Drought May Stunt Forests' Ability to Grow for Years. Forests are sometimes called the lungs of the earth—they breathe in carbon dioxide in the atmosphere and store it in tree trunks until the forest dies or burns.
A new study, however, shows that forests devastated by drought may lose their ability to store carbon over a much longer period than previously thought, reducing their role as a buffer between humans’ carbon emissions and a changing climate. The study, published Thursday in the journal Science by a team of by researchers at the University of Utah and Princeton University, shows that the world’s forests take an average of between two and four years to return to their normal growth and carbon dioxide absorption rate following a severe drought—a finding that has significant climate implications. Journaldelenvironnement. Fossil fuels the 'new sub-prime crisis' Staggering gains in solar power - and soon battery storage as well - threatens to undercut the oil industry with lightning speed ...
Writing in the conservative UK newspaper the Daily Telegraph, influential columnist Ambrose Evans-Pritchard writes that the "fossil industry is the subprime danger of this cycle". Oil and gas investment has soared and production has peaked but has yielded very little financial return: Mysterious Craters Are Just the Beginning of Arctic Surprises. It's not just craters purportedly dug by aliens in Russia, it's also megaslumps, ice that burns and drunken trees.
The ongoing meltdown of the permanently frozen ground that covers nearly a quarter of land in the Northern Hemisphere has caused a host of surprising arctic phenomena. Temperatures across the Arctic are warming roughly twice as fast as the rest of the globe, largely due to the reduction in the amount of sunlight reflecting off of white, snow-covered ground. What We Know. Now the two most famous scientific institutions in Britain and the US agree: 'Climate change is more certain than ever' The speed of global warming is now 10 times faster than at the end of the last ice age, which represents the most rapid period of sustained temperature change on a global scale in history - and there is no end in sight if carbon emissions continue to increase, the Royal Society and the US National Academy of Sciences have warned.
Concentrations of carbon dioxide in the atmosphere are the highest for at least 800,000 years and 40 per cent higher than they were in the 19th century. Swiss wildlife climbing up the mountains - News in Brief. Animals and plants are already today adapting to the rising temperatures at a surprising pace.
Alpine ecosystems are on the rise. Between 2003 and 2010, plants have managed to scramble up another eight metres of mountain slope. To tackle inequality, the first priority is to fight climate change. When Bill de Blasio took the oath of office as mayor of New York City on 1 January, his inauguration address focused heavily on inequality.
In a speech four weeks earlier, President Obama made reducing economic inequality a core mission, saying: "For the rest of my presidency, that's where you should expect my administration to focus all our efforts. " Inequality is a critical issue globally. A society where the gains of economic growth go only to the already wealthy is not stable. That said, I believe that when we look back on the priorities set by presidents and mayors at this time in history, people will be astonished at what our leaders didn't prioritise. We should focus our energies on building general societal resilience (of which efforts to address inequality are a part), but more specifically, the first priority needs to be fighting and preparing for climate change. Imagine a probability curve of possible outcomes from our planet-baking experiment.
As Temperatures Climb, So Does Malaria. Warming temperatures expand the risk area for malaria, pushing the disease farther uphill in afflicted regions, according to a new study.
Infecting more than 300 million people each year, malaria emerges from a tapestry of temperature, rainfall, vectors, parasites, human movement, public health and economics. Fighting the disease involves pulling on all of these threads, but scientists have a hard time figuring out which ones are the most important to predicting where the disease will go. Temperature has been especially contentious. Stuck in the Antarctic ice we set out to study - Blogs. Going off the ship is an endeavour - the Antarctic equivalent of a spacewalk.
It's cold, windy and lonely. Everything about it is the exact opposite of my normal summer destination. But scientists value the continent like an uncut gem. Every bit of data retrieved from Antarctica pushes science forward. En Arctique, la glace la plus vieille fond et emporte le reste de la banquise avec elle. La NOAA vient de publier une vidéo très efficace montrant combien les choses sont en train de dégénérer au sommet de la planète.
Sur l'animation, on voit la fonte de la calotte glaciaire non seulement en termes de surface, mais aussi d'âge de la banquise – plus les zones sont blanches, plus les couches de glace sont anciennes (9 ans ou plus). On peut facilement constater que, ces dernières années, les couches de glace les plus anciennes ont fondu et que la glace arctique ne cesse de rajeunir. Ce qui n'augure rien de bon: plus la glace est vieille, plus elle est épaisse et plus elle reste en place; la glace plus jeune, elle, est plus fine et fond tous les étés. Ce qui signifie que, tous les ans, la quantité de glace présente au pôle nord diminue, et qu'elle diminue vite. L'activité solaire n'influence pas le changement climatique actuel.
Les éruptions volcaniques seraient le forçage externe dominant sur la variabilité de la température globale moyenne. © Janke, USGS L'activité solaire n'influence pas le changement climatique actuel - 2 Photos L’activité solaire n’est peut-être pas l’un des acteurs majeurs dans les changements climatiques survenus au cours du dernier millénaire.
Jusqu’à aujourd’hui, on attribuait communément le petit âge glaciaire (couvrant la période 1450-1850) à une faible activité de notre astre. De même, l’anomalie climatique médiévale, marquée par un réchauffement régional important durant la période 950-1250, est majoritairement associée à une intense activité solaire. Néanmoins, le lien entre l’intensité du soleil et l’amplitude du changement associé est méconnu.