Subscribe free to our newsletters via your
. 24/7 Space News .




SOLAR SCIENCE
Sunspot history suggests recent climate change not due to solar trends
by Staff Writers
Washington DC (SPX) Aug 10, 2015


illustration only

The Maunder Minimum, between 1645 and 1715, when sunspots were scarce and the winters harsh, strongly suggests a link between solar activity and climate change. Until now there was a general consensus that solar activity has been trending upwards over the past 300 years (since the end of the Maunder Minimum), peaking in the late 20th century - called the Modern Grand Maximum by some.

This trend has led some to conclude that the Sun has played a significant role in modern climate change. However, a discrepancy between two parallel series of sunspot number counts has been a contentious issue among scientists for some time.

The two methods of counting the sunspot number - the Wolf Sunspot Number and the Group Sunspot Number - indicated significantly different levels of solar activity before about 1885 and also around 1945. With these discrepancies now eliminated, there is no longer any substantial difference between the two historical records.

The new correction of the sunspot number, called the Sunspot Number Version 2.0, led by Frederic Clette (Director of the World Data Centre [WDC]-SILSO), Ed Cliver (National Solar Observatory) and Leif Svalgaard (Stanford University, California, USA), nullifies the claim that there has been a Modern Grand Maximum.

The results, presented at the IAU XXIX General Assembly in Honolulu, Hawai`i, make it difficult to explain the observed changes in the climate that started in the 18th century and extended through the industrial revolution to the 20th century as being significantly influenced by natural solar trends.

The sunspot number is the only direct record of the evolution of the solar cycle over multiple centuries and is the longest scientific experiment still ongoing.

The apparent upward trend of solar activity between the 18th century and the late 20th century has now been identified as a major calibration error in the Group Sunspot Number. Now that this error has been corrected, solar activity appears to have remained relatively stable since the 1700s.

The newly corrected sunspot numbers now provide a homogenous record of solar activity dating back some 400 years. Existing climate evolution models will need to be reevaluated given this entirely new picture of the long-term evolution of solar activity.

This work will stimulate new studies both in solar physics (solar cycle modelling and predictions) and climatology, and can be used to unlock tens of millennia of solar records encoded in cosmogenic nuclides found in ice cores and tree rings. This could reveal more clearly the role the Sun plays in climate change over much longer timescales.

The new data series and the associated information are distributed from WDC-SILSO.

Thanks for being here;
We need your help. The SpaceDaily news network continues to grow but revenues have never been harder to maintain.

With the rise of Ad Blockers, and Facebook - our traditional revenue sources via quality network advertising continues to decline. And unlike so many other news sites, we don't have a paywall - with those annoying usernames and passwords.

Our news coverage takes time and effort to publish 365 days a year.

If you find our news sites informative and useful then please consider becoming a regular supporter or for now make a one off contribution.

SpaceDaily Contributor
$5 Billed Once


credit card or paypal
SpaceDaily Monthly Supporter
$5 Billed Monthly


paypal only

.


Related Links
International Astronomical Union
Sunspot Index and Long-term Solar Observations
Solar Science News at SpaceDaily






Comment on this article via your Facebook, Yahoo, AOL, Hotmail login.

Share this article via these popular social media networks
del.icio.usdel.icio.us DiggDigg RedditReddit GoogleGoogle




Memory Foam Mattress Review
Newsletters :: SpaceDaily :: SpaceWar :: TerraDaily :: Energy Daily
XML Feeds :: Space News :: Earth News :: War News :: Solar Energy News





SOLAR SCIENCE
Can solar events trigger birth defects on Earth
Lawrence KS (SPX) Jul 21, 2015
Studies find airplane crews at high altitude are exposed to potentially harmful levels of radiation from cosmic rays. "Neutrons which don't reach the ground do reach airline altitude," said Adrian Melott, professor of physics and astronomy at the University of Kansas. "Flight crews get a lot more radiation dose from neutrons. In fact, during solar particle events, airplanes are diverted away fro ... read more


SOLAR SCIENCE
From a million miles away, NASA camera shows moon crossing face of Earth

NASA Could Return Humans to the Moon by 2021

Smithsonian embraces crowdfunding to preserve lunar spacesuit

NASA Sets Sights on Robot-Built Moon Colony

SOLAR SCIENCE
New Online Exploring Tools Bring NASA's Journey to Mars to New Generation

Six scientists to spend 365 days in HI-SEAS simulated Mars trip

Buckingham astrobiologists to look for life on Mars

NASA Mars Orbiter Preparing for Mars Lander's 2016 Arrival

SOLAR SCIENCE
Spaceflight may increase susceptibility to inflammatory bowel disease

Third spaceflight for astronaut Paolo Nespoli

New rocket could one day launch flight to Europa

ISU Educates Future Space Leaders

SOLAR SCIENCE
China to deploy space-air-ground sensors for environment protection

Chinese earth station is for exclusively scientific and civilian purposes

Cooperation in satellite technology put Belgium, China to forefront

China set to bolster space, polar security

SOLAR SCIENCE
NASA signs $490 mn contract with Russia for ISS travel

NASA Renews $490Mln Contract With Russian Space Agency

Space Kombucha in the search for life and its origin

Political Tensions Have No Impact on Space Cooperation- Roscosmos

SOLAR SCIENCE
Payload checkout is advancing for Arianespace's September Soyuz flight

ILS concludes Proton launch failure investigation

India to launch 9 US satellites in 2015, 2016

Payload fit-check for next Ariane 5 mission

SOLAR SCIENCE
Scientists solve planetary ring riddle

Overselling NASA

Exoplanets 20/20: Looking Back to the Future

Study: All planetary rings governed by particle distribution principle

SOLAR SCIENCE
Satcoms Linking Rural Schools in South Africa and Italy

Metal organic frameworks show unexpected flexibility

Yarn from slaughterhouse waste

Photoaging could reverse negative impact of ultraviolet radiation




The content herein, unless otherwise known to be public domain, are Copyright 1995-2014 - Space Media Network. All websites are published in Australia and are solely subject to Australian law and governed by Fair Use principals for news reporting and research purposes. AFP, UPI and IANS news wire stories are copyright Agence France-Presse, United Press International and Indo-Asia News Service. ESA news reports are copyright European Space Agency. All NASA sourced material is public domain. Additional copyrights may apply in whole or part to other bona fide parties. Advertising does not imply endorsement, agreement or approval of any opinions, statements or information provided by Space Media Network on any Web page published or hosted by Space Media Network. Privacy Statement All images and articles appearing on Space Media Network have been edited or digitally altered in some way. Any requests to remove copyright material will be acted upon in a timely and appropriate manner. Any attempt to extort money from Space Media Network will be ignored and reported to Australian Law Enforcement Agencies as a potential case of financial fraud involving the use of a telephonic carriage device or postal service.