Sentences with phrase «tide gauge records»

You can see that over more than 80 years of tide gauge records there is an extremely clear correlation between solar activity and sea level rise - active sun, the oceans rise.

Are long tide gauge records in the wrong place to measure global mean sea level rise?

Local sea level change, which is what really matters, is more directly and more effectively estimated from tide gauge records than from satellites.

Why use individual tide gauge records when we have perfectly good combinations, from much larger samples, which give a global picture of sea level change and show vastly less noise?

Global mean sea level is measured using tide gauge records and also, since 1993, satellite data.

This is a global data set, and it's a worldwide average so its shows vastly less noise than individual tide gauge records.

This task involved extensive time series analysis that identified Singular Spectrum Analysis (SSA) as an optimal analytic for resolving estimates of mean sea level from long tide gauge records with improved accuracy and temporal resolution, since it provides a superior capability to separate key time varying harmonic components of the time series.

Titus cites four 20th century tide gauge records for which NOAA has calculated long - term SLR rates ranging from 1.3 - 2.4 mm / year.

For example, similar rates were observed in tide gauge records during the period 1920 — 1950 (Jevrejeva et al., 2006) and in decadal mean rates in the 1950s and 1970s (Church and White, 2006), and even a rate of 5.3 mm · yr − 1 centred on the 1980s by Holgate (2007).

This is achieved through the study of three independent records, the net heat flux into the oceans over 5 decades, the sea - level change rate based on tide gauge records over the 20th century, and the sea - surface temperature variations.

«Our analyses do not indicate acceleration in sea level in U.S. tide gauge records during the 20th century,» the study's authors concluded.

Corresponding low sea levels are recorded by early tide gauge records in The Netherlands and Germany.

Looking at global data (rather than tide gauge records just from the U.S.) show that sea level rise has been increasing since 1880.

We know that sea levels are increasing thanks to the satellite observations, collated by NASA's Goddard Space Flight Center, as well as coastal tide gauge records monitored by Australia's leading science body, the CSIRO.

Some studies have attempted to estimate the statistical relationship between temperature and global sea level seen in the period for which tide gauge records exist (the last 2 - 3 centuries) and then, using geological reconstructions of past temperature changes, extrapolate backward («hindcast») past sea - level changes.

The 52 locations, from Portland, ME, to Freeport, Texas, were selected because the National Weather Service issues flood advisories based on local tide gauge recordings there.

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.

Using around 500 tide gauge records globally, it's the latest version of the «Church & White» dataset.

It is applied to six secular - long tide gauge records representative of the world oceans: Sydney, Pacific coast of Australia; Fremantle, Indian Ocean coast of Australia; New York City, Atlantic coast of USA; Honolulu, US state of Hawaii; San Diego, US state of California; and Venice, Mediterranean Sea, Italy.

At the secular time scales tide gauge records present relatively small (positive or negative) accelerations, as found in other studies (Houston and Dean in J Coast Res 27:409 — 417, 2011).

A long time - scale is needed because significant multidecadal variability appears in numerous tide gauge records during the 20th century.

Analysis of long - term tide gauge records along the North American east coast identified an extreme sea - level rise event during 2009 — 2010.

Based on a small number (~ 25) of high - quality tide gauge records from stable land regions, the rate of sea level rise has been estimated as 1.8 mm yr — 1 for the past 70 years (Douglas, 2001; Peltier, 2001), and Miller and Douglas (2004) find a range of 1.5 to 2.0 mm yr — 1 for the 20th century from 9 stable tide gauge sites.

Why do they use tide gauge records from just U.S. stations?

Second, by using individual tide gauge records, the noise level is so high that you can't really hope to find acceleration or deceleration of any kind, with any consistency.