Sentences with phrase «paleoclimate trends»

Based on paleoclimate trends, scientists are putting the odds of the U.S. Southwest sliding into a decades - long megadrought at around 50/50.

This post compares modern instrumental trends to paleoclimate trends.

This post examines natural paleoclimate trends and simple characteristics of past and present climate cycles at different time scales.

This post compares modern instrumental trends to paleoclimate trends.

This post compared modern instrumental trends to paleoclimate trends.

This post examines natural paleoclimate trends and simple characteristics of past and present climate cycles at different time scales.

Not exact matches

«Paleoclimate researchers find connection between carbon cycles, climate trends: Carbon cycling research can help scientists predict global warming and cooling trends.»

«Our study has found evidence to the contrary, suggesting that in fact, the future long - term trend based on paleoclimate reconstructions is likely towards diminishing precipitation, with no relief in the form of increased Mediterranean storms, the primary source of annual precipitation to the region, in the foreseeable future.»

-- The paleoclimate history gives us trends; as they come up with higher resolution info (ice cores, mud cores, etc) they give us sudden dramatic changes as unexplained fact.

These long - term trends show the largest increase in temperatures of any paleoclimate event during the past millions of years.

Paleoclimate characteristics and trends provide the overarching framework and climate history to better understand centennial temperature fluctuations and potential future global temperature tipping points.

-- The paleoclimate history gives us trends; as they come up with higher resolution info (ice cores, mud cores, etc) they give us sudden dramatic changes as unexplained fact.

What about the feedbacks that are not normally well represented by ECS and normally fall into the Earth System Climate Sensitivity, stuff like the Arctic Ice cover, which now has trends over decades closer to what was seen on centuries in paleoclimate:

[A quick note on terminology: All constraints have to be based on observations of some sort (historical trends, specific processes, paleoclimate etc.) and all constraints involve models of varying degrees of complexity to connect the observation to the sensitivity metric.

The paleoclimate evidence from this new study supports the attribution of the tropical temperature trend to the ever - increasing greenhouse gas burden in the atmosphere.

However, given what we are seeing in terms of current climate trends and the paleoclimate record, such a name would seem to be more a matter of wishful thinking than an apt description of the processes involved.

The occurence of El Niño itself is — as far as science understands the phenomenon, based largely on Pliocene paleoclimate comparisons, even Eocene «clam studies «-- probably not strongly influenced by the trend of global climate warming.

In fact, Marohasy points out that a lack of rising temperatures for recent decades is so common in paleoclimate reconstructions that tendentious climate scientists have necessarily added heavily adjusted, hockey - stick - shaped instrumental records (e.g., from NASA GISS, HadCRUT) on to the end of the trend so as to maintain the visualization of an ongoing dangerous warming.

When I hear this criticism of the paleoclimate record, namely that we have only indirect knowledge of it, which the «tool man» contrasts with the knowledge we gain of trends by means of satellites, I am reminded that all knowledge is from one perspective or another, indirect.

The linear trend line is now at +1.06 °C, which is perhaps the best temperature to compare to paleoclimate temperatures, because the latter are «centennially - smoothed,» i.e., the proxy measures of ancient temperature typically have a resolution not better than 100 years.

Although not part of our study, high - resolution paleoclimate data from the past ~ 130 years have been compiled from various geological archives, and confirm the general features of warming trend over this time interval»

In paleoclimate, if you want to know the certainty of the average trend in the blade of the stick, you wouldn't take the extremes of all the inputs to calculate uncertainty, you take the variance in the output and use some method i.e. monte carlo or a DOF estimate.

Such potential changes in variability are in agreement with instrumental records and paleoclimate reconstructions, which show that the magnitude and trend of hydroclimatic variability has not been constant in the Southwest during the Common Era (C.E.).

However, paleoclimate data can not be ignored or dismissed when trying to understand present - day temperature trends.

Although not part of our study, high - resolution paleoclimate data from the past ~ 130 years have been compiled from various geological archives, and confirm the general features of warming trend over this time interval (Anderson, D.M. et al., 2013, Geophysical Research Letters, v. 40, p. 189 - 193; http://www.agu.org/journals/pip/gl/2012GL054271-pip.pdf).

Jim D, if you and others like you aren't willing to do what must be done to greatly increase the price of carbon, then all your talk of ice sheet melting, sea level rise, climate tipping points, global temperature trends, the earth's paleoclimate history, and climate model projections — all of that talk is mere Kabuke theater.

We are so quick as scientists, non experts, the lay public, some ill informed undergrads, ad infinitum, to argue in this blog, however, you as a first hand expert modeling paleoclimate and modern climate trends and obviously with a handle on chemistry and physics, also have a vested interest in our planet and though you do the modeling for a living, I do not doubt it has helped you gain inisghts and opened up your eyes to the complexity and current to future detriments and potentialities we all face as humanity.

A similar negative trend is seen in most other Holocene paleoclimate records from northern Sweden, e.g. changes in tree - limit (Karlén 1976; Kullman 1995); pollen (Barnekow 1999); chironomids (Larocque and Bigler 2004); oxygen - isotopes in lacustrine biogenic silica (Shemesh et al. 2001) and in lacustrine carbonates (Hammarlund et al. 2002).

Our ability to place the recent temperature increase in a longer paleoclimate perspective is also hampered by an apparent change in the sensitivity of recent tree - growth to temperature at high northern latitudes where trends in TRW and MXD have been reported to increasingly diverge from the instrumental records during the second half of the twentieth century (Jacoby and D'Arrigo 1995; Briffa et al. 1998a, b; D'Arrigo et al. 2007).

The article also incorrectly equates instrumental surface temperature data that Jones and CRU have assembled to estimate the modern surface temperature trends with paleoclimate data used to estimate temperatures in past centuries, falsely asserting that the former «has been used to produce the «hockey stick graph»».