Sentences with phrase «by warming episodes»

Both events were accompanied by warming episodes the U-M-led team found by analyzing the chemical composition of fossil shells using a recently developed technique called the carbonate clumped isotope paleothermometer.

Not exact matches

Climate change, resulting in more frost - free days and warmer seasonal air temperatures, can contribute to shifts in flowering time and pollen initiation from allergenic plant species, and increased CO2 by itself can elevate production of plant - based allergens.137, 15,16,17,18,19,138 Higher pollen concentrations and longer pollen seasons can increase allergic sensitizations and asthma episodes, 20,21,155,22 and diminish productive work and school days.138, 22,23

Zachos... is a leading expert on the episode of global warming known as the Paleocene - Eocene Thermal Maximum (PETM), when global temperatures shot up by 5 degrees Celsius (9 degrees Fahrenheit).

[11] This episode marked the close of the Precambrian eon, and was succeeded by the generally warmer conditions of the Phanerozoic, during which multicellular animal and plant life evolved.

These episodes of nighttime sweating can range in severity from mild to intense, and can be caused by hormonal imbalance combined with environmental factors, such as an excessively warm sleeping environment.

In episode two of «Geneva celebrates warmer weather by crafting something off the shoulder» (perhaps a cumbersome title — probably not good for SEO), I bring you the off the shoulder top version two — this time in a lycra / jersey fabric for a fitted style (check out version 1 here) Perfect as either a bikini top, or some sort of beach to bar situation.

by Walter Chaw There's so much warm A Christmas Story / Stand By Me / «The Wonder Years» narration in David Mickey Evans's The Sandlot 2 that ten minutes in I felt as though it was boring a hole through my brain like in that one episode of «Night Gallery»by Walter Chaw There's so much warm A Christmas Story / Stand By Me / «The Wonder Years» narration in David Mickey Evans's The Sandlot 2 that ten minutes in I felt as though it was boring a hole through my brain like in that one episode of «Night Gallery»By Me / «The Wonder Years» narration in David Mickey Evans's The Sandlot 2 that ten minutes in I felt as though it was boring a hole through my brain like in that one episode of «Night Gallery».

Zachos... is a leading expert on the episode of global warming known as the Paleocene - Eocene Thermal Maximum (PETM), when global temperatures shot up by 5 degrees Celsius (9 degrees Fahrenheit).

Are the episodes thought to be actual changes in the amount of heat being radiated by the planet (because the surface of the ocean gets warmer and cooler, does the actual infrared flux from the top of the atmosphere then change as a result)?

In the case of this summer, to make it familiar, the NE North American Coast and most of Canada is cooler by extensive periods of cloud coverage, cooling caused by this region clashes with the US South extreme heat, given less bouts of clouds up North, the North American warming record would have been amazingly strong, but permanent cloud episodes over one region or another travel, never last forever, as such not causing a permanent shift in the temperature record (unless the clouds cover or not wide swats of the Polar regions).

# 92 Spencer el al 2007 paper doesn't really support the precise mechanism proposed by Lindzen for Iris effect, but more simply observes a strong TOA negative correction associated with warming events at 20 ° S - 20 ° N (that is: in the 2000 - 2005 period of observation, the most significative warming episodes of the surface + low troposphere — 40 days or more — leads to a negative SW+LW cloud forcing at the top of the atmosphere).

An article in Science (11 Nov 2005) by Scott L. Wing, et al., concludes:... «The PETM provides an important analog to present - day anthropogenic global warming, because the two episodes are inferred to have similar rates and magnitudes of carbon release and climate change (6)».

But the episode — revealed at a recent meeting of the Seismological Society of America in Salt Lake City, Utah — is a reminder that the energies released by the dangerous mix of swirling winds and warm oceans are dramatic and, with global warming, could become even more frequent and more devastating.

Climate change, resulting in more frost - free days and warmer seasonal air temperatures, can contribute to shifts in flowering time and pollen initiation from allergenic plant species, and increased CO2 by itself can elevate production of plant - based allergens.137, 15,16,17,18,19,138 Higher pollen concentrations and longer pollen seasons can increase allergic sensitizations and asthma episodes, 20,21,155,22 and diminish productive work and school days.138, 22,23

This rate (0.28 degC per century) is very different to the rates referred to by Phil Jones for the warming periods detailed in my above comment, so the slow down is very apparent when the last 20 years is compared to the rate of the 1860 to 1880 warming episode which was slightly greater than the 1920 to 1940 warming episode, and also slightly greater than the late 20th century warming episode

This period, known as the «last deglaciation,» included episodes of abrupt climate change, such as the Bølling warming [~ 14.7 — 14.5 ka], when Northern Hemisphere temperatures increased by 4 — 5 °C in just a few decades [Lea et al., 2003; Buizert et al., 2014], coinciding with a 12 — 22 m sea level rise in less than 340 years [5.3 meters per century](Meltwater Pulse 1a (MWP1a)-RRB-[Deschamps et al., 2012].»

So even though past warm episodes may have been initiated by orbital changes that caused warming and thus caused CO2 to rise, which then led to more warming, we know that the current warm episode is being driven by increasing CO2 due to the burning of fossil fuels and the clearing of forests.

In the Northern Hemisphere, they take the form of rapid warming episodes, typically in a matter of decades, each followed by gradual cooling over a longer period.

In the distant past, warming episodes appear to have been initiated by cyclical changes in Earth's orbit around the Sun that caused more... Continue reading →

In the distant past, warming episodes appear to have been initiated by cyclical changes in Earth's orbit around the Sun that caused more summer sunlight to fall in the northern hemisphere.

The earth probably can't get into a snowball anymore because the sun is warmer by a couple percent since the last snowball episode 650mya and the sun just keeps growing warmer as it ages but maybe a perfect storm of super-volcano, asteroid strike, and continents arranged just right...

This change in patterns of deep - ocean sedimentation will result in a curious, dark band of carbonate - free rock — rather like that which is seen in sediments from the Palaeocene - Eocene thermal maximum, an episode of severe greenhouse warming brought on by the release of pent - up carbon 56m years ago.

He ominously warns: «Climate scientists are used to seeing the range of weather extremes stretched by global warming, but few episodes appear as remarkable as this week's unusual heat over the Arctic.»

That's because the Puget Lobe was rapidly advancing only 14,000 years ago, triggered by the great episode of rapid global warming that preceded the Younger Dryas.

Using data to attribute episodes of warming and cooling in instrumental records, Ka - Kit Tung1 and Jiansong Zhou, 12/2012; ``... anthropogenic global warming trends might have been overestimated by a factor of two in the second half of the 20th century.»

... In short, if CM3's internal variability is realistic, there is some chance that a rapid underlying warming rate of 0.2 K decade − 1 could be ongoing as of 2015, but that this warming signal has been substantially masked (and may continue to be masked for even another decade or more) by an internal variability cooling episode.

Perhaps the most dramatic discovery of all, though, awaits us as we fly with Calvin over the Gulf Stream and Greenland: global warming caused by human - made pollution could paradoxically trigger another sudden episode of global cooling.

It is seen by eye that the smoothed curve captures the main episodes of warming and cooling in the past 162 y that are present in the raw data as it agrees with the simple running mean.

37) would show a positive trend over the previous 40 yr in a regression analysis, even though the main feature was a single decadal warming episode in the 1980s that was followed by cool anomalies.»

After reviewing evidence in both the latest global data (HadCRUT4) and the longest instrumental record, Central England Temperature, a revised picture is emerging that gives a consistent attribution for each multidecadal episode of warming and cooling in recent history, and suggests that the anthropogenic global warming trends might have been overestimated by a factor of two in the second half of the 20th century.

J. Sperry, you cite Roy Spencer in your message, saying that the view that the current episode of global warming is caused by human activities is not the consensus view.

«We have found no reason in this unfortunate episode to challenge the scientific consensus as expressed by Professor (John) Beddington, that «global warming is happening [and] that it is induced by human activity».»

As in later eras, Cretaceous warmth led to ocean stratification and anoxia; evidence shows many warm «spikes» accompanied by such anoxic episodes.

Evidence that warm episodes were regional and «not strongly synchronous» was first assembled by Hughes and Diaz (1994).

Past episodes in the earth's history, especially one that occurred about 55 million years ago, featured drastic warming accompanied by sea - level rise and other events that would be calamitous for today's civilization.

This episode of rapid global warming 55 million years ago is particularly relevant to our situation today, because it was clearly caused by greenhouse gases.

Even if warming episodes were initiated by orbital changes, the warming itself would cause the release of greenhouse gases from sources including the oceans and melting permafrost.

British viewers will see seven episodes, the last of which deals with global warming and the threat to the natural world posed by man.