Figure 1. Relationship between gas transfer velocity, k600, and wind speed, U, for estuaries. Open squares = 1993 Hudson River data; Open circles = 1994 Hudson River data; filled circles = San Francisco Bay data (Hartman and Hammond, 1984); Crosses = Hudson River data (Marino and Howarth, 1993). The dashed and solid lines are the relationships of Liss and Merlivat (1986) and Wanninkhof (1992), respectively.