Solar Lull Could Cause Colder Winters In Europe

Taco Cowboy writes "Since September of last year scientists have been wondering what's happening to the Sun. It's supposed to have reached the peak of its 11-year cycle, but sunspot and flare activity remains much quieter than expected. Experts now think the recent cold snap that hit North America and the wet weather that hit part of Europe might be linked to the eerie quietness of the Sun. According to the BBC, solar activity hasn't been this low in 100 years, and if activity keeps dropping, it may reach levels seen during the 'Maunder Minimum,' an 'era of solar inactivity in the 17th Century [which] coincided with a period of bitterly cold winters in Europe.' It wouldn't have a big effect on global temperatures, just regional ones. Why? The sun's UV output drops during these lulls, and the decreased amount of UV light hitting the stratosphere would cause the jet stream to change course. Prof. Mike Lockwood says, 'These are large meanders in the jet stream, and they're called blocking events because they block off the normal moist, mild winds we get from the Atlantic, and instead we get cold air being dragged down from the Arctic and from Russia. These are what we call a cold snap... a series of three or four cold snaps in a row adds up to a cold winter. And that's quite likely what we'll see as solar activity declines.'"

Comments

Not the sun

[Anonymous Coward]

The Sun does not effect climate. Only carbon.

Only carbon.

Re:Not the sun

[hey!]

Just to make it clear to folks who haven't followed this, the "ozone hole" is not a fixed feature of the Antarctic; it's like weather, it grows and shrinks in different years based on local atmospheric conditions, causing many to have declared premature victory. However the ozone levels in the Antarctic have stabilized and are expected to recover to pre-industrial levels over the coming decades.

This is not a case of the problem "fixing itself", it's a case of people deciding to take effective action by banning ozone depleting chemicals (thank you President Reagan).

OB: Global warming

[rueger]

Aha! Weather in some places that's colder or warmer than others! With stuff happening on the Sun.

Obviously Global Warming is a fiction created by neo-Luddite Green party members.

And communists. Yeah. Communists.

Re:OB: Global warming

[bill_mcgonigle]

Weather in some places that's colder or warmer than others!

Truly unprecedented in history.

Regardless of the predictive value of our models, let's raise some taxes.

Maunder Minimum

[Taco Cowboy]

Just a link to add for the " Mauder Minimum " that was mentioned in TFA -

http://solarscience.msfc.nasa.gov/SunspotCycle.shtml

Hope this helps !

Before this turns into a derpfest...

[Orp]

The NCAR link is probably the best for relating this to climate change:

So could a lengthy drop in solar output be enough to counteract human-caused climate change? Recent studies at NCAR and elsewhere have estimated that the total global cooling effect to be expected from reduced TSI during a grand minimum such as Maunder might be in the range of 0.1 to 0.3 Celsius (0.18 to 0.54 Fahrenheit). A 2013 study confirms the findings. This compares to an expected warming effect of 3.0C (5.4F) or more by 2100 due to greenhouse gas emissions. In other words, even a grand solar minimum might only be enough to offset one decade of global warming. Moreover, since greenhouse gases linger in the atmosphere, the impacts of those added gases would continue after the end of any grand minimum.

So perhaps a serious lull in solar activity could put some feeble brakes on global warming, slowing it down... temporarily, only to charge back when the sun gets over its issues.

I'm a meteorologist, not a climate guy, but I find the hypothesis that the current solar lull is responsible for the recent cold snaps in the northern hemisphere to be extremely dubious. Much more tenuous than the hypothesis that the meandering jet stream is happening due to the reduction in the north/south temperature gradient due from a reduction of Arctic ice cover, which itself is physically feasible but still not shown very conclusively.

The best way to get a grip on these issues would be to run many, many ensembles of weather models and coaxing out statistical links. And this is where weather/climate modeling is going, for good reasons... but as all the armchair slashdot climatologists will (perhaps rightly) point out, models have issues... but they are getting much better and ensembles help a lot to provide a handle on the probability that forcing A is causing response B.