Midilibre.fr
Tous les blogs | Alerter le modérateur| Envoyer à un ami | Créer un Blog

09/03/2015

Parler de "changement climatique" n'est pas politiquement correct

à lire sur le site du Guardian :
 

Florida banned state workers from using term 'climate change' – report

www.theguardian.com/.../florida-banned-terms-climate-change-global- warming
 

Officials with the Florida Department of Environmental Protection (DEP), the agency in charge of setting conservation policy and enforcing environmental laws in the state, issued directives in 2011 barring thousands of employees from using the phrases “climate change” and “global warming”, according to a bombshell report by the Florida Center for Investigative Reporting (FCIR).

The report ties the alleged policy, which is described as “unwritten”, to the election of Republican governor Rick Scott and his appointment of a new department director that year. Scott, who was re-elected last November, has declined to say whether he believes in climate change caused by human activity.

01/02/2015

Réchauffement climatique et activité volcanique

 

 Nota Bene :

 

les personnes qui lisent les notes mises sur ce blog ont sans doute remarqué la présence d'un bandeau publicitaire dans le haut de l'écran. Cette publicité, mise par le MIDI LIBRE, n'existait pas auparavant ; elle est apparue il y a quelques jours. 

 

Il faut savoir que cette publicité est extrêmement gênante pour l'enregistrement des notes et ralentit considérablement leur mise en page. 

 

De plus, je suis par principe opposé à toute publicité.

 

J'envisage donc de trouver un autre hébergeur pour ce blog.

 

L'adresse vous en sera donnée en temps voulu.

 

---------------------------------------------------------------------

 

lu sur :

Climate change is lifting Iceland – and it could mean more volcanic ...

www.theguardian.com/.../climate-change-lifting-iceland-volcanic-eruptions

 

Climate change is lifting Iceland – and it could mean more volcanic eruptions

Land moving upward faster than researchers expected at 1.4in every year, allowing ‘hot potato’ rocks to rise

Iceland is rising because of climate change, with land freed by the melting of the ice caps rebounding from the Earth at a rate of up to 1.4in per year.

The downside? Researchers believe the extra uplift could be behind an increase in volcanic activity, with three Icelandic eruptions in the last five years shutting down flights and spewing ash in the air.

In new research published in Geophysical Research Letters, scientists from the University of Arizona and the University of Iceland found the earth’s crust rising at a much faster rate amid the greater warming of the last 30 years.

At some sites in south and south-central Iceland, where five of the largest ice caps are located, ice loss resulting from that warming produced an uplift of 1.4in per year, the researchers said.

Researchers have known for some time that land freed from the weight of ice sheets tends to rise. But they did not anticipate just how swiftly the bounce in Iceland was occurring.

“It’s similar to putting weights on a trampoline. If you take the weights off, the trampoline will bounce right back up to its original flat shape,” said Richard Bennett, a geologist at the University of Arizona and one of the authors of the new research.

The bigger bounce was due to increased warming over the last 30 years, mathematical models showed.

“What we found is that the uplift is increasing. It’s faster and faster everywhere because of the accelerated loss of ice mass,” said Bennett.

The researchers relied on 62 GPS devices, deployed on rocks throughout Iceland, to track the changes in position. Some of the GPS receivers had been in position since 1995.

The danger is that increased melting and uplift could lead to a further uptick in volcanic activity. Iceland has experienced three eruptions in the last five years. When Eyjafjallajökull blew in 2010, flights across Europe were disrupted for a week.

The entire chain reaction of melting ice caps, rising earth surface and volcanic activity is still not entirely understood, Bennett said. But as the surface of the earth rises, so do rocks at depth, released from the pressure of the ice.

“They transport the heat like a hot potato as they move from high pressure to lower pressure and enter into conditions that promote melting,” Bennett said. And that creates conditions that are ripe for eruptions.

-------------------

quelques explications :

Le diamètre moyen de la Terre est de 12742 km et l'épaisseur moyenne de la croûte terrestre continentale est de 35 km. ( l'épaisseur du fond des océans est beaucoup plus fine : 7km environ )

Pour donner une idée , si la terre était représentée par une sphère d'environ 12cm de diamètre (une grosse orange), l'épaisseur de la croûte terrestre sur laquelle nous vivons ne serait que de 1/3 de mm (même pas l'épaisseur d'un ongle, pour fixer les idées).

Si les calottes glaciaires fondent, les plaques tectoniques sur lesquelles elle reposent sont allégées du poids de la couche de glace qui disparaît et elles se soulèvent (plus exactement : elles basculent), et le magma en fusion passe entre les fentes, et ... il y a des éruptions volcanique. C'est ce qui se passe en Islande.

Qui dit éruption volcanique dit cendres dans l'atmosphère, d'où possibilité d'un refroidissement climatique par occultation du rayonnement solaire. 

Avec des conséquences qui peuvent être importantes. Voir à ce sujet :

Lakagígar — Wikipédia

fr.wikipedia.org/wiki/Lakagígar
Les Lakagígar, toponyme islandais signifiant littéralement en français « les ... Les aérosols créés provoquèrent alors un refroidissement dans tout .... et à la famine, un des facteurs importants qui provoquèrent la Révolution française en 1789. 

 

22/01/2015

Réchauffement climatique : il est réel mais seul Dieu est responsable ! (pas l'Homme)

Nota Bene :

les personnes qui lisent les notes mises sur ce blog ont sans doute remarqué la présence d'un bandeau publicitaire dans le haut de l'écran. Cette publicité, mise par le MIDI LIBRE, n'existait pas auparavant ; elle est apparue il y a quelques jours. 

Il faut savoir que cette publicité est extrêmement gênante pour l'enregistrement des notes et ralentit considérablement leur mise en page. 

De plus, je suis par principe opposé à toute publicité.

J'envisage donc de trouver un autre hébergeur pour ce blog.

L'adresse vous en sera donnée en temps voulu.

lu sur : (les surlignages sont de moi)

Magazine GoodPlanet 

Publié le : 22/01/2015     Last updated: 22/01/2015 15h26

- See more at: http://www.goodplanet.info/actualite/2015/01/22/le-senat-americain-reconnait-le-changement-climatique-mais-pas-la-responsabilite-de-lhomme/#sthash.dS8f5RMf.dpuf

Washington (AFP) – Le changement climatique est réel, ont proclamé les sénateurs américains mercredi lors d’un vote hautement symbolique. Mais dans un second vote illustrant la controverse partisane sur le sujet, les sénateurs républicains ont disculpé l’homme.

Les démocrates ont profité d’un débat sur le projet controversé d’oléoduc Keystone XL pour tenter de trancher, une bonne fois pour toutes, la question du réchauffement climatique au sein de ce que les parlementaires américains appellent « la plus grande assemblée délibérante du monde ».

Ils ont déposé deux résolutions non contraignantes, soumises au vote des 100 sénateurs américains, en majorité républicains.

La première résolution affirme en une phrase que « le changement climatique est réel et n’est pas un canular »: elle a été approuvée par 98 voix contre 1 (le sénateur républicain du Mississippi Roger Wicker).

Les républicains ont désormais consigné pour l’histoire qu’ils ne contestaient pas la réalité du réchauffement de la planète.

La seconde motion démocrate, déposée par le sénateur d’Hawaï Brian Schatz, allait plus loin qu’un simple constat pour déclarer que le réchauffement était du fait de l’activité humaine, touchant au coeur de la controverse politique américaine.

Mais cette fois, 49 des 54 républicains ont voté contre, suffisamment pour couler la résolution.

L’origine de leur opposition date des premiers projets de taxation du carbone dans les années 2000, et depuis les républicains restent opposés aux propositions de Barack Obama pour réduire les émissions de gaz à effet de serre, afin de ne pas nuire à la compétitivité des entreprises américaines.

Cependant, ils restent nombreux à contester les conclusions de scientifiques qui lient le réchauffement à l’activité humaine.

« Quelle arrogance de dire que l’homme est capable de changer le climat », a redit celui qui a pris la tête du combat au Sénat, Jim Inhofe, président de la commission de l’Environnement.

« Le climat a toujours changé », a-t-il dit. « Relisez les conclusions archéologiques (…) La Bible en parle ».

Malgré la défaite, c’est dopé d’optimisme que le démocrate Brian Schatz est sorti de l’hémicycle.

« On voit émerger un groupe d’élus des deux partis qui pensent que le changement climatique est réel, causé par les humains et qu’il existe des solutions », a-t-il dit aux journalistes rassemblés pour l’événement.

« C’est un début », a dit sa collègue Barbara Boxer.

© AFP

- See more at: http://www.goodplanet.info/actualite/2015/01/22/le-senat-americain-reconnait-le-changement-climatique-mais-pas-la-responsabilite-de-lhomme/#sthash.dS8f5RMf.dpuf
 

 

US Senate refuses to accept humanity's role in global climate ...

www.theguardian.com/.../us-senate-man-climate-change-global-warming- hoax

41 minutes ago ... US Senate refuses to accept humanity's role in global climate changeagain. Senators accept global warming is not a hoax but fail to recognise ...
US Senate refuses to accept humanity's role in global climate change, again

Senators accept global warming is not a hoax but fail to recognise human activity is to blame, nearly 27 years after scientists laid out man’s role

Image 1.png

 



 

 

 

Republican and US senator James Inhofe: ‘Man can’t change climate’. Photograph: Susan Walsh/AP

 

 

 

 

It is nearly 27 years now since a Nasa scientist testified before the US Senate that the agency was 99% certain that rising global temperatures were caused by the burning of fossil fuels.

And the Senate still has not got it – based on the results of three symbolic climate change votes on Wednesday night.

The Senate voted virtually unanimously that climate change is occurring and not, as some Republicans have said, a hoax – but it defeated two measures attributing its causes to human activity.

Only one Senator, Roger Wicker, a Republican from Mississippi, voted against a resolution declaring climate change was real and not – as his fellow Republican, Jim Inhofe of Oklahoma once famous declared – a hoax. That measure passed 98 to one.

But the Senate voted down two measures that attributed climate change to human activity – and that is far more important.

Unless Senators are prepared to acknowledge the causes of climate change, it is likely they will remain unable and unwilling to do anything about it.

Democrats had planned the symbolic, “sense of the Senate” votes as a way of exposing the Republicans’ increasingly embarrassing climate change denial. Further climate votes will come up on Thursday.

Two were tacked on as Democratic amendments to a bill seeking to force approval of the contentious Keystone XL pipeline – despite a veto threat from Barack Obama.

The third, introduced by a Republican, affirmed climate change was real but expressed support for the Keystone XL pipeline.

The first vote, introduced by the Rhode Island Democrat, Senator Sheldon Whitehouse, said only: “To express the sense of the Senate that climate change is real and not a hoax.”

But Republicans have grown canny about being called out as climate deniers. For the Republican party leadership the current preferred phrase now is: “I am not a scientist” – which casts doubt but avoids outright denial. However, Obama made that line a butt of his jokes in the State of the Union address

Inhofe, the veteran climate denier in the Senate and incoming chair of the Senate Environment and Public Works Committee, stunned a number of Democrats when he asked to co-sponsor the amendment. 

For a moment it looked like the ultimate climate denier had had a change of heart – but no. Inhofe was ready to acknowledge climate change was occurring but he was adamant it had nothing to do with human activity such as the burning of fossil fuels.

“Climate is changing and climate has always changed and always will,” Inhofe told the Senate. “The hoax is that there are some people who are so arrogant to think they are so powerful they can change climate. Man can’t change climate.”

The quick thinking from Inhofe now leaves Wicker, the new chair of the National Republican Senatorial Committee, as the only Republican to still embrace the entire idea of climate change as a hoax.

Wicker did not immediately comment on his vote. But he has regularly said that there is no firm evidence of global temperature rise.

An amendment introduced by the North Dakota Republican and Keystone bill sponsor, John Hoeven, attributed climate change to human activity, but said the pipeline would have no significant impacts. Fifteen Republicans voted in favour, but the measure still failed by one vote, 59-40.

The final climate amendment, introduced by the Hawaii Democrat Brian Schatz, went further, stating: “human activity significantly contributes to climate change.”

Only five Republicans supported it – Lindsey Graham of South Carolina, Lamar Alexander of Tennessee, Kelly Ayotte of New Hampshire, Susan Collins of Maine and Mark Kirk of Illinois.

Rand Paul of Kentucky, Marco Rubio of Florida, and Ted Cruz of Texas – all thought of as leading Republican contenders for the 2016 presidential race – voted against. The bill was defeated 50-49.

Environmental groups claimed a partial victory – at least Republicans were admitting climate change was indeed occurring.

“I’m hoping that after many years of darkness and blockade that this can be a first little vote beam of light through the wall that will allow us to at least start having an honest conversation about what carbon pollution is doing to our climate and to our oceans,” Whitehouse told the Senate.

But the Senate has acknowledged the existence of climate change before and, as long ago as 2005, voted to affirm that human activity was its driver.

Since 2005, there has been an entire decade of accumulating evidence in real-time of the effects of climate change – and its threat in the future.

“We are worse off than 2005,” said Robert Brulle, a sociologist at Drexel University who writes about the climate denial movement. “The resolution saying that anthropogenic climate change is real and we need to act passed in 2005, and failed in 2015,” he said in an email. “A similar resolution failed today. 10 years, more certain science, less political will.” 

--------------

Dans le même domaine, voir :

In God We Trust — Wikipédia

fr.wikipedia.org/wiki/In_God_We_Trust