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My top 3 impressions up-front: The sealevel projections for the year 2100 have been adjusted upwards again. The IPCC gives more consideration to the large long-term sea-level rise beyond the year 2100. And here is the key sea-level graphic from the Summary for Policy Makers: Source: IPCC AR6, Figure SPM.8.
Flooding, coastalerosion, wildfires, thawing permafrost, and extreme weather events are causing unprecedented loss and damage of places and customs. Sealevel rise, coastal flooding and erosion due to more extreme storms have drastically affected traditional food gardens and plantations, and damaged coconut groves.
The case of Tangier is a prime example of the consequences of continued sealevel rise and human displacement due to the climate crisis. Continued sealevel rise is one of the most serious consequences of the climate crisis, according to the latest IPCC Assessment Report.
The global mean sealevel has increased by 20 cm from 1901 to 2018, and the rate of increase has accelerated and is now about 3.7 A thermal expansion explained 50% of sealevel rise during 1971–2018, while ice loss from glaciers contributed 22%, ice sheets 20% and changes in land water storage 8%. mm increase every year.
Rising sealevels and increased intensity of storm surges are playing a considerable role in the degradation of coastal regions in the Pacific Islands. Illustrating the variation in sealevels from 1993 – 2018. Coastalerosion is occurring at an alarming rate within the Pacific Islands.
Some of those predicted changes are already happening such as continued sealevel rise which is now irreversible over a time span of hundreds to thousands of years. And by the end of this century, extreme sea-level events which previously occurred every 100 years could happen every year.
In many places, sand is being used faster than it can be replenished, and is often extracted causing severe damage to biodiversity, fishing grounds, coastal and beach stability, and an erosion of beaches and riverbeds.
SIDS face a range of risks, including extreme floods, storms, droughts, unpredictability of precipitation patterns and sea-level rise, ocean acidification and deoxygenation (World Health Organization, 2018; Douglas & Cooper, 2020, Thomas, 2020).
From coastalerosion to pollution, NOS’s science helps states and communities manage these resources sustainably. OAR also monitors the Arctic’s rapidly changing environment, as it significantly influences global weather patterns and sealevels.
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