Sentences with phrase «most atmospheric air»

Most atmospheric air is comprised of roughly 21 % oxygen.

Not exact matches

Keeping atmospheric concentrations of greenhouse gases below 550 ppm, let alone going back to 350 ppm or below, will not only require a massive shift in human society — from industry to diet — but also, most likely, new technologies, such as capturing CO2 directly from the air.

«We found that the Antarctic microbes have evolved mechanisms to live on air instead, and they can get most of the energy and carbon they need by scavenging trace atmospheric gases, including hydrogen and carbon monoxide,» she says.

For the most recent glacial periods ice cores provide climate proxies from their ice, and atmospheric samples from included bubbles of air.

Although observatories are built at sites that typically have clear skies and relatively calm air layers, the only ways to get truly sharp images is go above the atmosphere (think Hubble Space Telescope) or to build highly complicated adaptive optics systems that correct for the atmospheric turbulence (and even most imperfections of the telescope itself).

He painted en plein air, and the majority of his most important paintings depict rainy weather while documenting street life and atmospheric effects.

When the reseachers at the Center for International Climate and Environmental Research — Oslo (CICERO) applied their computer «model and statistics to analyse temperature readings from the air and ocean for the period ending in 2000, they found that climate sensitivity to a doubling of atmospheric CO2 concentration will most likely be 3.7 °C, which is somewhat higher than the IPCC prognosis.»

Instead, the researchers found that disturbances in atmospheric circulation, the large - scale movement of air, have the most effect on drought because they can affect factors that will cause it to rain more or less.

Several of the most disconcerting atmospheric problems include smog and air pollution, which are responsible for a higher incidence of respiratory diseases and death; acid rain, which contaminates numerous other ecosystems such as watersheds and forests; and finally, one particularly serious issue, climate de-stabilization caused by the accelerated rate of global warming.

I hope they are not trying their suggestion of igniting the atmospheric methane that now covers most of northern hemisphere — that would be a serious fuel air bomb.

Keeling's record of data from Mauna Loa is considered one of the best and most consistent climate records anywhere, though scientists also use other sources for atmospheric data, including samples of air trapped in polar ice, to analyze CO2 levels in past millennia.

Leaf area index, which is also enhanced by increasing atmospheric carbon dioxide, was the second most important factor, contributing an additional 21.8 percent, followed by climate change (precipitation and air temperature together) and the fraction of photosynthetically active radiation, which accounted for the remaining 18.3 and 14.6 percent increase in NPP, respectively.

Working with a total of 2,196 globally - distributed databases containing observations of NPP, as well as the five environmental variables thought to most impact NPP trends (precipitation, air temperature, leaf area index, fraction of photosynthetically active radiation, and atmospheric CO2 concentration), Li et al. analyzed the spatiotemporal patterns of global NPP over the past half century (1961 — 2010).

By 1970 the US Air Force Cambridge Laboratories had the most highly developed science on atmospheric optical effects.

Its location next to a subtropical high - pressure belt of descending air produces stable atmospheric conditions over most of its surface area, and the climate generally is dry.

28 29 7.4.5.2 Physical Mechanisms Linking Cosmic Rays to Cloudiness 30 31 The most widely studied mechanism proposed to explain the possible link between GCR and cloudiness is 32 the «ion - aerosol clear air» mechanism, in which atmospheric ions produced by GCR facilitate aerosol 33 nucleation and growth ultimately impacting CCN concentrations and cloud properties (Carslaw et al., 2002; 34 Usoskin and Kovaltsov, 2008).

The most widely studied mechanism proposed to explain the possible link between GCR and cloudiness is the «ion - aerosol clear air» mechanism, in which atmospheric ions produced by GCR facilitate aerosol nucleation and growth ultimately impacting CCN concentrations and cloud properties (Carslaw et al., 2002; http://www.sciencemag.org/content/298/5599/1732.abstract

The Korea Meteorological Administration announced that the average atmospheric concentration of particulate matter measuring 10 micrometers (PM10) on the day was 228 micrograms per cubic meter, the most dangerous level in its five - level air pollution scale.

Long wave cloud forcing is the contribution to atmospheric thermal energy flux most relevant to air temperature.

[26] Historically, the most intense storms and precipitation events in California have been tied to wintertime atmospheric rivers that fed on high levels of water vapor in the air.

One of the most striking changes is the decline of sea ice concurrent with changes in atmospheric circulation and increased surface air temperature.

All that is needed is to add heat carried upwards past the denser atmosphere (and most CO2) by convection and the latent heat from water changing state (the majority of heat transport to the tropopause), the albedo effects of clouds, the inability of long wave «downwelling» (the blue balls) to warm water that makes up 2 / 3rds of the Earth's surface, and that due to huge differences in enthalpy dry air takes far less energy to warm than humid air so temperature is not a measure of atmospheric heat content.

However, because atmospheric concentrations of water vapor tend to be at most only a few percent of the amount of air (and usually much lower), they are both often expressed in units of grams of water vapor per kilogram of (moist or dry) air.

It is ignored in most assessments of atmospheric gases; they record only dry air at sea level.

Hence, atmospheric GEM concentrations inferred from Greenland firn air and global anthropogenic Hg emissions have exhibited consistently similar trends during the most recent decades (Fig. 2), suggesting that the atmospheric reservoir of mercury at mid - and high - northern latitudes has been driven mainly by anthropogenic emissions during the last decades.

Most anthropogenic sources have been located at temperate northern latitudes, and global atmospheric circulation transfers to Greenland air masses from North America, Europe, and, to a lesser extent, Asia (46).

One of the most well - known effects of global warming is an intensification of the water cycle, with higher air temperatures leading to increased evaporation from the seas and soils, and more atmospheric water vapor contributing to more frequent heavy precipitation events.