Manmade Climate Change Discussion

[knocker]

What Does 400 ppm Look Like?

“Our grandchildren will inhabit a radically altered planet, as the ocean gradually warms up in response to the buildup of heat-trapping gases,†said Scripps Institution of Oceanography, UC San Diego geoscientist Jeff Severinghaus.

 

 

http://keelingcurve.ucsd.edu/what-does-400-ppm-look-like/

Edited April 29, 2013 by knocker

[Methuselah]

http://www.skepticalscience.com/contradictions.php

[Gray-Wolf]

[Gray-Wolf]

And when do we believe our impacts were enough to be measured, and place us in the  Anthropocene  , 5,000yrs ago

 

http://www.newscientist.com/article/dn23460-humans-indelible-stamp-on-earth-clear-5000-years-ago.html?full=true

 

 

"And as for the onset of the Anthropocene? Ellis is reluctant to put a definite date on it but Fuller is happy to pinpoint it to around 3000 BC. "This is the point at which we are beginning to see rises in both carbon dioxide and methane; domesticated fauna start to become widespread on all the Old World continents, and we have the emergence of urbanism and larger scale metallurgy around this time or soon after," he says."

[knocker]

Published on May 1, 2013

World Economic Forum - Latin America 2013 - Is the Amazon Becoming a Savannah?With discussion around the World Economic Forum on Latin America focussing around the future of the Amazon on our social channel's, Juan Carlos Castilla-Rubio's suggestion that the Amazon could be turning into a savannah provoked a spirited reaction.

 

[knocker]

Roy Spencer was recently interviewed by the website Catholic Online, and unfortunately spent most of the interview repeating long-debunked climate myths.  He could have simply answered the questions with factually correct information, and expressed his climate 'skepticism' where appropriate.  Had he taken this approach, the Catholic Online readers could have become better informed on the subject of climate change, as well as potentially seeing where Roy Spencer's 'skepticism' comes from.

 

Instead, Roy Spencer responded to most of the questions with factually wrong answers.  It was the sort of interview you might expect from a climate contrarian blogger like Anthony Watts, but you would hope that a climate scientist could do much, much better.  Unfortunately, Spencer disappointed.  Here we will compare Spencer's assertions to the body of scientific evidence and see where he went wrong.

 

 

http://www.skepticalscience.com/news.php?n=1987&utm_source=dlvr.it&utm_medium=twitter

[Polar Maritime]

Didn't know where to post this really.. But it certainly looks a good viewing.

 

"Trashed," a multi-award winning documentary, investigates the air, land and sea pollution that threatens not only our food chain, but our very existence. The film is both horrific and beautiful: an interplay of human interest and a political wake-up call.

 

 http://www.trashedfilm.com/

Edited May 2, 2013 by Polar Maritime

[knocker]

Time history of atmospheric carbon dioxide from 800,000 years before present until January, 2011. Credit: Andy Jacobson, CIRES/NOAA. FULL video at: http://www.youtube.com/watch?v=H2mZyC.... NOAA: http://www.noaanews.noaa.gov/stories2...

 

[knocker]

NASA Study Projects Warming-Driven Changes in Global Rainfall

05.03.13

 

A NASA-led modeling study provides new evidence that global warming may increase the risk for extreme rainfall and drought.

 

The study shows for the first time how rising carbon dioxide concentrations could affect the entire range of rainfall types on Earth.

Analysis of computer simulations from 14 climate models indicates wet regions of the world, such as the equatorial Pacific Ocean and Asian monsoon regions, will see increases in heavy precipitation because of warming resulting from projected increases in carbon dioxide levels. Arid land areas outside the tropics and many regions with moderate rainfall could become drier.

The analysis provides a new assessment of global warming's impacts on precipitation patterns around the world. The study was accepted for publication in the American Geophysical Union journal Geophysical Research Letters.

 

 

http://www.nasa.gov/topics/earth/features/wetter-wet.html

[knocker]

Andrey Ganopolski of the Potsdam Institute for Climate Impact Research (PIK) is one of the pioneers of constraining climate sensitivity from paleoclimatic data, as author of one of the first papers on this topic published in 2006: http://www.pik-potsdam.de/~stefan/Pub.... He coauthored the recent Nature paper "Making sense of paleoclimate sensitivity", which concludes on the basis of many studies that the experience of past climate changes in Earth's history implies a warming of 2.2--4.8K per doubling of atmospheric CO2, which agrees with IPCC estimates.

 

[Methuselah]

Thanks for that, knocker...It does show, quite clearly IMO, that uncertainty is a necessary part of climate science; but that it doesn't negate that science...

[knocker]

Thanks for that, knocker...It does show, quite clearly IMO, that uncertainty is a necessary part of climate science; but that it doesn't negate that science...

 

I couldn't agree more ABNS. I wish you'd stick to Johnny Cash.

[knocker]

The Finnish Meteorological Institute has updated its estimates concerning the impact of rising sea levels on the Finnish coast.

 

http://www.skepticalscience.com/news.php?n=1997&utm_source=dlvr.it&utm_medium=twitter

[Methuselah]

The radiation-absorbing characteristics of CO₂ combined with the fact that (as sceptics are wont to point-out) its absorption curve is logarithmic, is what makes it (as a trace gas) such a vital part of Earth's natural thermal regulation system...If it did make up say 1% of the atmosphere its effects would indeed by minimal...

[Methuselah]

Without going into the differences between weather and climate, this link might be helpful... http://www.mathsisfun.com/algebra/logarithms.html

 

There is truth in the old adage: a picture says more than a thousand words...

Edited May 22, 2013 by pottyprof

[knocker]

[knocker]

This isn't the weather we grew up with

Climate change means we are experiencing extreme weather with increasing frequency – and increasing economic cost

 

It doesn't take a rocket scientist (or an earth scientist for that matter) to know that today's weather isn't the weather we grew up with – and today's climate isn't the climate of yesterday. As a scientist who studies this topic daily, I and my colleagues know why. Human greenhouse gas emissions have led to a 40% increase in the amount of carbon dioxide in the atmosphere. As a result, the Earth is gaining energy at an alarming rate.

 

 

http://www.guardian.co.uk/environment/climate-consensus-97-per-cent/2013/may/07/isnt-weather-we-grew-up-with?CMP=twt_gu

[knocker]

Tornado doom then tornado drought: Both linked to climate change?

We are living through the most anemic one-year period for tornadoes in the modern record – a cause for celebration if you dislike human suffering and destruction. The present lull in these violent storms stands in sharp contrast to 2011, one of the most active years for twisters, with devastating consequences for life and property.

 

What does this tornado pendulum signify about the effect of climate change on twisters? Probably very little – as far as scientists can tell. As we’ve discussed, the latest research shows connections between climate change and tornadoes are neither well-established nor well well-understood – though more is being learned.

 

Yet it’s exactly this uncertain state of knowledge about tornadoes and climate that has proven fertile ground for debate about how any connections should be conveyed.

 

 

http://www.washingtonpost.com/blogs/capital-weather-gang/wp/2013/05/06/tornado-doom-then-tornado-drought-both-linked-to-climate-change/

[knocker]

It's only the global mean that matters...

 

Quite true ABNS.

[Methuselah]

Cheers knocker!

[Guest]

Quite true ABNS.

 

I refer to the comments on the thumb nail graph and note that their comments only refer to the last 7000 years, however if the sea levels were some 300 metres lower than the present day at the end of the last ice age, the initial increase in sea levels must have been a lot more significant at the beginning than what they are now. 

[Polar Maritime]

[Gray-Wolf]

http://www.wmo.int/pages/mediacentre/press_releases/documents/WMO_1108_EN_web.pdf

 

A snapshot of our cooling planet......

[knocker]

It’s Existential

Edited May 9, 2013 by knocker

[Polar Maritime]

More lies, conspiracies, and miss information..... knocker 

Edited May 9, 2013 by Polar Maritime