Geoscientists reconstruct ‘eye-opening’ 900-year Northeast climate record

Posted: January 13, 2019 by oldbrew in climate, Cycles, innovation, research, Temperature
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Credit: planetsave.com


This supports the idea that temperature cycles in the region of 60 years are very likely a common feature of Earth’s climate.

Deploying a new technique for the first time in the region, geoscientists at the University of Massachusetts Amherst have reconstructed the longest and highest-resolution climate record for the Northeastern United States, which reveals previously undetected past temperature cycles and extends the record 900 years into the past, well beyond the previous early date of 1850, reports Phys.org.

First author Daniel Miller, with Helen Habicht and Benjamin Keisling, conducted this study as part of their doctoral programs with advisors geosciences professors Raymond Bradley and Isla Castañeda.

As Miller explains, they used a relatively new quantitative method based on the presence of chemical compounds known as branched glycerol dialkyl glycerol tetra ethers (branched GDGTs) found in lakes, soils, rivers and peat bogs around the world. The compounds can provide an independent terrestrial paleo-thermometer that accurately assesses past temperature variability.

Miller says, “This is the first effort using these compounds to reconstruct temperature in the Northeast, and the first one at this resolution.” He and colleagues were able to collect a total of 136 samples spanning the 900-year time span, many more than would be available with more traditional methods and from other locations that typically yield just one sample per 30-100 years.

In their results, Miller says, “We see essentially cooling throughout most of the record until the 1900s, which matches other paleo-records for North America. We see the Medieval Warm Period in the early part and the Little Ice Age in the 1800s.”

An unexpected observation was 10, 50-to-60-year temperature cycles not seen before in records from Northeast U.S., he adds, “a new finding and surprising. We’re trying to figure out what causes that. It may be caused by changes in the North Atlantic Oscillation or some other atmospheric patterns. We’ll be looking further into it.”

Continued here.

Related: Anthropogenic CO2 warming challenged by 60-year cycle

The Sixty-Year Climate Cycle

Comments
  1. Jamie Spry says:

    “recaptured sediment traps from an unusually deep lake in central Maine, where they collected 136 sediment samples spanning the 900-year time span to reconstruct the longest and highest-resolution climate record for the Northeastern United States to date.”

    Cool!

  2. Remarkable how vxx they did this. Perhaps, this can help create a better understanding of climate change.

  3. oldbrew says:

    From the Sixty Year Climate Cycle link above:

    Nicola Scafetta has identified the change in the location of the center of mass of the solar system (CMSS) as a possible mechanism driving the 60-year cycle. (Scafetta, N., “Empirical evidence for a celestial origin of the climate oscillations and its implications”, Journal of Atmospheric and Solar-Terrestrial Physics (2010), doi:10.1016/j.jastp.2010.04.015 [http://arxiv.org/PS_cache/arxiv/pdf/1005/1005.4639v1.pdf])
    . . .
    The following figure shows the speed of the Sun relative to the CMSS showing “20 and 60 year oscillations”. (From the Scafetta paper referenced above.) It shows a 60-year cycle with peaks similar to the global average temperatures shown at the start of this document – around 1880, 1940 and 2000.


    – – –
    This is also one third of the 179 year solar motion cycle, driven by Jupiter, Saturn and to a smaller extent, Neptune.

  4. Geoff Sharp says:

    Did anyone else notice in the moneyshot graph that the results of this study exactly matched the results of the East African lake (Russell 2018)?

  5. stpaulchuck says:

    good old 1850, the foundational year for warmists and their half truths.

    “Since the beginning of the Industrial Age…” You see that all over the warmist propaganda because it is also about the end of the Little Ice Age. So let me see… ice age cold, not ice age warmer. I’m so glad I’m an engineer so I can figure this complicated stuff out.

    We’re still about a degree colder than the Middle Ages Warm Period and definitely colder than the Roman Warm period where they grew grapes in northern Britain, a thing we still cannot do with any success today. But the Earth is on fire and we’re all going to have to move to Siberia to keep from dying. Or something. *shakes head in disgust*

  6. oldbrew says:

    Ask the warmists when they’re planning to move to Alaska to escape the heat 🤔

  7. DB says:

    The Miller reconstruction of climate data for a site in Maine covering the last 900 years shows:
    – A declining temperature trend over the period with the peak in 1350 and the coldest about 1850.
    – Post-2000 temps are almost as low as the coldest.
    – Fire frequency was not correlated with temperature. The first 200 years (1100-1300) were dominated by warm and dry conditions but no fire events were found.

  8. oldbrew says:

    Kepler knew a thing or two…

    In a series every fourth conjunction (of Jupiter and Saturn) returns after some 60 years in the vicinity of the first. These returns are observed to be shifted by some 7–8°.
    https://en.m.wikipedia.org/wiki/Great_conjunction

    Kepler’s trigon, a diagram of great conjunctions (from the book De Stella Nova (1606) by Johannes Kepler)

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