17S6F Sun by Dave Lommen https://padlet.com/dave52/group9 Influence of the Sun on atmosphere and life en-us 2018-01-07 09:47:54 UTC 2018-01-08 06:37:14 UTC hello@padlet.com https://padlet.com/dave52/group9/wish/219233973 Energy from the Sun is very important to the Earth. The Sun warms our planet, heating the surface, the oceans and the atmosphere. This energy to the atmosphere is one of the primary drivers our weather. Our climate is also strongly affected by the amount of solar radiation received at Earth. That amount changes based on the Earth’s albedo, that is how much radiation is reflected back from the Earth’s surface and clouds.]]> 2018-01-08 06:01:21 UTC https://padlet.com/dave52/group9/wish/219233973 The ultraviolet and ionised solar particle emissions control the properties of the earth's upper atmosphere, including the global wind circulation and changes therein associated with intense auroral storms. https://padlet.com/dave52/group9/wish/219234152 2018-01-08 06:04:19 UTC https://padlet.com/dave52/group9/wish/219234152 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. https://padlet.com/dave52/group9/wish/219234374 2018-01-08 06:07:15 UTC https://padlet.com/dave52/group9/wish/219234374 https://padlet.com/dave52/group9/wish/219234491 The amount of radiation given off by the Sun changes with solar activity like solar flares or sunspots. Solar activity is known to vary in cycles, like the 11-yr sunspot cycle (and longer cycles). Some scientists have wondered if changes in our weather and climate might be linked with short or long term solar cycles. Weather is the current atmospheric conditions, including temperature, rainfall, wind, and humidity for a given area, while climate is the general weather conditions over a longer amount of time. This has been an active area of research for decades. It is an example of the scientific process.

]]> 2018-01-08 06:08:23 UTC https://padlet.com/dave52/group9/wish/219234491 https://padlet.com/dave52/group9/wish/219234622 Some scientists tried to find a link between changes in Earth’s weather and solar variability. Although some scientists reported such correlations, later studies have not been able to find the same result, casting in doubt or disproving the original studies. Examples include studies of the relationship between the number of sunspots and changes in wind patterns, or between cosmic rays and clouds.]]> 2018-01-08 06:09:40 UTC https://padlet.com/dave52/group9/wish/219234622 https://padlet.com/dave52/group9/wish/219234684 'More researchers have looked at the influence of solar variation on Earth’s climate, again with mixed success. Changes in sunspot cycles do change the amount of solar radiation given off by the Sun, but only by a little bit. These changes aren't enough to account for the majority of the warming observed in the atmosphere over the last half of the 20th century. The only way that climate models can match the observed warming of the atmosphere is with the addition of greenhouse gases. If you would like to learn more about the relationship between solar variation and climate, visit the Intergovernmental Panel on Climate Change’s Frequently Asked Questions section of their recent report.]]> 2018-01-08 06:10:15 UTC https://padlet.com/dave52/group9/wish/219234684 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.The short wavelength radiation is particularly effective in modifying ozone concentrations in the level of the atmosphere above where typical weather occurs. According to this hypothesis, modifications in the ozone layer could in turn filter down to that level of the atmosphere where our weather is formed, potentially modifying clouds and temperatures there. https://padlet.com/dave52/group9/wish/219234769 2018-01-08 06:11:12 UTC https://padlet.com/dave52/group9/wish/219234769