1840000 Chuuk, Pacific Ocean

Warning! Javascript is disabled, or your web browser
is incompatible with Google Charts, so this page won't
display correctly. Try Google Chrome or Mozilla Firefox.

The mean sea level (MSL) trend at Chuuk, Pacific Ocean is (?.??) mm/year with a 95% confidence interval of ±(?.??) mm/year, based on monthly mean sea level data from (19xx) to (20xx). That is equivalent to a change of (?.??) feet in 100 years. (R‑squared = (?))

The plot shows the monthly mean sea level without the regular seasonal fluctuations due to coastal ocean temperatures, salinities, winds, atmospheric pressures, and ocean currents. The long-term linear trend is also shown, in red, along with its 95% confidence interval. The plotted values are relative to the most recent Mean Sea Level datum established by NOAA CO-OPS.

Options

Show calculated linear trend (linear regression)
Show linear trend 95% confidence intervals
Show linear trend 95% prediction intervals
Show quadratic regression
Show quadratic trend 95% confidence intervals†
Show quadratic trend 95% prediction intervals†
Show NOAA's linear trend
Show NOAA's linear trend 95% confidence intervals
Show CO2 levels
Boxcar smoothing: Enable Width: Repeat:
Line weight: thin medium thick color scheme:

Graph from:	start date	thru end date
Calculate using:	start date	thru end date
Show MSL from:	start date	thru end date

Data source: NOAA PSMSL NOAA,PSMSL PSMSL,NOAA

To change the graph width, resize your browser window and then click:

Data source: ? months from NOAA + ? months from PSMSL.

Click here for a downloadable, bookmarkable image (except in Internet Explorer or Microsoft Edge, use PrtScn, or see NOAA's version, or PSMSL's version.)

For a simple explanation of the meaning of the 95% confidence & prediction interval traces shown in the graph, see this two-minute instructional video, by Dr. Gerard Verschuuren.

Linear:
y = B + M·x
y = B + M·x mm

Quadratic:
y = B' + M·x + A·x²
y = B + M·x + A·x² mm

where:
Date range = (1935) to (2015)
x = (date - avg(date)) (date)
slope = M = ± mm/yr
acceleration = 2·A = 2×A = ± mm/yr²

To see precise values, hover your mouse cursor over the graph traces (or touch the graph on a touch-screen).

To download the seasonally-adjusted monthly MSL data from NOAA, in CSV format, click here.

We also have a graph of just carbon dioxide (CO₂) levels, and a combined graph of CO₂ and CH₄.

†Preliminary