Sentences with phrase «in atmospheric deposition»

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.

From the atmosphere, it generally falls to the surface in atmospheric deposition, generating a series of effects — corrosion of buildings, bridges and other human - made structures, acidification of soils and water bodies, and inadvertent fertilization of trees and grasslands, creating unnatural growth rates, nutrient imbalances and decreasing or altering biodiversity.

Data will be analyzed to determine, where possible, baseline conditions to which changes in atmospheric deposition as well as chemical and biological changes can be detected and explained.

Not exact matches

In an upcoming paper, Max Bothwell, a scientist at Environment Canada, proposed that climate change is one of four factors — along with atmospheric deposition of nitrogen from fossil fuel burning — boosting the blooms.

«We have found that the deposition of sulfur compounds in the Antarctic after very large volcanic eruptions in the tropics may be lower than previously thought,» the atmospheric researcher summarizes the findings of the study which has just been published in the current issue of the international «Journal of Geophysical Research — Atmosphere.»

«While concentrations measured in Antarctic ice cores are very low, the records show that atmospheric concentrations and deposition rates increased approximately six-fold in the late 1880s, coincident with the start of mining at Broken Hill in southern Australia and smelting at nearby Port Pirie.»

«Especially in the more remote regions like northern Lake Michigan and Lake Superior, it's almost all atmospheric deposition.»

A substantial portion of the planet is greening in response to increasing atmospheric carbon dioxide, nitrogen deposition, global warming and land use change.

Overall, dippers had higher mercury levels than most other songbirds tested in western North America, which may be due to more atmospheric deposition of mercury in snow at these high elevations.

This has led to a large decrease in sulfur emissions, and less atmospheric deposition of sulfate to agricultural fields, and consequently, declining sulfate concentrations in rivers.

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

The flux of nutrients associated with this discharge consists of an annual median of three million tonnes of nitrogen, twenty thousand of phosphorus, and three million of silica, which represent a magnitude of inorganic nutrients comparable to that of external sources traditionally considered in marine studies, such as the atmospheric deposition and riverine runoff.

Thus, past and future increases in atmospheric nitrogen deposition have the potential to alter the base of the marine food web; and, in the long term, the structure of the ecosystem.

Given the likelihood that the magnitude of atmospheric nitrogen deposition will continue to increase in the future, the North Pacific Ocean could rapidly switch to having surplus nitrate.

Their assessment revealed a consistent picture of increasing nitrate concentrations, the magnitude and pattern of which can only be explained by the observed increase in atmospheric nitrogen deposition.

«Fifty - four percent of that is fertilizer — the Haber - Bosch process; 11 percent is atmospheric deposition — the plus side of pollution; 18 percent is in situ fixation,» or nitrogen - fixing cover crops, like legumes, Sanchez said.

Importantly, the white graphene is produced in a standard atmospheric pressure chemical vapor deposition process, which Stehle and her colleagues believe could easily be scaled up to commercial production volume levels at a reasonable cost.

How do phytoplankton respond to atmospheric nitrogen deposition in the western North Atlantic, an area downwind of large agricultural and industrial centers?

CONTENT CONTAINED IN THIS PACKAGE INCLUDES: - LAYERS OF THE EARTH - THE SOLAR SYSTEM - WEATHERING - EROSION - DEPOSITION - THE EARTH»S ATMOSPHERIC LAYERS - COMPOSITE VOLCANOES - SHIELD VOLCANOES - CINDER CONES - CALDERAS - RENEWABLE ENERGY - PLATE BOUNDARY - SUBDUCTION - DIVERGENT - COLLISION - TRANSORM - LANDFORMS - NORMAL FAULT - REVERSE FAULT - STRIKE - SLIP FAULT - PHASES OF THE MOON - COMMON AIR POLLUTANTS - TYPES OF CLOUDS - GEOLOGIC TIME SCALE - THE WATER CYCLE - MINERAL FORMATION - THE ROCK CYCLE - MOHS HARDNESS SCALE - TYPES OF SOIL - TYPES OF STRESS

This is due to the fact that changes in atmospheric transport and deposition in the case of 10Be or changes in the carbon cycle in the case of 14C can influence the measured concentrations.

According to the scientists, there is no evidence that trees are growing faster in Panama, despite the «long - term increases in nitrogen deposition and atmospheric carbon dioxide».

Perhaps unsurprisingly, these effects were amplified in areas where atmospheric sulfate deposition had been experimentally elevated to begin with.

A research group led by the South Korean Pohang University has measured the effects of atmospheric and fluvial nitrogen deposition [through nitrate] in the coastal seas around China, Korea and Japan.

Deposition of atmospheric 210Pb and total beta activity in Finland.

Trends in bulk deposition and atmospheric concentration of air pollutants in the Finnish Integrated Monitoring catchment Pallas during 1992 — 2012.

The relationship between N2O fluxes and NO3 — concentrations is consistent with observations from small streams (Baulch et al. 2011) as well as observed positive relationships between concentrations of N2O and NO3 — in reservoirs (Beaulieu et al. 2015) and in lakes receiving atmospheric nitrogen deposition (McCrackin and Elser 2011).

Reductions in NPP in the South Pacific were associated with a 35 percent decline in atmospheric iron deposition.

Also, acidification in rivers and lakes is expected to increase as a result of acidic atmospheric deposition (Ferrier and Edwards, 2002; Gilvear et al., 2002; Soulsby et al., 2002).

The Atmospheric Science Group at Manchester works in the areas of the microphysics of clouds and aerosol, heterogeneous atmospheric chemistry, radiative transfer, the deposition, conversion and transport of atmospheric pollution, thunderstorm electrification, atmospheric dynamics and remote sensing.

Increased uptake in the past decade may be a consequence of a reduced rate of deforestation [217] and fertilization of the biosphere by atmospheric CO2 and nitrogen deposition [187].

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 oceans» uptake and storage capacity for greenhouse gases will be affected by changes in nutrient availability resulting from other changes in precipitation, runoff, and atmospheric deposition.

• The oceans» uptake and storage capacity for greenhouse gases will be affected further by changes in nutrient availability in the ocean resulting from other changes in precipitation, runoff, and atmospheric deposition.

Scientific confidence of the occurrence of climate change include, for example, that over at least the last 50 years there have been increases in the atmospheric concentration of CO2; increased nitrogen and soot (black carbon) deposition; changes in the surface heat and moisture fluxes over land; increases in lower tropospheric and upper ocean temperatures and ocean heat content; the elevation of sea level; and a large decrease in summer Arctic sea ice coverage and a modest increase in Antarctic sea ice coverage.

Whereas these effects on open - ocean pH are calculated to be minor, they can be higher, at rates of 0.02 — 0.12 × 10 − 3 pH units per year (< 10 % of OA by anthropogenic CO2), in coastal ecosystems (Doney et al. 2007), where atmospheric deposition is intense and the waters can be more weakly buffered.

Estimating the natural background atmospheric deposition rate of mercury utilizing ombrotrophic bogs in southern Sweden

Historical atmospheric mercury emissions and depositions in North America compared to mercury accumulations in sedimentary records

In the Arctic, the record of atmospheric deposition of Hg2 + species in lake sediments exhibits a similar global trend as atmospheric GEM concentrations inferred from Greenland firn: lake sediments show an increase in mercury deposition which parallels increasing industrialization (see reIn the Arctic, the record of atmospheric deposition of Hg2 + species in lake sediments exhibits a similar global trend as atmospheric GEM concentrations inferred from Greenland firn: lake sediments show an increase in mercury deposition which parallels increasing industrialization (see rein lake sediments exhibits a similar global trend as atmospheric GEM concentrations inferred from Greenland firn: lake sediments show an increase in mercury deposition which parallels increasing industrialization (see rein mercury deposition which parallels increasing industrialization (see ref.

In both the United States and Europe, however, most sediment and peat record reconstructions show higher deposition of atmospheric divalent mercury during the 1970s (10, 11, 14), simultaneous with the peak in worldwide production of mercury of ≈ 107 kg year − 1 (Fig. 2B)(49In both the United States and Europe, however, most sediment and peat record reconstructions show higher deposition of atmospheric divalent mercury during the 1970s (10, 11, 14), simultaneous with the peak in worldwide production of mercury of ≈ 107 kg year − 1 (Fig. 2B)(49in worldwide production of mercury of ≈ 107 kg year − 1 (Fig. 2B)(49).