**figure_style_kws)
top.line('day', 'S', source=source,
line_color=colors[0], line_width=3, line_cap='round')
top.y_range = Range1d(0., 40.)
top.yaxis.axis_label = "Salinity (g/kg)"
top.xaxis.axis_label_text_font_size = label_fontsize
top.yaxis.axis_label_text_font_size = label_fontsize
# overlay volume level chart to salinity
tc = "MediumBlue" # tide color
tide_range = Range1d(start=0, end=15)
tide_axis = LinearAxis(y_range_name="Z")
tide_axis.axis_label = "Tidal Height (m)"
tide_axis.axis_label_text_color = tc
tide_axis.axis_label_text_font_size = label_fontsize
tide_axis.major_tick_line_color = tc
tide_axis.major_label_text_color = tc
tide_axis.minor_tick_line_alpha = 0.
top.extra_y_ranges = {"Z": tide_range}
# top.line('day', 'Z', source=source,
# line_color=tc, line_width=2, line_cap='round')
top.add_layout(tide_axis, "right")
top.line('day', 'Z', source=source,
line_color=tc, line_width=2, line_cap='round',
y_range_name="Z")
mid = Figure(title=None, x_range=top.x_range,
toolbar_location=None, **figure_style_kws)
mid.line('day', 'N', source=source,
line_color=colors[1], line_width=3, line_cap='round')
