“…In boreal winter, convective overturning allows entrainment of nutrients into the mixed layer and leads to a prominent bloom in the northern AS (Banse and English, 2000;Madhupratab et al, 1996;Prasanna Kumar et al, 2001;Wiggert et al, 2002). In addition to these seasonal variations, several studies have revealed large interannual variations in the AS winter chlorophyll from either satellite (Banse and McClain, 1986;Banse and English, 1993;Sarma et al, 2006Sarma et al, , 2012Wiggert et al, 2002) or in situ measurements (Bauer et al, 1991;Madhupratap et al, 1996;Gundersen et al, 1998;Prasanna Kumar et al, 2001). This strong interannual variability of the northern AS winter bloom is illustrated in Fig.…”