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Module 2: Tides in the Puget Sound

Learning Objectives

I. Tidal Movement

II. Tidal Cycle and Connection to Sea Surface Elevation

Let's take a closer look at the movement of tides through the Strait of Juan de Fuca. We'll be using the tidal stations at Neah Bay, Port Angeles, and Port Townsend. Their tidal data and locations can be found at NOAA Tides and Currents webpage.

Below, we plotted the locations of the three tidal stations in the Strait of Juan de Fuca.

From west to east: Neah Bay, Port Angeles, and Port Townsend.



In [1]:

    
import tydal.module2_utils as tide
import tydal.quiz2



In [2]:

    
stationmap = tide.add_station_maps()
stationmap

As the tide moves through the Strait, it creates a change in the elevation of the water surface. Below we'll cycle through a tidal cycle and look at how the tide moves through the Strait. Use the slider to move through the time series and look how the measured tide at a station relates to the other stations, and its effect on the water elevation.



In [3]:

    
NeahBay = tide.load_Neah_Bay('Data/')
PortAngeles = tide.load_Port_Angeles('Data/')
PortTownsend = tide.load_Port_Townsend('Data/')



In [4]:

    
Tides = tide.create_tide_dataset(NeahBay,PortAngeles,PortTownsend)



In [5]:

    
%matplotlib inline
tide.plot_tide_data(Tides,'2016-10-01','2016-10-02')

Take a look at the time series for each station. It looks like a wave. In fact, the tide is a wave. That wave propogates through the Strait, starting at Neah Bay and travelling to Port Townsend. This is reflected in the elevation, as the peak elevation moves from one station to the following station.

# Module 2 Quiz



In [ ]:

    
quiz2.quiz()