1. Breakout Group #1- Input from BATS, CARIACO, SBC LTER- plumes and Blooms, TMA transect
Some sites have multiple day / casts to accomplish core measurements.
•PIT Trap deployment
•Deep/ Surface casts
•PP array
Criteria for sites when considering sample order:
• minimization of contamination (gasses, handling w/ organics)
• importance of sample relative to water budget

2. Core sample draw order:
1. Gasses: H2S, O2, DIC
2. Salinity
3. Dissolved organic nutrients – minimize handling, head pressure from Niskin for direct filtering
4. Samples for Rate measurement where applicable
5. Dissolved inorganic nutrients
6. Particulate Nutrients, Chl a and pigments
Some sites must conduct multiple cast to cover all parameters from top to bottom….site/ depth/ Niskin volume specific

3. Discussion Points:
POC sampling- bias may result from settling POM within Niskin Bottle… leading to underestimate of POM.
Potential Solution:
In some coastal stations Niskin Bottles are double tripped such that One of the replicate bottles is drained into a carboy that can be mixed prior to sampling POM, Chl a
Important to assess this bias with separate sampling cast – likely more important in coastal systems with net plankton than in Oligotrophic systems with picoplankton.

4. Discussion Points:
Common sense ….Chief Sci Needs to be aware and inform officers and crew of potential boat contaminants:
Bilge / garbage release
Painting and needle gun work
grease on sample tubing
smoking