Sentences with phrase «global reconstruction»
"Global reconstruction" refers to the process of rebuilding or repairing something on a worldwide scale. It means making changes or improvements that affect and involve every part of the world. Full definition
But I'm less concerned now that I have read the paper over more carefully, because I think that Figure 1a and 1b give a pretty good sense of what features of higher resolution reconstructions (specifically, our ’08 global reconstruction which is shown) are potentially captured.
dotearth.blogs.nytimes.com
A cursory analysis of the past 10,000 years global reconstructions quickly shows that there has not been a single significant abrupt warming event.
Marcott and May's Holocene global reconstructions for the interglacial plateaus trendlines are included for comparison.
May and Marcott's global reconstructions rates are included.
All of this work will soon be advanced enormously by a major new collaborative international working group led by Kathleen Morrison, Land Use 6000 (LU6K), which aims to provide empirical global reconstructions of land use and land cover over the past 6000 years and earlier as part of the Land Cover 6000 project (LC6K) of PAGES.
Using instead the 4.0 + / -0.8 C warming estimate from the Annan and Hargreaves (2013; doi: 10.5194 / cp -9-367-2013) global reconstruction of temperature changes at the LGM implies an even lower ECS best estimate, of 1.56 C.
«However, Fig. 15 and the associated uncertainties discussed in Section 3.4 show that long term estimates of time variable sea level acceleration in 203 year global reconstruction are significantly positive, which supports our previous finding (Jevrejeva et al., 2008a), that despite strong low frequency variability (larger than 60 years) the rate of sea level rise is increasing with time.»
Marcott and May's Holocene global reconstructions are included.
The R code to map the proxy locations, the references and metadata for the proxies, and the global reconstruction spreadsheet can be downloaded here.
This difference would not be all that noteworthy, except for the fact that Loehle 2008 is supposed to be a global reconstruction... and the magnitude of the MWP - LIA difference should almost certainly be smaller for a global reconstruction than for a Northern Hemisphere one.
A Holocene Temperature Reconstruction Part 4: The global reconstruction.
Figure 2 provides a comparison of them all, starting in AD 500 (the earliest date in Mann 2008's global reconstruction), with the northern hemisphere instrumental record shown for comparison.
Ljungqvist 2010 suggests that his own reconstruction may have underestimated the magnitude of Northern Hemisphere cooling during the Little Ice Age, but Loehle's still appears to be an outlier if it is considered as a global reconstruction.
Finally, a global reconstruction of sea level (Jevrejeva et al. in Geophys Res Lett 35: L08715, 2008) and a reconstruction of the North Atlantic Oscillation (NAO) index (Luterbacher et al. in Geophys Res Lett 26:2745 — 2748, 1999) are analyzed and compared: both sequences cover about three centuries from 1700 to 2000.
In general, SST tends to dominate any global reconstruction.
Stars relate to the 7 tide gauges used in the global reconstruction.
If you accept them then you must accept that the global reconstructions of temperature from proxies all indicate that today's warming is unusual and more extreme.
By choosing a specific (published) global reconstruction (and keeping the time interval fixed), you can easily shift the baseline by at least 0.3 C.