Sentences with phrase «number of sunspots»

The extraordinary cold spell was probably strengthened and lengthened by the resulting increase in sea ice at high latitudes, as well as an unusually low number of sunspots in the middle of the 7th century.

While solar output typically goes through 11 - year cycles with high numbers of sunspots seen at their peak, we are currently approaching the peak of «Cycle - 24» with numbers running at less than half of those observed during other 20th century peaks.

The forecast is for cycle 25 to be smaller in number than cycle 24, shown to the right of this photo, which is the smallest number of sunspots since cycle 14 that reached its peak around 1912.

Therefore, the overall irradiance increases in correspondence with higher numbers of sunspots.

A: The sun is now just about at the peak of its 11 - year solar cycle, meaning that there are a significant number of sunspots visible.

There was an even lower number of sunspots during the Maunder Minimum between 1645 and 1710 coincident with an even colder spell, known as the Little Ice Age.

Using the same method that I had used earlier for the same years on both data sets, I compared the total numbers of sunspots in post-1975 years to the 200 years pre-1975, and discovered a surprising result, given all the hype: the GSN reconstruction makes no discernable difference over the SIDC number post-1975 as pertaining to the solar cause of global warming.

Correlation has been discovered between number of sunspots and surface temperature of Earth.

Influenced by the large number of sunspots in November of 2011, this work is a collection of «sun spots» or blemishes digitally removed from photographic portraits.

«Going back to 1755, there have been only a few solar cycles in the previous 23 that have had a lower number of sunspots during its maximum phase.»

These deltas «comprise about 5 percent of the total number of sunspots, but contribute almost 100 percent of the trouble,» he says.

Each of these periods is characterized by low numbers of sunspots, cooler global climates, and changes in the rate of production of 14C and 10Be in the upper atmosphere.

The sun goes through an 11 - year solar cycle during which its luminosity varies according to the number of sunspots appearing on its face.

The Sun's activity — including changes in the number of sunspots, levels of radiation and ejection of material - varies on an eleven - year cycle, driven by changes in its magnetic field.

Dikpati's simulations show that these unusually long currents affect the magnetic fields near the surface, which indirectly determine the number of sunspots and the strength of solar flares.

Analysis of multifractals, conducted by the Institute of Nuclear Physics of the Polish Academy of Sciences in Kraków, Poland, suggest the existence of an unknown mechanism on the Sun, influenced by changes in the number of sunspots.

At the Institute of Nuclear Physics of the Polish Academy of Sciences in Kraków, Poland, researchers have been conducting multifractal analysis into the changes in the numbers of sunspots.

Last year the number of sunspots dropped to a level not seen since the beginning of the 20th century.

But what mechanism is responsible for the multifractal correlations in fluctuations of the number of sunspots, and particularly for their dual nature?»

Using this approach, looking at some of the graphs, for example those regarding the number of sunspots on the face of the Sun, we come to some very interesting conclusions,» says Prof. Stanislaw Drozdz (INP PAS, Krakow University of Technology).

The most curious observation came to light when the INP PAS physicists started to analyze the numbers of sunspots.

Scientists have long noted anecdotal links between low solar activity and cold European winters: Part of the Little Ice Age, which gripped the region between about 1550 and 1850, coincided with a record low number of sunspots, which are one measure of solar activity.

Astronomers have been able to forecast trends in the number of sunspots since the 1800s, but predicting individual spots requires satellites that can probe the turbulent plasma flows deep beneath the sun's surface.

During this time, the number of sunspots on its surface increases to a point called a solar maximum, in which the star's magnetic field grows strongest, and then gradually drops, with a corresponding weakening of its magnetism.

The Sun behaves in a similar way, with the number of sunspots increasing and decreasing every 11 years.

The increased number of sunspots and solar storms during solar maximum takes place approximately every 11 years.

11 Duration, in years, of a typical solar cycle, natural variations in the number of sunspots and flares that affect solar irradiance levels on Earth.

So simply counting the number of sunspots is insufficient to understand the solar activity conditions.

This «solar cycle» is often associated with the number of sunspots, but there are other types of solar activity as well.

A lower number of sunspots could mean space weather will be relatively mild in the coming years.

They are a common measure of solar activity — the higher the number of sunspots, the higher the probability of a major storm that could wreak havoc on Earth (see Space storm alert: 90 seconds from catastrophe).

It's the sun «Over the past few hundred years, there has been a steady increase in the numbers of sunspots, at the time when the Earth has been getting warmer.

The number of sunspots varies as solar magnetic activity does — the change in this number, from a minimum of none to a maximum of roughly 250 sunspots or clusters of sunspots and then back to a minimum, is known as the solar cycle, and averages about 11 years long.

As the sunspot cycle progresses, the number of sunspots increases and they move closer to the equator of the Sun, a phenomenon described by Spörer's law.

The number of sunspots visible on the Sun is not constant, but varies over a 10 - 12 year cycle known as the Solar cycle.

Why are you dividing the number of sunspots?

The solar cycle that began in 2008 will reach maximum in 2013, but that maximum is predicted to have only one - half of the number of sunspots seen in the previous cycle.

Chief among these timescales is the 11 - year solar cycle, defined by the waxing and waning of solar activity as seen in the number of sunspots.

«Going back to 1755, there have been only a few solar cycles in the previous 23 that have had a lower number of sunspots during its maximum phase,» according to Vencore.