Dueling Studies On Solar Activity And Climate

Here’s the first

(The Hockey Schtick) A paper published in Earth and Planetary Science Letters finds solar activity was strongly correlated to climate change over the past 200,000 years. The paper reconstructs solar geomagnetic field strength using the 10Be isotope proxy of cosmic rays, which is inversely related to solar activity. The reconstruction in Figure 2 shows solar activity at the end of the record [“near present day”] was at some of the highest levels of the past 200,000 years, and solar geomagnetic field intensity approximately 3 times higher than during the ice age ~180,000 years ago.

Figure 4 below shows the strong correlation between solar activity [grey and black] and the climate change proxy [d18O in red] over the past 200,000 years. According to the author, “The marine δ18O [temperature proxy] record and solar modulation are strongly correlated at the 100,000 year timescale. It is proposed that variations in solar activity control the 100,000 year glacial–interglacial cycles.”

Obviously, Warmists do not like the notion that the nuclear furnace in the sky is mostly responsible, or responsible at all, for changes in climate, so now we get this study which Warmists in the media are pimping breathlessly

(International Business Times) Variations in heat from the sun have not strongly influenced climate change, according to a new study conducted by scientists at the University of Edinburgh, which instead points the finger at volcanic activity and greenhouse gases for the planet’s ever-changing climate patterns.

The findings of the study, published in Nature GeoScience on Sunday, have overturned a widely-held scientific concept that long-lasting periods of warm and cold weather in the past might have been caused by periodic fluctuations in solar activity. The researchers examined causes of climate change in Earth’s northern hemisphere over the past 1,000 years and found that until the year 1800, the key driver of periodic changes in climate was volcanic activity.

In fact, the paper itself notes, while positioning itself as the Ultimate Proof!!!!!!!

Research examining the causes of climate change in the northern hemisphere over the past 1000 years has shown that until the year 1800, the key driver of periodic changes in climate was volcanic eruptions.

These tend to prevent sunlight reaching the Earth, causing cool, drier weather. Since 1900, greenhouse gases have been the primary cause of climate change.

A couple points: if volcanoes were the major driver over the past 1000 years, why couldn’t the same natural process be in charge now? Second, what about 1800-1900? What drove the climate to switch from the Little Ice Age to the Modern Warm Period? Third, this is all about dismissing the effects of the Sun, as Warmists have been trying to do for quite some time. Fourth, this paper seems more about Blaming Man for the Modern Warm Period, but forgets that if GHGs are the primary cause of the current warm period, why has there been no warming in 17 years?

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4 Responses to “Dueling Studies On Solar Activity And Climate”

  1. […] Dueling Studies On Solar Activity And Climate » Pirate's Cove Tags: Business, Earth, figure, international, Major, modern, northern, nuclear, Science, university, year […]

  2. Jeffery says:

    The sunspot/solar magnetic field paper cited in the Hockey Schtick is from 2002. The magnetic field of the sun is thought to be inversely proportional to the cosmic rays reaching Earth (as estimated by beryllium-10 deposition). There is no evidence that either magnetic field fluxes or cosmic rays significantly influence the climate of the Earth. The sun undergoes 11 yr cycles where the Total Solar Irradiance (TSI), the actual heat reaching the Earth from the sun, varies by some 0.1% from peak to trough, and this is a reason that climate scientists conclude that variability of the sun contributes no more than 11% to the current rapid warming. http://en.wikipedia.org/wiki/File:Solar-cycle-data.png

    The second paper (2013) concluded that some climate changes in the Northern Hemisphere over the last 1000 years were likely due to volcanic activity (all natural!) and not changes in TSI. Volcanoes eject many tons of ash and sulfates into the atmospheric blocking some incoming solar radiation – hence leading to cooling. Other scientific papers have reached the same conclusion. As the ash and sulfates leave the atmosphere, the solar radiation reaching the Earth would increase.

    Finally, the Pirate typed: “…but forgets that if GHGs are the primary cause of the current warm period, why has there been no warming in 17 years?” This is false. The Earth continues to warm from the enhanced greenhouse effect from human-generated CO2 added to the atmosphere.

  3. Jeffery says:

    forgot to add…

    Pirate typed: “…so now we get this study which Warmists in the media are pimping breathlessly”.

    Were you “pimping breathlessly” the 2002 paper? Or do only those with whom you disagree commit “breathless pimping”? How many major media pimped this article?

    And what are the nefarious motives for climate scientists replacing one form of natural change (TSI) with another (volcanoes)? In science, you should follow the data. You’re sounding paranoid.

  4. jl says:

    “The earth continues to warm..” No, it doesn’t. But if so, there’s still no evidence it’s CO2 causing it. And, as asked hundreds of times, if so, what percentage of “warming” is the CO2 causing? If you don’t know that, which you don’t, you have nothing.

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