Global Warming's US Impacts and "Permanent Drying" in the Southwest
Belief:
Is Belief in God Hurting America?
David Villano
Corporate Accountability and WorkPlace:
The Vampire Banks Are Back: Will There Ever Be Meaningful Financial Reform?
Dean Baker
DrugReporter:
The War on Weed: Marijuana Is Basically Harmless -- The Monumentally Stupid Drug War Is Not
Jim Hightower
Environment:
White House Garden Won't Make Up for Obama's Nomination of Pesticide Lobbyist for US Chief Agriculture Negotiator
Jill Richardson
Food:
Don't Be Scared of Food: Are We Being Needlessly Hysterical About Food Safety?
David E. Gumpert
Health and Wellness:
47,000 Women Could Die As a Result of the New Mammogram Guidelines
George Lakoff
Immigration:
Hate Group, FAIR, Is Looking for "Ethnically Ambiguous" Actors to Amplify Its Racism
Adam Luna
Media and Technology:
The Memory Scrub About Why Ft. Hood Happened Is Almost Complete ... If It Weren't for Archives
Mark Ames
Movie Mix:
The Yes Men: Pranksters Out to Fix the World
Mark Engler
Politics:
Just When You Thought It Was Safe: 3 Potential Obstacles to Health-Care Reform
Adele M. Stan
Reproductive Justice and Gender:
Why Can't We Look Away From Sarah Palin?
Vanessa Richmond
Rights and Liberties:
Murder at Guantanamo? The Mysterious, Unsolved Death of Mohammad Saleh al Hanashi
Jeffrey S. Kaye
Sex and Relationships:
Hot Mormon Muffins and Models for Jesus: What's With All the Sexy Christians?
Liz Langley
Take Action:
G-20 Meetings: Nothing Much Happened in the Suites, and There Was Too Much Punch in the Streets
Laura Flanders
Water:
Poseidon's Financial Shell Game: Why Is a Private Desalination Plant Asking for Public Money?
Peter Gleick
World:
What Nidal Hasan, Timothy McVeigh, and the Beltway Sniper Have in Common: All Were Scarred by Pointless U.S. Wars
Nora Eisenberg
A major new report warns that on our current emissions path, we face the severe risk of abrupt climate change impacts. The basic conclusions themselves are nothing new — see "Startling new sea level rise research: "Most likely" 0.8 to 2.0 meters by 2100" and "Australia faces the "permanent dry" — as do we."
But what is stunning is that these warnings come from the United States Geological Survey — the Bush Administration (!). This new science-based report, Abrupt Climate Change, is thus a sobering book-end to the fantasy-based talking points released by the Administration today on how the President has "Taken Constructive Steps To Confront Climate Change."
This is a first-rate report from the USGS’s Climate Change Science Program. I highly recommend reading, Chapter 2, "Rapid Changes in Glaciers and Ice Sheets and their Impacts on Sea Level," and Chapter 3, "Hydrological Variability and Change." The chapters are much more readable than the IPCC reports, and the two together will make anyone an expert on what are perhaps the two most dangerous climate impacts that threaten this country.
The sea level rise conclusion, "based on an assessment of the published scientific literature" is:
Recent rapid changes at the edges of the Greenland and West Antarctic ice sheets show acceleration of flow and thinning, with the velocity of some glaciers increasing more than twofold. Glacier accelerations causing this imbalance have been related to enhanced surface meltwater production penetrating to the bed to lubricate glacier motion, and to ice-shelf removal, ice-front retreat, and glacier ungrounding that reduce resistance to flow. The present generation of models does not capture these processes. It is unclear whether this imbalance is a short-term natural adjustment or a response to recent climate change, but processes causing accelerations are enabled by warming, so these adjustments will very likely become more frequent in a warmer climate. The regions likely to experience future rapid changes in ice volume are those where ice is grounded well below sea level such as the West Antarctic Ice Sheet or large glaciers in Greenland like the Jakobshavn Isbrae that flow into the sea through a deep channel reaching far inland. Inclusion of these processes in models will likely lead to sea-level projections for the end of the 21st century that substantially exceed the projections presented in the IPCC AR4 report (0.28 ± 0.10 m to 0.42 ± 0.16 m rise).
See more stories tagged with: water, global warming, climate change, drought
Liked this story? Get top stories in your inbox each week from AlterNet! Sign up now »
You've chosen to turn comments off for the entire site. Would you like to turn them back on?
Support AlterNet
Do you value the information you're getting from AlterNet? Please show your support with a tax-deductible donation.
Feedback
Tell us how we're doing.