Dangerous Climate Change’’: Required Reduction of Carbon Emissions to Protect Young People, Future Generations and Nature

James Hansen, Pushker Kharecha, Makiko Sato, Valerie Masson-Delmotte, Frank Ackerman, David J. Beerling, Paul J. Hearty, Ove Hoegh-Guldberg, Shi-Ling Hsu, Camille Parmesan, Johan Rockstrom, Eelco J. Rohling, Jeffrey Sachs, Pete Smith, Konrad Steffen, Lise Van Susteren, Karina von Schuckmann, James C. Zachos Published: December 03, 2013 | DOI: 10.1371/journal.pone.0081648 | PDF Release URL Abstract We assess climate impacts of global warming using ongoing observations and paleoclimate data. We use Earth’s measured energy…

Climate Change, Clashes and Riots

Are recent clashes and riots affected by climate change? And if so to what extent? An exhaustive study of a wide range of conflicts over thousands of years has found that rising temperatures are inevitably linked to an increase in violence. Stand by for more violence. As planetary temperatures rise, so does the likelihood of…

Abrupt Climate Change In The Arctic (And Beyond) An Update

AGU Fall Meeting 2013: Our understanding of future Arctic change is informed by the history of past changes, which often have been both large and abrupt. The well-known ice-age events such as the Younger Dryas show how sea-ice changes can amplify forcing to produce very large responses, with wintertime sea ice especially important. These changes…

Global Warming Underestimated by Half

Uploaded on YouTube Aug 21, 2013: Coverage bias in the HadCRUT4 temperature series and its impact on recent temperature trends. Cowtan & Way (2013) Stefan Rahmstorf at RealClimate: A new study by British and Canadian researchers shows that the global temperature rise of the past 15 years has been greatly underestimated. The reason is the data gaps in…

IPCC: Climate Change Synthesis Report, Highlights


Published on YouTube Sep 30, 2013: For the 5th time in 23 years, the world’s leading climate scientists have released an update on the state of the climate. WeatherNation Chief Meteorologist reviews the highlights plus shares the panel’s predictions for the rest of the century.
Here’s a link for more information: http://www.ipcc.ch/

NASA: IPCC Projections of Temperature and Precipitation in the 21st Century

Published on YouTube Sep 27, 2013: New data visualizations from the NASA Center for Climate Simulation and NASA’s Scientific Visualization Studio show how climate models — those used in the new report from the United Nations’ Intergovernmental Panel on Climate Change (IPCC) — estimate how temperature and precipitation patterns could change throughout the 21st century.…

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…

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…

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…

Climate Extremes and the Carbon Cycle

A new study (doi:10.1038/nature12350) published in nature, explores the impacts of extreme weather events on the carbon cycle. By Bobby Magill / Wunderground, published: August 15, 2013: Devastating drought in the Southwest, unprecedented wildfire activity, scorching heat waves and other extreme weather are often cited as signs of a changing climate. But what if those extreme…

Heat Waves to Become Much More Frequent and Severe

Science Daily Aug. 15, 2013 — Climate change is set to trigger more frequent and severe heat waves in the next 30 years regardless of the amount of carbon dioxide (CO2) we emit into the atmosphere, a new study has shown. Extreme heat waves such as those that hit the US in 2012 and Australia…

Heat stress reduces labor capacity under climate warming

NOAA study about heat stress and projected labor impact: John P. Dunne, Ronald J. Stouffer, and Jasmin G. John. Journal: Nature Climate Change. DOI: 10.1038/nclimate1827 Key Findings Due to projected increases in temperature and water vapor in the atmosphere: Labor capacity losses related to heat stress are projected to double globally by 2050 with a warming climate. Global…

Global CH4 Atmospheric Methane Average 1811ppb(METOP-2)

Continuing the global CH4 methane average jump, on August 13, 2013 am, 0-12 hr, we hit a new high average of 1811 ppb. A comment at Arctic Sea Ice Forum notes: “Assumed methane emissions for the RCP scenarios; which clearly shows that we are now exceeding the methane emissions assumed for RCP 8.5; which is…