Global climate changes recorded in coastal wetland sediments: Empirical observations linked to theoretical predictions

Details Global climate changes recorded in coastal wetland sediments: Empirical observations linked to theoretical predictions Global climate changes recorded in coastal wetland sediments: Empirical observations linked to theoretical predictions

Jul 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010georl..3714706k&link_type=abstract

Geophysical Research Letters, Volume 37, Issue 14, CiteID L14706

Other

Global Change: Sea Level Change (1222, 1225, 4556), Oceanography: General: Coastal Processes, Global Change: Impacts Of Global Change (1225), Hydrology: Geomorphology: General (1625), Geochronology: Sedimentary Geochronology

Scientific paper

Whether coastal areas are experiencing, and responding to, an accelerated rate of global sea-level rise (GSLR) is critically important for the ˜2 billion people living near Earth's oceans. Accretion rates from a suite of physiographically diverse coastal wetlands surrounding Long Island, NY accelerated during the 20th century at 2.3 ± 0.2 × 10-2 mm yr-2, which is comparable to reported rates of GSLR acceleration and global temperature changes. Wetlands varied in tidal range, salinity and geomorphic setting, and were located in embayments with limited human impacts in a region with limited and constant rates of subsidence. From geochronologies with temporal resolutions of 2-5 yr, we constructed new composite histories of sediment accretion and mineral deposition. Wetland dynamics are consistent with predictions from sedimentology and a numerical model of ecogeomorphic response, suggesting that these systems, and likely others worldwide, are responding to accelerated GSLR and related climatic changes.

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