Jet Stream & Arctic
Articles
Extreme Cold Snaps Could Worsen as Climate Change Shifts Polar Vortex 0124
As Simultaneous Crop Failures Threaten Food System Collapse, Plutocrats vs Us 0723 - Falling temperature contrast between the tropics and the polar region weakens and slows the "polar" jet stream (~40-55°N). So meanders are larger and more frequent in the north polar jet stream, leading to longer and hotter droughts, as well as longer rains and floods. These can decrease crop yields in North America, Europe and China simultaneously. The threat is worldwide famine.
‘Virtually Certain’ Extreme Antarctic Events Will Get Worse without Drastic Action 0823 - Some of them will affect the south polar jet stream, in somewhat similar ways to the north polar jet stream. Problem for crop yields in southern South America, and -somewhat less so - in Australia and New Zealand, south Africa, and temperate South America.
Scorching Heat and Canada Wildfires Could Be Tied to ‘Wavy, Blocky’ Jet Stream 0623
What’s the Role of Climate Change in a ‘Once in a Generation’ Storm? 1222
Click for more
Arctic Warming Could Be to Blame for Blasts of Extreme Cold 1222
The Arctic Is Becoming Wetter and Stormier 1222
Loss of Arctic Sea Ice to Give Rise to More of Strong El Niños 0922
How the Jet Stream Is Connected to Simultaneous Heat Waves Across the Globe 0722
‘Drastic’ Rise in High Arctic Lightning Worries Scientists 0122
Climate Change Has Destabilized Earth’s Poles, Imperiling the Rest of the Planet 1221
How Melting Arctic Sea Ice Caused $90 Billion Texas Freeze 0921
Arctic Climate Change May Not Be Making Winter Jet Stream Weird after All 0821
Big Winter Snows in the North Could Be Fueled by Arctic Sea Ice Loss 0421 - Remove sea ice. More water evaporates.
Climate-Driven Arctic Changes Are Interconnected, Says 2020 Report Card 1220
Warm Arctic, Cold Continents? - Counterintuitive, but Real 1120
Antarctic Ice Melt Related to Tropical Weather Shifts – a Game Changer? 0420
What an Ice-Free Arctic Really Means, and Why It Matters So Much 0919
Arctic Sea Ice Loss May Not Cause Cold Winters in the U.S. and Asia after All 0819
Lightning Struck within 300 Miles of the North Pole on Saturday 0819
Global Warming Is Messing with the Jet Stream, Bringing More Extreme Weather 1018
Summer Weather Is Getting 'Stuck', due to Arctic Warming 0818
The Controversial Link between Epic Storms and a Warming Arctic 0318
Why So Cold? Climate Change May Be Part of the Answer 0118
Arctic Warming Linked to Wet Summers and Snowy Winters in the UK 0118
Warmer Arctic Is the ‘New Normal' 1217
Ice Loss and the Polar Vortex - How a Warming Arctic Fuels Cold Snaps 0917
The Arctic as It Is Known Today Is Almost Certainly Gone 0417
An Unusually Warm Arctic Year - Sign of Future Climate Turmoil? 1216
Polar Vortex Shifting due to Climate Change, Extending Winter 1016
Arctic Warming Is Possibly Catastrophic for Planet, Climate Scientist Warns 0216
Rapid Arctic Ice Loss Linked to Extreme Weather Changes in Europe and US 0615
Arctic Melt Brings More Persistent Heat Waves to U.S., Europe 0315
Arctic Spitsbergen Faces an Ice-pocalypse 1114
Cold Winters in Europe, Asia Linked to Sea Ice Decline 1014
Melting Arctic Ice Link to Extreme Weather Explored 1014
Storms Are Becoming More Intense, Moving Toward Poles 1113
94° in Alaska? Weather Extremes Tied to Jet Stream 0613
Why the Jet Stream Is Slowing and Getting Wavier 0413
Climate Change Alters Jet Stream Patterns 0213
Violent Polar Storms Help Control Earth's Weather 1212
Arctic Ice Melt Could Mean More Extreme Winters for US, Europe 0912
Arctic Meltdown Triggers Colder Winters Nearby 0612
Arctic Warming is Changing World Weather Patterns 0412
Pre Industrial
Now
http://www.skepticalscience.com/news.php?n=1967
As the simple diagrams show, the temperature-gradient between the Arctic and the warmer latitudes has lessened. The strength of the jet stream is influenced by the size of the temperature gradient.
Wind speed is solid line, Ice area dashed, in million sq km.
Thus, warming the Arctic leads to a weakening of the jet stream (from 13.3 to 12.0 m/s over 30 years, at left) and a greater tendency to meander (right) as it slows down.
As this meandering develops, troughs may be expected to extend further southwards and ridges to push further northwards. However, recent research suggests a greater northwards component to this behavior; the Polar jet stream has moved northwards (see turquoise dotted line in the 3rd graph below).
Section Map: Weather & Sea Level Rise