Relative to glacial mass balance,which of the following is correct?
A)a positive net balance occurs during a cold period,and a negative net balance occurs during a warm period.
B)glacial mass is increased by evaporation,sublimation,and deflation.
C)glacial mass is increased by a combination of processes called ablation.
D)worldwide,most glaciers are showing marked net increase in mass at present.
E)where the balance is zero,the ice advances.

Question

Quizplus · Accepted Answer

A positive net balance occurs during a cold period, and a negative net balance occurs during a warm period. Glaciers experience growth when more snow accumulates during the winter than melts or evaporates during the summer. This leads to a positive net balance. Conversely, when more ice melts or evaporates during the summer than accumulates during the winter, the glacier experiences a negative net balance. This is more likely to occur during warm periods. Therefore, option A is correct. The other options are incorrect.

Relative to Glacial Mass Balance,which of the Following Is Correct