"Scale circulation" refers to the distribution or movement of something, such as information or goods, on a large or global level. It implies the widespread or extensive reach of the item being circulated. Full definition
The paper reports some results on the role of large scale circulation changes (which they conclude are minor) but I'll concentrate on the results relating to water vapor. (realclimate.org)
But after looking at several graphs that contain the last 17 years I don't see what you are talking about with regards to large scale circulation anomalies. (planet3.org)
Jiacan has worked on several projects on climate dynamics, including the response of large - scale circulations in the warming climate, its effects on regional weather patterns and extreme events, tropical influence on mid-latitude weather, and dynamical mechanisms of sub-seasonal variability of mid-latitude jet streams. (impactlab.org)