Fig. 6. Annual cycle of mixed-layer depths (MLD) in the Labrador Sea (partitioned into shelves and central basin): vertical bars = climatology (Monterey and Levitus, 1997), points = average values derived from LSMP spring and summer missions (vertical lines = standard errors, SE). Horizontal dashed line = average observed spring-summer euphotic zone depth (Ze = 4.6/Kz). Note difference in vertical (depth) scales.