The Greenland Climate Clock show Greenland climate shifts from 2000 B.C to 2000 A.D. Lines represents the beginning of a new warm climate period. The Greenland Climate Clock has a spectrum of solar-lunar periods. A 2046-year period is identified in a time-scale of 4000 years, and a 420-year period in a time-scale of 1000 years.
Greenland temperature from 2000 B.C to 2000 A.D
Figure 2. Greenland temperature (GISP2) from 2000 B.C to 2000 A.D
Figure 2 show the Greenland temperature from 2000 B.C to 2000 A.D. The temperature variability looks random from 2000 B.C to 1000 A.D. From 1000 A.D the temperature is reduced to a minimum at 1500 A.D., known as the Little ice age, the coldest period in 4000 years. From 1500 to 2000 A.D the temperature is recovering to a normal state. A wavelet spectrum analysis of the data series shows the climate shifts at figure 1 and dominant periods on figure 3.
The 2000-year Temperature Clock
Figure 3: The 2000-year Greenland temperature clock.
Figure 3 show the longest period form figure 1. The 2046-yr climate period and the 420-yr climate period state at the years 1970, 2020 and 2120. The long 2046-year period had a minimum close to the year 1600, at the Litle Ice Age.
The 2000-year climate periode has a cold period recovery from 1600 A.D. to 2120. From 2120 A.D., the long-term continues into a new warm period. At the same time the 420-year period has a warm state close to 1970 A.D., and moves into a minimum close to 2150 A.D.