Comments on: Another “Must Read” from Hansen: ‘Long-term’ climate sensitivity of 6°C for doubled CO2 http://climateprogress.org/2007/10/01/another-must-read-from-hansen-%e2%80%98long-term%e2%80%99-climate-sensitivity-of-6%c2%b0c-for-doubled-co2/ The Latest on Climate Science, Solutions, and Politics Thu, 04 Dec 2008 05:34:01 +0000 http://wordpress.org/?v=2.1 By: Paul K http://climateprogress.org/2007/10/01/another-must-read-from-hansen-%e2%80%98long-term%e2%80%99-climate-sensitivity-of-6%c2%b0c-for-doubled-co2/#comment-5933 Paul K Mon, 01 Oct 2007 18:10:01 +0000 http://climateprogress.org/2007/10/01/another-must-read-from-hansen-%e2%80%98long-term%e2%80%99-climate-sensitivity-of-6%c2%b0c-for-doubled-co2/#comment-5933 Joe, The focus now is on solutions. From a policy point of view, the science is "settled" and it is not necessary to convince the unconvinced to go forward. Heck, I'm not convinced even though I support your efforts and your goals. What would be your target for CO2 in 2050? I imagine it would be even lower than the new British standard. Where are we now nationally and world wide? Is there information available about each country's CO2 emissions over the years? Are ours going up, down or holding steady? Joe,
The focus now is on solutions. From a policy point of view, the science is “settled” and it is not necessary to convince the unconvinced to go forward. Heck, I’m not convinced even though I support your efforts and your goals. What would be your target for CO2 in 2050? I imagine it would be even lower than the new British standard.
Where are we now nationally and world wide? Is there information available about each country’s CO2 emissions over the years? Are ours going up, down or holding steady?

]]> By: David B. Benson http://climateprogress.org/2007/10/01/another-must-read-from-hansen-%e2%80%98long-term%e2%80%99-climate-sensitivity-of-6%c2%b0c-for-doubled-co2/#comment-5934 David B. Benson Mon, 01 Oct 2007 18:29:15 +0000 http://climateprogress.org/2007/10/01/another-must-read-from-hansen-%e2%80%98long-term%e2%80%99-climate-sensitivity-of-6%c2%b0c-for-doubled-co2/#comment-5934 Paul K --- The U.S. contribution of carbon to theactive carbon cycle continues to grow with the economy and population, despite a somewhat greater energy efficiency. The world as a whole adds about 8 billion tonnes (Gt) of carbon to the active carbon cycle each year currently, up from about 7 Gt a few year ago. There is a total excess of about 500 Gt of carbon in the active carbon cycle. This is approximately half caused by the U.S. economy and half by Europe's. Try the Carbon Dioxide Information Analysis Center's excellent web site for greater detail. Paul K — The U.S. contribution of carbon to theactive carbon cycle continues to grow with the economy and population, despite a somewhat greater energy efficiency.

The world as a whole adds about 8 billion tonnes (Gt) of carbon to the active carbon cycle each year currently, up from about 7 Gt a few year ago.

There is a total excess of about 500 Gt of carbon in the active carbon cycle. This is approximately half caused by the U.S. economy and half by Europe’s.

Try the Carbon Dioxide Information Analysis Center’s excellent web site for greater detail.

]]> By: Joe http://climateprogress.org/2007/10/01/another-must-read-from-hansen-%e2%80%98long-term%e2%80%99-climate-sensitivity-of-6%c2%b0c-for-doubled-co2/#comment-5946 Joe Tue, 02 Oct 2007 20:39:19 +0000 http://climateprogress.org/2007/10/01/another-must-read-from-hansen-%e2%80%98long-term%e2%80%99-climate-sensitivity-of-6%c2%b0c-for-doubled-co2/#comment-5946 Paul: I agree that the science is settled -- but I still think it is important to stay up to date on the best writing and research. I hope to do a multi-part series on the solution soon -- after the website gets redesigned. Global emissions have been soaring. China and the U.S. account for most of the projected growth in the near future -- we hold the future in our hands. I'd like to see a 60% to 80% reduction by midcentury, but the key is to get started as quickly as possible off of business-as-usual. Paul: I agree that the science is settled — but I still think it is important to stay up to date on the best writing and research.

I hope to do a multi-part series on the solution soon — after the website gets redesigned.

Global emissions have been soaring. China and the U.S. account for most of the projected growth in the near future — we hold the future in our hands. I’d like to see a 60% to 80% reduction by midcentury, but the key is to get started as quickly as possible off of business-as-usual.

]]> By: Mark Hadfield http://climateprogress.org/2007/10/01/another-must-read-from-hansen-%e2%80%98long-term%e2%80%99-climate-sensitivity-of-6%c2%b0c-for-doubled-co2/#comment-5951 Mark Hadfield Wed, 03 Oct 2007 01:34:49 +0000 http://climateprogress.org/2007/10/01/another-must-read-from-hansen-%e2%80%98long-term%e2%80%99-climate-sensitivity-of-6%c2%b0c-for-doubled-co2/#comment-5951 Thanks for the quotations, but do you have a link for the article? Thanks for the quotations, but do you have a link for the article?

]]> By: Mark Hadfield http://climateprogress.org/2007/10/01/another-must-read-from-hansen-%e2%80%98long-term%e2%80%99-climate-sensitivity-of-6%c2%b0c-for-doubled-co2/#comment-5952 Mark Hadfield Wed, 03 Oct 2007 01:44:08 +0000 http://climateprogress.org/2007/10/01/another-must-read-from-hansen-%e2%80%98long-term%e2%80%99-climate-sensitivity-of-6%c2%b0c-for-doubled-co2/#comment-5952 Oh I see: you mean the article you referred to in the previous paragraph: Global Warming: East-West Connections. This wasn't clear to me. Oh I see: you mean the article you referred to in the previous paragraph: Global Warming: East-West Connections. This wasn’t clear to me.

]]> By: Ron http://climateprogress.org/2007/10/01/another-must-read-from-hansen-%e2%80%98long-term%e2%80%99-climate-sensitivity-of-6%c2%b0c-for-doubled-co2/#comment-5961 Ron Wed, 03 Oct 2007 16:51:08 +0000 http://climateprogress.org/2007/10/01/another-must-read-from-hansen-%e2%80%98long-term%e2%80%99-climate-sensitivity-of-6%c2%b0c-for-doubled-co2/#comment-5961 It's nice to see that Hansen is aknowledging the Sun's role in all of this, even if many pundits and bloggers still insist it's a myth. And here's a new article about it - http://www.environmentnc.com/?p=272 It’s nice to see that Hansen is aknowledging the Sun’s role in all of this, even if many pundits and bloggers still insist it’s a myth.

And here’s a new article about it -

http://www.environmentnc.com/?p=272

]]> By: michael http://climateprogress.org/2007/10/01/another-must-read-from-hansen-%e2%80%98long-term%e2%80%99-climate-sensitivity-of-6%c2%b0c-for-doubled-co2/#comment-5969 michael Wed, 03 Oct 2007 19:54:34 +0000 http://climateprogress.org/2007/10/01/another-must-read-from-hansen-%e2%80%98long-term%e2%80%99-climate-sensitivity-of-6%c2%b0c-for-doubled-co2/#comment-5969 there is not and will not be a serious effort to control or reduce carbon emissions: the world is headed for a cataclysm and nothing will stop it. we will continue to dump carbon into the atmosphere until the ecosystem collapses and finally we as a species are severely reduced if not eliminated. there is not and will not be a serious effort to control or reduce carbon emissions: the world is headed for a cataclysm and nothing will stop it. we will continue to dump carbon into the atmosphere until the ecosystem collapses and finally we as a species are severely reduced if not eliminated.

]]> By: Dorothy Cutting http://climateprogress.org/2007/10/01/another-must-read-from-hansen-%e2%80%98long-term%e2%80%99-climate-sensitivity-of-6%c2%b0c-for-doubled-co2/#comment-6201 Dorothy Cutting Tue, 16 Oct 2007 21:00:30 +0000 http://climateprogress.org/2007/10/01/another-must-read-from-hansen-%e2%80%98long-term%e2%80%99-climate-sensitivity-of-6%c2%b0c-for-doubled-co2/#comment-6201 Before people write much more about this subject, they should go to the CarbonEquity.info website and download 'The Big Melt - Lessons from the Arctic summer of 2007.' The graph on page five is a real shocker. When I show it to others, they turn pale. Before people write much more about this subject, they should go to the CarbonEquity.info website and download ‘The Big Melt - Lessons from the Arctic summer of 2007.’ The graph on page five is a real shocker. When I show it to others, they turn pale.

]]> By: michael http://climateprogress.org/2007/10/01/another-must-read-from-hansen-%e2%80%98long-term%e2%80%99-climate-sensitivity-of-6%c2%b0c-for-doubled-co2/#comment-6364 michael Thu, 25 Oct 2007 21:06:15 +0000 http://climateprogress.org/2007/10/01/another-must-read-from-hansen-%e2%80%98long-term%e2%80%99-climate-sensitivity-of-6%c2%b0c-for-doubled-co2/#comment-6364 would you be kind enough to check on the address for carbon.equity.info..i tried looking for it on yahoo and nothing... would you be kind enough to check on the address for carbon.equity.info..i tried looking for it on yahoo and nothing…

]]> By: fiona fulton http://climateprogress.org/2007/10/01/another-must-read-from-hansen-%e2%80%98long-term%e2%80%99-climate-sensitivity-of-6%c2%b0c-for-doubled-co2/#comment-7788 fiona fulton Wed, 02 Jan 2008 12:49:47 +0000 http://climateprogress.org/2007/10/01/another-must-read-from-hansen-%e2%80%98long-term%e2%80%99-climate-sensitivity-of-6%c2%b0c-for-doubled-co2/#comment-7788 It can be found at : http://www.carbonequity.info/ It can be found at :
http://www.carbonequity.info/

]]> By: LornaSalzman http://climateprogress.org/2007/10/01/another-must-read-from-hansen-%e2%80%98long-term%e2%80%99-climate-sensitivity-of-6%c2%b0c-for-doubled-co2/#comment-9899 LornaSalzman Sun, 23 Mar 2008 16:39:24 +0000 http://climateprogress.org/2007/10/01/another-must-read-from-hansen-%e2%80%98long-term%e2%80%99-climate-sensitivity-of-6%c2%b0c-for-doubled-co2/#comment-9899 The unanswered question is: what should we do and when do we start? We know what needs to be done but we know it hasn't started, notwithstanding the scam called carbon trading or the feeble legislation that recently passed congress. Why is Jim Hansen the only scientist making his voice heard in the public and political process? Why isn't the scientific community backing him up with petitions, advertisements in publications, public lectures, radio and TV interviews, direct mailings, and, above all,a strong uncompromising lobbying presence in the halls of congress demanding tough reductions in energy use in the next ten years? Why are they not coming out in opposition to coal burning power plants, both operating and planned? Why are they not opposing fossil fuel subsidies? Why are they not publicizing the false hopes of carbon sequestration? They should be among the strongest environmental advocates. Jim Hansen deserves huge credit for what he is doing but this doesn't get the other scientists off the hook. They can't use their professional expertise to hide from their civic responsibility as CITIZENS to speak out and act. You don't give up your political rights when get a science degree or job at a university or research lab. They should be organizing a Million Scientist March on Washington to demand energy policies commensurate with the dangers and imminence of climate change. The unanswered question is: what should we do and when do we start? We know what needs to be done but we know it hasn’t started, notwithstanding the scam called carbon trading or the feeble legislation that recently passed congress. Why is Jim Hansen the only scientist making his voice heard in the public and political process? Why isn’t the scientific community backing him up with petitions, advertisements in publications, public lectures, radio and TV interviews, direct mailings, and, above all,a strong uncompromising lobbying presence in the halls of congress demanding tough reductions in energy use in the next ten years? Why are they not coming out in opposition to coal burning power plants, both operating and planned? Why are they not opposing fossil fuel subsidies? Why are they not publicizing the false hopes of carbon sequestration? They should be among the strongest environmental advocates. Jim Hansen deserves huge credit for what he is doing but this doesn’t get the other scientists off the hook. They can’t use their professional expertise to hide from their civic responsibility as CITIZENS to speak out and act. You don’t give up your political rights when get a science degree or job at a university or research lab. They should be organizing a Million Scientist March on Washington to demand energy policies commensurate with the dangers and imminence of climate change.

]]> By: steve http://climateprogress.org/2007/10/01/another-must-read-from-hansen-%e2%80%98long-term%e2%80%99-climate-sensitivity-of-6%c2%b0c-for-doubled-co2/#comment-11322 steve Tue, 22 Apr 2008 15:39:31 +0000 http://climateprogress.org/2007/10/01/another-must-read-from-hansen-%e2%80%98long-term%e2%80%99-climate-sensitivity-of-6%c2%b0c-for-doubled-co2/#comment-11322 if you apply the same long term effects to solar output that we know happened is there any temperature change left to have to explain? if you apply the same long term effects to solar output that we know happened is there any temperature change left to have to explain?

]]> By: Earl Killian http://climateprogress.org/2007/10/01/another-must-read-from-hansen-%e2%80%98long-term%e2%80%99-climate-sensitivity-of-6%c2%b0c-for-doubled-co2/#comment-11328 Earl Killian Tue, 22 Apr 2008 17:07:33 +0000 http://climateprogress.org/2007/10/01/another-must-read-from-hansen-%e2%80%98long-term%e2%80%99-climate-sensitivity-of-6%c2%b0c-for-doubled-co2/#comment-11328 Steve, over tens of millions of years the major trend (ignoring the smaller 100,000 year variations) has been the sun's output has increased while temperature has slowly fallen as CO2 has fallen. The exceptions have been events in Earth's history, such as the Paleocene-Eocene Thermal Maximum, where volcanoes and other sources added greenhouse gases to the atmosphere, and things warmed dramatically for a 100,000 years, and then CO2 and temperature both resumed their downward trend. So one concludes that temperature responds to CO2. There is a response to solar insolation which is well understood, but CO2 is capable of overwhelming that process, as shown by Earth's history. Steve, over tens of millions of years the major trend (ignoring the smaller 100,000 year variations) has been the sun’s output has increased while temperature has slowly fallen as CO2 has fallen. The exceptions have been events in Earth’s history, such as the Paleocene-Eocene Thermal Maximum, where volcanoes and other sources added greenhouse gases to the atmosphere, and things warmed dramatically for a 100,000 years, and then CO2 and temperature both resumed their downward trend. So one concludes that temperature responds to CO2. There is a response to solar insolation which is well understood, but CO2 is capable of overwhelming that process, as shown by Earth’s history.

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