Navigation Links
AGU revises position on climate change
Date:1/25/2008

WASHINGTON A statement released on January 24 by the worlds largest scientific society of Earth and space scientiststhe American Geophysical Union, or AGUupdates the organizations position on climate change: the evidence for it, potential consequences from it, and how to respond to it.

The statement is the first revision since 2003 of the climate-change position of the AGU, which has a membership of 50,000 researchers, teachers, and students in 137 countries. The society adopted the statement at a meeting of AGUs leadership body, the AGU Council, in San Francisco, California, on 14 December 2007. AGU position statements expire in four years, unless extended by the Council.

Following is the text of the revised statement (also available online at http://www.agu.org/sci_soc/policy/positions/climate_change2008.shtml).

Human Impacts on Climate

The Earth's climate is now clearly out of balance and is warming. Many components of the climate systemincluding the temperatures of the atmosphere, land and ocean, the extent of sea ice and mountain glaciers, the sea level, the distribution of precipitation, and the length of seasonsare now changing at rates and in patterns that are not natural and are best explained by the increased atmospheric abundances of greenhouse gases and aerosols generated by human activity during the 20th century. Global average surface temperatures increased on average by about 0.6C over the period 19562006. As of 2006, eleven of the previous twelve years were warmer than any others since 1850. The observed rapid retreat of Arctic sea ice is expected to continue and lead to the disappearance of summertime ice within this century. Evidence from most oceans and all continents except Antarctica shows warming attributable to human activities. Recent changes in many physical and biological systems are linked with this regional climate change. A sustained research effort, involving many AGU members and summarized in the 2007 assessments of the Intergovernmental Panel on Climate Change, continues to improve our scientific understanding of the climate.

During recent millennia of relatively stable climate, civilization became established and populations have grown rapidly. In the next 50 years, even the lower limit of impending climate changean additional global mean warming of 1C above the last decadeis far beyond the range of climate variability experienced during the past thousand years and poses global problems in planning for and adapting to it. Warming greater than 2C above 19th century levels is projected to be disruptive, reducing global agricultural productivity, causing widespread loss of biodiversity, andif sustained over centuriesmelting much of the Greenland ice sheet with ensuing rise in sea level of several meters. If this 2C warming is to be avoided, then our net annual emissions of CO2 must be reduced by more than 50 percent within this century. With such projections, there are many sources of scientific uncertainty, but none are known that could make the impact of climate change inconsequential. Given the uncertainty in climate projections, there can be surprises that may cause more dramatic disruptions than anticipated from the most probable model projections.

With climate change, as with ozone depletion, the human footprint on Earth is apparent. The cause of disruptive climate change, unlike ozone depletion, is tied to energy use and runs through modern society. Solutions will necessarily involve all aspects of society. Mitigation strategies and adaptation responses will call for collaborations across science, technology, industry, and government. Members of the AGU, as part of the scientific community, collectively have special responsibilities: to pursue research needed to understand it; to educate the public on the causes, risks, and hazards; and to communicate clearly and objectively with those who can implement policies to shape future climate.


'/>"/>

Contact: Peter Weiss
pweiss@agu.org
202-777-7507
American Geophysical Union
Source:Eurekalert

Related biology news :

1. New model revises estimates of terrestrial carbon dioxide uptake
2. Socioeconomic position associated with effectiveness of HIV drugs
3. International team shows mercury concentrations in fish respond quickly to increased deposition
4. New study shows fish respond quickly to changes in mercury deposition
5. New study shows fish respond quickly to changes in mercury deposition
6. International team shows mercury concentrations in fish respond quickly to increased deposition
7. Does the victim affect snake venom composition?
8. Lets talk -- new paradigms in the research of the biomolecular composition of water
9. Scientists find predisposition to bronchiolitis in some babies
10. Too few women scientists achieving academic leadership positions
11. Record Attendance at the 2007 National Ergonomics Conference and Exposition
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:11/17/2016)... , Nov. 17, 2016  AIC announces that it has just released a ... organizations that require high-performance scale-out plus high speed data transfer storage solutions. ... ... ... Setting up a high performance ...
(Date:11/14/2016)...  xG Technology, Inc. ("xG" or the "Company") (Nasdaq: ... for use in challenging operating environments, announced its results ... will hold a conference call to discuss these results ... (details below). Key Recent Accomplishments ... agreement to acquire Vislink Communication Systems. The purchase is ...
(Date:6/22/2016)... , June 22, 2016   ... management and verification solutions, has partnered with ... software solutions for Visitor Management, Self-Service Kiosks ... provides products that add functional enhancements to ... provides corporations and venues with an automated ...
Breaking Biology News(10 mins):
(Date:12/2/2016)... ... December 01, 2016 , ... The Conference Forum has announced that the ... will take place on February 1-3, 2017 at the Roosevelt Hotel in New York ... program provides a unique 360-degree approach, which addresses the most up-to-date information regarding business ...
(Date:12/2/2016)... ... December 02, 2016 , ... ... and biotechnology companies dedicated to collaboratively developing improved chemistry, manufacturing and control ... vendor-supported, portable online UHPLC, with robust, probe-based sampling. , Online liquid ...
(Date:12/2/2016)... 2, 2016 The immunohistochemistry (IHC) market ... a CAGR of 7.3% during the forecast period of 2016 to ... laboratories segment accounted for the largest share of immunohistochemistry (IHC) market, ... , ... immunohistochemistry (IHC) market spread across 225 pages, profiling 10 companies and ...
(Date:11/30/2016)... today announced the appointment of Joshua F. Coleman , ... Dr. Coleman will oversee clinical content development and curation of ... software suite empowers molecular pathologists with a seamless workflow for ... from quality control through reporting. ... , , ...
Breaking Biology Technology: