Climate change has not been strongly influenced by solar activity, say researchers.
The findings overturn a widely held scientific view that lengthy periods of warm and cold weather in the past might have been caused by periodic fluctuations in solar activity.
Health Effects of Global Warming
Greenhouse effect causes excessive heat to build up in the earth's atmosphere causing global warming and affects the environment and health.
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Research examining the causes of climate change in the northern hemisphere over the past 1000 years has shown that until the year 1800, the key driver of periodic changes in climate was volcanic eruptions.
These tend to prevent sunlight reaching the Earth, causing cool, drier weather. Since 1900, greenhouse gases have been the primary cause of climate change.
![Quiz on Global Warming]( "Quiz on Global Warming")
The International Conference on Global Warming (GCGW-2012) will be held in Istanbul, Turkey on July 8-12, 2012. Take this quiz to learn what causes global warming, how it can affect your health, and what can be your contribution to contain it.
The findings show that periods of low sun activity should not be expected to have a large impact on temperatures on Earth, and are expected to improve scientists' understanding and help climate forecasting.
Scientists at the University of Edinburgh 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.
The study has been published in Nature GeoScience.
Source: ANI
Quiz on Global Warming
The International Conference on Global Warming (GCGW-2012) will be held in Istanbul, Turkey on July 8-12, 2012. Take this quiz to learn what causes global warming, how it can affect your health, and what can be your contribution to contain it.
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The findings show that periods of low sun activity should not be expected to have a large impact on temperatures on Earth, and are expected to improve scientists' understanding and help climate forecasting.
Scientists at the University of Edinburgh 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.
The study has been published in Nature GeoScience.
Source: ANI
Global Warming Continues To Be A Threat With No Change in Ozone Hole
Declining chlorine in the stratosphere has not yet caused a recovery of the ozone hole - formed annually over Antarctica, reveals NASA scientists.
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 Oceans are Absorbing Excess Heat from Global Warming: ResearchA new study has given insight to the idea that the oceans are taking up some of the excess heat. | Advertisement
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