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Potential impact of sea-level rise on Bangladesh Potential impact of sea-level rise on Bangladesh
Bangladesh, one of the world's poorest nations is also the country most vulnerable to sea-level rise. The population is already severely affected by storm surges. Catastrophic events in the past have caused damage up to 100 km inland. It is hard to imagine to what extent these catastrophes would be with accelerated sea-level rise. Digital terrain modelling techniques have been used to display the Bangladesh scenarios. A three dimensional view o...
12 Feb 2006 - by Philippe Rekacewicz, UNEP/GRID-Arendal
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Antarctica, showing rates of surface-elevation change derived from satellite radar-altimeter measurements Antarctica, showing rates of surface-elevation change derived from satellite radar-altimeter measurements
The figure shows rates at which the ice-sheet mass was estimated to be changing based on radar-altimeter data (black), mass-budget calculations (red), and satellite gravity measurements (blue). Rectangles depict the time periods of observations (horizontal) and the upper and lower estimates of mass balance (vertical). Measurements by satellite techniques based on gravity indicate mass loss at a rate of 138 ± 73 billion tonnes per year during 200...
01 Jun 2007 - by Hugo Ahlenius, UNEP/GRID-Arendal
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Projected sea-level rise for the 21st century Projected sea-level rise for the 21st century
The projected range of global averaged sea-level rise from the IPCC 2001 Assessment Report for the period 1990 to 2100 is shown by the lines and shading. The updated AR4 IPCC projections made are shown by the bars plotted at 2095, the dark blue bar is the range of model projections (90% confidence limits) and the light blue bar has the upper range extended to allow for the potential but poorly quantified additional contribution from a dynamic res...
01 Jun 2007 - by Hugo Ahlenius, UNEP/GRID-Arendal
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Effects of sea-level rise on water resources of small islands and low-lying coastal areas Effects of sea-level rise on water resources of small islands and low-lying coastal areas
The water resources of small islands and low-lying coastal areas are very susceptible to sea-level rise. This figure illustrates the direct impacts on the water resources sector, as well as the plethora of higher-order impacts which affect not only that sector but most, if not all, other sectors including health, transport and agriculture.
01 Jun 2007 - by Hugo Ahlenius, UNEP/GRID-Arendal
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Population, area and economy affected by a 1 m sea level rise (global and regional estimates, based on today's situation) Population, area and economy affected by a 1 m sea level rise (global and regional estimates, based on today's situation)
Even for today’s socio-economic conditions, both regionally and globally, large numbers of people and significant economic activity are exposed to sea-level rise. The densely populated megadeltas are especially vulnerable to sea-level rise. More than 1 million people living in the Ganges- Brahmaputra, Mekong and Nile deltas will be directly affected simply if current rates of sea-level rise continue to 2050 and there is no adaptation. More than 5...
01 Jun 2007 - by Hugo Ahlenius, UNEP/GRID-Arendal
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Global Sea-level Rise Global Sea-level Rise
The loss of ice from the Greenland Ice Sheet has increased and will contribute substantially to global sea level rise.
27 Oct 2009 - by Riccardo Pravettoni, UNEP/GRID-Arendal
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Average sea level 1900-2009 Average sea level 1900-2009
Sea-level rise is accelerating.
27 Oct 2009 - by Laura Margueritte
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Sea level rise caused by the melting of mountain and subpolar glaciers Sea level rise caused by the melting of mountain and subpolar glaciers
Another process that results in rising sea levels is the addition of water mass from land ice. Melting glaciers and ice caps, as well as the vast ice sheets of Greenland and Antarctica, raise sea-levels if their water mass enters the ocean as melted water or icebergs (Pritchard et al. 2009, Steig et al. 2009, Velicogna 2009). Furthermore, it is estimated that melting of tropical glaciers (most of them are considered small) could cause an increas...
22 Nov 2010 - by Viktor Novikov, UNEP/GRID-Arendal
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Change in sea level as a result of changes in ocean density and circulation Change in sea level as a result of changes in ocean density and circulation
Changes in sea levels resulting exclusively from changes in ocean density and circulation patterns, results of atmosphere-ocean general circulation models (AOGCM) for climate change scenario A1B (this scenario assumes future rapid demographic and economic growth, introduction of new and more efficient technologies, accompanied by a balanced use of all types of energy sources) show that there will be significant spatial variability, i.e., changes ...
01 Oct 2010 - by Nieves López Izquierdo, Associate Consultant UNEP/GRID-Arendal
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Changes to Coconut Beach (Dominica) after the 1995 hurricane season Changes to Coconut Beach (Dominica) after the 1995 hurricane season
During a period between May 1994 to September 1995 the profile of the beach dramatically changed. A rising sea level combined with more storms, washed away vulnerable beaches. With the sand gone, the coast is more vulnerable to waves going further inland, threatening fresh water wells with salinisation, leading to land erosion, and making the areas less attractive for tourism. When a beach starts to deteriorate, the process can be amazingly quick...
17 May 2005 - by Viktor Novikov, UNEP/GRID-Arendal
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Nile Delta: Potential Impact of Sea Level Rise Nile Delta: Potential Impact of Sea Level Rise
The potential impacts of sea level rise on the Nile Delta are expected to include a decline in water quality that would affect freshwater fish, the flooding of agricultural land and damage to infrastructure. This graphic shows the Nile Delta region as it is today (2002), the area as it would appear with a 0.5 m sea level rise, and the area as it would appear with a 1.0 m sea level rise.
17 May 2005 - by Otto Simonett, UNEP/GRID-Arendal
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Time scales and sea level rise Time scales and sea level rise
No data.
28 Mar 2006 - by Bounford.com and UNEP/GRID-Arendal
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Sea level rise and assessment of the state of the marine environment Sea level rise and assessment of the state of the marine environment
A significant sea level rise is one of the major anticipated consequences of climate change. This will cause some low-lying coastal areas to become completely submerged, while others will increasingly face short-lived high-water levels. These anticipated changes could have a major impact on the lives of coastal populations. The small island developing states (SIDS) will be especially vulnerable to the effects of sea level rise, and to changes in ...
01 Oct 2009 - by Philippe Rekacewicz
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Impact of sea level rise in Bangladesh Impact of sea level rise in Bangladesh
Impact of sea level rise in Bangladesh. three maps in a time relapse resulting in 18 million people affected, 22,000 km2 of land submerged by flooding.
26 Jan 2009 - by Phillipe Rekacewicz, February 2008
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Impact of sea level rise on the Nile delta Impact of sea level rise on the Nile delta
Impact of sea level rise on the Nile delta. Sea level elevation model used to produce impact of nile delta sea level rise.
26 Jan 2009 - by Phillipe Rekacewicz, Otto Simonett - February 2008
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Sea Level Anomalies Sea Level Anomalies
Melting and warming will have consequences on ocean circulation. Additionally melting of inland glaciers and continental ice sheets on Greenland and Antarctica, and the thermal expansion of ocean waters are causing sea level rise.
06 Oct 2009 - by Riccardo Pravettoni, UNEP/GRID-Arendal
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Global sea-level rise Global sea-level rise
According to the 2007 IPCC report, global average sea level rise will vary from 18 cm to 59 cm by 2100. The IPCC models did not account for the accelerated melting of ice sheets in Greenland and Antarctica. Some of the latest research, however, estimates a global sea level rise of between 0.6 and 1.2 metres by 2100.
01 Oct 2010 - by Riccardo Pravettoni, UNEP/GRID-Arendal
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