The Sun-Weather Connection

The Sun and the weather.  (Climate change, the weather, is affected by space weather, solar weather, every day.)

The energy that the Earth receives from the Sun is the basic cause of our changing weather, ie CLIMATE CHANGE.

Solar heat warms the huge air masses that comprise large and small weather systems. The day-night and summer-winter cycles in the weather have obvious causes and effects. There are other ways in which the Sun affects weather and climate. Solar activity such as sunspots, flares, coronal holes, or other forms of solar activity affect or day to day weather and are now beginning to be able to be predicted.

The effects of currently observed changes in the Sun - small variations in light output, the occurrence of solar particle streams and magnetic fields are very small in the Earth's lower atmosphere or troposphere where our weather actually occurs. However, at higher altitudes, the atmosphere reacts strongly to changes in solar activity. The ozone layer, at an altitude of 25 kilometers (16 miles), and the ionosphere, which extends upwards in a series of layers above 60 kilometers (37 miles), are produced by solar ultraviolet light and X-rays which ionize the thin air at these altitudes. Although the visible light of the Sun is stable, large variations in X-ray and ultraviolet radiation accompany solar activity, and these variations on the Sun cause major changes in the ionosphere.

Meteorologists have observed that the ionospheric changes in turn influence the weather in the lower atmosphere. The physical mechanism by which this occurs is being studied and identified through space weather research. Research is under way about relationships between solar activity and the weather.

A study of short-term weather patterns by Walter Orr Roberts of the University Corporation for Atmospheric Research and Roger H. Olson of NOAA suggests that weather may be affected as the spiral-shaped interplanetary magnetic field rotates past the Earth.

They found that about a day after the boundary between inward-pointing and outward-pointing sectors sweeps by, there is a decrease in the number of low pressure weather systems forming in the Pacific Ocean off the western United States and Canada. Because these low pressure systems give rise to most of the storm centers that pass over North America an understanding of this effect may ultimately assist in making weather predictions.

Like other Sun-weather connections, the effect seen by Roberts and Olson is being identified using the latest technology. The Roberts-Olson effect must have an amplifier mechanism, whereby the magnetic variations trigger the changes in the weather. The nature of the amplifier mechanism, solar weather, is currently being identified using the latest satellites about how space weather affects the climate changes on the earth.

The search for Sun-weather relations is further complicated by the presence of many non-solar influences on both short- and long-term weather patterns. Volcanic eruptions can inject huge amounts of dust and ash into the atmosphere, cutting off some of the Sun's light and heat. Changes in the amount of volcanic particles in the atmosphere, as a result of volcanic eruptions,  have an affect on the amount of heat absorbed by the atmosphere. Variations in the Earth's orbital motion around the Sun from year to year also cause some changes in the weather. In looking for direct effects of solar activity on the weather other solar effects are considered.

 

Climate through the ages

Climate is the state of the weather over long periods of time, tens to thousands of years. Long-term effects of the Sun on the Earth's weather are called climate effects.

If the total output of radiant heat and light from the Sun (the solar constant) has been observed over a period time, along with X-rays, ultraviolet and other effects of solar activity. These variations affect the lower atmosphere and change the Earth's weather and climate.  This is CLIMATE CHANGE!   Because of absorption and scattering of sunlight in the Earth's atmosphere, these measurements are less reliable if made from the ground. Techniques have been developed to measure the solar constant from high tech space vehicles. There are now several instruments in orbit that are measuring the Sun's output with an accuracy that should is sufficient to detect variations capable of changing the climate.

The spacecraft measurements of the solar constant that we are accumulating now enable us to determine the day-to-day and month-to-month changes in solar output. It will eventually be possible to detail the Sun variations, not only during its 11-year sunspot cycle, but even over longer periods as well.

Observations with spacecraft are motivated in part by evidence that long-term variations in the Sun's light have actually occurred.

Observational records show an almost complete absence of sunspots between the years 1650 and 1715. During this period, named the Maunder Minimum for the English astronomer who first pointed it out, the sunspot cycle apparently ceased to exist.

Historical sources attest to the fact that the weather in Europe was particularly cold during these years, a fact which would follow logically if the light from the Sun decreased significantly during years when the sunspot count was low.


Goes 14 monitors the Sun’s hot outer atmosphere. X-ray photons are created in the million-degree plasma of the solar corona and are not visible from the ground, due to the absorption of the Earth’s atmosphere. Observations of solar X-rays aids in the early detection of solar flares, coronal mass ejections (CMEs), and other phenomena that impact earth weather. Current Space Weather Conditions 24 HR Period.

drroyspencer.com/global-warming-101.html  (Global Warming 101) The myth explained by the founder of the weather channel.



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Solar X-Ray Flux Graphs 

Top(R) Radio blackouts, Middle(S) Solar radiation storms, Bottom(G) Geomagnetic storms. [Scale 1-5] (1) Minor, (2) Moderate, (3) Strong, (4) Severe, (5) Extreme. Current Space Weather Conditions 3 day graph period, space weather overview. Space weather effects 3 day forecast. Current 3 day forecast graph prediction.

[Overview, O-Green] S1,S2-Yellow, S3-Orange, S4,S5-Red


NOAA Space Weather Scales Explanation

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