santabarbara {ridgetorus}

Santa Barbara currents

Description

The Santa Barbara Channel is a coastal area in California. This dataset contains the sea currents in the four areas present in the data application in García-Portugués and Prieto-Tirado (2022). Precisely, it contains the 24-hour speed-weighted mean of the currents' direction in each of the four areas downloaded from the NOAA High Frequency Radar National Server.

Usage

santabarbara

Format

A data frame with 1092 rows and 4 variables:

A

Sea current direction at zone A.

B

Sea current direction at zone B.

C

Sea current direction at zone C.

D

Sea current direction at zone D.

Details

The selection of these four areas is motivated by previous studies on the Santa Barbara currents, like Auad et al. (1998). The direction is measured in radians in [-\pi, \pi) with -\pi / -\frac{\pi}{2} / 0 / \frac{\pi}{2} / \pi representing the East / South / West / North / East directions. The script performing the data preprocessing is available at data-acquisition.R. The data was retrieved on 2022-10-21.

References

Auad, G., Hendershott, M. C., and Winant, C. D. (1998). Wind-induced currents and bottom-trapped waves in the Santa Barbara Channel. Journal of Physical Oceanography, 28(1):85–102. doi:10.1175/1520-0485(1998)028<0085:WICABT>2.0.CO;2

García-Portugués, E. and Prieto-Tirado, A. (2023). Toroidal PCA via density ridges. Statistics and Computing, 33(5):107. doi:10.1007/s11222-023-10273-9

Examples

# Load data
data("santabarbara")
AB_zone <- santabarbara[c("A","B")]


# Perform TR-PCA
fit <- ridge_pca(x = AB_zone)
show_ridge_pca(fit)