sealevelTuktoyaktuk {oce} | R Documentation

## Sea-level data set acquired in 1975 at Tuktoyaktuk

### Description

This sea-level dataset is provided with in Appendix 7.2 of Foreman (1977) and also with the `T_TIDE` package (Pawlowicz et al., 2002). It results from measurements made in 1975 at Tuktoyaktuk, Northwest Territories, Canada.

The data set contains 1584 points, some of which have NA for sea-level height.

Although Foreman's Appendix 7.2 states that times are in Mountain standard time, the timezone is set to `UTC` in the present case, so that the results will be similar to those he provides in his Appendix 7.3.

### Usage

    data(sealevelTuktoyaktuk)

### Source

The data were based on the `T_TIDE` dataset, which in turn seems to be based on Appendix 7.2 of Foreman (1977). Minor editing was on file format, and then the `sealevelTuktoyaktuk` object was created using `as.sealevel`.

### References

Foreman, M. G. G., 1977. Manual for tidal heights analysis and prediction. Pacific Marine Science Report 77-10, Institute of Ocean Sciences, Patricia Bay, Sidney, BC, 58pp.

Pawlowicz, Rich, Bob Beardsley, and Steve Lentz, 2002. Classical tidal harmonic analysis including error estimates in MATLAB using `T_TIDE`. Computers and Geosciences, 28, 929-937.

### See Also

The documentation for `sealevel-class` explains the structure of `sealevel` objects, and also outlines the other functions dealing with them. Data for Halifax harbour are stored in `sealevel`.

### Examples

    ## Not run:
    library(oce)
    data(sealevelTuktoyaktuk)
    time <- sealevelTuktoyaktuk[["time"]]
    elevation <- sealevelTuktoyaktuk[["elevation"]]
    oce.plot.ts(time, elevation, type='l', ylab="Height [m]", ylim=c(-2,6))
    legend("topleft", legend=c("Tuktoyaktuk (1975)","Detided"),
           col=c("black","red"),lwd=1)
    tide <- tidem(sealevelTuktoyaktuk)
    detided <- elevation - predict(tide)
    lines(time, detided, col="red")

    ## End(Not run)

[Package oce version 0.9-18 Index]