Sentences with phrase «paleotemperatures in»

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.

Not exact matches

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.

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.

Taken together, Station S and paleotemperatures suggest there was an acceleration of warming in the 20th century, though this was not an explicit conclusion of the paper.

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.»

Now let's look at Keigwin's justly famous Sargasso Sea dO18 proxy temperature reconstruction: (1996) «The Little Ice Age and Medieval Warm Period in the Sargasso Sea» Science 274, 1503 - 1508 This isn't meant as a general criticism, however, the reconstructed Sargasso Sea paleotemperature rests on Globigerinoides ruber calcite.

That (+ / --RRB- 2.4 C is the minimal reportable methodological error in any dO18 proxy paleotemperature reconstruction, apart from invisible environmental confounding effects such as monsoon shifts.

A: 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.

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 (5In 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 (5in the Southwest and evidence for anomalous medieval warmth in this region is less comprehensive (5in this region is less comprehensive (5).

Barring a dramatic breakthrough in reconciliation of some long - standing differences in the magnitude of paleotemperature estimates for different proxies, the range of paleo - sensitivities will continue to have this uncertainty.

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).

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.

1998 David W. Hastings, et al., «Foraminiferal Magnesium in Globeriginoides Sacculifer as a Paleotemperature Proxy.»

I would be particularly interested in hearing from any defenders of these global paleotemperature analyses by Mann et al..