Friday, May 16, 2014

More extreme weather can be expected

The heaviest rains and floods in 120 years have hit Serbia and Bosnia this week, Reuters and Deutsche Welle report.

The animation below shows the Jet Stream's impact on the weather. Cold temperatures have descended from the Arctic to Serbia and Bosnia in Europe and all the way down to the Gulf of Mexico in North America, while Alaska, California, and America's East Coast are hit by warm temperatures. In California, 'unprecedented' wildfires and fierce winds lead to 'firenadoes', reports CNN.

The image below shows that on May 15, 2014, the wind approaching Serbia and Bosnia at 700 hPa reached speeds of up to 120 km per hour (75 mph), as indicated by the green circle on the main image and inset.

The image below, from skeptical science, shows the cyclonic spin that can be expected in a through such as the one that hit Serbia and Bosnia recently.

As the Jet Stream changes, more extreme weather events can be expected. What makes the Jet Stream change? As the Arctic is warming up faster than the rest of the world, the temperature difference between the Arctic and the equator decreases, in turn decreasing the speed at which the Jet Stream circumnavigates the globe. This can cause 'blocking patterns', with extreme weather events hitting an area longer than before.

As the jet stream becomes wavier, cold air can more easily descend from the Arctic down to lower latitudes in a downward through of the Jet Stream, while warm air can more easily reach higher latitudes in an upward ridge of the Jet Stream.

This spells bad news for many areas across the world that can be expected to be hit by more extreme weather events such as heatwaves, wildfires fuelled by stronger winds and more intense drought, storms and floods.

Heatwaves are a huge threat in the Arctic, especially when followed by storms that can cause warm surface water to mix down to the bottom of the sea and warm up sediments under the seafloor that can contain huge amounts of methane in the form of hydrates and free gas. The situation is dire and calls for comprehensive and effective action, as discussed at the Climate Plan blog.


- Extreme weather strikes around the globe - update

- Escalating extreme weather events to hammer humanity (by Paul Beckwith)

- Our New Climate and Weather (by Paul Beckwith)

- Our New Climate and Weather - part 2 (by Paul Beckwith)

- Changes to Polar Vortex affect mile-deep ocean circulation patterns

- Polar jet stream appears hugely deformed


  1. Business world might zoom, assuming both that Earth runaway list of problems weren't going into end shock snap and second, that change was allowed to root core value of money, disabling its inability to see a duty to protect Open Systems of Nature Large that hold Earth safe within HZ.. But the world worm of Corporate Power wants shadow gov 4X ability to play $, -Jack oil.. Little Guys need all Aces.

  2. Per a few days in the Arctic all hell breaks loose. Dipole and "fiery death' from Siberia.