Sentences with phrase «kyr indicate»
The simultaneous increase in energy content of all the major components of the climate system and the pattern and amplitude of warming in the different components, together with evidence that the second half of the 20th century was likely the warmest in 1.3 kyr indicate that the cause of the warming is extremely unlikely to be the result of internal processes alone.
https://www.reddit.com/ Not exact matches
Over very long time periods such that the carbon cycle is in equilibrium with the climate, one gets a sensitivity to global temperature of about 20 ppm CO2 / deg C, or 75 ppb CH4 / deg C. On shorter timescales, the sensitivity for CO2 must be less (since there is no time for the deep ocean to come into balance), and variations over the last 1000 years or so (which are less than 10 ppm), indicate that even if Moberg is correct, the maximum sensitivity is around 15 ppm CO2 / deg C. CH4 reacts faster, but even for short term excursions (such as the 8.2 kyr event) has a similar sensitivity.
Statistical analysis indicates only a ≤ 3 % probability that the number of matches between observed and template - derived onsets of Dansgaard - Oeschger events between 13 and 46 kyr B.P. resulted by chance.
«An examination of the fossil record indicates that the key junctures in hominin evolution reported nowadays at 2.6, 1.8 and 1 Ma coincide with 400 kyr eccentricity maxima, which suggests that periods with enhanced speciation and extinction events coincided with periods of maximum climate variability on high moisture levels.»
But as I said, there are plenty of proxies that indicate cold during the 8.2 kyr event.
«The evidence currently available indicates that NH mean temperatures during medieval times (950-1100) were indeed warm in a 2 - kyr context and even warmer in relation to the less sparse but still limited evidence of widespread average cool conditions in the 17th century (Osborn and Briffa, 2006).
Figure 6.10 b illustrates how, when viewed together, the currently available reconstructions indicate generally greater variability in centennial time scale trends over the last 1 kyr than was apparent in the TAR.