Sentences with phrase «in atmospheric dust»

Comment: The observed rapid climate change events, «RCCEs» are becoming stronger based on a significant increase in atmospheric dust in both the Antarctic and Greenland ice cores during the last glacial period, as compared to past glacial periods.

One factor is the decline in atmospheric dust over the last 50 years, which is related to climate change.

Other forcings, including the growth and decay of massive Northern Hemisphere continental ice sheets, changes in atmospheric dust, and changes in the ocean circulation, are not likely to have the same kind of effect in a future warming scenario as they did at glacial times.

This was a relatively stable climate (for several thousand years, 20,000 years ago), and a period where we have reasonable estimates of the radiative forcing (albedo changes from ice sheets and vegetation changes, greenhouse gas concentrations (derived from ice cores) and an increase in the atmospheric dust load) and temperature changes.

Roughly half the mercury contamination in the United States comes from Asia; much of it may arrive aboard particles in atmospheric dust clouds.

But although some evidence points to past water oceans on Mars, only small amounts of carbonates have been found there — in Martian meteorites that landed on Earth and in atmospheric dust and bright soils on the planet.

Not exact matches

In the clouds in her model, atmospheric gas would sometimes condense onto the shimmering dust particles, increasing in size to a few millimeters biIn the clouds in her model, atmospheric gas would sometimes condense onto the shimmering dust particles, increasing in size to a few millimeters biin her model, atmospheric gas would sometimes condense onto the shimmering dust particles, increasing in size to a few millimeters biin size to a few millimeters big.

They found similar proportions of lead in atmospheric mineral dust samples collected in Switzerland.

Even as the importance of biological ice nucleation was being recognized by agricultural scientists, it still wasn't embraced by atmospheric scientists, who stuck by the traditional view that soot, or sea salt, or some as - yet - unidentified mineral in dust was seeding ice in clouds.

By the 1990s, the Owens Lake playa was the largest producer in North America of PM10 atmospheric dust — particulate matter small enough to enter human lungs.

Yoav Yair of the Open University in Ra'anana, Israel, and colleagues spent more than a year analysing the video, which was originally taken to study atmospheric dust.

Schneider coauthored a 1971 article in the journal Science about atmospheric aerosols — floating particles of soil dust, volcanic ash, and human - made pollutants.

All around us, they say, atmospheric currents tumble in cyclonic or anticyclonic patterns that remain hidden until a dust devil paints them brown.

To investigate the layers and composition of clouds and tiny airborne particles like dust, smoke and other atmospheric aerosols,, scientists at NASA's Goddard Space Flight Center in Greenbelt, Maryland have developed an instrument called the Cloud - Aerosol Transport System, or CATS.

Dust, ozone, and carbon can accumulate in valleys and basins, and mercury can be pulled to earth through atmospheric sinks that deposit it across large swaths of land.

It can attach to dust particles and rain out of the sky, in a process called atmospheric deposition.

The lead surrounding the stars — which was part of the original cloud of gas and dust from which these stars formed, not generated by reactions in the evolving stars themselves — may be dispersed within an atmospheric layer as much as 100 kilometers thick (depicted patchily in pink) that altogether weighs up to 100 billion metric tons.

For example, Mars experiences global dust storms in addition to its annual cycles of atmospheric freeze - out at the poles.

These components — specifically aerosols (particulates in the air — dust, soot, sulphates, nitrates, pollen etc.) and atmospheric chemistry (ozone, methane)-- are both affected by climate and affect climate, since aerosols and ozone can interact, absorb, reflect or scatter solar and thermal radiation.

Results: Tiny bits of atmospheric dust and particles called aerosols may play a big role in global climate change, but just how big a role is not well understood.

Anthropogenic fugitive, combustion and industrial dust is a significant, underrepresented fine particulate matter source in global atmospheric models.

Either way, I already saw that the 3DS version is less atmospheric in the lighting, but this video made it clear that other concessions were made in the port, such as the reduced dust, the weaker flashlight and the less ethereal ghosts.

Claquin et al's model - derived findings show a change in tropical atmospheric forcing of «-- 2.2 to — 3.2 W m — 2» between PI and LGM earth, due to the increased albedo of atmospheric dust.

CO2's effect of stimulating plant growth and increasing plant tolerance of aridity contributed to revegetating large areas of land that were desert at the LGM, compounding the effects of an increase in atmospheric humidity, reduced land / ocean surface ocean ration, and increased warmth, all of which combined caused the reduction of airborne dust and atmosperic albedo.

As far as Hansen's Scenario A, B, C forecasts back in the 80s, he could have just dusted off the model in 2005, plugged in the greenhouse emissions, volcanic eruptions, atmospheric component concentrations, etc..

As we know dust both blocks sunlight (cooling the Earth) and fertilizing the oceanic biotica (sequestrating atmospheric CO2) I suggest that Dust causes the changes in the temperature and CO2 recorded in the ice codust both blocks sunlight (cooling the Earth) and fertilizing the oceanic biotica (sequestrating atmospheric CO2) I suggest that Dust causes the changes in the temperature and CO2 recorded in the ice coDust causes the changes in the temperature and CO2 recorded in the ice cores.

The system has a large number of interacting parts — cloud, ice, biology, dust, ocean and atmospheric circulation — that together result in climate variation at all scales.

Since coming to PNNL, he has led or been significantly involved in studies of effects of surface heterogeneity on boundary layer structure, of mesoscale atmospheric flows induced or modulated by complex terrain, of the simulation of dust emission by wind erosion, and of the capabilities of a variety of atmospheric instruments — including a mass spectrometer and wind profiling radar — for measuring atmospheric turbulence.

Figure 1, at left: Ensemble mean differences in total atmospheric dust loading, g / m2, Experiment 3 (SST+D ust) minus Experiment 2 (SST only).

Figure 1 shows the increase in model atmospheric dust when this source is added, relative to a simulation without the added dust source.

The variability is due to day - to - day variations in temperature, strength of the surface - based temperature inversion, atmospheric humidity, and the presence of «diamond dust» (near - surface ice crystals).

The skyline is covered in a haze due to atmospheric dust blown in from deserts and mass crop burning in neighbouring states, as well as smoke from open fires lit by millions like Kunti to keep warm or to cook food.

«The beginning of the Bølling - Alleröd warm period was marked in Greenland by an abrupt rise in 18O, an abrupt drop in dust rain, and an abrupt increase in atmospheric methane content.

There are a number of man - made contributory factors that may have had specific impacts on the atmospheric heating, e.g. local warming in the cities (due to housing, roads, and other resultant factors), smoke and dust over long distances or deforestation of huge forest areas.

The second part of the dissertation analyzes dust emission in an atmospheric general circulation model (AGCM), where realistic simulation is inhibited by the model's coarse resolution compared to the scale of the circulations observed to mobilize dust.

They involve changes in ocean and atmospheric circulation, ice, cloud, dust and biology.

Hubert Lamb, founder of the CRU, identified a major part of the aerosol problem in 1970 when he created the Dust Veil Index (DVI) designed to quantify the impact of volcanic dust on the atmospheric energy balaDust Veil Index (DVI) designed to quantify the impact of volcanic dust on the atmospheric energy baladust on the atmospheric energy balance.

They showed the evidence to 77 domain experts (i.e., atmospheric chemists with expertise in condensation trails, and geochemists working on atmospheric deposition of dust and pollution), and asked about each of the claims made by «SLAP theorists.»

The estimated GST drop due to fine dust from the actual atmospheric nuclear explosions based on the published simulation results by other researchers (a single column model and Atmosphere - Ocean General Circulation Model) has served to explain the stagnation in global warming.

It is further argued that the transition of vertical circulation patterns is in response to adjustments to geostrophic imbalance — an adjustment time scale of 6 — 9 h. Although unproven, we suggest that antecedent rainfall over the alkali desert 2 weeks prior to the event was instrumental in lowering the bulk density of sediments and thereby improved the chances for dust ablation by the atmospheric disturbance.

Among illustrative irreversible impacts that should be expected if atmospheric carbon dioxide concentrations increase from current levels near 385 parts per million by volume (ppmv) to a peak of 450 — 600 ppmv over the coming century are irreversible dry - season rainfall reductions in several regions comparable to those of the «dust bowl» era and inexorable sea level rise.

The Barbados annual dust cycle is linked to the cycle of dust activity in North Africa and to seasonal changes in large - scale atmospheric circulation patterns.

The researchers, most of them based at Columbia University's Lamont - Doherty Earth Observatory, say it cements the theory that atmospheric moisture, and thus dust, move in close step with temperature on a global scale; the finding may in turn help inform current ideas to seed oceans with iron - rich dust in order to mitigate global warming.

This enhancement of AOD is attributed to a rise in the atmospheric load of BC, nss - SO4 =, NO3, POA and SOA by factors of 3.3, 2.6, 2.7, 2.3 and 1.2, respectively, whereas we assumed that the natural dust and sea - salt sources remained constant.

Calculate the changes in the atmospheric transmissivity of radiant energy over the last 2,000 years derived from a variable ingress of stellar, meteoritic and cometary dust, terrestrial dust, terrestrial volcanic aerosols and industrial aerosols.

The recent demonstration that an inadequate supply of iron limits primary production in this region supports earlier speculation that, in the past, fluctuations in the atmospheric deposition of iron - bearing dust may have driven large changes in productivity.

Its current dust output is essentially transport - limited, but with expected changes in future atmospheric circulation in response to increasing greenhouse gas concentrations, changes to deflation in the Bodélé may impose critical changes on the behavior of the Earth system in response to the role that dust plays in the biosphere and the sheer quantity emitted from this key region.