Monsoon Hadley index (Goswami)

V850 − V200 averaged 10–30°N, 70–110°E (regional Hadley circulation). — Goswami, Krishnamurthy & Annamalai 1999, Q. J. R. Meteorol. Soc. 125, 611–633, doi:10.1002/qj.49712555412