There are many open questions related to how climate change will affect the biological pump. Of the following potential scenarios, which describes a logical sequence of feedbacks? 

A tide gauge records the following water levels (relative to a fixed datum) over one lunar day: ·      High Tide 1: +2.0 m·      Low Tide 1: +0.2 m·      High Tide 2: +1.2 m·      Low Tide 2: –0.4 mWhat is the total tidal range observed during this period?   _____________ m

Which of the following would be classified as organic matter? Select all that apply.

Given the following profiles of primary productivity and respiration, where in the water column is phytoplankton biomass increasing (that is, the net primary production (NPP) > 0)?  Select all that apply. 

A shallow coastal lagoon experiences strong semidiurnal tides. Over a full tidal cycle, salinity swings from 33 PSU at high tide to 27 PSU at low tide. What process most directly causes this variability?

A tidal turbine requires a minimum current of 1.5 m/s to generate electricity. If a site experiences maximum flood currents of 2.8 m/s and maximum ebb currents of 1.9 m/s, during which tidal phases will the turbine generate power? Jean-Paul Barbier/AFP/Getty Images

Why do “king tides” occur only a few times each year? Note: king tides are unusually high tides that occur when the Earth, Moon, and Sun align to produce an amplified tidal range.

What properties of seawater are directly impacted by the density of the water itself? Select all that apply.

Water is composed of  _____[A]_______   oxygen atom(s) and _____[B]_______ hydrogen atom(s). 

What is this bond called?