Wind speed data for shore and forest on an island in French Polynesia

Data were collected at 12 heights above the substratum from 5 mm to 0.68 m, covering the height range which hermit crabs would likely capture odors. Wind speeds were sampled at data were taken for three-minute intervals and sampled at 100 Hz. Measurements were repeated three times (on three different days) and averaged for each position above the substratum.

Turbulence intensity was calcuated by dividing the standard deviation of wind speed in the sample by the mean speed of the sample. Statistics were performed with R and values are reported with standard error. Mean_vel.pdf reports wind speeds (in meters per second) graphed against height above substratum (in meters).

Red dots indicate the "forest" location and blue dots indicate "shore" location. In a linear regression model (speed~height*location), there is a significant correlation between speed and height above substratum (slope = 0.18 ±0.04, t-value = 4.477, dof = 20, p = 2e-4) but only a slight correlation between speed and location (coef = 0.0506 ±0.02, t-value = 2.252, dof = 20, p = 0.03). turbint_regression.pdf reports turbulence intensities graphed against height above substratum (in meters).

In a linear regression model (turbulence intensity~height*location), turbulence intensity has a significant correlation with height above substratum (slope = 0.0845 ±0.01, t-value = 5.712, dof = 20, p = 1e-5) but no relationship with location (coef = -0.00851 ±0.008, t-value = -1.07, dof = 20, p = 0.30).