June 28, 2009
Report on Climate Change Impacts in the US
On June 16, the U.S. Global Change Research Program released the NOAA-led study, "Global Climate Change Impacts in the United States" - which it describes as a "state of knowledge" report about current and project impacts of global warming on the US. Climate-impacts-report full copy PDF The report is based on the accumulated body of scientific information from 21 US synthesis and assessment reports as well as the IPCC assessments.Executive-summary of climate impacts report The report includes separate assessments of various US regions (regional analyses) as well as various aspects of society such as human health, transportation, energy supply and use, water resources, agriculture and ecosystems (sector analyses).
The key findings of the report as described by the government are:
1. Global warming is unequivocal and primarily human-induced.
Global temperature has increased over the past 50 years. This observed increase is due primarily to human-induced emissions of heat-trapping gases. (p. 13)
2. Climate changes are underway in the United States and are projected to grow.
Climate-related changes are already observed in the United States and its coastal waters. These include increases in heavy downpours, rising temperature and sea level, rapidly retreating glaciers, thawing permafrost, lengthening growing seasons, lengthening ice-free seasons in the ocean and on lakes and rivers, earlier snowmelt, and alterations in river flows. These changes are projected to grow. (p. 27)
3. Widespread climate-related impacts are occurring now and are expected to increase. Climate changes are already affecting water, energy, transportation, agriculture, ecosystems, and health. These impacts are different from region to region and will grow under projected climate change. (p. 41-106, 107-152)

4. Climate change will stress water resources.
Water is an issue in every region, but the nature of the potential impacts varies. Drought, related to reduced precipitation, increased evaporation, and increased water loss from plants, is an important issue in many regions, especially in the West. Floods and water quality problems are likely to be amplified by climate change in most regions. Declines in mountain snowpack are important in the West and Alaska where snowpack provides vital natural water storage. (p. 41, 129, 135, 139)

5. Crop and livestock production will be increasingly challenged.
Agriculture is considered one of the sectors most adaptable to changes in climate. However, increased heat, pests, water stress, diseases, and weather extremes will pose adaptation challenges for crop and livestock production. (p. 71)6. Coastal areas are at increasing risk from sea-level rise and storm surge.
Sea-level rise and storm surge place many U.S. coastal areas at increasing risk of erosion and flooding, especially along the Atlantic and Gulf Coasts, Pacific Islands, and parts of Alaska. Energy and transportation infrastructure and other property in coastal areas are very likely to be adversely affected. (p. 111, 139, 145, 149)
7. Threats to human health will increase.
Health impacts of climate change are related to heat stress, waterborne diseases, poor air quality, extreme weather events, and diseases transmitted by insects and rodents. Robust public health infrastructure can reduce the potential for negative impacts. (p. 89)

8. Climate change will interact with many social and environmental stresses.
Climate change will combine with pollution, population growth, overuse of resources, urbanization, and other social, economic, and environmental stresses to create larger impacts than from any of these factors alone. (p. 99)
9. Thresholds will be crossed, leading to large changes in climate and ecosystems.
There are a variety of thresholds in the climate system and ecosystems. These thresholds determine, for example, the presence of sea ice and permafrost, and the survival of species, from fish to insect pests, with implications for society. With further climate change, the crossing of additional thresholds is expected. (p. 76, 82, 115, 137, 142)

10. Future climate change and its impacts depend on choices made today.
The amount and rate of future climate change depend primarily on current and future human-caused emissions of heat-trapping gases and airborne particles. Responses involve reducing emissions to limit future warming, and adapting to the changes that are unavoidable. (p. 25, 29)
June 28, 2009 in Climate Change | Permalink | Comments (0) | TrackBack
May 03, 2009
Total emisions approach - accurate but not novel and a flawed basis for policy
As this report on the new studies published in Nature indicates, the global warming problem is and always has been understood to be a matter of the total loadings of GHG emissions in the atmosphere, not a matter of timing. The timing of the GHG emissions only matters over the course of centuries because eventually greenhouse gases emitted into the atmosphere decompose. I don't think that anyone familiar with climate policy has ever believed otherwise. So, on that score the new studies are not new, but they may alter how the problem is conceptualized for policy purposes.
Policy cannot simply divide the total allowable emissions among nations and be done with it. First, absent intermediate goals tied to deadlines, countries cannot monitor each others compliance with reduction targets. Second, it creates a tendency for nations to believe that they can just wait until 2050 or whatever when technology will save them and voila they will become carbon neutral. Our experience in the Clean Air Act attainment with NAAQS was that, faced with a deadline and no requirement for annual progress, states just planned to do something at the last moment and when their plans didn't work, they threw up their hands and said, "OH well."
We cannot afford to use that model of regulation with respect to climate. Instead, we need to use technology-forcing technology based standards (e.g. no new coal plants without CSS; CSS retrofit for existing fossil-fuel plants by 2020) along with streamlining the ability of renewables to come online and planning ala the 1990 Clean Air Act amendments with annual progress requirements and contingency measures built into the plan. Those approaches would be far more successful than the "consume up to the last moment" strategy that may be encouraged by the total emissions approach.
Lawyers have to leave science to the scientists and use extreme care when they are working on a cross-disciplinary basis. But scientists need to be just as wary of providing policy concepts unencumbered by an understanding of past performance of various regulatory approaches.
From: Naomi Antony, Science and Development Network
Published April 30, 2009 10:40 AM
Scientists put carbon ceiling at a trillion tonnes
Scientists hope a new approach to assessing carbon build-up in the atmosphere will simplify issues
for policymakers and economists. Two papers published in Nature today (29 April) show that the
timings of carbon emissions are not relevant to the debate — it is the total amount of carbon dioxide
emitted over hundreds of years that is the key issue.
Rather than basing negotiations on short-term goals such as emission rates by a given year,
the researchers say the atmosphere can be regarded as a tank of finite size which we must not
overfill if we want to avoid a dangerous temperature rise.
Climate policy has traditionally concentrated on cutting emission rates by a given year, such as
2020 or 2050, without placing these goals within the overall context of needing to limit cumulative
emissions.
Both papers analyse how the world can keep the rise in average surface temperatures
down to no more than two degrees Celsius above pre-industrial levels. This figure is
widely regarded as the threshold beyond which the risk of dangerous climate change
rapidly increases. Policymakers around the world have adopted this limit as a goal.
The first study, led by Myles Allen from the University of Oxford, UK, found that
releasing a total of one trillion tonnes of carbon dioxide into the atmosphere
between 1750 and 2500 would cause a "most likely" peak warming of two degrees
Celsius. Emissions to 2008 have already released half of this. Allen said in a
press briefing this week (27 April): "It took 250 years to burn the
first half trillion tonnes and, on current predictions, we'll burn the next half
trillion in less than 40 years."
The second study, led by Malte Meinshausen at the Potsdam Institute for Climate
Impacts Research, Germany, used a computer model to demonstrate that to avoid
exceeding two degrees Celsius by 2100, cumulative carbon emissions must not exceed
0.9 trillion tonnes. "We have already emitted a third of a trillion in just the past nine years,"
Meinshausen says.
David Frame, a co-author of the Allen paper and researcher at the University of
Oxford, said that these findings make the problem "simpler" than it's often
portrayed. "[The findings] treat these emissions ... as an exhaustible resource. For
economists, this way of looking at the problem will be a huge simplification," Frame
said. "Basically, if you burn a tonne of carbon today, then you can't burn it tomorrow
" you've got a finite stock. It's like a tank that's emptying far too fast
for comfort. If country A burns it, country B can't. It forces everyone to consider
the problem as a whole."
In a separate essay, Stephen Schneider of the Woods Institute for the Environment at
Stanford University in the United States, discusses what a world with 1,000 parts
per million of carbon dioxide in its atmosphere might look like.
This article is reproduced with kind permission of the
Science and Development Network (SciDev.Net).
For more news and articles, visit www.scidev.net.
Nature Abstract of Allen letter:
Warming caused by cumulative carbon emissions towards the trillionth tonne
Myles R. Allen1, David J. Frame1,2, Chris Huntingford3, Chris D. Jones4, Jason A. Lowe5, Malte Meinshausen6 & Nicolai Meinshausen7
- Department of Physics, University of Oxford, OX1 3PU, UK
- Smith School of Enterprise and the Environment, University of Oxford, OX1 2BQ, UK
- Centre for Ecology and Hydrology, Wallingford, OX10 8BB, UK
- Met Office Hadley Centre, FitzRoy Road, Exeter, EX1 3PB, UK
- Met Office Hadley Centre (Reading Unit), Department of Meteorology, University of Reading, RG6 6BB, Reading, UK
- Potsdam Institute for Climate Impact Research, 14412 Potsdam, Germany
- Department of Statistics, University of Oxford, OX1 3TG, UK
Correspondence to: Myles R. Allen1 Correspondence and requests for materials should be addressed to M.R.A. (Email: myles.allen@physics.ox.ac.uk).
Abstract
Global efforts to mitigate climate change are guided by projections of future temperatures1. But the eventual equilibrium global mean temperature associated with a given stabilization level of atmospheric greenhouse gas concentrations remains uncertain1, 2, 3, complicating the setting of stabilization targets to avoid potentially dangerous levels of global warming4, 5, 6, 7, 8. Similar problems apply to the carbon cycle: observations currently provide only a weak constraint on the response to future emissions9, 10, 11. Here we use ensemble simulations of simple climate-carbon-cycle models constrained by observations and projections from more comprehensive models to simulate the temperature response to a broad range of carbon dioxide emission pathways. We find that the peak warming caused by a given cumulative carbon dioxide emission is better constrained than the warming response to a stabilization scenario. Furthermore, the relationship between cumulative emissions and peak warming is remarkably insensitive to the emission pathway (timing of emissions or peak emission rate). Hence policy targets based on limiting cumulative emissions of carbon dioxide are likely to be more robust to scientific uncertainty than emission-rate or concentration targets. Total anthropogenic emissions of one trillion tonnes of carbon (3.67 trillion tonnes of CO2), about half of which has already been emitted since industrialization began, results in a most likely peak carbon-dioxide-induced warming of 2 °C above pre-industrial temperatures, with a 5–95% confidence interval of 1.3–3.9 °C.
- Department of Physics, University of Oxford, OX1 3PU, UK
- Smith School of Enterprise and the Environment, University of Oxford, OX1 2BQ, UK
- Centre for Ecology and Hydrology, Wallingford, OX10 8BB, UK
- Met Office Hadley Centre, FitzRoy Road, Exeter, EX1 3PB, UK
- Met Office Hadley Centre (Reading Unit), Department of Meteorology, University of Reading, RG6 6BB, Reading, UK
- Potsdam Institute for Climate Impact Research, 14412 Potsdam, Germany
- Department of Statistics, University of Oxford, OX1 3TG, UK
Correspondence to: Myles R. Allen1 Correspondence and requests for materials should be addressed to M.R.A. (Email: myles.allen@physics.ox.ac.uk).
May 3, 2009 in Air Quality, Climate Change, Current Affairs, Economics, Energy, Governance/Management, International, Law, Legislation, Physical Science, Sustainability | Permalink | Comments (0) | TrackBack
April 29, 2009
AAAS Policy Alert
For those of you who try to stay current on science policy, I am a member of AAAS and receive its policy alerts. I encourage all of you to join and subscribe to Science. Here is today's policy alert:
AAAS Policy Alert -- April 29, 2009
President Addresses National Academies
President Obama addressed the Annual Meeting of the National Academy of Sciences on April 27 and called for a renewed commitment to basic scientific research and education. During his speech he stated that his goal would be to increase our nation's share of federal investment in research and development (R&D) to 3 percent of gross domestic product (GDP). In recent years, the share has hovered around 2.6 percent of GDP. Furthermore, Obama announced the membership of the President's Council of Advisors for Science and Technology (PCAST). Members include past AAAS President Shirley Ann Jackson of RPI, as well as former Board member Rosina Bierbaum and current AAAS Treasurer David Shaw. They join former AAAS President John Holdren who is both the U.S. President's science advisor and co-chair of PCAST.
Budget News
The House and Senate have nominated the conferees to resolve the differences between their respective versions of the FY 2010 budget resolution. House members include: Budget Committee Chairman John Spratt (D-SC), Ranking Member Paul Ryan (R-WI), and Reps. Allen Boyd (D-FL), Rosa DeLauro (D-CT) and Jeb Hensarling (R-TX). Senate members include Budget Committee Chair Kent Conrad (D-ND), Ranking Member Judd Gregg (R-NH) and Sen. Patty Murray (D-WA). The conferees met today (April 27) to begin deliberating over a consensus document.
Other Congressional News
Congressional Climate Change Update. The House Energy and Commerce Committee held four days of hearings
on the American Clean Energy and Security Act, with much debate on the
merits of moving ahead on the climate and energy package. Subcommittee
markup of the bill has been pushed back to next week, with details such
as how to allocate permits to emit greenhouse gases and how the
revenues will be used yet to be determined. Meanwhile Senate
Environment and Public Works Chairwoman Barbara Boxer (D-CA) announced
the formation of five working groups
to find compromises in several areas of concern: regional issues, cost
containment, targets and timetables, market oversight and coal research
and technology. The Senate Foreign Relations Committee
heard from Todd Stern, special envoy for climate change at the State
Department, who testified on the diplomatic cost of inaction on climate
change and emphasized the need for all countries - developed and
developing - to engage in negotiations with "common but differentiated
responsibilities." Stern is leading the first session of the Major Economies Forum on Energy and Climate
on April 27-28, a White House initiative to develop a dialogue among
major developed and developing economies on climate change.
New Bill Promotes Science Envoys. Last week, Senator Richard Lugar (R-IN) introduced legislation (S. 838)
that recognizes the importance of international scientific cooperation
and the work of organizations such as AAAS and the National Academies
in this area. The legislation tasks the State Department to appoint
Science Envoys to represent our nation and promote international
collaboration.
Executive Branch
Presidential Memo on Scientific Integrity. OSTP issued a Presidential Memo on scientific integrity in the April 23 Federal Register
and requests public comments on six principles for maintaining and
protecting the responsible use of science in decision-making. The memo
builds upon a March 9, 2009 memorandum from the President that called
on OSTP to issue a set of recommendations within 120 days. OSTP has
launched a blog
on the subject and is seeking comments on the selection of scientists
to serve in the executive branch, peer-review of science used in
policy-making, access to scientific data used in policy-making, and
whistleblower protection. Comments are due May 13, 2009.
NIH Stem Cell Guidelines Now Open for Comment. The NIH Guidelines for Human Stem Cell Research are now open for public comment until May 26.
NCI Director Speaks on Cancer Plan. National Cancer Institute Director John Niederhuber recently spoke of his institute's plans
in the wake of President Obama's cited goal of doubling funds for
cancer research. Included would be a boost in the NCI payline to fund
more meritorious research grants, as well as more grants to first-time
investigators and new faculty researchers. There will also be a focus
on personalized cancer care.
EPA Examines Ocean Acidification. On April 14, EPA issued a Federal Register notice
requesting information on ocean acidification, the changing of ocean
chemistry from increases in carbon dioxide that affects coral reefs and
other marine organisms. In response to a lawsuit by the Center for
Biological Diversity, EPA is trying to determine whether changes are
needed to the water quality criteria under the Clean Water Act.
Comments are due June 15, 2009.
Toxics Reporting Tightened. As mandated in the 2009 omnibus appropriations bill, EPA finalized changes to reporting requirements under the Toxics Release Inventory
that will take effect July 1. The final rules restore more stringent
reporting requirements than those from a Bush-era rule that raised the
pollution threshold for reporting. In 2006, AAAS submitted comments
stating that the increased threshold would "threaten the ability of
researchers to identify and understand potential threats to the
environment and public health in a scientifically rigorous manner."
FDA Widens Access to "Morning-After" Pill.
The Food and Drug Administration will now allow 17-year-olds to
purchase the Plan B "morning-after" pill without a prescription,
following a recent federal court order that it do so. The decision has
been labeled a "triumph of science over politics"
because of widespread concern that the previous administration
overruled scientific advice on making the pill available over the
counter, leading the FDA's top women's health official, Susan Wood, to resign in protest in 2005.
Nation's First CTO: Clarification. Last week's Policy Alert reported on the President's selection of Aneesh Chopra to be the nation's first chief technology officer. It has since been reported
that the CTO will also be one of the associate directors of the Office
of Science and Technology Policy (OSTP) concerned with overall
technology policy and innovation strategies across federal departments.
Chopra's position (which is subject to Senate confirmation) should not
be confused with that of Vivek Kundra, recently named Chief Information
Officer, who is located in the Office of Management and Budget (OMB),
overseeing day-to-day information technology spending and interagency
operations.
Elsewhere
Climate Risk Report Released.
Led by the Heinz Center and CERES, a coalition of insurance,
government, environmental, and investment organizations released a
report, Resilient Coasts: A Blueprint for Action that listed steps the nation can take to drastically reduce rising coastal hazard risks and their associated economic impacts.
Texas School Board Chairman Up for Confirmation.
Texas State Board of Education Chairman Don McLeroy, a vocal opponent
of teaching evolution, is up for Senate confirmation by the state
Senate, and during a recent hearing
some members of the Senate Nominations Committee expressed
dissatisfaction with McLeroy's performance. One state senator said
McLeroy has "created a hornet's nest" and noted that 15 bills filed
during this legislative session would strip powers from the state
school board. Even if McLeroy is not confirmed as chairman, he will
still remain a member of the board. In other news, the Institute for
Creation Research is now suing in U.S. District Court over the Texas
Higher Education Coordinating Board's decision to deny its request to
offer a master's degree in science education.
Animal Rights Activists Charged. Two animal rights activists have been arraigned on
charges of conspiracy, stalking and other crimes, including attempted
fire-bombing, against UCLA scientists engaged in animal research.
Publisher: Alan I. Leshner
Editor: Joanne Carney
Contributors: Erin Heath, Earl Lane, Steve Nelson, Al Teich, Kasey White
NOTE: The AAAS Policy Alert is a newsletter provided to AAAS Members to
inform them of developments in science and technology policy that may
be of interest. Information in the Policy Alert is gathered from
published news reports, unpublished documents, and personal
communications. Although the information contained in this newsletter
is regarded as reliable, it is provided only for the convenience and
private use of our members. Comments and suggestions regarding the
Policy Alert are welcome. Please write to alert@aaas.org.
April 29, 2009 in Climate Change, Energy, Governance/Management, Legislation, Physical Science, Science, Social Science, Sustainability, Toxic and Hazardous Substances, US, Water Resources | Permalink | TrackBack
April 28, 2009
Bending over backwards: Waxman and Markey grant Republicans another day of hearings on climate change bill
Listing the 40 days of hearings that have already been held, Waxman and Market nevertheless agree to hold another day of hearings on May 1, 2009. The list is a good beginning for a legislative history on the bill. hearings list I I just hope that the quality of witnesses is better than Newt Gingrich saying that he's still not sure that global warming is caused by humans.
April 28, 2009 in Air Quality, Climate Change, Current Affairs, Energy, Governance/Management, Legislation, Sustainability, US | Permalink | Comments (0) | TrackBack
April 22, 2009
G8 + 10 summit seeks consensus on climate change
International environmental ministers of G8 + 10 will meet tomorrow in Sicily to try to achieve consensus on climate change. President Obama's pledge to cut U.S. greenhouse gas emissions to 1990 levels by 2020 may be a catalyst, especially if the US is prepared to discuss specifics on how it intends to achieve that cut. The talks are part of the preparation for Copenhagen in December, when the Bali action plan anticipates a post-2012 deal will be signed. In addition to the G8 countries,China, India, Brazil, Mexico, Indonesia, South Africa, Australia, South Korea, Egypt and Denmark will be participating. Planet Ark has more on the Sicily talks.
April 22, 2009 in Climate Change | Permalink | TrackBack
Ocean acidification
According to the Science blog:
The U.S. Environmental Protection Agency has asked scientists how to revise the Clean Water Act to protect seas against ocean acidification from atmospheric carbon dioxide. Under the current rules, waters are designated as impaired if their pH deviates from naturally occurring levels by 0.2 units. But biologists say that some organisms are affected by smaller changes. A more complex approach would also take into account how organisms or ecosystems are affected differently by changing pH levels.
April 22, 2009 in Climate Change, International, Sustainability, Water Quality | Permalink | TrackBack
Catholic Coalition Pushes Climate Change Action
Grist reports:
Citing
dual obligations to care for God’s creation and the world’s poor, a
broad coalition of Catholic groups today announced a new commitment to
take action climate change.
The “St. Francis Pledge,” named after the patron saint of animals and ecology, urges Catholic to pray for those affected by climate change, learn about the problem, and take steps to reduce their own consumption and advocate for climate legislation that protects the world’s most vulnerable people.
“Our cars and power plants, more energy consumption and waste—we’re leaving a bigger carbon footprint,” reads a statement on the website of the umbrella group, the Catholic Climate Covenant. “Scientists tell us that means more climate change. Here and around the world, it is the poor who will be hit hardest. With more droughts, floods, hunger and joblessness. As faithful Catholics, we have a moral obligation to care for both Creation and the poor. Pope Benedict XVI insists, ‘Before it is too late, it is necessary to make courageous decisions’ to curb climate change.”
The group printed a similar message in an ad [PDF] on the New York Times op-ed page today. The campaign’s participants include the United States Conference of Catholic Bishops; Catholic Charities; the Catholic Health Association of the United States; Catholic Relief; the National Catholic Education Association; and the Conference of Major Superiors of Men and the Leadership Conference of Women Religious.
“What brings all these groups together are the Biblical call to be stewards of God’s creation and Jesus’ mandate to care ’for the least of these,’” Bishop William Skylstad, the campaign’s honorary chair, said in a prepared statement. “This prophetic connection in the life and example of St. Francis has fresh meaning for our response to the crisis of global climate change.”
The pledge does not endorse specific legislation or suggest specific personal actions, although it seeks to include measures to protect the world’s poor in U.S. climate legislation. (Check out the campaign’s video on its site or below.)
Neither does the campaign mention birth control, long a contentious issue between Catholic leaders and those environmentalists who believe population growth must be curbed. A reporter asked about population control during a conference call with organizers today. Bishop Skylstad said the global population was less important to the earth’s climate than the amount of resources humanity uses.
While environmental stewardship has deep roots in the Catholic Social Teaching tradition, evangelical Christians have made more news in recent years in advocating for and against action on climate change. (Grist’s 2006 special series on God & the Environment found much more hubbub on the issue from evangelicals.)
The emphasis in today’s announcement on the “least of these” who will be most harmed by climate change also jibes with Pope John Paul II’s widely quoted message from 1990:
“When the ecological crisis is set within the broader context of the search for peace within society, we can understand better the importance of giving attention to what the earth and its atmosphere are telling us: namely, that there is an order in the universe which must be respected, and that the human person, endowed with the capability of choosing freely, has a grave responsibility to preserve this order for the well-being of future generations. I wish to repeat that the ecological crisis is a moral issue.”
Pope Benedict XVI mentioned “disturbing climate change” among his concerns in his Easter message to the world last week.
April 22, 2009 in Climate Change | Permalink | TrackBack
Earth Week on Capitol Hill - News from Markey's Select Committee
TUESDAY 4/21:
-The Energy & Commerce Committee and the Subcommittee on Energy and the Environment began hearings on the Waxman-Markey climate change legislation.
-Speaker Nancy Pelosi held an event with House committee chairmen, faith and business leaders
-The Catholic Church launched an intiative to fight climate change and stand up for vulnerable communities in harms' way across the world.
-A new savings report released today from the Union of Concerned Scientists found that implementinga suite of energy, climate and transportation features would save consumers and businesses $465 billion in 2030 - including $900 on electricity bills and $580 on transportation.
MONDAY 4/20:
-China is outspending the United States in the race for clean energy technology and jobs, according to a new report by the Center for American Progress. The report suggests China is spending $12.6 million an hour to green their economy.
SUNDAY 4/19:
-Thousands gathered on the National Mall to kick off Earth Day events. Chairman Markey spoke before young climate activists as part of the Earth Day on the National Mall celebration. He was joined by Lisa Jackson, Administrator of the EPA, along with musical artists Moe and The Flaming Lips.
SATURDAY 4/18:
-At 103 events across the country, 70 members of Congress took part in Focus the Nation town hall events to discuss the clean energy economy and creating green jobs with students and community leaders across the country.
FRIDAY 4/17:
-The Environmental Protection Agency released a key finding: that global warming emissions pose a threat to public health and welfare.
April 22, 2009 in Climate Change | Permalink | TrackBack
April 20, 2009
Wilkins Shelf Ice Bridge Disintegrates
Montabay.com reported:
As though commenting on
world leader's lack of progress in combating climate change at the G20
conference last week, an ice bridge connecting the Wilkins Ice Shelf to
the Antarctic continent broke off over the weekend. Long expected by
scientists, the break is perhaps the beginning of the Wilkins Ice Shelf
completely coming loose from Antarctica.
Splitting at its thinnest point of 500 meters the 25-mile-long ice
bridge connected the Wilkins Ice Shelf to Charcot and Latardy islands.
The Wilkins Ice Shelf has become famous for being the largest of ten
Antarctic ice shelves to have collapsed or shrunk recently, most likely
due to rising temperatures in the Antarctic. In the past 50 years,
Antarctic temperature have risen approximately 3 degrees Celsius (5
degrees Fahrenheit), which is about three times the global surface
temperature increase.
Scientists worry that the loss of the ice bridge may allow
water currents to melt the Wilkins Ice Shelf far faster, eventually
leaving the ice shelf a disintegrating island.
April 20, 2009 in Climate Change | Permalink | Comments (1) | TrackBack
April 17, 2009
EPA releases endangerment finding
Here it is:
EPA GHG Endangerment Proposal -- Prepublication Copy
EPA Finds Greenhouse Gases Pose Threat to Public Health, Welfare / Proposed Finding Comes in Response to 2007 Supreme Court Ruling
Release date: 04/17/2009
Contact Information: Cathy Milbourn, 202-564-4355 / 7849 / milbourn.cathy@epa.gov; En español: Lina Younes, 202-564-4355 / younes.lina@epa.gov
(Washington, D.C. – April 17, 2009) After a
thorough scientific review ordered in 2007 by the U.S. Supreme Court,
the Environmental Protection Agency issued a proposed finding Friday
that greenhouse gases contribute to air pollution that may endanger
public health or welfare.
The proposed finding, which now moves to a public comment period, identified six greenhouse gases that pose a potential threat.
“This finding confirms that greenhouse gas pollution
is a serious problem now and for future generations. Fortunately, it
follows President Obama’s call for a low carbon economy and strong
leadership in Congress on clean energy and climate legislation,” said
Administrator Lisa P. Jackson. “This pollution problem has a solution –
one that will create millions of green jobs and end our country’s
dependence on foreign oil.”
As the proposed endangerment finding states, “In
both magnitude and probability, climate change is an enormous problem.
The greenhouse gases that are responsible for it endanger public health
and welfare within the meaning of the Clean Air Act.”
EPA’s proposed endangerment finding is based on
rigorous, peer-reviewed scientific analysis of six gases – carbon
dioxide, methane, nitrous oxide, hydrofluorocarbons, perfluorocarbons
and sulfur hexafluoride – that have been the subject of intensive
analysis by scientists around the world. The science clearly shows that
concentrations of these gases are at unprecedented levels as a result
of human emissions, and these high levels are very likely the cause of
the increase in average temperatures and other changes in our climate.
The scientific analysis also confirms that climate
change impacts human health in several ways. Findings from a recent EPA
study titled “Assessment of the Impacts of Global Change on Regional
U.S. Air Quality: A Synthesis of Climate Change Impacts on Ground-Level
Ozone,” for example, suggest that climate change may lead to higher
concentrations of ground-level ozone, a harmful pollutant. Additional
impacts of climate change include, but are not limited to:
- increased drought;
- more heavy downpours and flooding;
- more frequent and intense heat waves and wildfires;
- greater sea level rise;
- more intense storms; and
- harm to water resources, agriculture, wildlife and ecosystems.
In proposing the finding, Administrator Jackson also
took into account the disproportionate impact climate change has on the
health of certain segments of the population, such as the poor, the
very young, the elderly, those already in poor health, the disabled,
those living alone and/or indigenous populations dependent on one or a
few resources.
In addition to threatening human health, the
analysis finds that climate change also has serious national security
implications. Consistent with this proposed finding, in 2007, 11
retired U.S. generals and admirals signed a report from the Center for
a New American Security stating that climate change “presents
significant national security challenges for the United States.”
Escalating violence in destabilized regions can be incited and fomented
by an increasing scarcity of resources – including water. This lack of
resources, driven by climate change patterns, then drives massive
migration to more stabilized regions of the world.
The proposed endangerment finding now enters the
public comment period, which is the next step in the deliberative
process EPA must undertake before issuing final findings. Today’s
proposed finding does not include any proposed regulations. Before
taking any steps to reduce greenhouse gases under the Clean Air Act,
EPA would conduct an appropriate process and consider stakeholder
input. Notwithstanding this required regulatory process, both President
Obama and Administrator Jackson have repeatedly indicated their
preference for comprehensive legislation to address this issue and
create the framework for a clean energy economy.
More information: http://epa.gov/climatechange/endangerment.html
April 17, 2009 in Climate Change | Permalink | Comments (0) | TrackBack