Greenland ice sheet collapse, triggered ancient sea level rise 400,000 years ago

New evidence suggest that the longest interglacial (the time in between ice ages) – a warming period, called Marine Isotope Stage 11, more than 400,000 years ago, created nearly complete deglaciation of southern Greenland, thus contributed 4-6 meters to global sea level rise at that period. Overall se alevel rose about 6-13 meters above present…

Permafrost and the mysterious Crater/Sinkhole (Jamal, Siberia)

Evidence indicates that the Jamal sink hole (Siberia) has been caused by permafrost thaw, still under investigation. New footage (July, 18 2014) shows the crater in more detail, and Dan Miller explains the interconnections of climate change and permafrost. Anna Kurchatova: Siberia’s frozen soil — known as permafrost — contains millions of tons of methane…

NOAA, State of the Climate 2013 report: Climate Scientists See ‘Very Rapid Declines’

Access the report State of the Climate in 2013 (PDF) NBC: Leading climate scientists on Thursday issued their annual physical of Earth, comparing the planet in 2013 to a patient that’s only getting worse and highlighting problems with key vital signs: from record warmth in Australia and China to sea levels that continue to rise…

Tropospheric Ozone in the Anthropocene: Are We Creating a Toxic Atmosphere?

Published on Feb 19, 2014: Jack Fishman explains how elevated ozone levels damage plants, affecting crop yields. Factors among ozone levels include, precipitation and temperature. Further studies found that yields present a consistent function depending on the ozone concentrations. Laboratory simulations suggest that the findings of the yield decline are a trend, which is projected…

Earth from Space, the Pale Blue Dot

Wikipedia: The Pale Blue Dot is a photograph of planet Earth taken in 1990 by the Voyager 1 space probe from a record distance of about 6 billion kilometers (3.7 billion miles, 40 AU) from Earth, as part of the solar system Family Portrait series of images. In the photograph, Earth is shown as a fraction of a pixel (0.12 pixel in size) against the vastness of space. The Voyager 1 spacecraft,…

Methane explosion investigated as cause for mysterious Siberian sink hole (Update)

Salon: According to Anna Kurchatova, with the Sub-Arctic Scientific Research Centre, the hole could have to do with the thawing of Siberia’s permafrost, a consequence of global warming. The rapid release of gas previously trapped in the ice, she said, could have combined with sand beneath the surface to form an underground explosion. The Siberian…

The California drought and climate disruption

ClimateProgress covered the jet stream connection on Monday: It will be unseasonably chilly in the eastern part of the United States this week, due to a peculiar weather pattern that’s causing deep waves in the jet stream. One of those big waves is bringing cool air down from the northeast Pacific and the Arctic. This…

Ice cores what they reveal and how deniers distort the data

First posted in 2011, still popular on denialist blogs. Peter Sinclair explains:  A widely circulated piece of climate denial nonsense purports to use legitimate evidence from Greenland ice cores to debunk the record of global warming. Displaying temperature records out of context, and making the claim of legitimacy by citing the data, and it’s primary author,…

Time history of atmospheric carbon dioxide (2013 data)

Video credit: Andy Jacobson, CIRES/NOAA In 2013, Greenhouse gases continued to rise, 34 percent increase since 1990 NOAA reported in May 2014, about greenhouse gas observations, based on the Annual Greenhouse Gas Index (AGGI). Findings show that greenhouse gasses keep rising, a trend observed since the Industrial Revolution (1880s) and has accelerated in recent decades. The main contributor…

Why is Antarctic sea ice expanding?

By Laura Naranjo (NSIDC), first published January 31, 2014. In the following  an edited version, reposted here with permission. Antarctic sea ice is ruled by very different systems than Arctic sea ice. The reasons behind this increase are complex, and several recent studies show that scientists are still trying to understand them. Ice and wind Atmospheric…