Imagine a stream with two cross sections, A1 and A2, as shown.  If the discharge (Q) remains constant, what happens to stream velocity at Location 2 if A2 is constant but Q increases after A1 (for instance by a tributary coming in)?

What do greenhouse gases do as part of the greenhouse effect?

What is base level?

Where will a photon emitted by a greenhouse gas molecule most likely go?

If more terrestrial radiation were able to leave Earth’s atmosphere than at present, we would experience

Describe a feedback loop in the climate system.  Explain if the loop is positive or negative and if it leads to cooling or warming.

How much incoming sunlight do greenhouse gases absorb?

What kind of feedback accelerates a change instead of braking it?

When organic carbon burial exceeds the rate at which weathering returns organic carbon to the atmosphere as CO2.  Does the stable isotopic composition of the atmospheric reservoir of atmospheric carbon become enriched with heavier or lighter isotopes? Explain why. 

Imagine a stream with two cross sections, A1 and A2, as shown.  If the discharge (Q) remains constant, what happens to stream velocity at Location 2 if A2 is greater than A1?