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|a Spatial variability of late Holocene and 20th century sea-level rise along the Atlantic coast of the United States |h [electronic resource] |y English. |
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|a [S.l.] : |b Geological Society of America, |c 2009. |
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|a Please contact the owning institution for licensing and permissions. It is the user's responsibility to ensure use does not violate any third party rights. |
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|a Accurate estimates of global sea-level rise in the pre-satellite era provide a context for 21st
century sea-level predictions, but the use of tide-gauge records is complicated by the contributions
from changes in land level due to glacial isostatic adjustment (GIA). We have constructed
a rigorous quality-controlled database of late Holocene sea-level indices from the U.S.
Atlantic coast, exhibiting subsidence rates of <0.8 mm a–1 in Maine, increasing to rates of 1.7
mm a–1 in Delaware, and a return to rates <0.9 mm a–1 in the Carolinas. This pattern can be
attributed to ongoing GIA due to the demise of the Laurentide Ice Sheet. Our data allow us
to defi ne the geometry of the associated collapsing proglacial forebulge with a level of resolution
unmatched by any other currently available method. The corresponding rates of relative
sea-level rise serve as background rates on which future sea-level rise must be superimposed.
We further employ the geological data to remove the GIA component from tide-gauge records
to estimate a mean 20th century sea-level rise rate for the U.S. Atlantic coast of 1.8 ± 0.2 mm
a–1, similar to the global average. However, we fi nd a distinct spatial trend in the rate of 20th
century sea-level rise, increasing from Maine to South Carolina. This is the fi rst evidence of
this phenomenon from observational data alone. We suggest this may be related to the melting
of the Greenland ice sheet and/or ocean steric effects. |
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|a Electronic reproduction. |c Florida International University, |d 2015. |f (dpSobek) |n Mode of access: World Wide Web. |n System requirements: Internet connectivity; Web browser software. |
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|a Atlantic Coast (U.S.). |
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|a Tornqvist, Torbjorn E.. |
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|t patial variability of late Holocene and 20th century sea-level rise along the Atlantic coast of the United States |
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|a dpSobek |c Sea Level Rise |
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|u http://dpanther.fiu.edu/dpService/dpPurlService/purl/FI15061984/00001 |y Click here for full text |
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|3 Host material |u http://www.tulane.edu/~tor/documents/Geology2009.pdf |y patial variability of late Holocene and 20th century sea-level rise along the Atlantic coast of the United States |
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|a http://dpanther.fiu.edu/sobek/content/FI/15/06/19/84/00001/FI15061984thm.jpg |
