Best of the Week
Most Popular
1. Gold vs Cash in a Financial Crisis - Richard_Mills
2.Current Stock Market Rally Similarities To 1999 - Chris_Vermeulen
3.America See You On The Dark Side Of The Moon - Part2 - James_Quinn
4.Stock Market Trend Forecast Outlook for 2020 - Nadeem_Walayat
5.Who Said Stock Market Traders and Investor are Emotional Right Now? - Chris_Vermeulen
6.Gold Upswing and Lessons from Gold Tops - P_Radomski_CFA
7.Economic Tribulation is Coming, and Here is Why - Michael_Pento
8.What to Expect in Our Next Recession/Depression? - Raymond_Matison
9.The Fed Celebrates While Americans Drown in Financial Despair - John_Mauldin
10.Hi-yo Silver Away! - Richard_Mills
Last 7 days
Silver Springboards Higher – What’s Next? - 26th May 20
Stock Market Key Resistance Breakout Is Where the Rubber Meets the Road - 26th May 20
5 Ways To Amp Up Your CFD Trading Today - 26th May 20
The Anatomy of a Gold Stock Bull Market - 26th May 20
Stock Market Critical Price Level Could Soon Prompt A Big Move - 25th May 20
Will Powell Decouple Gold from the Stock Market? - 25th May 20
How Muslims Celebrated EID in Lockdown Britain 2020 - UK - 25th May 20
Stock Market Topping Behavior - 24th May 20
Fed Action Accelerates Boom-Bust Cycle; Not A Virus Crisis - 23rd May 20
Gold Silver Miners and Stocks (after a quick drop) Ready to Explode - 23rd May 20
3 Ways to Prepare Financially for Retirement - 23rd May 20
4 Essential Car Trade-In Tips To Get The Best Value - 23rd May 20
Budgie Heaven at Bird Land - 23rd May 20
China’s ‘Two Sessions’ herald Rebound of Economy - 22nd May 20
Signs Of Long Term Devaluation US Real Estate - 22nd May 20
Reading the Tea Leaves of Gold’s Upcoming Move - 22nd May 20
Gold, Silver, Mining Stocks Teeter On The Brink Of A Breakout - 21st May 20
Another Bank Bailout Under Cover of a Virus - 21st May 20
Do No Credit Check Loans Online Instant Approval Options Actually Exist? - 21st May 20
An Eye-Opening Perspective: Emerging Markets and Epidemics - 21st May 20
US Housing Market Covid-19 Crisis - 21st May 20
The Coronavirus Just Hit the “Fast-Forward” Button on These Three Industries - 21st May 20
AMD Zen 3 Ryzen 9 4950x Intel Destroying 24 core 48 thread Processor? - 21st May 20
Dow Stock Market Trend Analysis and Forecast - 20th May 20
The Credit Markets Gave Their Nod to the S&P 500 Upswing - 20th May 20
Where to get proper HGH treatment in USA - 20th May 20
Silver Is Ensured A Prosperous 2020 Thanks To The Fed - 20th May 20
It’s Not Only Palladium That You Better Listen To - 20th May 20
DJIA Stock Market Technical Trend Analysis - 19th May 20
US Real Estate Showing Signs Of Covid19 Collateral Damage - 19th May 20
Gold Stocks Fundamental Indicators - 19th May 20
Why This Wave is Usually a Market Downturn's Most Wicked - 19th May 20
Gold Mining Stocks Flip from Losses to 5x Leveraged Gains! - 19th May 20
Silver Price Begins To Accelerate Higher Faster Than Gold - 19th May 20
Gold Will Soar Soon; World Now Faces 'Monetary Armageddon' - 19th May 20
Gold Mining Stocks Fundamentals - 18th May 20
Why the Largest Cyberattack in History Will Happen Within Six Months - 18th May 20
New AMD Ryzen 4900x and 4950x Zen3 4th Gen Processors Clock Speed and Cores Specs - 18th May 20
Learn How to Play the Violin, Kids Activities and Learning During Lockdown - 18th May 20
The Great Economy Reopening Gamble - 17th May 20
Powell Sends a Message With Love for Gold - 17th May 20
An Economic Renaissance Emerges – Stock Market Look Out Below - 17th May 20
Learn more about the UK Casino Self-exclusion - 17th May 20
Will Stocks Lead the Way Lower for Gold Miners? - 15th May 20
Are Small-Cap Stocks (Russell 2k) Headed For A Double Dip? - 15th May 20
Coronavirus Will Wipe Out These Three Industries for Good - 15th May 20
Gold and Silver: As We Go from Deflation to Hyperinflation - 15th May 20

Market Oracle FREE Newsletter

Coronavirus-stocks-bear-market-2020-analysis

Puzzling Collapse Of Earth's Upper Atmosphere

Politics / Climate Change Jul 21, 2010 - 04:38 AM GMT

By: Global_Research

Politics

Best Financial Markets Analysis ArticleDr. Tony Phillips writes: NASA-funded researchers are monitoring a big event in our planet's atmosphere. High above Earth's surface where the atmosphere meets space, a rarefied layer of gas called "the thermosphere" recently collapsed and now is rebounding again.


"This is the biggest contraction of the thermosphere in at least 43 years," says John Emmert of the Naval Research Lab, lead author of a paper announcing the finding in the June 19th issue of the Geophysical Research Letters (GRL). "It's a Space Age record."

The collapse happened during the deep solar minimum of 2008-2009-a fact which comes as little surprise to researchers. The thermosphere always cools and contracts when solar activity is low. In this case, however, the magnitude of the collapse was two to three times greater than low solar activity could explain.

"Something is going on that we do not understand," says Emmert.

The thermosphere ranges in altitude from 90 km to 600+ km. It is a realm of meteors, auroras and satellites, which skim through the thermosphere as they circle Earth. It is also where solar radiation makes first contact with our planet.

The thermosphere intercepts extreme ultraviolet (EUV) photons from the sun before they can reach the ground. When solar activity is high, solar EUV warms the thermosphere, causing it to puff up like a marshmallow held over a camp fire. (This heating can raise temperatures as high as 1400 K-hence the name thermosphere.) When solar activity is low, the opposite happens.

Lately, solar activity has been very low. In 2008 and 2009, the sun plunged into a century-class solar minimum. Sunspots were scarce, solar flares almost non-existent, and solar EUV radiation was at a low ebb. Researchers immediately turned their attention to the thermosphere to see what would happen.

How do you know what's happening all the way up in the thermosphere?

Emmert uses a clever technique: Because satellites feel aerodynamic drag when they move through the thermosphere, it is possible to monitor conditions there by watching satellites decay. He analyzed the decay rates of more than 5000 satellites ranging in altitude between 200 and 600 km and ranging in time between 1967 and 2010.

This provided a unique space-time sampling of thermospheric density, temperature, and pressure covering almost the entire Space Age. In this way he discovered that the thermospheric collapse of 2008-2009 was not only bigger than any previous collapse, but also bigger than the sun alone could explain.

One possible explanation is carbon dioxide (CO2).

When carbon dioxide gets into the thermosphere, it acts as a coolant, shedding heat via infrared radiation. It is widely-known that CO2 levels have been increasing in Earth's atmosphere. Extra CO2 in the thermosphere could have magnified the cooling action of solar minimum.

"But the numbers don't quite add up," says Emmert. "Even when we take CO2 into account using our best understanding of how it operates as a coolant, we cannot fully explain the thermosphere's collapse."

According to Emmert and colleagues, low solar EUV accounts for about 30% of the collapse. Extra CO2 accounts for at least another 10%. That leaves as much as 60% unaccounted for.

In their GRL paper, the authors acknowledge that the situation is complicated. There's more to it than just solar EUV and terrestrial CO2. For instance, trends in global climate could alter the composition of the thermosphere, changing its thermal properties and the way it responds to external stimuli. The overall sensitivity of the thermosphere to solar radiation could actually be increasing.

"The density anomalies," they wrote, "may signify that an as-yet-unidentified climatological tipping point involving energy balance and chemistry feedbacks has been reached."

Or not.

Important clues may be found in the way the thermosphere rebounds. Solar minimum is now coming to an end, EUV radiation is on the rise, and the thermosphere is puffing up again. Exactly how the recovery proceeds could unravel the contributions of solar vs. terrestrial sources.

"We will continue to monitor the situation," says Emmert.

NASA Science

Global Research Articles by Tony Phillips

© Copyright Dr. Tony Phillips , Global Research, 2010

Disclaimer: The views expressed in this article are the sole responsibility of the author and do not necessarily reflect those of the Centre for Research on Globalization. The contents of this article are of sole responsibility of the author(s). The Centre for Research on Globalization will not be responsible or liable for any inaccurate or incorrect statements contained in this article.


© 2005-2019 http://www.MarketOracle.co.uk - The Market Oracle is a FREE Daily Financial Markets Analysis & Forecasting online publication.


Post Comment

Only logged in users are allowed to post comments. Register/ Log in

6 Critical Money Making Rules