Scientists: The World Has Been Getting Colder Over The Last 2,000 Years

Yes, the world has been getting colder and not hotter over the last 2,000 years. Indeed, it was much warmer in the Roman era and Middle Ages than scientists have previously recognized.

This came out earlier this week. However, I could only find the article in the Mail, and many people seem to believe that if it is in the Mail, it must be wrong. So, here is the introduction to the scientific paper, “Orbital forcing of tree-ring data”, from the prestigious peer-reviewed journal Nature:

Solar insolation changes, resulting from long-term oscillations of orbital configurations, are an important driver of Holocene climate. The forcing is substantial over the past 2,000 years, up to four times as large as the 1.6 W m−2 net anthropogenic forcing since 1750, but the trend varies considerably over time, space and with season. Using numerous high-latitude proxy records, slow orbital changes have recently been shown to gradually force boreal summer temperature cooling over the common era. Here, we present new evidence based on maximum latewood density data from northern Scandinavia, indicating that this cooling trend was stronger (−0.31 °C per 1,000 years, ±0.03 °C) than previously reported, and demonstrate that this signature is missing in published tree-ring proxy records. The long-term trend now revealed in maximum latewood density data is in line with coupled general circulation models indicating albedo-driven feedback mechanisms and substantial summer cooling over the past two millennia in northern boreal and Arctic latitudes. These findings, together with the missing orbital signature in published dendrochronological records, suggest that large-scale near-surface air-temperature reconstructions relying on tree-ring data may underestimate pre-instrumental temperatures including warmth during Medieval and Roman times.

In plain English, this says tree-ring data from Scandinavia demonstrates that summer temperatures have become markedly cooler over the last 2,000 years, and this trend outweighs any anthropological causes for climate change that may have been occurring since 1750 by a factor of 4 to 1. The explanation for this cooling is that over time the Earth varies slightly in distance from the Sun. Since we are not as close to it as we once were, the climate is now cooler. While the cooling is sporadic, a definite trend line can be established. As there was incomplete data in the past, previous research using tree rings greatly underestimated the extent of warming in Medieval and Roman times.

While it is a difficult article, it nevertheless is worth reading in full. These researchers do not negate the possibility of anthropological forces influencing the climate, but they state fairly emphatically that the prime force governing the Earth’s climate is the Sun, and that this truth has been neglected by many computer simulations and climate reconstructions.

It makes sense that the distance and intensity of the Sun would greatly outweigh all other factors when it comes to the temperature of the Earth. Of course, when politics and science collide, sense is often the last thing you will find.

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One Response to Scientists: The World Has Been Getting Colder Over The Last 2,000 Years

  1. Francesca jeannie says:

    Can you do an article on you tube about the oceans are evaporating not as strong and healthy looking waves since 50 years ago

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