If Charles Keeling had chosen to carefully measure methane (instead of carbon dioxide)each month at the Mauna Kea Observatory,what might he have NOT found?
A) the gradual increase of that gas, year after year.
B) the same seasonal changes of that gas, year after year.
C) the effects of several volcanic eruptions, on atmospheric gas composition.
D) the effects of any massive melting/decomposition of methane hydrates.

Question

Quizplus · Accepted Answer

Charles Keeling would have not found the gradual increase of methane year after year, as methane levels have not shown a consistent increase like carbon dioxide. However, he would have still observed the same seasonal changes of methane. He would have also been able to observe the effects of volcanic eruptions on atmospheric gas composition and the effects of massive melting/decomposition of methane hydrates.

If Charles Keeling Had Chosen to Carefully Measure Methane (Instead