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17 de mar. de 2023 · The average global sea level rose by 0.11 inches (0.27 centimeters) from 2021 to 2022, according to a NASA analysis of satellite data. That’s the equivalent of adding water from a million Olympic-size swimming pools to the ocean every day for a year and is part of a multidecade trend of rising seas.
This Sea Level Rise Technical Report provides the most up-to-date sea level rise projections available for all U.S. states and territories; decision makers will look to it for information. This multi-agency effort, representing the first update since 2017, offers projections out to the year 2150 and information to help communities assess potential changes in average tide heights and height ...
In coastal areas, sea level variations are superimposed on the vertical land motion (either subsidence [2] or uplift) and threaten ecosystems and communities. Long-term sea level rise is expected to aggravate coastal erosion, coastal flooding, and saltwater intrusion into coastal aquifers [3].
Long-term changes in global mean sea level (GMSL) are predominantly driven by three processes: Ice Melt: Due to the warming atmosphere and ocean, ice sheets and mountain glaciers are melting, resulting in the addition of fresh water into the ocean. Thermal Expansion: Ocean water expands as it absorbs trapped heat, causing sea levels to rise.
Data from the Sea Level Rise Viewer were used to create an interactive map that shows how areas vulnerable to flooding today were often marshlands in 1863. A collaboration of NOAA’s Office for Coastal Management and the King Tides Project to help people understand the global impact of sea level rise.
Sea level rise is an increase in the ocean’s surface height relative to the land in a particular location. The expansion of warm ocean water and melting polar ice are the primary causes of today’s rising sea levels. Both factors are the result of increasing human greenhouse gas emissions driving Earth’s temperatures higher.
Podcast: 2022 Sea Level Rise Technical Report. In this episode, we talk with two members of the Federal Sea Level Rise Task Force about the new Sea Level Rise Technical Report, released in 2022. Science-based tools allow people to make informed decisions given the sea level changes we are seeing now and predict in the future.
