A group of scientists led by the U.S. Geological Survey (USGS) have released a report discussing the current knowledge of abrupt climate change.
You can download the executive summary here. The report analyzes the likelihood of "abrupt climate change," which it defines as:
"A large-scale change in the climate system that takes place over a few decades or less, persists (or is anticipated to persist) for at least a few decades, and causes substantial disruptions in human and natural systems."
I further quote from the executive summary:
"This report considers progress in understanding four types of abrupt change in the paleoclimatic record that stand out as being so rapid and large in their impact that if they were to recur, they would pose clear risks to society in terms of our ability to adapt: (1) rapid change in glaciers, ice sheets, and hence sea level; (2) widespread and sustained changes to the hydrologic cycle; (3) abrupt change in the northward flow of warm, salty water in the upper layers of the Atlantic Ocean associated with the Atlantic Meridional Overturning Circulation (AMOC); and (4) rapid release to the atmosphere of methane trapped in permafrost and on continental margins."
The report reflects a greater understanding of abrupt climate change compared with five years ago, and goes into greater detail on this topic than did the 2007 Intergovernmental Panel on Climate Change (IPCC) Fourth Assessment Report.
The gist of the report is that:
1) the melt waters from the Greenland and Antarctic ice sheets are likely to contribute to greater sea-level rises than previous assessments have stated;
2) the U.S. Southwest could experience more intense droughts;
3) the Atlantic "conveyor belt" of warm water flowing from the southern latitudes to the North Atlantic and cold water flowing south, or AMOC, is likely to decrease from 25 to 30 percent during the 21st century, but not collapse; and
4) abrupt methane releases from heavily laden sources such as permafrost are unlikely but cannot be discounted (methane has more powerful heat-trapping effects than carbon dioxide, and one of the catastrophic feedback mechanisms that scientists warn about are massive natural methane releases from permafrost or methane hydrates in the oceans, releases that are precipitated by manmade greenhouse gases).
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Dear Friends,
ReplyDeleteAlthough you will not read/hear about it for some years in the media, the top story of the year is that global crude oil production peaked in 2008.
The media, governments, world leaders, and public should focus on this issue.
Global crude oil production had been rising briskly until 2004, then plateaued for four years. Because oil producers were extracting at maximum effort to profit from high oil prices, this plateau is a clear indication of Peak Oil.
Then in July and August of 2008 while oil prices were still very high, global crude oil production fell nearly one million barrels per day, clear evidence of Peak Oil (See Rembrandt Koppelaar, Editor of "Oil Watch Monthly," December 2008, page 1) http://www.peakoil.nl/wp-content/uploads/2008/12/2008_december_oilwatch_monthly.pdf. Peak Oil is now.
Credit for accurate Peak Oil predictions (within a few years) goes to the following (projected year for peak given in parentheses):
* Association for the Study of Peak Oil (2007)
* Rembrandt Koppelaar, Editor of “Oil Watch Monthly” (2008)
* Tony Eriksen, Oil stock analyst and Samuel Foucher, oil analyst (2008)
* Matthew Simmons, Energy investment banker, (2007)
* T. Boone Pickens, Oil and gas investor (2007)
* U.S. Army Corps of Engineers (2005)
* Kenneth S. Deffeyes, Princeton professor and retired shell geologist (2005)
* Sam Sam Bakhtiari, Retired Iranian National Oil Company geologist (2005)
* Chris Skrebowski, Editor of “Petroleum Review” (2010)
* Sadad Al Husseini, former head of production and exploration, Saudi Aramco (2008)
* Energy Watch Group in Germany (2006)
Oil production will now begin to decline terminally.
Within a year or two, it is likely that oil prices will skyrocket as supply falls below demand. OPEC cuts could exacerbate the gap between supply and demand and drive prices even higher.
Independent studies indicate that global crude oil production will now decline from 74 million barrels per day to 60 million barrels per day by 2015. During the same time, demand will increase. Oil supplies will be even tighter for the U.S. As oil producing nations consume more and more oil domestically they will export less and less. Because demand is high in China, India, the Middle East, and other oil producing nations, once global oil production begins to decline, demand will always be higher than supply. And since the U.S. represents one fourth of global oil demand, whatever oil we conserve will be consumed elsewhere. Thus, conservation in the U.S. will not slow oil depletion rates significantly.
Alternatives will not even begin to fill the gap. There is no plan nor capital for a so-called electric economy. And most alternatives yield electric power, but we need liquid fuels for tractors/combines, 18 wheel trucks, trains, ships, and mining equipment. The independent scientists of the Energy Watch Group conclude in a 2007 report titled: “Peak Oil Could Trigger Meltdown of Society:”
"By 2020, and even more by 2030, global oil supply will be dramatically lower. This will create a supply gap which can hardly be closed by growing contributions from other fossil, nuclear or alternative energy sources in this time frame."
With increasing costs for gasoline and diesel, along with declining taxes and declining gasoline tax revenues, states and local governments will eventually have to cut staff and curtail highway maintenance. Eventually, gasoline stations will close, and state and local highway workers won’t be able to get to work. We are facing the collapse of the highways that depend on diesel and gasoline powered trucks for bridge maintenance, culvert cleaning to avoid road washouts, snow plowing, and roadbed and surface repair. When the highways fail, so will the power grid, as highways carry the parts, large transformers, steel for pylons, and high tension cables from great distances. With the highways out, there will be no food coming from far away, and without the power grid virtually nothing modern works, including home heating, pumping of gasoline and diesel, airports, communications, and automated building systems.
It is time to focus on Peak Oil preparation and surviving Peak Oil.
http://survivingpeakoil.blogspot.com/
http://www.peakoilassociates.com/POAnalysis.html