Sentences with phrase «erosion occurs»

«Since most ice sheet erosion occurs at the margin of the ice sheet, that indicated times when the ice sheet retreated,» Cook said.

Coastal erosion occurs due to a combination of factors, including sea level rise, loss of sand supply (from the damming of rivers, shoreline structures that interrupt along - shore sand transport, dredging projects, and the paving of watersheds), and geologic changes in the land.

Erosion occurs as a result of feeding and during the creation of living spaces and is a natural process on all coral reefs.

Erosion occurs where there are more grains leaving the surface than are arriving, and deposition occurs where more grains are arriving than are leaving.

One reason that erosion occurred is an increase in fuel efficiency, Dumortier said.

Archaeologists hope that a funding and conservation boost can halt wall collapses and other erosion occurring at the ancient city on Italy's Neopolitan coast

For example, some of the largest predicted increases in erosion occurred in northern California and the mountainous areas of southern California, regions where fire will likely greatly increase.

Jens Figlus, assistant professor of ocean engineering at Texas A&M - Galveston, says the question of how much beach erosion occurred may be hard to answer because erosion always goes hand - in - hand with deposition somewhere else.

Dr Yves Godderis said that the formation of these mountains meant that the rock weathering, which was threatening to slow to a walk through much of the supercontinent, was able to continue and the steep slopes of these Hercynian Mountains produced physical erosion occurring in a humid equatorial environment, this physical erosion promoted rock weathering and removing CO2 from the atmosphere.

Not exact matches

Finding similar erosion patterns on Mars» volcanoes could help researchers understand whether the eruptions occurred in an ocean that's now vanished.

We also found it hard to account for the funnel shape using typical erosion - deposition processes that occur when a small river meanders across a relatively flat landscape.

Serious complications, including chronic pain, infection, failure or erosion of the implant are estimated to occur in around 15 per cent of women.

In order to march downwind, deposition must be occurring on the downwind faces of the ripples, and erosion must be occurring on the upwind faces.

Like asbestos, these naturally occurring fibers are natural components of rocks and soils and a potential source of exposure especially if these fibers become airborne through natural erosion or human activities producing dust.

Despite this, marked shifts to states of net coral reef erosion have not widely occurred.

Notably, the small erosion in support for these policies occurred almost entirely among non-gun-owners.

The first projection of future beach erosion all along Japanese coasts was published in 1994 by Mimura et al. (1994), who calculated that beach erosion caused by SLR would occur in values of 0.30, 0.65, and 1.00 m based on the projections of the IPCC First Assessment Report (IPCC, 1990).

On Earth, inverted channels often occur in dry, desert environments like Oman, Egypt, or Utah, where erosion rates are low — in most other environments, the channels are worn away before they can become inverted.

When used together, the researchers conclude, the state of these indices can be used as a tool to project when major impacts on coastal communities may occur, impacts that can range from flooding to erosion, and may be experienced (and here is the important part) regardless of mean sea level rise.

This chemical weathering process is too slow to damp out shorter - term fluctuations, and there are some complexities — glaciation can enhance the mechanical erosion that provides surface area for chemical weathering (some of which may be realized after a time delay — ie when the subsequent warming occurs — dramatically snow in a Snowball Earth scenario, where the frigid conditions essentially shut down all chemical weathering, allowing CO2 to build up to the point where it thaws the equatorial region, at which point runaway albedo feedback drives the Earth into a carbonic acid sauna, which ends via rapid carbonate rock formation), while lower sea level may increase the oxidation of organic C in sediments but also provide more land surface for erosion... etc..

The presence of erosions or joint space narrowing on x-rays of the involved joints is a clear indication for DMARD therapy, however one should not wait for x-ray changes to occur.

Causes of erosion include wind, water (including rainfall and floods), the scouring action of glaciers, and the repeated cycles of freezing and thawing that often occur in some areas of the world.

Erosion can happen at a much fast rate when extreme weather events occur.

For the past several years, MetaMetrics has tried to help stave off the erosion in learning that can occur during the summer months with the Summer Math Challenge.

[124] The wagon's demise occurred due to its sales erosion to minivans and crossover SUVs.

This current version of the Z has been with us for going on seven years now and an erosion of its perceived refinement has occurred.

Like many of Kazuo Ishiguro's widely - acclaimed novels, Nocturnes charts the nature of shifting relationships, the passage of time, real and perceived failures, the consequences of deferred dreams, feelings of estrangement, and the quiet but destructive erosion that occurs when truth is denied for too long, yet it does so with more attenuated gestures and less reflection... Fans of his novels may enjoy the change of pace offered by this debut, but newer readers may prefer to begin with his previous works, which better exemplify his talents.

I believe # 5, incidentally, from your point of view, though I don't think I could call the erosion of competitive advantages of certain companies to be mean reversion, if and when it occurs.

The time erosion that occurs in the first several months of a LEAPS ® option is minimal.

As you can see from the graph, time erosion of options premium is not linear (i.e. it does not occur in a straight line).

The mathematical reasons for this are complex, but the result is that the erosion of time premium in the earlier months of an option's life is much less dramatic than the erosion that occurs in the last few months.

Erosion and ulceration occurs in more severe cases, especially if trauma, secondary infection, or coexistent pruritic disease are present.

If significant erosion or ulceration has occurred to the gums, surgery or even extraction may be necessary to remedy the situation.

If allowed to remain on the tooth surface, tartar and calculus eventually erode the overlying gums and, in severe cases, erosion of the tooth roots and bone surrounding tooth roots occurs (called periodontal disease), resulting in a diseased tooth in need of extraction.

This rising sea level may be contributing to coastal erosion that is occurring in so many areas of the world today, including Ambergris Caye.

While beautifully photographed as if a National Geographic spread with muted colors, the captured erosion is far from a naturally occurring phenomenon to celebrate, and instead is a man - made effect that is destructive.

Focusing on the natural world, the Brazilian artist creates works that visualize changes that occur with the passage of time, like erosion, rising sea levels, and the depletion of the ozone layer.

In a telephone interview from India, where she was about to visit some Himalayan glaciers, Dr. Koppes noted that the highest rates of erosion by rivers and glaciers occur in areas of tectonic uplift — where the land is still rising.

A succession of high - snowpack years or operational decisions to transfer water storage from Lake Powell to Lake Mead could also result in large releases of clear water that typically cause sandbar erosion; indeed, such releases occurred from 1996 to 2000 [Mueller et al., 2014] and in 2011.

Although it is still too early in the analysis to state with certainty, it appears from the work of several investigators that there is a regional, or semicontinental cycle, of erosion and deposition that occurs every 250 — 300, 500 — 600, 1,000 — 1,300, and possibly 6,000 years within the Holocene.

Global change, we were taught, occurred slowly and by commonplace mechanisms: sediment carried by water, deposited a grain at a time: erosion effected by water and wind, the hardest rocks slowly ground down crystal by crystal.

When a break occurs in the top of the ogee weir, you have a «breach» scenario with rapid erosion downward and rapid catastrophic flow of water deluging the downstream towns.

The shorelines of Alaska illustrate the erosion that occurs as the oceans of Earth lap up and back from the land masses.

Should this occur, coastal cities, ports, and wetlands would be threatened with more frequent flooding, increased beach erosion, and saltwater encroachment into coastal streams and aquifers.

Although the drought seems to have occurred naturally, soil erosion caused by farming may have prolonged it.

Where precipitation decreases were projected, the results were more complex due largely to interactions between plant biomass, runoff, and erosion, and either increases or decreases in overall erosion could occur.

The carbon loss occurred first through the removal of the original vegetation, which stored much carbon in its leaves, stems and trunks; then through the oxidation of carbon in newly exposed soils; and finally through increased soil erosion, which carried away much of the organic - rich sediment during flooding.

Communities located on resistant bedrock or where glacio - isostatic rebound is occurring are less vulnerable to erosion.

Weather disruptions and shore erosion, for example, will begin to occur.

It takes a long time for so much erosion to occur from gentle wave action in a tropical sea.