Sentences with phrase «at high northern latitudes»

See K. R. Briffa, F. H. Schweingruber, P. D. Jones, T. J. Osborn1, S. G. Shiyatov & E. A. Vaganov, «Reduced sensitivity of recent tree - growth to temperature at high northern latitudes», Nature 391, 678 - 682 (12 February 1998).

However, the plots also reveal some substantial differences at a regional level, notably over the North Atlantic Ocean, the sub-tropical Atlantic and Pacific Oceans in the SH, and at high northern latitudes during June to August.

These tectonic events led to changes in the circulation of the oceans and the atmosphere, which in turn fostered the development of persistent ice at high northern latitudes.

You can show that if the transmission decayed exponentially, as it would if the absorption factor were independent of wavelength, then doubling CO2 would warm the Earth by about 50 degrees C instead of 2 to 4 degrees (which is plenty bad enough, once you factor in that warming is greater over land vs. ocean and at high Northern latitudes).

Many aspects of a temperature increase would probably be welcome at high northern latitudes that are now too cold over much of the year.

«The Milankovitch theory of climate change proposes that glacial - interglacial cycles are driven by changes in summer insolation at high northern latitudes [i.e., solar irradiance received].

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).

Only a strong reduction in summer insolation at high northern latitudes, along with associated feedbacks, can end the current interglacial.

However, both sediment records of atmospheric deposition of Hg2 + species at high northern latitudes and atmospheric GEM concentrations inferred from Greenland firn air support the conclusion that transfer of anthropogenic inorganic mercury through the atmosphere to terrestrial and marine reservoirs occurs on a large scale.

For example, atmospheric GCM simulations driven by reconstructed SSTs from the Pliocene Research Interpretations and Synoptic Mapping Group (Dowsett et al., 1996; Dowsett et al., 2005) produced winter surface air temperature warming of 10 °C to 20 °C at high northern latitudes with 5 °C to 10 °C increases over the northern North Atlantic (~ 60 ° N), whereas there was essentially no tropical surface air temperature change (or even slight cooling)(Chandler et al., 1994; Sloan et al., 1996; Haywood et al., 2000, Jiang et al., 2005).

It's albedo change from increased autumnal snow cover at high northern latitudes.

Clark & Huybers [76] fit a polynomial to proxy temperatures for the Eemian, finding warming as much as +5 °C at high northern latitudes but global warming of +1.7 °C «relative to the present interglacial before industrialization».

GMT drops initially at glacial inception in response to decreased summer radiation at high northern latitudes that would have led to equatorward extension of sea ice and snow cover with associated cooling from increased albedo.

The warm period in recent years differs qualitatively from the earlier warm period centered around 1940; the earlier warming was focused at high northern latitudes, while the recent warming is more global.»

Reduced sensitivity of recent tree - growth to temperature at high northern latitudes.

Their study, also reported in The Cryosphere, included the mid-Holocene period about 6,000 years ago, when summer temperatures at high northern latitudes were 2 - 3 °C warmer than today.

The main reason for this warmer climate was an increased amount of energy from the Sun being received at high northern latitudes due to Earth's orbital configuration, plus Earth had an increased capacity to absorb heat due to vegetation changes and reduced ice and snow cover.

The greatest rises in regional temperatures (and temperature variability) being at high northern latitudes (Liu et al. 2007; Wu et al. 2011).»

In this article I present prima facie evidence that the ongoing natural increase in spring insolation occurring at high northern latitudes, coupled with the positive feedback effect of the resultant snow and ice loss reducing the region's mean albedo over summer, comprises just such a causative agency.

Reduced sensitivity of recent tree growth to temperature at high northern latitudes.

Although there is less warming at low latitudes than at high northern latitudes, there is also less internal variability at low latitudes, which results in a greater separation of the climate simulations with and without anthropogenic forcings.

The circulation change extends into the Northern Hemisphere, producing cooling at high northern latitudes.

At high northern latitudes, this warming means longer ice - free seasons.

Averaged over the five - year period 2016 - 2020, forecast patterns suggest enhanced warming over land, and at high northern latitudes.

Despite the accompanying colder winters, getting melting going during those long hot summers is how we got rid of the ice sheets at high northern latitudes.

Near - surface permafrost at high northern latitudes will be reduced as the global mean surface temperature increases.

As we shall examine shortly, the source of «the decline» come from temperature reconstructions calculated from tree - ring density at high northern latitudes (Briffa 1998).

See e.g. slide 31 of http://www.soest.hawaii.edu/GG/FACULTY/POPP/Lecture12.ppt E.g. a decreased insolation at high northern latitudes would cause ice sheets to grow.

In response to increased trace gases, all replicated the qualitative response seen in other coupled ocean - atmosphere models: greater warming over land than ocean and maximum warming at high northern latitudes in winter.

«Climate model simulations have shown that ice albedo feedbacks associated with variations in snow and sea - ice coverage are a key factor in positive feedback mechanisms which amplify climate change at high northern latitudes...»

It is not that the polar regions are amplifying the warming «going on» at lower latitudes, it is that any warming going on AT THE POLES is amplified through inherent positive feedback processes AT THE POLES, and specifically this is primarily the ice - albedo positive feedback process whereby more open water leads to more warming leads to more open water, etc. *** «Climate model simulations have shown that ice albedo feedbacks associated with variations in snow and sea - ice coverage are a key factor in positive feedback mechanisms which amplify climate change at high northern latitudes...»

Also, the difference in annually averaged CH4 between Arctic and Antarctic latitudes is a sensitive indicator of changing CH4 emissions at high northern latitudes.

Isotopious @ 43 — It is generally agreed that orbital forcing [at high northern latitudes] is the cause of the changes between the three states of interglacial / interstade (mild glacial) / stade (full glacial).

During the last deglaciation, and likely also the three previous ones, the onset of warming at both high southern and northern latitudes preceded by several thousand years the first signals of significant sea level increase resulting from the melting of the northern ice sheets linked with the rapid warming at high northern latitudes (Petit et al., 1999; Shackleton, 2000; Pépin et al., 2001).

The Earth's natural orbital cycles [precession] were driving a simultaneous natural cooling trend, especially at high northern latitudes.

«Ever since the lakes and seas were discovered, we've been wondering why they're concentrated at high northern latitudes,» said Elizabeth (Zibi) Turtle, a Cassini imaging team associate based at the Johns Hopkins Applied Physics Laboratory, Laurel, Md. «So, seeing that there's something special about the surface in this region is a big clue to help narrow down the possible explanations.»

An 17O excess up to 7.5 per mil was observed in summer at high northern latitudes.

The warming in the last 30 years is widespread over the globe, and is greatest at higher northern latitudes.

In 1938, Callendar himself concluded that, «the combustion of fossil fuel -LSB-...] is likely to prove beneficial to mankind in several ways», notably allowing cultivation at higher northern latitudes, and because, «the return of the deadly glaciers should be delayed indefinitely».

Along with increasing temperatures over all regions of the U.S., the pattern of precipitation change is one of general increases at higher northern latitudes and drying in the tropics and subtropics over land.

Not exact matches

As the US military's attention shifts back to great - power competition, particular focus is being paid to the potential for conflict in the extreme conditions found at northern latitudes and higher elevations.

Still, because organisms at northern latitudes have evolved in a world of high ozone, «they may be susceptible to even a few percent increase in UV,» Newman says.

«At the higher latitudes of Great Britain, Scandinavia and the Baltic States, as well as Northern Germany and France, very little UVB light reaches the Earth, and it's the key wavelength required by the skin for vitamin D generation,» Elias said.

They found that about half of the change is a result of rising temperatures, particularly in areas at northern middle and high latitudes.

The research team used data from over 100 individual magnetometers located at high latitudes in the northern hemisphere.

CH4 ice appears on crater rims and mountain ridges at low latitudes and is abundant at Pluto's high northern latitudes.

The beginning of the last glacial period was characterized in the Northern hemisphere by significant accumulation of snow at high latitudes and the formation of a huge polar ice sheet.

As Cassini soared above high northern latitudes on Saturn's moon Dione, the spacecraft looked down at a region near the day - night boundary.

Qualitative indicators like sea ice coverage, spring thaw dates, and melting permafrost provide strong additional evidence that trends have been positive at middle and high northern latitudes, while glacier retreat suggests warming aloft at lower latitudes.

Also, if you look at Table T2 in this paper, you will see that ocean sea surface heat storage 0 - 700m from 1955 - 2003 (in W / m2) is always higher at northern latitudes than the corresponding southern latitudes in every case, even with the extensive Southern Ocean warming as noted by Gavin responding to # 18.