Animations shows flooding in Boston that would result from a 100-year coastal storm surge with sea level rise of 0.60 meters (approximately 2 feet). Higher relative sea level will add to the base elevation of any storm surge, giving it more power to overtop both natural and constructed protection. Find out more at http://www.net.org/warming
Sea level rise viewer (U.S. only, sorry international plan fans): https://coast.noaa.gov/slr/
Sea level rise could submerge land currently home to up to 760 million people worldwide if global temperatures rise 4 degrees celsius by the year 2100. So what are cities and city planners going to do to minimize the potential devastation? Resources on this topic: Brecht, H., Dasgupta, S., Laplante, B., Murray, S., & Wheeler, D. (2012).
Coastal cities could see a rise in sea levels by as much as 4 ft by the end of the century. To help put a visual to the number, artist Nickolay Lamm created this series of simulations of US city landmarks as affected by sea levels rising 5, 12 and 25 feet. Using Climate Central’s sea level rise maps, Lamm imagines recognizable locales such as Venice Beach CA, Miami Beach FL, and Boston Harbor with catastrophic flooding. Produced by Rob Ludacer
Scientists warn increasingly rapid melting could trigger polar ‘tipping points’ with catastrophic consequences felt as far away as the Indian Ocean
Arctic scientists have warned that the increasingly rapid melting of the ice cap risks triggering 19 “tipping points” in the region that could have catastrophic consequences around the globe.
The Arctic Resilience Report found that the effects of Arctic warming could be felt as far away as the Indian Ocean, in a stark warning that changes in the region could cause uncontrollable climate change at a global level.
Temperatures in the Arctic are currently about 20C above what would be expected for the time of year, which scientists describe as “off the charts”. Sea ice is at the lowest extent ever recorded for the time of year.
“The warning signals are getting louder,” said Marcus Carson of the Stockholm Environment Institute and one of the lead authors of the report. “[These developments] also make the potential for triggering [tipping points] and feedback loops much larger.”
Climate tipping points occur when a natural system, such as the polar ice cap, undergoes sudden or overwhelming change that has a profound effect on surrounding ecosystems, often irreversible.
In the Arctic, the tipping points identified in the new report published on Friday, include: growth in vegetation on tundra, which replaces reflective snow and ice with darker vegetation, thus absorbing more heat; higher releases of methane, a potent greenhouse gas, from the tundra as it warms; shifts in snow distribution that warm the ocean, resulting in altered climate patterns as far away as Asia, where the monsoon could be effected; and the collapse of some key Arctic fisheries, with knock-on effects on ocean ecosystems around the globe.
The research, compiled by 11 organisations including the Arctic Council and six universities, comes at a critical time, not only because of the current Arctic temperature rises but in political terms.
Resilience; ARR; Arctic Resilience Report The Arctic Resilience Assessment (ARA) is an Arctic Council project led by the Stockholm Environment Institute and the Stockholm Resilience Centre. It builds on collaboration with Arctic countries and Indigenous Peoples in the region, as well as several Arctic scientific organizations. The ARA (previously Arctic Resilience Report) was approved as an Arctic Council project at the Senior Arctic Officials meeting in November 2011. The ARA was initiated by the Swedish Ministry of the Environment as a priority for the Swedish Chairmanship of the Arctic Council (May 2011 to May 2013) and is being delivered under the US Chairmanship of the Arctic Council.
Massive blow out craters formed by hydrate controlled methane expulsion from the Arctic seafloor: climate change science, biology, experiment, environment, glacier, climate control, Temperature, Carbon dioxide, earth weather.
Climate: https://youtu.be/aPPiVhecMvY Methane takes the quick way out Accounting for all the sources and sinks of methane is important for determining its concentration in the atmosphere. Andreassen et al. found evidence of large craters embedded within methane-leaking subglacial sediments in the Barents Sea, Norway. They propose that the thinning of the ice sheet at the end of recent glacial cycles decreased the pressure on pockets of hydrates buried in the seafloor, resulting in explosive blow-outs. This created the giant craters and released large quantities of methane into the water above.
Widespread methane release from thawing Arctic gas hydrates is a major concern, yet the processes, sources, and fluxes involved remain unconstrained. We present geophysical data documenting a cluster of kilometer-wide craters and mounds from the Barents Sea floor associated with large-scale methane expulsion. Combined with ice sheet/gas hydrate modeling, our results indicate that during glaciation, natural gas migrated from underlying hydrocarbon reservoirs and was sequestered extensively as subglacial gas hydrates. Upon ice sheet retreat, methane from this hydrate reservoir concentrated in massive mounds before being abruptly released to form craters. We propose that these processes were likely widespread across past glaciated petroleum provinces and that they also provide an analog for the potential future destabilization of subglacial gas hydrate reservoirs beneath contemporary ice sheets.
Welcome to Transition Studies. To prosper for very much longer on the changing Earth humankind will need to move beyond its current fossil-fueled civilization toward one that is sustained on recycled materials and renewable energy. This is not a trivial shift. It will require a major transition in all aspects of our lives.
This weblog explores the transition to a sustainable future on our finite planet. It provides links to current news, key documents from government sources and non-governmental organizations, as well as video documentaries about climate change, environmental ethics and environmental justice concerns.
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