February 28, 2007
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FROM VOLUME 5, NUMBER 1, JANUARY 1992
SEA LEVEL POLICY AND SCIENCE
"Local Government and Public Adaptation to Sea Level Rise," R.J.
Burby (Ctr. Urban Studies, Univ. North Carolina, Chapel Hill NC 27499), A.C.
Nelson, J. Urban Planning & Develop.--ASCE, 117(4), 140-153,
Discusses the predictions of accelerated sea level rise, the range of
possible policy responses, the extent to which local governments and the public
perceive and respond to threats of sea level rise, and the need for research
into the factors determining cognition and response.
"Man, Water and Global Sea Level," B.F. Chao (NASA-Goddard,
Greenbelt MD 20771), Eos, p. 492, Nov. 5, 1991. Presents a brief,
documented argument that management of water resources (impoundments,
irrigation, etc.) has had an appreciable impact on sea level, contributing to a
decrease estimated at 0.7 mm/yr.
"Global Sea Level Rise," B.C. Douglas (Nat. Ocean Serv., NOAA,
Rockville MD 20852), J. Geophys. Res., 96(C4), 6981-6992, Apr.
The scatter in published values for long-term, global sea level rise results
not from instrument error but from using data taken near convergent tectonic
plate boundaries, and from varying effects of post-glacial rebound. By avoiding
the former cases and removing the latter effect through modeling, a consistent
estimate of sea level rise over the period 1880-1980 of 1.8 mm/yr ± 0.1 was
obtained. Results provide confidence that carefully selected records show the
same long-term trend, and that many old tide gauge records are of high quality.
"A Model of Sea Level Rise Caused by Ocean Thermal Expansion,"
J.A. Church (CSIRO Div. Oceanog., GPO Box 1538, Hobart, TAS 7001, Australia),
J.S. Godfrey et al., J. Clim., 4(4), 438-456, Apr. 1991.
The model is based on a mechanism in which heat enters the ocean by an
advection process, rather than by vertical diffusion, as in previous estimates
of thermal expansion. For a global mean 3.0° C temperature rise by the
year 2050, it estimates sea level rise by thermal expansion of 0.2-0.3 m, or
about 0.35 m when melting of the cryosphere is included.
"Interannual Coherence between North Atlantic Atmospheric Surface
Pressure and Composite Southern U.S.A. Sea Level," G.A. Maul (Atlantic
Lab., NOAA, 4301 Rickenbacker Causeway, Miami FL 33149), K. Hanson, Geophys.
Res. Lett., 18(4), 653-656, Apr. 1991.
Prompted by recent interest in detecting anthropogenic signals in sea level
trends, the authors examined the interannual component of annual mean sea level
data from 15 stations, to determine links to atmospheric fluctuations as a basis
for reducing variance. The best correlation was negative between composite sea
level and wintertime air pressure north of 45° N, but positive from
20° N to 45° N.
"Earthquakes and Sea Level: Space and Terrestrial Metrology on a
Changing Planet," R. Bilham (CIRES, Univ. Colorado, Boulder CO 80309), Rev.
Geophys., 29(1), 1-29, Feb. 1991.
Summarizes several measuring techniques developed in the past two decades
that offer great improvement in the ability to measure sea level rise and
changing volume of glacial ice, in addition to crustal deformations associated
with earthquakes. They include VBLI (very long baseline interferometry), SLR
(satellite laser ranging), and GPS (global positioning system).
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