Date: Tue, 31 Mar 1998 12:41:19 -0500 X-Sender: eadie@glerl.noaa.gov Mime-Version: 1.0 To: eegle-pi@wings.glerl.noaa.gov From: "Brian J. Eadie" Subject: Lagrangian experiments Cc: Winkelman@genie.glerl.noaa.gov This morning Andy Winkelman launched two of McCormicks (satellite tracked) drifters, each equiped with a (10 bottle, 8" diameter) sequencing trap and a transmissometer (from CCIW). The drifters were deployed from the Laurentian; 1 in 25m total depth and 1 in 50m, west and northwest of Benton Harbor, respectively (within the visible plume). The instruments are at 5m below the surface and the traps are sampling at 2 day intervals for 10 days, then at 3 day intervals for 15 days. We hope that they last without grounding for the entire deployment, and plan to retrieve them after 00:05 on April 27 from the Laurentian (if possible) as part of the sediment cruise. We hope to get mass and constituent fluxes, ensemble settling velocities and changes in the plume materials settling out as the system relaxes from the event. Is there any interest in Th ? - we will measure carbon, nutrients, chlorophyll and mass > and < 60um. Don't know sample sizes, but guess 100s of mg per for the 20 samples. Anyone else interested in sub-samples ?? Poisoned with HgCl2 @ 500 mg/l concentration. ---------------------------------------------------------------------------- ------- Brian J. Eadie, PhD NOAA - Great Lakes Environmental Research Laboratory 2205 Commonwealth Blvd Ann Arbor, MI 48105 - 2945 NEW (12/07) 734 -741-2281 (voice) -2055 (fax) ---------------------------------------------------------------------------- -----