Most Comprehensive Paleoclimate Reconstruction Confirms Hockey Stick

By Stefan Rahmstorf via Scilogs The past 2000 years of climate change have now been reconstructed in more detail than ever before by the PAGES 2k project. The results reveal interesting regional differences between the different continents, but also important common trends. The global average of the new reconstruction looks like a twin of the…

Past decade saw unprecedented warming in the deep ocean

By Phys.org: From 1975 on, the global surface ocean has shown a pronounced-though wavering-warming trend. Starting in 2004, however, that warming seemed to stall. Researchers measuring the Earth’s total energy budget-the balance of sunlight streaming in compared to the amount of light and heat leaving from the top of the atmosphere-saw that the planet was…

Understanding the long-term carbon-cycle: weathering of rocks – a vitally important carbon-sink

By John Mason / SkepticalScience   above: the processes of the long-term carbon-cycle that this post explores. Graphic: jg. This post delves into the long-term carbon cycle that involves the interactions of the atmosphere with rocks and oceans over many millions of years. Because of its length, I’ve broken it up into bookmarked sections for…

Hydrology & Water Systems Grand Challenges at the Interface of Climate

Grand Challenges at the Interface of Climate, Hydrology and Water Systems AGU Chapman Conference on Communicating Climate Science: A Historic Look to the Future 08 June 2013 — 13 June 2013, Granby, CO, USA Presenter: Peter Gleick Sunday, June 9, 2013, 3:40 p.m. – 4:00 p.m. Session: New and Bleeding Edge Topics in Climate Science…

Sea Level Rise (SLR) threaten Miami 1-2 meters projected

This video is a text to speech version of the post: Scientist: ‘Miami, As We Know It Today, Is Doomed. It’s Not A Question Of If. It’s A Question Of When.’ by Joe Romm from June 24 2013http://thinkprogress.org/climate/2013… Google Earth visualization of projected sea level changes of 1 – 2 meters by ClimateState Follow ClimateState…

ScienceCasts: The “Sleeping Giant” in Arctic Permafrost

Visit science.nasa.gov/ for breaking science news. Arctic permafrost soils contain more accumulated carbon than all the human fossil-fuel emissions since 1850 combined. Warming Arctic permafrost, poised to release its own gases into the atmosphere, could be the “sleeping giant” of climate change. NASA Finds ‘Amazing’ Levels Of Arctic Methane And CO2, Asks ‘Is a Sleeping Climate Giant Stirring…

Vast methane ‘plumes’ seen in Arctic ocean as sea ice retreats

The Independent, December 13, 2011: Dramatic and unprecedented plumes of methane – a greenhouse gas 20 times more potent than carbon dioxide – have been seen bubbling to the surface of the Arctic Ocean by scientists undertaking an extensive survey of the region. The scale and volume of the methane release has astonished the head…

Ups-and-downs of Indian monsoon rainfall likely to increase under warming

PIK June 20, 2013: Day-to-day rainfall in India might become much more variable due to climate change – potentially putting millions of poor farmers and the country’s agricultural productivity at risk. The Indian monsoon is a complex system which is likely to change under future global warming. While it is in the very nature of…

Secrets of Abrupt Climate Shifts revisited

The understanding of the puzzle about what is going on with our climate system and possible implications improved recently. Let’s begin with going back to 2006, here i quote an excerpt from the blog post “Revealed: Secrets of Abrupt Climate Shifts” via RealClimate, describing more robust understanding of the bipolar / see-saw mechanism of the…

Heatwaves blamed on Global Warming

Unusually high frequency points to human influence | NASA climatologist James Hansen made headlines during the US heatwave of 1988, declaring in testimony to Congress and during interviews on prime-time television that a build-up of greenhouse gases was increasing the probability of weather extremes. Now, as much of the United States sizzles through another torrid…

Fresh water from rivers and rain makes hurricanes, typhoons, tropical cyclones 50 percent more intense

An analysis of a decade’s worth of tropical cyclones shows that when hurricanes blow over ocean regions swamped by fresh water, the conditions can unexpectedly intensify the storm. Although the probability that hurricanes will hit such conditions is small, ranging from 10 to 23 percent, the effect is potentially large: Hurricanes can become 50 percent…