We will also find that there are a number of serious problems with
the available sea level data.
Not exact matches
Using the Great Barrier Reef as their study case, they estimated the evolution of the region over the last 14,000 years and showed that (1) high sediment loads from catchments erosion prevented coral growth during the early phase of
sea level rise and favoured deep offshore sediment deposition; (2) how the fine balance between climate,
sea level, and margin physiography enabled coral reefs to thrive under limited shelf sedimentation rates at 6,000 years before present; and, (3) how over the last 3,000 years, the decrease of accommodation space led to the lateral extension of coral reefs consistent with
available observational
data.
The study, published in Nature Communications uses newly
available data and advanced models to improve global predictions when it comes to extreme
sea levels.
In a second step, we apply the method to reconstructing 2 - D
sea level data over 1950 — 2003, combining sparse tide gauge records
available since 1950, with EOF spatial patterns from different sources: (1) thermosteric
sea level grids over 1955 — 2003, (2)
sea level grids from Topex / Poseidon satellite altimetry over 1993 — 2003, and (3) dynamic height grids from the SODA reanalysis over 1958 — 2001.
For that purpose we use global grids of thermosteric
sea level data,
available over 1950 — 2003.
Satellite observations
available since the early 1990s provide more accurate
sea level data with nearly global coverage.
The University of Colorado
Sea Level Research Group updated their
data in July, but oddly enough the new
data was only
available through mid-April.
Recently, the 2010 global temperature and satellite
sea level data have become
available.
Long running
sea level data is
available at two sites in the UK, North Shields in the North East, and Newlyn in the South West.
There is a total absence of
data supporting the notion of a present
sea level rise; on the contrary all
available facts indicate present
sea level stability.
The product covers the
sea and ice areas polewards of latitudes 50N and 50S with 3 - minute
data segments in
Level 2, with
data processed and archived continuously throughout the day, as they become
available (approximately 110 3 - minute segments per day per hemisphere).
Let's wait until more
sea level data is
available; to compute a
sea level change directly is hopeless.
They had evaluated all
available data on
sea level rise and also made allowance for water held in storage by all reservoirs built since 1900.
Bill Innis: Jevrejeva's most recent tide gauge
data from 2003 to 2009 shows
sea level is actually falling The
data will likely become
available soon.
What it means Although some regions have recently experienced much greater rates of
sea level rise, such as the Arctic (3.6 mm / yr) and Antarctic (4.1 mm / yr), with the mid-1980s even exhibiting a rate of 5.3 mm / yr (Holgate, 2007), this newest analysis of the most comprehensive
data set
available suggests that there has been no dramatic increase — or any increase, for that matter — in the mean rate of global
sea level rise due to the historical increase in the atmosphere's CO2 concentration.
The statement is for acceleration in
sea level rise regardless of sparse
data and other unknowns and
available data.
Different approaches have been used to compute the mean rate of 20th century global mean
sea level (GMSL) rise from the
available tide gauge
data: computing average rates from only very long, nearly continuous records; using more numerous but shorter records and filters to separate nonlinear trends from decadal - scale quasi-periodic variability; neural network methods; computing regional
sea level for specific basins then averaging; or projecting tide gauge records onto empirical orthogonal functions (EOFs) computed from modern altimetry or EOFs from ocean models.
I concluded that the projections of extreme
sea level rise are not consistent with plausible physical mechanisms, not supported by the
available data, and further, that the AR4 projected range (about 30 - 50 cm by 2100) agreed perfectly with my projections over a wide range of warming scenarios.
Satellite altimetry observations,
available since the early 1990s, provide more accurate
sea level data with nearly global coverage and indicate that since 1993
sea level has been rising at a rate of about 3 millimeters per year.
It is also possible, as your presentation suggests, that our ability to determine
sea level rise globally is so distorted by local variations that the
data now
available to climate scientists like yourself is all but meaningless.»