Relationship between solar radiation and climate change

Climate - Solar radiation and temperature |

relationship between solar radiation and climate change

With a total solar eclipse sweeping across North America, everyone is suddenly paying attention to the sun, but does solar activity cause climate change? together estimates of the sun's output – called Total Solar Irradiance, or TSI . for non-commercial use, credited 'Carbon Brief' with a link to the article. Plots of the most recent solar irradiance can be found at the Laboratory for climate change, but from on there was _no_ correlation between solar. In addition to these rapid, short-term fluctuations, there is an link between small changes in solar irradiance and the increase in Earth's surface.

It has been suggested that changes in solar output might affect our climate—both directly, by changing the rate of solar heating of the Earth and atmosphere, and indirectly, by changing cloud forming processes.


Over the time-scale of millions of years, the change in solar intensity is a critical factor influencing climate e. However, changes in the rate of solar heating over the last century cannot account for the magnitude of the rise in global mean temperature since the late s.

Are changes in solar radiation contributing to global warming?

relationship between solar radiation and climate change

The bottom two black spots on the sun, known as sunspots, appeared quickly over the course of Feb. These two sunspots are part of the same system and are over six Earths across. The evidence collected show that the sun noticeably affects our climate over millions of years, but it is not the cause of recent warming. TSI fluctuates slightly from day to day and week to week. Two different hypotheses have been proposed to test whether solar radiation can explain climate change.

NASA The first hypothesis relies on the fact that in both the 11 year cycle and, in the longer term, the changes in solar energy are highest at ultraviolet short wavelengths.

Climate Science Glossary

The short wavelength radiation is particularly effective in modifying ozone concentrations in the level of the atmosphere above where typical weather occurs. A series of model calculations were used to examine the differing effects of natural variability, carbon dioxide and other greenhouse gases, sulfate particles, and changing solar output, on the climate of the 20th century.

In general, these calculations make it clear that it is scientifically very difficult to construct an explanation for the 20th century warming that does not include a major role for the added greenhouse gases resulting from human activities.

relationship between solar radiation and climate change

Based on the above calculations, and the observational records of climate change for the 20th century, the following conclusions are drawn: Global climate of the 20th century has warmed by 0. Natural unforced climate variability cannot explain the magnitude of the observed warming over the 20th century. Solar irradiance variations are large enough to shape, but not dominate, the observed warming.

The extended warming period between can be explained by natural variability plus added greenhouse gases.

relationship between solar radiation and climate change

It can also be explained by added greenhouse gases plus increased solar irradiance. Added greenhouse gases provide, by far, the most plausible hypothesis for explaining the warming of the 20th century.

She has worked closely with Dr.

'Solar radiation management': Scientists hope to fight climate change with geoengineering

Lean has published over 60 peer-reviewed scientific papers and over 20 conference proceedings in the scientific literature, and has given more than presentations at scientific meetings, seminars, colloquia and lectures.

Lean has also testified before Congress on the role of solar radiation and solar variation in climate change.

How Does the Sun Affect Our Climate?

She received her Ph. At the same time, there is no doubt that solar radiation supplying light and heat to the Earth is of the greatest importance in the climate genesis and life development on the planet.

Solar radiation is the main energy source that determines the radiation and thermal balance of the Earth, its surface, atmosphere and the World Ocean, along with the thermal conditions of the biosphere Zubov, ; Alisov et al. Solar climate is theoretically measured amount of incoming and distributed solar radiation in the outer atmosphere or on the surface of the Earth in the absence of the atmosphere Milankovich, ; Alisov, Poltaraus, ; Monin, Shishkov, ; Drozdov et al.

Variations of solar radiation coming to the Earth are defined by two major reasons of different physical nature. Studies of the solar radiation variations related to physical activity of the Sun were initiated long time ago.

The issue concerning the connection between solar activity changes and climate changes has also been discussed for a long time and still remains unsolved Abbot, ; Eigenson,; Kondratyev, Nikolskiy, ; Vitinskiy, ; Beer et al. This website provides study results on solar climate variations related to celestial and mechanical processes. Changes in solar activity are not taken into consideration.