technology-news

Greenhouse Gases, not sun, causing climate change: study

London, Dec 23 : And you thought hectic activities on sun's surface is causing our climate to go haywire?


A new scientific study has overturned a widely-held belief that awkward periods of warm and cold weather on earth in the past might have been caused by periodic fluctuations in solar activity.

The findings show that periods of low sun activity should not be expected to have a large impact on temperatures on earth.

"Until now, the influence of the sun on past climate has been poorly understood. We hope that our new discoveries will help improve our understanding of how temperatures have changed over the past few centuries, and improve predictions for how they might develop in future," said Andrew Schurer of the University of Edinburgh's School of GeoSciences.

Scientists at the university carried out the study using records of past temperatures constructed with data from tree rings and other historical sources. They compared this data record with computer-based models of past climate, featuring both significant and minor changes in the sun.

They found that their model of weak changes in the sun gave the best correlation with temperature records, indicating that solar activity has had a minimal impact on temperature in the past millennium.

So what is causing climate change on earth?

Blame it on greenhouse gases that have been the primary cause since 1900. Before that, research has shown that the key driver of periodic changes in climate was volcanic eruptions. These tend to prevent sunlight reaching Earth, causing cooler, drier weather.

The findings of the study have been published in the journal Nature GeoScience.

--IANS (Posted on 23-12-2013)

technology-news headlines

Plants that regulate sprouting tackle climate change well

Feeling hot? Make the clouds rain

Earth's extinction rate highly exaggerated: Study

Fingernails glow when you make a call!

Talk to your smart phone to unlock car!

Novel X-ray method for better screening at airports

Why Neanderthals never had brain disorders

Soon, attack drones that can attack from ocean floor

Thinnest ever porous membrane 100,000 times thinner than human hair developed

NASA's LADEE crashes on moon as planned

Sun emits M7-class solar flare

LED bulbs can make your white shirt ineffective!

Quick Links: Goa | Munnar | Pondicherry | Free Yearly Horoscope '2014

Comments

Your e-mail:


Your Full Name:


Type verification image:
verification image, type it in the box

Message:

Back to Top