Extensive tree ring research indicates that the 22-year sunspot cycle may be related to:
A)warm periods in northern Europe.
B)rainy episodes in North Africa.
C)drought in the western United States.
D)El Niño.

Question

Quizplus · Accepted Answer

Tree ring research has shown correlations between the 22-year sunspot cycle and drought patterns in the western United States, as variations in solar activity can influence climate conditions.

Extensive Tree Ring Research Indicates That the 22-Year Sunspot Cycle