Sentences with phrase «varies over solar cycles»

And it is indisputable it varies over solar cycles and longer periods.

Not exact matches

According to http://folk.uio.no/jegill/papers/2002GL015646.pdf «A physical mechanism connecting solar irradiance and low clouds might contain the following components: (1) Over the solar cycle the flux of ultraviolet (UV) radiation varies by several %, and even more so in the short wavelength component of the UV.

He also notes that while the total solar irradiance (TSI) only varies by about.1 % over a solar cycle, the solar UV varies by about 10 % and that secondary effects on cloud formation may vary up to 30 % over solar cycles.

They also fail to mention that although the incoming solar radiation only varies by a couple of Watts per square metre over a solar cycle the apparent smallness of the variation is a result of the small area subdivision and not any indication of a small total energy variation when one takes into account the number of square metres on the Earth's surface.

The density of the upper atmosphere at any given altitude varies with the amount of solar radiation it receives, and the amount of solar radiation in turn varies either day - to - day depending on solar activity or over the 11 - year solar cycle.

Solar output varies both over the long - term (centuries), which will impact long - term climate trends, and over the shorter - term (the 11 year solar cySolar output varies both over the long - term (centuries), which will impact long - term climate trends, and over the shorter - term (the 11 year solar cysolar cycle).

And this theory is based on Cosmic Ray levels reaching the Earth varying over the 11 year Solar Cycle.

However, although the latter varies significantly from cycle to cycle (as reflected in different cycle magnitudes varying by a factor of 2), the tilt angle exhibits roughly the same variations over all cycles, in accord with the idea of a regular cyclic behaviour (Suess et al. 1993; Cliver & Ling 2001; Alanko - Huotari et al. 2007), depending only on the solar cycle phase and not on its strength.

Since we have not observed the latter for more than a couple of cycles, we don't know how it varies over the longer term, except that the solar cycles vary, so we conclude that what controls the cycles will also vary.

Hi Geoff, It's a pity your graph doesn't go further into the past rather than the future, because I think you'll find the cycle in Earth's velocity varies in a way which roughly matches the solar cycle length over longer periods rather than a 10 year period.

The level of solar activity varies during each cycle and over a run of cycles.

EUV values vary by 30 - 100 % across the range over the solar cycle, and have the most potential to modulate atmospheric chemistry, size and temperature.

The 11 ‐ year mean minimizes the effect of solar variability — the brightness of the sun varies by a measurable amount over the sunspot cycle, which is typically of 10 ‐ 12 year duration.

Total solar irradiance over the past three solar cycles, since 1975, varying between 1365 and 1367 W / m2.