Cold and heat of archaic earth

1998/02/01 Elhuyar Zientzia Iturria: Elhuyar aldizkaria

• Ingurumena

In the last 150 years the Arctic has doubled than the rest of the planet. In addition, the biggest warming has occurred in the last 60 years. This temperature change seems to be due to natural causes.

These are the conclusions reached by a group of Colorado researchers after measuring the thickness of tree facilities, analyzing the degree of melting ice and its isotopic composition, and observing the characteristics of sea lakes and sediments.

Since 1840 the average temperature that the Arctic has suffered at present has been 1.5 °C, while throughout the planet has been 0.6 °C.

This study has discovered the natural and violent oscillations of temperatures recorded in the last 400 years.

XVII. the nineteenth century seems to be cold, the eighteenth more temperate; the beginning of the twentieth century was very cold and since then the temperature has been increasing gradually, except the cut of 1960.

XIX. The Milankovitch effect has been mentioned to explain these upsurges of the 20th century. Due to some "tremors" of the Earth, this effect explains that the heat coming from the Sun has suffered a series of declines.

This, however, does not rule out the hypothesis that has been assumed in recent months, but it is believed that the increases that have occurred since 1920 have a remarkable influence on humans.