Russian Scientists say period of global cooling ahead due to changes in the sun

In reply to:
Elliot Kennel says:
April 29, 2013 at 7:50 am
Is there a publication that makes this prediction, or is this just an opinion expressed by the scientist?
William,
There are hundreds of individual published papers that layout the theory (there is cyclic climate change in the paleo record and each and every time the climate changes there is an accompanying change to the solar magnetic cycle) and the mechanisms (by which solar magnetic cycle changes modulate planetary climate), however, there is a very vocal group that are stating catastrophic warming at a volume and consistency that drowns out or intimidates anyone connecting the dots to predict global cooling.
The paleoclimatic record shows cycles of warming followed by cooling Dansgaard-Oeschger cycles and the more sever Heinrich events. The D-O cycles have a periodicity of 1450 years plus or minus a discrete change of 500 years (i.e. 950 years, 1450 years, and 1950 years).
Greenland ice temperature, last 11,000 years determined from ice core analysis, Richard Alley’s paper.
The late Gerald Bond has able to track 23 of the D-O cycles/Heinrich events through the current interglacial and into the last glacial phase.
http://www.climate4you.com/images/GISP2%20TemperatureSince10700%20BP%20with%20CO2%20from%20EPICA%20DomeC.gif
http://rivernet.ncsu.edu/courselocker/PaleoClimate/Bond%20et%20al.,%201997%20Millenial%20Scale%20Holocene%20Change.pdf
A Pervasive Millennial-Scale Cycle in North Atlantic Holocene and Glacial Climates
http://rivernet.ncsu.edu/courselocker/PaleoClimate/Bond%20et%20al%201999%20%20N.%20Atlantic%201-2.PDF
http://www.climate4you.com/
William: This paper provides the observational evidence to support the assertion that the last Heinrich event 12,900 years before present at which time the planet went from interglacial warm to glacial cold when insolation at latitude N65 in June and July was at maximum with 90% of the cooling occurring in less than a decade correlates with an unknown massive change in C14 which correlates with a solar magnetic cycle change.
Reduced solar activity as a trigger for the start of the Younger Dryas?
http://www.falw.vu/~renh/pdf/Renssen-etal-QI-2000.pdf
William: The following is more information concerning how unusual the 20th century period of high solar activity was and what to possibly expect if the sun moves abruptly into a deep minimum.
http://arxiv.org/abs/0706.0385
Grand minima and maxima of solar activity: New observational constraints I.G. Usoskin, S.K. Solanki, and G.A. Kovaltsov
…We present an updated reconstruction of sunspot number over multiple millennia, from 14C data by means of a physics-based model, using an updated model of the evolution of the solar open magnetic flux. A list of grand minima and maxima of solar activity is presented for the Holocene (since 9500 BC) and the statistics of both the length of individual events as well as the waiting time between them are analyzed…. …Solar activity on multi-millenial time scales has been recently reconstructed using a physics-based model from measurements of 14C in tree rings (see full details in Solanki et al. 2004, Usoskin et al. 2006a). The validity of the model results for the last centennia has been proven by independent data on measurements of 44Ti in stony meteorites (Usoskin et al. 2006b). The reconstruction depends on the knowledge of temporal changes of the geomagnetic dipole field, which must be estimated independently by paleomagnetic methods. Here we compare two solar activity reconstructions, which … …the more recent work of Korte & Constable (2005) may underestimate it. Thus we consider both models as they bound a realistic case. We note that the Yang et al. (2000) data run more than 4000 years longer and give a more conservative estimate of the grand maxima. See figure 3 in this paper. It shows that solar activity in 20th century particularly in the last half of the 20th century was the highest in 12,000 years and more importantly the duration of the high period was the longest in 12,000 years.
http://cc.oulu.fi/~usoskin/personal/nature02995.pdf
Unusual activity of the Sun during recent decades compared to the previous 11,000 years by S. K. Solanki, I. G. Usoskin, B. Kromer, M. Schussler & J. Beer
Here we report a reconstruction of the sunspot number covering the past 11,400 years, based on dendrochronologically dated radiocarbon concentrations. We combine physics-based models for each of the processes connecting the radiocarbon concentration with sunspot number. According to our reconstruction, the level of solar activity during the past 70 years is exceptional, and the previous period of equally high activity occurred more than 8,000 years ago. We find that during the past 11,400 years the Sun spent only of the order of 10% of the time at a similarly high level of magnetic activity and almost all of the earlier high-activity periods were shorter than the present episode. Although the rarity of the current episode of high average sunspot numbers may indicate that the Sun has contributed to the unusual climate change during the twentieth century, we point out that solar variability is unlikely to have been the dominant cause of the strong warming during the past three decades. (William: The authors considered total solar irradiation TSI which is not the major mechanism by which the sun modulate planetary temperature. The mechanism is modulation of low level and high level clouds. During both Dansgaard-Oeschger cycle and the Heinrich events the mechanism is inhibited as the solar magnetic cycle is interrupted. (i.e. Galactic cosmic rays increase however there is not an increase in planetary clouds.))
William: This paper notes that roughly 10 years ago the magnetic field strength on newly formed sunspots started to decay linearly. Based on Eugene Parker’s analysis the magnetic ropes – the magnetic ropes are hypothesized to form at the solar tachocline and then rise up through the convection zone to form sunspots on the surface of the sun – require a minimum field strength to avoid being torn apart in by turbulence in the convection zone. The authors of this paper note there are no sunspots on the surface of the sun that have a magnetic field strength that is less than 1500 gauss. It the trend continues the sun will have no sunspots in around 2017.
http://arxiv.org/abs/1009.0784v1
Long-term Evolution of Sunspot Magnetic Fields
Independent of the normal solar cycle, a decrease in the sunspot magnetic field
strength has been observed using the Zeeman-split 1564.8nm Fe I spectral line at the
NSO Kitt Peak McMath-Pierce telescope. … …This trend was seen to continue in observations of the first sunspots of the new solar Cycle 24, and extrapolating a linear fit to this trend would lead to only half the number of spots in Cycle 24 compared to Cycle 23, and imply virtually no sunspots in Cycle 25.
We reported in Penn & Livingston (2006) that a time series of this magnetic field data showed a decrease in the umbral magnetic field strength which was independent of the normal sunspot cycle. Also, the measurements revealed a threshold magnetic field strength of about 1500 Gauss, below which no dark pores formed. A linear extrapolation of the magnetic field trend suggested that the mean field strength would reach this threshold 1500 Gauss value in the year 2017.
William: This paper explains two of the mechanisms ion mediated cloud nucleation (changes to the strength and angle of the solar heliosphere modulate GCR. GCR strike the earth’s atmosphere and create ions) and electroscavenging (solar wind creates a space charge differential in the ionosphere which removes cloud forming ions).
http://www.utdallas.edu/physics/pdf/Atmos_060302.pdf
Atmospheric Ionization and Clouds as Links Between Solar Activity
and Climate by Brian A. Tinsley and Fangqun Yu
The ionization at cloud level that determines the rate of electroscavenging and IMN is influenced by space particle fluxes as illustrated in Figure 3.1. These inputs are in the form of GCR; MeV electrons precipitating from the radiation belts with associated X-ray bremsstrahlung; the bulk solar wind plasma with its embedded magnetic fields that determines the horizontal distribution of potential across the polar cap ionospheres; and occasional energetic solar proton events. The latter occur too infrequently to have a significant effect on climate, and are not illustrated. The GCR flux is responsible for almost all of the production of ionization below 15 km altitude, that determines the conductivity in that region. The MeV electrons and their associated X-rays produce ionization in the stratosphere, and affect the conductivity there.
http://www.esd.ornl.gov/projects/qen/transit.html
Sudden climate transitions during the Quaternary
According to the marine records, the Eemian interglacial ended with a rapid cooling event about 110,000 years ago (e.g., Imbrie et al., 1984; Martinson et al., 1987), which also shows up in ice cores and pollen records from across Eurasia. From a relatively high resolution core in the North Atlantic. Adkins et al. (1997) suggested that the final cooling event took less than 400 years, and it might have been much more rapid. … …The event at 8200 ka is the most striking sudden cooling event during the Holocene, giving widespread cool, dry conditions lasting perhaps 200 years before a rapid return to climates warmer and generally moister than the present. This event is clearly detectable in the Greenland ice cores, where the cooling seems to have been about half-way as severe as the Younger Dryas-to-Holocene difference (Alley et al., 1997; Mayewski et al., 1997). No detailed assessment of the speed of change involved seems to have been made within the literature (though it should be possible to make such assessments from the ice core record), but the short duration of these events at least suggests changes that took only a few decades or less to occur.