Remote Antarctic Trek Reveals A Glacier Melting From Below

September 15, 2013 by Richard Harris from NPR – Scientists watching Antarctica’s Pine Island Glacier from space have noticed with some alarm that it has been surging toward the sea. If it were to melt entirely, global sea levels would rise by several feet. Source NPR (with transcript) Related New Antarctic ice core reveals secrets…

Earth Energy Imbalance

James Hansen explains Earth energy imbalance from anthropogenic forcing and the urgency to act, because of the climate inertia. Earth’s Energy Imbalance By James Hansen, Makiko Sato, Pushker Kharecha and Karina von Schuckmann — January 2012   Deployment of an international array of Argo floats, measuring ocean heat content to a depth of 2000 m,…

Climate Sensitivity in the Anthropocene

Video: Dr. Kevin Trenberth explains general climate sensitivity on Earth. Study: Climate sensitivity in the Anthropocene M. Previdi, B. G. Liepert, D. Peteet, J. Hansen, D. J. Beerling, A. J. Broccoli, S. Frolking, J. N. Galloway, M. Heimann, C. Le Quere, S. Levitus and V. Ramaswamy | Source Climate sensitivity in its most basic form is…

Anoxia and Euxinia Ocean Environmental Change

Reconstructing the history of euxinia in a coastal sea Caroline P. Slomp, 2013 DOI 10.1130/focus0420131.1 Web http://geology.gsapubs.org/content/41/4/523.full Areas of the coastal ocean where oxygen is low or absent in bottom waters, so-called dead zones, are expanding worldwide (Diaz and Rosenberg, 2008). Increased inputs of nutrients from land are enhancing algal blooms, and the sinking of this…

Our Future In a World Without Ice Caps – Peter Ward

Brown Bag Lecture Series; Center for Student Engagement & Leadership; and Arts, Culture, and Civic Engagement Apr. 11, 2013: In honor of Earth Month: Peter D. Ward, Ph.D., is a paleontologist and professor of Geological Sciences at the University of Washington. Ward specializes in the Cretaceous-Tertiary extinction event (the one that killed the dinosaurs), the…

ESA Cryosat Animation of Arctic Sea Ice Thickness 2010-2013 with commentary

Via ESA, 11 September 2013: Offering new insights into our fragile polar regions, ESA’s CryoSat mission has provided three consecutive years of Arctic sea-ice thickness measurements, which show that the ice continues to thin. Although satellites have witnessed a downward trend in the extent of sea ice over the last two decades, it is essential to…

Global warming could change strength of El Nino

Via Phys.org September 11, 2013: Global warming could impact the El Niño Southern Oscillation (ENSO), altering the cycles of El Niño and La Niña events that bring extreme drought and flooding to Australia and many other Pacific-rim countries. New research published in Nature Geoscience using coral samples from Kiribati has revealed how the ENSO cycle has changed…

Life found in the sediments of an Antarctic subglacial lake for the first time

Video: What Lies Beneath: NASA Antarctic Sub Goes Subglacial NASA / JPL February 28, 2013: When researcher Alberto Behar from NASA’s Jet Propulsion Laboratory in Pasadena, Calif., joined an international Antarctic expedition last month on a trek to investigate a subglacial lake, he brought with him a unique instrument designed and funded by NASA to help…

Meet the NASA computer used for most climate simulations

The actual computer we do all of our climate simulations on (well, a little bit of it). pic.twitter.com/Z1qSFlgJwm — Gavin Schmidt (@ClimateOfGavin) July 16, 2013 System Architecture The system architecture is made up of multiple scalable units. The list below describes the total aggregate components of the system and its individual scalable units. Aggregate 67…

Bio-energy with carbon capture and storage

Bio-energy with carbon capture and storage (BECCS) is a greenhouse gas mitigation technology which produces negative carbon dioxide emissions by combining biomass use with geologic carbon capture and storage. The concept of BECCS is drawn from the integration of trees and crops, which extract carbon dioxide (CO2) from the atmosphere as they grow, the use…

Can scientists overcome huge uncertainties to pin down how close, or far, we might be to a tipping point?

A 2007 Royal Society paper by NASA scientist Drew Shindell: “… the rarity of palaeoclimate evidence for hydrate-induced climate changes argues that this is a fairly unlikely candidate for near-term sudden climate change. Unlike the others, however, anthropogenic climate change may alter the probability of hydrate release when compared with the past, making the overall…

Methane hydrate destabilization a potential scenario

Excerpts from an episode of History Channel’s “Mega Disasters” series. This explores the paper published by Northwestern University’s Gregory Ryskin. His thesis: the oceans can produce massive eruptions of explosive methane gas. Methane distribution in the water column: Once released into the water column, methane is distributed by currents and aerobic methane oxidation by bacteria…

Estimating northern polar CH4 flux

A compilation of related science with some commentary. Microbes in thawing permafrost: the unknown variable in the climate change equation David E Graham, Matthew D Wallenstein, Tatiana A Vishnivetskaya, Mark P Waldrop,Tommy J Phelps, Susan M Pfiffner, Tullis C Onstott, Lyle G Whyte, Elizaveta M Rivkina,David A Gilichinsky, Dwayne A Elias, Rachel Mackelprang, Nathan C…

World ocean heat content and thermosteric sea level change (0 – 2000 m), 1955 – 2010

S. Levitus, J. I. Antonov, T. P. Boyer,O. K. Baranova,H. E. Garcia,R. A. Locarnini,A. V. Mishonov,J. R. Reagan,D. Seidov,E. S. Yarosh, and M. M. Zweng | published 17 May 2012 Abstract We provide updated estimates of the change of ocean heat content(OHC) and the thermosteric component of sea level change of the 0–700 and 0–2000…