All of the quality controlled HOT bottle oxygen data collected at Station ALOHA (Figure 1) were examined so that trends and suspicious data points could be identified. Analytical precision of the oxygen titrations from the 15 years of the HOT program was explored. In addition, dissolved oxygen concentrations from three depths at Station ALOHA were evaluated.
Figure 1. Vertical distribution of the bottle oxygen data collected
at Station ALOHA from HOT-1 through HOT-148. Only the data from HOT-1
through HOT-141 have been quality controlled. The anomalous points in
the upper left of the figure are data collected from an eddy encountered
during HOT-122 (Lukas and Santiago-Mandujano, 2001). A trend of lower
than normal values in the deep water data is discussed in Sections 4.2.3
and 4.2.4.
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