Simplify the following text for a Grade 7 native English-speaking person.
Original: La NiÃ a is a coupled ocean-atmosphere phenomenon that is the counterpart of El NiÃ o as part of the broader El NiÃ o-Southern Oscillation climate pattern .
Simplified: La NiÃ a is a coupled ocean atmosphere phenomenon that is counterpart to El NiÃ o. The name means `` little girl '' in Spanish .