Sentences with phrase «lowered sea level»

Water removed from the oceans to build the glaciers lowered sea level by 140 m.

Ice accumulation on land lowered sea level by about 400 feet (120 meters).

4) The existence of pre-Norman conquest salterns — saltpans over which the tide washed and from which salt - saturated sand was taken — outside the later sea dykes on the Lincolnshire coast may point to a period of slightly lowered sea level between the late Roman and the medieval high water periods.

Fascinating NASA analysis shows how heavy continental rainfall via Nino / Nina transition lowered sea level last year.

During the last ice age, lowered sea level drained the Bering Strait, the narrow seaway now separating Alaska and Asia.

Both of those effects actually add up to lower sea levels in the area right around the former ice sheet, Mitrovica said.

These may be submerged ancient shorelines cut during times of lower sea level, «the most recent of which occurred during the last glacial period, which ended about 19,000 years ago,» Chaytor said.

These big ice sheets have frozen and melted many times in the past (producing ice ages with low sea levels and warm periods with high sea levels).

They find that a wetter climate and lower sea levels could have enticed humans to cross from Africa into the Arabian Peninsula and the Middle East during four periods, roughly around 100,000, 80,000, 55,000, and 37,000 years ago.

The reduced gravitational attraction of the Greenland ice sheet will result in lower sea levels as far away as 2000 km from Greenland in Ireland, Scotland and Norway.

The researchers then used a computer model of Earth that simulated growth in the Antarctic ice sheet to see what geophysical impacts this would have aside from generally lowering the sea level.

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..

This break was probably was formed by erosion during the last low sea level stand (while sea level was much lower and the reef was exposed as dry land).

o 8000 of the 10000 years since the last ice age were warmer than now and generally had less CO2 and lower sea levels o For 3000 years (from 5000 BP to 2000 BP) world temperatures were falling whilst CO2 levels were rising o Manâ??

Re # 29: «There are numerous examples of cities that have had to deal with rising or lowering sea levels... Current examples include Venice and New Orleans»

There are numerous examples of cities that have had to deal with rising or lowering sea levels.

It is also possible for cold climates to increase chemical weathering in some ways, by lowering sea level to expose more land to erosion (though I'd guess this can also increase oxydation of C in sediments) and by supplying more sediments via glacial erosion for chemical weathering (of course, those sediments must make it to warmer conditions to make the process effective — downhill and downstream, or perhaps via pulsed ice ages -LRB-?)-RRB-.

The comments we got back on our work were overwhelmingly positive, and were along the lines that what we had presented was a good next step — both to move past the IPCC's low sea level forecasts, and as a response to the persistent hypotheses of very high rates of sea level rise that were circulating.

If that's correct, then melting the WAIS will lower the sea level, not raise it.

But freezing ice to release 120ZJ to power the last 30 years of BNO (S) would lower sea level by a rather noticable one metre if it were land ice being frozen.

The atmosphere will warm in the same way, but first the lower sea levels are being warmed right now.

Conversely, low sea level pressure anomalies over the Beaufort Sea and Canada Basin keep the Arctic Ocean pack ice up against the western entrance.

When less than 21 mm / year seeps back to the ocean, then natural groundwater storage lowers sea level.

During times of low sea level the continents are emergent, land faunas flourish, migration routes between continents open up, the climate becomes more seasonal, and probably most importantly, the global climate tends to cool off.

Counterintuitively, global warming would actually lower sea levels at first.

The clear correlation between the net displacement of ocean water mass to land and the lower sea level during the last La Nina is a dynamical connection, showing far more than just «trend».

The increased west winds are related to lower sea level pressure at high latitudes, with greater sea level pressure in mid-latitudes.

The North Atlantic Oscillation turned positive in spring and can be seen as low sea level pressures over Iceland during May 2011 (Figure 7).

At the end of June the AD was replaced by low sea level pressure.

Aggregates that defy locally your primer version of physics and in so doing create albedo effects lowering temperature, precipitation events lowering sea level when over land and altering temperature left right and centre.

During El Niño, warm water and high sea levels shift eastward, leaving in their wake low sea levels in the western Pacific (see picture of exposed reefs in Guam).

If the new NASA research proves correct - and there is good evidence to suggest it is - continental ice is increasing and lowering sea level.

7:00 no sea level rise in La Jolla, CA 12:00 Topex / Poseidon Satellite measurements are crude 12:43 ENVISAT, European satellite with higher resolution, much lower sea level rise, decrease since 2010

This AD pattern quickly shifted in the second half of June 2012, however, and was replaced by a more typical low sea level pressure center over the Arctic Ocean.

Closed contours over the Pacific Arctic support a continued low sea level pressure in that region, similar to Figure 9, which is not supportive of rapid sea ice loss.

«The abrupt climate changes did not take place at the extreme low sea levels, corresponding to the time of maximum glaciations 20,000 years ago, or at high sea levels such as those prevailing today.

Scientists: Warming causes Antarctic ice sheet growth, and lower sea levels By Kenneth Richard While many scientists are projecting rapid sea level rise as a result of a warmer Antarctica and consequent ice sheet melting, other scientists are projecting that the surface of the Antarctic ice sheet will gain in mass because a warmer Antarctica means snow and ice accumulation will outpace the -LSB-...]

In the paleo context 300 ppm is not high, which is why we have Ice Ages and lower sea levels now, and didn't for most of the last 100 million years when CO2 levels have been higher.

This change in rainfall is the culprit for the lowering sea level:

new human - made impoundments or in groundwater fed by such impoundments will lower sea level.

This AD pattern quickly shifted in the second half of June, however, and was replaced by a low sea level pressure center over the Pacific side of the Arctic Ocean (Figure 3b), opposing the transpolar sea ice drift.

Depending on the exact stresses in the shelf it could even lower the sea level by a millimeter.

While the DA was replaced by low sea level pressure (SLP) over the Arctic Ocean in July, high pressure returned over the Beaufort Sea in August coupled with low pressure over Siberia, helping to compress ice towards the pole and bring warm air into the Arctic.

In July, the Arctic Dipole Anomaly (DA) pattern that was dominant in June (which promotes clear skies, warm air temperatures, and winds that push ice away from coastal areas and encourages melt) was replaced by low sea level pressure (SLP) over the Arctic Ocean, leading to ice divergence (ice extent «spreading out») and cooler temperatures.

This is an increase of 1 million square kilometers from the July Outlook, reflecting the persistence of low sea level pressure (SLP) over the central Arctic that resulted in ice divergence and a more fractured ice cover.

As discussed in the July Outlook, low sea level pressure (SLP) dominated the Arctic Ocean in July, leading to ice divergence and cooler temperatures that helped to slow the fast pace of ice loss observed in May and June.

However, during the second half of July, ice loss slowed substantially as the high pressure over the central Arctic and Beaufort Sea was replaced by low sea level pressure (Figure 3).

Not exact matches

The sea is likely to rise steadily up to a level well above the normal tide, with damaging waves and flooding of some low - lying but g areas, which could also extend some way inland,» the Bureau of Meteorology said.

That half a degree is the difference between low - lying island states surviving, or Arctic ice remaining over the North Pole in summer, or increasing the risk of losing the Western Antarctic Ice Sheet or Greenland ice sheet (either one of which implies an eight - metre sea level rise.)

Inadequate flood protection infrastructure, which right now might not contain high tides in El Nino years; Lack of action on annual sediment removal from spring freshets, which each year move over 30 million m3 of sediment and leave about 3 million m3 of silt in the navigation and secondary channels of the lower reaches; and, By the end of this century sea levels at the mouth of the river could potentially rise more than one meter due to climate change overtopping the diking system.