Dr.Philip Klotzbach has announced the passing of Dr. William “Bill” Gray.
Archive for the ‘Natural Variation’ Category
There have been many studies reporting climate cycles with a frequency in the 60-year range, and another one has just arrived.
Two things to consider are the general idea of the existence of such a cycle, which has often been proposed, and the prediction that we are entering (to quote the paper abstract) the ‘declining phase’ of it.
Figure 1, Met Office Hadley monthly rainfall series for England and Wales start date 1766. Winter 2015/16 was wet but ordinary. (data processing by the author, see previous articles)
Plots for all data series as PDF (2MB).
Some other parts / regions of the country do show an extreme but this adds weight to the flicker noise (or 1/f) hypothosis for weather noise.
Tags: climate change
Reblogged this from Dr Roy Spencer’s website as he no longer accepts comments. Climate consensus mythology exposed once again.
A George Mason University survey of 4,092 members of the American Meteorological Society (AMS) on climate change attitudes in the meteorological community has just been released.
It shows fairly general acceptance of the view that climate change is happening, that it is at least partly due to humans, and that we can mitigate it somewhat by our energy policies. Fully 37% of those surveyed (including me) consider themselves “expert” in climate science.
There’s been a lot of loud rhetoric flying around about the update to the RSS satellite temperature series. What it actually amounts to is a consolidation of the satellite temperature measurement effort.
The two time series are now in good agreement and exhibit a warming rate of 0.13K/decade during the 1980-2015 period.
Ian Wilson has just blogged this post, which should be a bit of a showstopper in the climate debate, but I expect it’ll be studiously ignored by mainstream climate scientists and lukewarm climate-sceptic blogs. By doing that, they’ll make themselves and their pet CO2 paradigm increasingly irrelevant to scientific progress. Key thing to note is that our work here at the talkshop and in PRP means we can now predict these quasi-cyclic natural variations. Over to Ian.
Abreu et al.  wrote:
“The parameter that best represents the role of the solar magnetic field in deflecting cosmic
rays [and hence, the overall level of solar activity] is the solar modulation potential , which can be derived from either the 10Be or the 14C production rates.”
“….spectral analysis [of the solar modulation potential over the last ~ 9400 years] identifies a number of distinct periodicities (Stuiver & Braziunas 1993), such as 88 yr (Gleissberg), 104 yr, 150 yr, 208 yr (de Vries), 506 yr, 1000 yr (Eddy), and 2200 yr (Hallstatt) [cycles]…”
The top figure in the following diagram shows the Fourier transform of the variation in the solar modulation potential time series over the last 9400 years [Abreu et al. 2012]. This figure shows that potential has distinct spectral peaks at 88 years (Gleissberg Cycle), 104 years, 133 years, 150 years, 210 years (de Vries Cycle), 232 years, 356 years and 504 years.
Below this is a second figure showing amplitude spectrum of variations in the North American temperature time series over the last ~ 7000 years. The temperature time series is obtained from tree ring data obtained from Bristle Cones on the Southern Colorado Plateau [for the details of the source of this data see: Could This Be The Climate Smoking Gun? and Salzer and Kipfmeuller (2005). The lower figure shows clear spectral peaks at approximately 88, 106, 130, 148, 209, 232, 353 and 500 years.
Tags: Global Warming
It has been claimed that the early-2000s global warming ‘slowdown’ or ‘hiatus’, characterized by a reduced rate of global surface warming, has been overstated, lacks sound scientific basis, or is unsupported by observations. The evidence presented in a new commentary in Nature Climate Change by Fyfe et al. contradicts these claims.
H/T to Josh for this story from the Calcutta Telegraph.
New Delhi, Jan. 26: India’s monsoon is in no danger of catastrophic collapse in response to global warming and air pollution, two atmospheric scientists said today, refuting earlier predictions that the monsoon could shut down within 100 years.
The scientists at Yale University in the US who used computers to model the Earth’s atmosphere, land and oceans have found that the expected changes in the monsoon will not abruptly alter their strength or their water volume.
Their results contradict earlier forecasts by scientists at the Potsdam Institute for Climate Impact Research in Germany portending frequent and severe failures and even a breakdown of the monsoon, which is critical to India’s food, water resources and economy.
Folks pop in, Michele dropped this one
Red here means dry, Italy according to this provisional data was the dryest since year 1800.
Would I be overstating to suggest there is a connection between this and northern England sploshing?
Solar forcing as an important trigger for West Greenland sea-ice variability over the last millenniumPosted: December 7, 2015 by tallbloke in Natural Variation, sea ice, Solar physics
Tags: Greenland, solar
H/T to Andrew for alerting me to this new paper published in Quaternary Science Reviews.
From the paper:
To investigate the feedback processes linking solar activity and sea-ice cover, we used the coupled climate model COSMOS, which indicates that a decrease in solar radiation results in increased sea-ice cover (Fig. 7a) and decreased sea-surface temperature (Fig. 7b). A strong negative correlation between sea-ice variability and solar forcing is observed along the eastern and southwestern coast of Greenland and in the Arctic Ocean, indicating that in this model solar variability is critical for simulating changes in local sea-ice production. A small change in incoming shortwave radiation, and associated ice-albedo effects, resulted in a large response of local ice formation, according to ‘bottom-up’ (solar heating of the sea surface) mechanisms (Gray et al., 2010; Hunke et al., 2010).
This article is part of preparing the way for later revelations about instrumentation defects.
Figure 1 (upper), Figure 2 (lower) computed mean insolation for horizontal surface at this exact location and weather parameters, no cloud.
Figure 1 (upper), Experimental work showing nearly daily temperature variation from expected, specifically designed to exclude diurnal but include detail variation at the fastest scale feasible. Time graticule at 10 days, data points at 12 hours. Surprisingly the July 1st hot period has vanished. Plots of other sites show a similar effect. The most frequent warm and cool periods of weather are brief and readily seen.
This computation will produce different values from the mean values computed from thermometer minimum and maximum data because data shape at other times is taken into account, min/max does not. The filter used is also windowed, leakage is negligible.
Oh my, The Sun, still is.
The Sunspots 2.0? Irrelevant. The Sun, still is.
After being asked by 5 independent people about the new sunspot number reconstruction and that it doesn’t show that the sun should have contributed any warming to the 20th century, I decided to write about it here. I have one word to describe it – irrelevant. It is also a good opportunity to write about new results (well, one that saw the light of day a few months ago) showing again that the sun has a large effect on climate. Yet, the world will still continue to ignore it. Am I surprised? No I’m not.
The day a Mexican farmer saw the beginnings of one of the seven natural wonders of the world – at least
according to CNN…
On February 20, 1943, Dionisio Pulido was working in his cornfield just outside the Tarascan Indian village of Paricutin, Mexico. He and his family had spent the day getting ready for the spring sowing by clearing the field of shrubbery, putting it in piles and burning it. At about four in the afternoon, Pulido left his wife and moved to a different field so that he could set fire to a new pile. When he arrived he noticed something strange: on top of a small hill in the field a huge crack, over six feet wide and 150 feet (47m) long, had appeared in the earth. At first Pulido wasn’t concerned, the crack only looked like it was about a foot deep. As he was lighting the pile of branches, however, the sound of thunder rumbled across the field and the ground began to shake.
Tags: Paul Vaughan
Paul Vaughan has produced a six page .pdf document crammed with the fruits of his research into the ways in which solar variation affects Earth’s climate. Several of the observations and concepts coincide with the work we have been doing here at the talkshop over the last six years to unravel the mysteries of solar system dynamics and their effect on Terrestrial variation. Paul has applied his stats and visualisation skills and thorough approach to referencing, including direct links to data. This has resulted in a landmark document which readers will find both useful and inspiring. It demonstrates the progress that has been made in solar-terrestrial theory, (with hints about the underlying planetary solar relations too).
Tags: orbital resonance, Perigean tides
Relevant to current discussions on the talkshop concerning changes in Earth’s length of day (LOD) and the effect of planetary orbital resonances on the Moon’s orbital parameters and Earth climatic variation; this is a repost from Ian Wilson’s excellent Astro-Climate-Connection website. Ian very generously opens with a hat tip to this blog, (at which he is one of the ‘collaborators’ he mentions).
Connecting the Planetary Periodicities to Changes in the Earth’s LOD
Monday, October 14, 2013 : Ian Wilson PhD
[(*) Some of the findings in this blog post concerning the connection between the Earth’s rotation rate and the planetary configurations have also been independently discovered by Rog “Tallbloke” Tattersall and his collaborators]
A. The Connection Between Extreme Pergiean Spring Tides and Long-term Changes in the Earth’s Rotation Rate as Measured by the Rate-of-Change of its Length-of-Day (LOD). (*)
If you plot the rate of change of the Earth’s Length of Day (LOD) [with the short-term atmospheric component removed] against time [starting in 1962] you find that there is a ~ 6 year periodicity that is phase-locked with the 6 year period that it takes the lunar line-of-nodes to re-align with the lunar line-of-apse [see the first note directly below and reference  for a description of the method used to determine the time rate of change of LOD].
NB: The pro-grade precession of the lunar line-of-apse once around the Earth with respect to the stars takes 8.8504 Julian years (J2000) while the retrograde precession of the lunar
line-of-apse line-of-nodes once around the Earth with respect to the stars takes 18.6000 Julian years (J2000). Hence, the lunar line-of-apse and the ascending node of the lunar line-of-nodes will realign once every:
(18.6000 x 8.8504) / (18.6000 + 8.8504) = 5.9969 Julian years
Tags: Antarctic, climate change, Greenland, ice cores
Science Daily reports on recent research by Oregon State University (H/T The Hockeyshtick):
A new study using evidence from a highly detailed ice core from West Antarctica shows a consistent link between abrupt temperature changes on Greenland and Antarctica during the last ice age, giving scientists a clearer picture of the link between climate in the northern and southern hemispheres.
Greenland climate during the last ice age was very unstable, the researchers say, characterized by a number of large, abrupt changes in mean annual temperature that each occurred within several decades. These so-called “Dansgaard-Oeschger events” took place every few thousand years during the last ice age. Temperature changes in Antarctica showed an opposite pattern, with Antarctica cooling when Greenland was warm, and vice versa.
In this study funded by the National Science Foundation and published this week in the journal Nature, the researchers discovered that the abrupt climates changes show up first in Greenland, with the response to the Antarctic climate delayed by about 200 years. The researchers documented 18 abrupt climate events during the past 68,000 years.
Tags: China, Obama
Guest Post from Ed Hoskins:
In November 2014, to much fanfare, President Obama concluded an agreement with China on Climate. This was as a precursor to the major Paris climate conference in December 2015, where it is anticipated that a definitive and binding Climate agreement should be reached. These notes follow through that 2014 agreement as far as it concerns future likely CO2 emissions up until the year 2030.
Essentially the agreement said that whilst Western Nations would be expected to reduce CO2 emissions substantially, China, India and the rest of the developing world would continue its CO2 emissions growth until at least 2030 to ensure that continuing enhancement of the living standards of their populations, and that only then China would limit further growth of its CO2 emissions.
Paul Vaughan writes in suggestions:
It’s the wind.
Rial (2012) drew my attention to a fundamental correction that’s underway in oceanography (more notes forthcoming on this later) ….
Lozier, Susan (2010). Deconstructing the conveyor belt. Science 328, 1507-1511.
Though appealing in its simplicity, the ocean conveyor-belt paradigm has lost luster over the years […] the ocean’s eddy field, unaccounted for just decades ago […] figures prominently in the dismantling of the conveyor-belt paradigm. Another player in this dismantling is the ocean’s wind field. The traditional assignation of surface ocean gyres to wind-forcing and overturning to buoyancy forcing has ignored the vital impact of winds on overturning pathways and mechanics. […] the conveyor-belt model no longer serves the community well […] because it ignores crucial structure and mechanics of the ocean’s intricate global overturning.
[…] wind forcing, rather than buoyancy forcing, can play a dominant role in changing the transport of the overturning […]
Tags: CMIP5, models, Radiosonde, UAH
It was the scientific skeptics who bucked the ‘consensus’ and said the Earth was round.
By Richard McNider And John Christy Updated Feb. 19, 2014
In a Feb. 16 speech in Indonesia, Secretary of State John Kerry assailed climate-change skeptics as members of the “Flat Earth Society” for doubting the reality of catastrophic climate change. He said, “We should not allow a tiny minority of shoddy scientists” and “extreme ideologues to compete with scientific facts.” But who are the Flat Earthers, and who is ignoring the scientific facts?
In ancient times, the notion of a flat Earth was the scientific consensus, and it was only a minority who dared question this belief. We are among today’s scientists who are skeptical about the so-called consensus on climate change. Does that make us modern-day Flat Earthers, as Mr. Kerry suggests, or are we among those who defy the prevailing wisdom to declare that the world is round?
Tags: bbc bias, co2, Global Warming, slowdown, The Guardian newspaper
The Guardian newspaper finally facing up to climate reality? Well, after a fashion. Their global warming can may have been kicked down the road for a while, that’s all.
The idea that natural variation could make temperatures go up as well as down is still not for discussion in their biased climate world.
H/T Lord Beaverbrook.
Guardian report: Manmade global warming over the past decade has probably been partly offset by the cooling effect of natural variability in the Earth’s climate system, a team of climate researchers have concluded.
The finding could help explain the slowdown in temperature rises this century that climate sceptics have seized on as evidence climate change has stopped, even though 14 of the 15 hottest years on record have happened since 2000.
The authors of the new paper describe the slowdown, sometimes called a global warming hiatus or pause, as a “false pause”. They warn that the natural cycles in the Pacific and Atlantic that they found are currently having an overall cooling effect on temperatures will reverse in the coming decades – at which point warming will accelerate again.