Sentences with phrase «holocene global reconstructions»

Marcott and May's Holocene global reconstructions are included.

Not exact matches

A recent reconstruction from proxy temperature data [55] concluded that global temperature declined about 0.7 °C between the Holocene maximum and a pre-industrial minimum before recent warming brought temperature back near the Holocene maximum, which is consistent with our analysis.

Even putting aside the OHC data and fingerprinting, there is absolutely no evidence in model simulations (or in prevailing reconstructions of the Holocene), that an unforced climate would exhibit half - century timescale global temperature swings of order ~ 1 C. I don't see a good theoretical reason why this should be the case, but since Judith lives on «planet observations» it should be a pause for thought.

By Andy May The only recent attempt at a global Holocene temperature reconstruction available today is the one by Marcott, et al. (2013), the paper abstract can be viewed here.

Marcott paper Basically the folks at RC have probably made poor ol Marcott respond that the uptick did not matter anyway its not important, significant, robust etc don't rely on it just forget about it please etc but unfortunately for them as Ross MC on Realclimate reply, at CA says «But that is precisely what they do in Figure 3 of their paper, and it is the basis of their claim that «Global temperature, therefore, has risen from near the coldest to the warmest levels of the Holocene within the past century, reversing the long - term cooling trend that began ~ 5000 yr B.P.» Without the uptick in their proxy reconstruction this kind of statement could never have been made.

An evaluation of the status of late Holocene sea level rise constructions is provided in a recent proposal by an international group of sea level experts (including Kopp), entitled: Towards a unified sea level record: assessing the performance of global mean sea level reconstructions from satellite altimetry, tide gauges, paleo ‐ proxies and geophysical models.

By looking at proxy temperature reconstructions and at major global glacier advances, and other climate proxies, it is easy to recognize the major abrupt cooling changes of the Holocene.

But that is precisely what they do in Figure 3 of their paper, and it is the basis of their claim that «Global temperature, therefore, has risen from near the coldest to the warmest levels of the Holocene within the past century, reversing the long - term cooling trend that began ~ 5000 yr B.P.» Without the uptick in their proxy reconstruction this kind of statement could never have been made.

«We took the 5 ° × 5 ° area - weighted mean of the 73 records to develop a global temperature stack for the Holocene (referred to as the Standard 5X5 reconstruction)(Fig. 1, Aand B).

«To examine the sensitivity of our main conclusions to this missing variability, we use the 390 Mann et al. reconstruction (2) to add the amount of high - frequency variability exhibited in 391 global temperature over the past 1500 years to the Holocene stack (1) as white noise and (2) as 392 red noise.

I state in the interview that we can't be sure there aren't any abrupt global warming blips during the Holocene similar to the current one due to chronological uncertainties and the relatively low time resolution of our global temperature reconstruction.