Sentences with phrase «of palaeoclimatic»

Ruddiman and McIntyre (1981), p. 204, dismissed this since they saw no decrease in North Atlantic biological productivity, but some later data supported the idea; in 1985 Broecker suspected the meltwater pulse was the entire cause of the Younger Dryas, but later he suggested it was only the trigger that set the timing for a switch between thermohaline circulation modes, Broecker et al. (1989)(whose «synthesis of palaeoclimatic observations invigorated the community over the next decade,» according to Le Treut et al. (2007), p. 106); Broecker et al. (1990).

Secondly, we have lots of palaeoclimatic evidence for abrupt changes in the AMOC, which are leading candidates to explain Dansgaard - Oeschger transitions during the last ice age, and the cold snap 8,200 years ago.

In addition, a growing set of palaeoclimatic data, e.g., from trees, corals, sediments, and ice, are giving information about the Earth's climate of centuries and millennia before the present.

The Mobile Polar High: a new concept explaining present mechanisms of meridional air - mass and energy exchanges and global propagation of palaeoclimatic changes.

Studies of the link between orbital parameters and past climate changes include spectral analysis of palaeoclimatic records and the identification of orbital periodicities; precise dating of specific climatic transitions; and modelling of the climate response to orbital forcing, which highlights the role of climatic and biogeochemical feedbacks.

Not exact matches

Modeling the epidemiological history of plague in Central Asia: Palaeoclimatic forcing on a disease system over the past millennium.

Hegerl et al. (2006a) is based on multiple palaeoclimatic reconstructions of NH mean temperatures over the last 700 years.

Advancing tephrochronology as a global dating tool: Applications in volcanology, archaeology, and palaeoclimatic research Chronological dating, or simply dating, is the process of attributing to an object or event a date in the past, allowing such object or event to be located

The palaeoclimatic records of northern and eastern Africa and of North America indicate that droughts lasting decades to centuries are a recurrent feature of climate in these regions, so that recent droughts in North America and northern Africa are not unprecedented.

Individual decadal - resolution palaeoclimatic data sets support the existence of regional quasi-periodic climate variability, but it is unlikely that these regional signals were coherent at the global scale.

This result sheds new light on the effect of long - term fertilization by iron and macronutrients on carbon sequestration, suggesting that changes in iron supply from belowâ as invoked in some palaeoclimatic and future climate change scenarios11â may have a more significant effect on atmospheric carbon dioxide concentrations than previously thought.

Palaeoclimatic reconstructions show that the second half of the 20th century was likely the warmest 50 - year period in the Northern Hemisphere in the last 1300 years.

Abstract «Although we conclude, as found elsewhere, that recent warming has been substantial relative to natural fluctuations of the past millennium, we also note that owing to the spatially heterogeneous nature of the MWP, and its different timing within different regions, present palaeoclimatic methodologies will likely «'' flatten out» estimates for this period relative to twentieth century warming, which expresses a more homogenous global «'' fingerprint.»

Take a look at «Constraints from the Instrumental Period» and «Palaeoclimatic Evidence:» you'll find lots of empirical data based on physical observations or reproducible experimentation which support the hypothesis.

Palaeoclimatic and archaeological evidence for a 200 - yr recurrence of floods and droughts linking California, Mesoamerica and South America over the past 2000 years (The Holocene, Volume 13, Number 5, pp. 763 - 778, 2003)-- Amdt Schimmelmann et al..

Detection and attribution of external influences on 20th - century and palaeoclimatic reconstructions, from both natural and anthropogenic sources (Figure 9.4 and Table 9.4), further strengthens the conclusion that the observed changes are very unusual relative to internal climate variability.

Here we briefly discuss the radiative forcing estimates used for understanding climate during the last millennium, the mid-Holocene and the Last Glacial Maximum (LGM)(Section 9.3) and in estimates of climate sensitivity based on palaeoclimatic records (Section 9.6.3).

Even a 3.0 Â °C sensitivity, which is supported by palaeoclimatic evidence, and is the current «best - estimate», delivers us a hefty enough whack of change if we revel in the AAPG's product for the next few decades.

Development of International Palaeoclimatic data network