculture. Forests take in carbon dioxide and exhale oxygen, plus they fix some carbon dioxide in the soil. They are what is called a “carbon sink,” though not a really efficient one, since much of the carbon they take out of the atmosphere eventually finds its way back there. I suspect the dramatic fall-off in the burning of fossil fuels was the much more important cause here.