Meaning of USUALLY, IN OPERATIONAL METEOROLOGY, REFERENCES TO BAROTROPIC SYSTEMS REFER TO EQUIVALENT BAROTROPIC SYSTEMS in English

USUALLY, IN OPERATIONAL METEOROLOGY, REFERENCES TO BAROTROPIC SYSTEMS REFER TO EQUIVALENT BAROTROPIC SYSTEMS

systems in which temperature gradients exist, but are parallel to height gradients on a constant pressure surface. In such systems, height contours and isotherms are parallel everywhere, and winds do not change direction with height. As a rule, a true equivalent barotropic system can never be achieved in the real atmosphere. While some systems (such as closed lows or cutoff lows) may reach a state that is close to equivalent barotropic, the term barotropic system usually is used in a relative sense to describe systems that are really only close to being equivalent barotropic, i.e., isotherms and height contours are nearly parallel everywhere and directional wind shear is weak.

Weather and meteorology English vocabulary.      Английский словарь погоды и метеорологии .