Dix questions, dix réponses sur le changement climatique. Mais d’abord, qu’est-ce que le climat ? Celui-ci désigne l’ensemble des conditions atmosphériques sur Terre à un moment donné : ensoleillement, pluie, neige ou grêle, température, humidité, vent... Elles dépendent de trois facteurs qui s’équilibrent : le rayonnement solaire, l’effet de serre et les grandes circulations atmosphériques et océaniques. Cet équilibre est en passe d’être rompu. Le Groupe d’experts intergouvernemental sur l’évolution du climat (GIEC) constate que l’atmosphère et les océans se réchauffent. Dans son rapport, il observe que la température atmosphérique globale a augmenté de 0,85°C entre 1880 et 2012, et que la période 1983 – 2012 est la plus chaude qu’ait connu l’hémisphère nord depuis 1 400 ans. Pour aller à la source : le rapport du GIEC en anglais ; la synthèse en français. A cause de l’accroissement de l’effet de serre.
Le problème, c’est que les concentrations atmosphériques en GES ne sont plus stables comme pendant des milliers d’années. Non ! Photos : . Atacama Desert flooded after 7 years of rain fell in just 12 hours. At least 10 people have been killed by catastrophic floods in northern regions of Chile after thunderstorms brought the equivalent of 7 years of rain in just 12 hours on March 26.
Search and rescue operations are still in progress and authorities fear the number of casualties will rise. Flooding has affected the regions of Atacama, Antofagasta and Coquimbo, all located in the Atacama Desert, one of the driest regions of the world. Heavy rainfall and consequent river overflow, flash floods and landslides knocked out power and communication lines, destroyed infrastructure and made roadways impassable.
A state of emergency is in effect since March 26 for the Atacama Region and the Antofagasta municipality. The Health Ministry has declared a Sanitary Alert in Copiapó, Tierra Amarilla, Diego de Almagro and Alto del Carmen. Chile's Deputy Interior Minister Mahmud Aleuy called the flooding "the worst rain disaster to fall on the north in 80 years. " As of March 28, a total of 10 persons died. Arctic ice melt sets yet another record. This story was originally published by Slate and is reproduced here as part of the Climate Desk collaboration. Every year around the end of February, after a long winter, Arctic ice reaches its maximum extent.
This year that happened around Feb. 25, when it encompassed 14.54 million square kilometers (5.61 million square miles) of ice around the North Pole. Sound like a lot? It’s not. Really, really not. The plot above shows the situation. The dashed line was the extent in 2012, when unusual conditions created the lowest minimum extent in recorded history. We have to be careful here, because individual records can be misleading.
Here’s a NASA video describing this year’s low maximum: The implications of losing Arctic ice are profound. Melting ice does contribute to sea-level rise, though not as much as melting glaciers on land. At the other pole, Antarctic land ice is melting at a fantastic rate, and the slight increase in sea ice is not even coming close to making up for it. Turns out the world’s first “clean coal” plant is a backdoor subsidy to oil producers. The world’s first “clean coal” plant — that is, the first full-size coal-fired power plant ever to capture and store the majority of its CO2 emissions — is located in, of all places, Saskatchewan. (They should change the name to “Of All Places, Saskatchewan.”)
According to the first financial analysis done on the project, it appears to be functioning primarily as a public subsidy to the province’s aging oil industry. This takes a little explanation. First some quick background on the project. The Boundary Dam Power Station, located just north of the North Dakota border, is the province’s oldest and largest coal-fired power plant. In 2008, the provincial government announced the Boundary Dam CCS project, whereby one of the station’s boilers (No. 3) would be replaced with a modern 160-megawatt boiler and coupled with a facility that would capture and store up to 90 percent of the boiler’s CO2 emissions. Anyhow. Just to be up front: The report is written by a wind guy, James Glennie.
CLER - Base de données documentaires. CONCOURS DE POESIE : Un haiku pour le climat Mettez votre énergie créatrice et votre amour des mots au service de la sobriété énergétique et de l'environnement ! L'année 2015 sera marquée par la transition énergétique et la lutte contre les changements climatiques... Alors que se prépare en France l'organisation en décembre de la conférence Paris Climat 2015 et dans le cadre du Printemps des poètes, le CLER lance un grand concours de HAIKUS sur le thème de l'énergie et du climat.
Le 17ème Printemps des Poètes nous propose cette année le thème de l'insurrection poétique, occasion de nous révolter contre les bouleversements climatiques en cours, et de nous soulever contre le système énergétique actuel, avec pour arme la poésie. Vous trouverez le règlement ci-dessous ! Éducation à l'énergie - Outil pédagogique Effet de serre - Changement climatique Plan / Programme de développement - Campagne de communication - Concours / Trophée Candidat - Transition énergétique Candidat - Liste pédagogique. Le dieu pétrole dévore le Canada, par Nancy Huston. LE MONDE | • Mis à jour le | Par Nancy Huston Je suis chez moi, et hors de moi. En encourageant le développement à outrance des industries pétrolières de l'Alberta, Stephen Harper, le premier ministre canadien, met l'humanité en péril.
L'humanité de ma province natale, et l'humanité tout court. Pour l'instant, peu de Français le savent : l'extraction du bitume des sables dans l'ouest du Canada est l'entreprise humaine la plus importante de la Terre. Le potentiel pétrolier de ces sables est estimé à 2 500 milliards de barils, assez pour nous nourrir en or noir, au rythme insensé où nous le consommons, pendant encore deux siècles et demi. Lire la synthèse (en édition abonnés) : Au Canada, l'or noir des sables bitumineux mis en cause La façon de nommer ce site vous oblige déjà à vous en montrer solidaire : la majorité des Albertains a adopté le terme officiel de sables pétroliers ; seuls les écolos persistent à les appeler sables bitumineux. Le maître mot à Fort McMoney est big. Watch us explain ocean acidification with a soda maker. A second giant blob of Antarctic ice is getting ready to drown us. Remember when we found out last year that the West Antarctic ice sheet had started to collapse, that the collapse more or less can’t be stopped, and that it will eventually result in 10 to 15 feet of sea-level rise?
Now we have some more bad news of that caliber. An enormous glacier, one on the other side of the continent from the ailing ice sheet, is doing pretty much the same thing, researchers have discovered. Chris Mooney reports for The Washington Post: The findings about East Antarctica emerge from a new paper just out in Nature Geoscience by an international team of scientists representing the United States, Britain, France, and Australia.
They flew a number of research flights over the Totten Glacier of East Antarctica — the fastest-thinning sector of the world’s largest ice sheet — and took a variety of measurements to try to figure out the reasons behind its retreat. Researchers have made it pretty clear that the West Antarctic ice sheet’s collapse is unstoppable. Vanuatu’s president blames climate change for Cyclone Pam. This story was originally published by The Guardian and is reproduced here as part of the Climate Desk collaboration. The president of Vanuatu says climate change is contributing to more extreme weather conditions and cyclone seasons, after cyclone Pam ripped through the island nation. The damage from the Category 5 storm to the island nation has been extensive, and is still being assessed as aid workers scrambled to get to affected areas on Monday morning.
The official death toll remains at six, with many more injured, and is expected to rise as communication begins to be restored. Vanuatu’s president, Baldwin Lonsdale, spoke at a United Nations world conference in Sendai, Japan, on March 16, and said the storm was a major setback for the people, virtually wiping out Vanuatu’s development. “This is a very devastating cyclone … I term it a monster that has hit Vanuatu,” he said. He said the cyclone seasons that the nation had experienced were directly linked to climate change.
Vanuatu's president blames climate change for extreme weather. The president of Vanuatu says climate change is contributing to more extreme weather conditions and cyclone seasons, after cyclone Pam ripped through the island nation. The damage from the category five storm to the island nation has been extensive, and is still being assessed as aid workers scrambled to get to affected areas on Monday morning. The official death toll remains at six, with many more injured, and is expected to rise as communication begins to be restored. Vanuatu’s president, Baldwin Lonsdale, spoke at a United Nations world conference in Sendai, Japan, on Monday, and said the storm was a major setback for the people, virtually wiping out Vanuatu’s development. “This is a very devastating cyclone … I term it a monster that has hit Vanuatu,” he said.
“It is a setback for the government and for the people of Vanuatu … All the development that has taken place has been wiped out.” He said the cyclone seasons that the nation had experienced were directly linked to climate change. Climate change is baking Alaska. Something does seem to be going on in Alaska. Last fall, a skipjack tuna, which is more likely to be found in the Galápagos than near a glacier, was caught about 150 miles southeast of Anchorage, not far from the Kenai.
This past weekend, race organizers had to truck in snow to the ceremonial Iditarod start line in Anchorage. Sen. Lisa Murkowski (R-Ak.) tweeted a photo of one of the piles of snow with the hashtag #wemakeitwork. But it’s unclear how long that will be possible. Of course, it’s not just Alaska. Alaska is at the front lines of climate change. On March 9, Zappa and her dogs set out on the 1,000-mile race across Alaska as one of 78 mushers in this year’s Iditarod.
For Iditarod entrants, the warm weather can mean life or death. Of course, it wasn’t always this way. The Pacific Ocean near Alaska has been record-warm for months now. Climate scientists are starting to link the combination of melting sea ice and warm ocean temperatures to shifts in the jet stream. Italy sets new world one-day snowfall record. Capracotta and Pescocostanzo, between Abruzzo and Molise in central Italy are officially the snowiest places in the world, Meteoweb.eu writes. While Capracotta, in the province of Isernia, has set the new world one-day snowfall record with 256 cm (8.34 feet) of snow in about 18 hours on Thursday, March 5, 2015, Pescocostanzo measured almost equally impressive 240 cm (7.84 feet). The previous world one-day snowfall record was set in Silver Lake, Colorado, US when 193 cm (6.33 feet) of snow fell between April 20 to 21, 1921. Capracotta, Itally.
March 2015. Meteoweb.eu adds that areas between Abruzzo and Molise saw similar amounts of snow several times before. "Meteorologist Edmondo Bernacca wrote for the Italian Meteorological Magazine in December 1961 that in Roccacaramanico, just 878 meters above sea level in the province of Pescara, 365 cm (11.9 feet) of snow fell in just 24 hours. " Pescocostanzo, Italy. Source: Meteoweb.eu Featured image: Pescocostanzo, Italy. Telerama-FPLP.pdf. Climate change is messing with leaves, and leaves are messing back. Climate change is a lot like Mr. Miyagi from The Karate Kid. Or rather, it is like an evil, disembodied Mr. Miyagi looming over the globe, whispering “Leaf on. Leaf off. Leaf on. Basically, a new study published yesterday in the journal Nature Climate Change shows that vegetation patterns around the world are shifting thanks to climate change. The specific forces behind these shifts could be a variety of things — local precipitation changes, temperature changes, shifts in atmospheric CO2, etc. — but one thing’s for sure: As much as climate change can mess with vegetation, vegetation can mess right back.
Higgins and his colleagues point out that previous studies analyzing the effects of climate change on global vegetation have focused on net plant productivity, rather than life-cycle changes. That’s why, using satellite images, the researchers decided to take a look at those more subtle changes. So damn you, evil Mr. Even Europe isn’t doing enough to meet its climate goals. Europe isn’t doing enough to fight climate change, according to a report out today from the European Environment Agency — and that’s bad news for all of the less ambitious nations out there. While the European Union is on track to meet its 2020 climate goals, it’s not in a good position to continue on after that to meet its 2050 goals, the report found.
The E.U. is also falling short on many other sustainability goals. From Reuters: The Copenhagen-based EEA said Europe — backed by some of the toughest environmental legislation in the world — had improved air and water quality, cut greenhouse gas emissions and raised waste recycling in recent years. The E.U. aims to reduce greenhouse gas emissions by 80 to 95 percent by 2050. The report concludes that “although full implementation of existing policies will be essential, neither the environmental policies currently in place, nor economic and technology-driven efficiency gains, will be sufficient to achieve Europe’s 2050 vision.” Chai Jing's review: Under the Dome – Investigating China’s Haze 柴静雾霾调查：穹顶之下. «Sous le dôme», le film sur la pollution qui secoue la Chine. C’est un événement sans précédent qui s’est produit ce week-end en Chine. Un documentaire sur la pollution atmosphérique, présenté par la célèbre journaliste Chai Jing, s’est propagé sur les réseaux sociaux chinois, et tout le monde en parle depuis, de l’infirmière au chauffeur de taxi en passant par les voisins dans l’ascenseur.
Un film qui s’intéresse aux effets du smog sur la santé et dénonce l’impuissance du ministère de l’Environnement, mais incite également le spectateur-citoyen à agir. Le premier jour, le film a été visionné 155 millions de fois, selon le South China Morning Post. Humour et tact Chai Jing, 39 ans, a longtemps travaillé pour CCTV, la télévision nationale.
En 2013, elle a donné le jour aux Etats-Unis à une petite fille atteinte d’une tumeur qu’il a fallu opérer dès la naissance. Le film de plus de deux heures s’appelle Sous le dôme. «Je n’ose pas ouvrir la bouche» Réveil civique Le film suscite bien entendu des questions.