Tag Archives: climate change

Predicting Sea Ice Changes in Advance

December 11, 2015 — BOULDER – Climate scientists at the National Center for Atmospheric Research (NCAR) present evidence in a new study that they can predict whether the Arctic sea ice that forms in the winter will grow, shrink, or hold its own over the next several years.

The team of scientists has found that changes in the North Atlantic ocean circulation could allow overall winter sea ice extent to remain steady in the near future, with continued loss in some regions balanced by possible growth in others, including in the Barents Sea.
“We know that over the long term, winter sea ice will continue to retreat,” said NCAR scientist Stephen Yeager, lead author of the study published online today in the journal Geophysical Research Letters. “But we are predicting that the rate will taper off for several years in the future before resuming. We are not implying some kind of recovery from the effects of human-caused global warming; it’s really just a slow down in winter sea ice loss.”
The research was funded largely by the National Science Foundation, NCAR’s sponsor, with additional support from the National Oceanic and Atmospheric Administration and the U.S. Department of Energy.
Yeager is among a growing number of scientists trying to predict how the climate may change over a few years to a few decades, instead of the more typical span of many decades or even centuries. This type of “decadal prediction” provides information over a timeframe that is useful for policy makers, regional stakeholders, and others.
Decadal prediction relies on the idea that some natural variations in the climate system, such as changes in the strength of ocean currents, unfold predictably over several years. At times, their impacts can overwhelm the general warming trend caused by greenhouse gases released into the atmosphere by humans.
Yeager’s past work in this area has focused on decadal prediction of sea surface temperatures. A number of recent studies linking changes in the North Atlantic ocean circulation to sea ice extent led Yeager to think that it would also be possible to make decadal predictions for Arctic winter sea ice cover using the NCAR-based Community Earth System Model.

– See more at: https://www.sensorsandsystems.com/news/top-stories/corporate-news/37496-ncar-develops-method-to-predict-sea-ice-changes-years-in-advance.html#sthash.r0xOD5Gi.dpuf


DC Climathon Challege!!!

George Washington University is hosting the DC Climathon where teams can come together over 24 hours to create the best project around the climate change challenge (DC’s challenge is waste). The teams’ ideas are judged and then the winning teams are selected to continue working and potentially present at the UN’s COP21 in Paris. Attached is a flyer for the DC Climathon.

Learn more: http://www.climate-kic.org/climathon/#the-challenge

Feel free to email Meghan Chapple at GW if you are interested in participating.

Climate change = submerged cities. Coping strategies.

From the web:

Without serious preparation, most cities will be overwhelmed by rising waters. Here are some ideas for how to deal with climate change, from protective wetlands to shipping container reefs. Since most cities are built next to water, the risk of floods threatens more people than any other natural …


North Pole may be open enough for reinforced shipping by mid-century (ars technica)

“With Arctic sea ice reaching record lows, people have begun to explore routes through Canada’s Northwest Passage and the Northern Sea Route above the coast of Russia. These routes have the potential to significantly shorten transit times between Asia and both Europe and North America, reducing shipping costs and fostering international trade.     “North Pole may be open enough for reinforced shipping by mid-century

By mid-century, open water vessels (blue) could navigate above both Russia and Canada, while reinforced vessels could go straight across the pole.