Water passed through a sequential arrangement of three filters: 20 um pore-size polycarbonate (47 mm), 5 um pore-size polycarbonate (47 mm) and 0.7 um effective pore-size glass fiber (25 mm). Preliminary tests showed that 47-mm glass fiber filters had a reduced chlorophyll extraction efficiency compared with filters 25 mm in diameter. Filters were immediately placed in 90% acetone, extracted 24 hr (-20degC, darkness), and analyzed for chlorophyll and phaeopigments a on a Turner TD700 (April, May) or Turner 112 (July) fluorometer. Total chlorophyll concentrations were estimated from the sum of the three size fractions.
<p>Summary prepared by Erin Macri [WWU]</p>
<p>Prepared for serving: H. Batchelder, 2 Sept 2004<br>
Re-served for text or mapserver access Jan 2007, GLOBEC DMO </p>
<p></p><ul><li> 1. Physical data processed by Tom Weingartner (UAF)</li>
<li> 2. Chlorophylls provided by Suzanne Strom (WWU)</li>
<li> 3. Nutrient analysis provided by Calvin Mordy (NOAA/PMEL))</li>
<li> 4. Dates and times are in Local; Local is +8 hours from GMT e.g., 1100 GMT ==> 0300 Local</li>
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