Sentences with word «paleotemperature»

Bradley, R.S., 1996: Are there optimum sites for global paleotemperature reconstruction?

Our global paleotemperature reconstruction includes a so - called «uptick» in temperatures during the 20th - century.

In North America the Post-Roman-Carolingian Period was marked by warm temperatures in the northern parts, with mean paleotemperatures in central Canada about 1 ° C above the present.

Our primary conclusions are based on a comparison of the longer term paleotemperature changes from our reconstruction with the well - documented temperature changes that have occurred over the last century, as documented by the instrumental record.

Mann08 seems to be a curious choice, as far as supporting the robustness of mainstream AGW Consensus paleotemperature reconstructions.

Video above reviews the sad history of the climate denial machine's ugly attacks on Mann and his now richly affirmed paleotemperature studies.

Could someone tell me how it is possible to reconstruct paleotemperatures to fractions of a degree using any kind of analysis.

Zeebe, R.E., Seawater pH and isotopic paleotemperatures of Cretaceous oceans, Palaeogeography, Palaeoclimatology, Palaeoecology, 170, 49 - 57, 2001.

In contrast to paleohydrological records, there are fewer high - resolution paleotemperature records in the Southwest and evidence for anomalous medieval warmth in this region is less comprehensive (5).

The latter possibility is at odds with most paleotemperature records [Schouten et al., 2003; Tripati et al., 2003; Pearson et al., 2007; Littler et al., 2011; Royer et al., 2012].

DR1 in the GSA Data Repository1) to derive independent paleotemperature estimates.

Although there is limited evidence of ice - rafted debris in the Arctic from the Miocene and into the Eocene, suggesting some continental glaciation (Stickley et al., 2009; St. John and Krissek, 2002), empirical evidence suggests that widespread Northern Hemisphere glaciation did not occur until 2.75 Ma (Ravelo et al., 2004), which is substantiated by recent Pliocene paleotemperature SST estimates near Svalbard between 10 and 18 °C (Robinson, 2009).

Refined paleotemperature estimates from the annual growth rings and δ18O of cellulose in fossil wood also showed considerably warmer TSTs in the Arctic during the Pliocene, yielding a MAT of — 0.5 ± 1.9 °C and a ΔMAT of ∼ 19 °C (Table 1).

However, global warming such as is occuring now also has some regionality such as Arctic amplification... Did you have a particular paleotemperature map in mind?

It is conceivable that the isotope and tetraether paleotemperature proxies are biased toward the warm season because they are effectively the result of summer productivity.

A: Our global paleotemperature reconstruction includes a so - called «uptick» in temperatures during the 20th - century.

A comparison of the variability of a climate model with paleotemperature estimates from a network of tree - ring densities.

Paleotemperature reconstructions using the TEX86 organic biomarker display no unusual response to the Toba eruption.

ABSTRACT A theory is described based on resonant thermal diffusion waves in the sun that explains many details of the paleotemperature record for the last 5.3 million years.

Thus, the 20th century portion of our paleotemperature stack is not statistically robust, can not be considered representative of global temperature changes, and therefore is not the basis of any of our conclusions.

Our study did not directly address this question because the paleotemperature records used in our study have a temporal resolution of ~ 120 years on average, which precludes us from examining variations in rates of change occurring within a century.

... the 20th century portion of our paleotemperature stack is not statistically robust, can not be considered representative of global temperature changes...

Thus, the 20thcentury portion of our paleotemperature stack is not statistically robust, can not be considered representative of global temperature changes, and therefore is not the basis of any of our conclusions.

In a «Q&A» posted on the RealClimate blog, Harvard's Jeremy Shakun says: «the 20th century portion of our paleotemperature stack is not statistically robust, can not be considered representative of global temperature changes.»

When pressed on their findings, the authors of the Marcott study admitted that «the paleotemperature records used in our study have a temporal resolution of about 120 years on average.»

And the Marcott authors were forced to admit that at the time, clarifying that «the 20th century portion of our paleotemperature stack is not statistically robust» and «can not be considered representative of global temperature changes.»

Keigwin wrote of apparent changes in paleotemperature of 1 C or 1.5 C, implying a temperature resolution with errors smaller than these values.