Mexico



Very usefull links



PW
Bookstore





News links

AP

AFP

Aljazeera

Dow Jones

Oil price

Reuters

Bloomberg

Views and News
from
Norway

 

 

 

 

At risk of world heading towards irreversible 'hothouse' state

 

 

By Nina Chestney

LONDON

Petroleumworld 08 07 2018

The world is at risk of entering “hothouse” conditions where global average temperatures will be 4-5 degrees Celsius higher even if emissions reduction targets under a global climate deal are met, scientists said in a study published on Monday.

The report comes amid a heatwave that has pushed temperatures above 40C (104 Fahrenheit) in Europe this summer, causing drought and wildfires, including blazes in Greece in July that killed 91 people.

Around 200 countries agreed in 2015 to limit temperature rise to “well below” 2C (3.6F) above pre-industrial levels, a threshold believed to be a tipping point for the climate.

However, it is not clear whether the world's climate can be safely “parked” near 2C above pre-industrial levels or whether this might trigger other processes which drive further warming even if the world stops emitting greenhouse gases, the research said.

Currently, global average temperatures are just over 1C above the pre-industrial period and rising at 0.17C each decade.

Scientists from the Stockholm Resilience Center, the University of Copenhagen, Australian National University and the Potsdam Institute for Climate Impact Research said it is likely that if a critical threshold is crossed, several tipping points will lead to abrupt change.

Such processes include permafrost thaw; the loss of methane hydrates from the ocean floor; weaker land and ocean carbon sinks; the loss of Arctic summer sea ice and the reduction of Antarctic sea ice and polar ice sheets.

“These tipping elements can potentially act like a row of dominoes. Once one is pushed over, it pushes Earth towards another,” said Johan Rockström, co-author of the report published in the Proceedings of the National Academy of Sciences and executive director of the Stockholm Resilience Centre.

“It may be very difficult or impossible to stop the whole row of dominoes from tumbling over. Places on Earth will become uninhabitable if ‘Hothouse Earth' becomes the reality,” he said.

Maximising the chances of avoiding such a “hothouse” state requires more than just reducing greenhouse gas emissions, the report said.

For example, improved forest, agricultural and soil management; biodiversity conservation and technologies that remove carbon dioxide from the atmosphere and store it underground are needed.

Commenting on the research, some experts said uncontrolled warming is still uncertain but not implausible.

“In the context of the summer of 2018, this is definitely not a case of crying wolf, raising a false alarm: the wolves are now in sight,” said Phil Williamson, climate researcher at the University of East Anglia.

The study is available at: www.pnas.org/

________________________

Story by Nina Chestney; Editing by Catherine Evans from Reuters.

reuters.com
08 06 2018

We invite all our readers to share with us
their views and comments about this article.
Write to editor@petroleumworld.com

By using this link, you agree to allow PW
to publish your comments on our letters page.

Any question or suggestions,
please write to: editor@petroleumworld.com

Best Viewed with IE 5.01+ Windows NT 4.0, '95,
'98,ME,XP, Vista, Windows 7,8,10 +/ 800x600 pixels

Twitter: @petroleumworld1


November 13 - 15, 2018.

Gubkin University, Moscow
SPE Student Chapter

 

TOP

Contact: editor@petroleumworld.com,

Editor & Publisher:Elio Ohep/
Contact Email: editor@petroleumworld.com

CopyRight © 1999-2016, Paul Ohep F. - All Rights Reserved. Legal Information

PW in Top 100 Energy Sites

CopyRight©1999-2017, Petroleumworld ™  / Elio Ohep - All rights reservedThis site is a public free site and it contains copyrighted material the use of which has not always been specifically authorized by the copyright owner.We are making such material available in our efforts to advance understanding of business, environmental, political, human rights, economic, democracy, scientific, and social justice issues, etc. We believe this constitutes a 'fair use' of any such copyrighted material as provided for in section 107 of the US Copyright Law. In accordance with Title 17 U.S.C. Section 107, the material on this site is distributed without profit to those who have chosen to view the included information for research, information, and educational purposes. For more information go to: http://www.law.cornell.edu/uscode/17/107.shtml. If you wish to use copyrighted material from this site for purposes of your own that go beyond 'fair use', you must obtain permission fromPetroleumworld or the copyright owner of the material.