1. Description of Science Operations on HLY1702
Robert S. Pickart
Wood Hole Oceanographic Institution
Last updated March 17, 2017
Outline
I Brief overview of Science: Motivation and goals.
Operations: CTD, water sampling, net tows, benthic
work, underway measurements, marine mammal
and sea-bird observers, additional operations.

2. The Distributed Biological Observatory (DBO)

3. Pacific water inflow to the Arctic

4. The Distributed Biological Observatory / Northern Chukchi Sea Integrated Study
DBO-NCIS
Primary Aims
Occupy DBO lines 3, 4, and 5
Carry out a process study investigating the northeast shelf “hotspots”

5. Circulation scheme based on the 2010-11 ICESCAPE Program

6. DBO-NCIS HLY1702 Black dots: DBO stations
Red dots: Shelf survey stations

7. Components of DBO-NCIS Cruise Physical Oceanography CTD R. Pickart
Water Sampling from the Rosette
L. Cooper (O-18)
C. Mordy (nutrients/chlorophyll/oxygen)
J. Cross (carbon)
Mesozooplankton and Larval Fish
J. Duffy-Anderson
Benthos/Sediments
J. Grebmeier
Underway Measurements
R. Pickart, J. Cross
Upper Trophics
K. Kuletz (seabirds)
Sue Moore (marine mammals)
Outreach
E. Arnold (NPR), NOAA teacher at sea
Components of
DBO-NCIS Cruise
Lead PIs for each group

8. CTD Operations

9. CTD Operations
A CTD cast will be done at every station. An MST will run the winch and
deck personnel will deploy and recover the package. The STARC team will
provide a 1-db averaged downcast CTD file immediately after each cast
(using a batch script of Sea-Bird processing routines)
Our usual mode of operation is that the science party will be responsible for:
--pre-cast set up of the acquisition computer
--manning the acquisition computer during the cast
and guiding the package to the bottom and back
--providing a person on deck to help launch and recover
the package if necessary
--preparing the package for the next cast

10. CTD Operations Details
Primary System
Seabird frame
SBE9plus CTD w/ dual temperature (SBE3) and
conductivity (SBE4) sensor pairs
SBE11plus deckunit
Transmissometer
Fluorometer
altimeter (rated for at least 3000m depth)
SBE43 O2 sensor
24-position pylon with 12 liter bottles
silicon o-rings
Backup System
Spare 24 x 12 liter package
Computers
we will use Healy’s acquisition computer running Sea-Bird's
acquisition software. We hope that there is a
backup acquisition computer.
we will provide the computer/software for post-cast processing and
in-situ calibration of the CTD data
CTD Operations Details

11. CTD Operations Details
Sensor Calibrations
It is our understanding that the CTD sensors were calibrated after
the 2016 field season, and will be calibrated again after the 2017 field
season

12. Water sample Operations

13. Water Chemistry
After each CTD cast, water samples will be collected from the Niskin
bottles on the rosette. On average, the water sampling will take minutes
and necessitates the use of Hazmat chemicals in the CTD hanger and main lab
The Niskin bottles should have silicon o-rings or similar non-toxic o-rings
It is our understanding that the 12 L bottles have external springs
If the 30 L bottles have internal Teflon coated springs, they should be
inspected (although we will not be using this package on the cruise)

14. Water Chemistry Details
1. Salts
We will collect a limited number of salt samples. It is our
understanding that the ship has salt bottles and standard water, and
that the ship will supply a person to run the autosal
2. Oxygen-18
No special needs
3. Nutrients
4. Dissolved oxygen
This requires the use of Hazmats in the CTD hanger and storage in the lab
(sodium hydroxide/sodium iodide solution and manganese chloride solution)
5. Chlorophyll
This requires the use of a freezer (preferably -80oC)

15. Water Chemistry Details
5. Dissolved Inorganic Carbon (DIC) and Total Alkalinity (TA)
This requires the following:
DIW dispensing system (18-Ohm)
Compressed gas tank storage in the wet lab (ultrapure N2)
Functioning fume hood
Use of Hazmats in the CTD hanger and storage in the lab
(hydrochloric and phosphoric acid, mercuric chloride)

16. Zooplankton and Larval Fish Operations

17. Zooplankton Net Tows
Zooplankton multi-net tows will be conducted off the stern using the ship’s
spare drum of conducting cable (2000m necessary)
A Sea-Bird Electronics SBE 49 FastCAT Profiler or SBE 19 SeaCAT
will be attached to the wire above the Bongo frame(s) to provide
real-time tow data
A scientist will be stationed in the lab to monitor the FastCAT and inform the
winch operator when the desired gear depth is reached (either 200m or 5-10m above the bottom)

18. Benthic Operations

19. Benthic Sampling
Two types of benthic sampling will be done: van Veen grabs and Haps coring
These will be conducted off the stern using the 9/16 trawl wire
Five van Veen grabs and three Haps cores will be done at select “process stations”

20. Benthic Sampling Details
The benthic sampling requires the following:
two walk-in climate-controlled rooms at 1oC
space in the walk-in refrigerator
space in the walk-in freezer
deionized water system working

21. Underway Measurements

22. Underway Measurements
It is our understanding that the STARC technicians will be running
the multi-beam during the cruise, and that the Knudson system will be
operational as well
We will use both the 75 KHz and 150 KHz vessel-mounted ADCPs
throughout the cruise. Jules Hummon will monitor the data quality
during the cruise and process the data post-cruise
We will use the underway CTD/pCO2 data and draw samples
from the underway seawater line
It is our understanding that the meteorological sensors are operational

23. Upper Trophics

24. Upper Trophics
There will be two seabird observers and one marine mammal observer on the cruise
These observations will be conducted from the bridge

25. Additional Operations

26. Additional Operations
We will launch three pop-up buoys
(small anchored floats that are tossed over the side... no crane necessary)
We will deploy an UpTemp0 buoy (25m sensor string beneath
a buoyant float…no crane necessary)
If possible we will do a calibration exercise adjacent to a Saildrone
(an autonomous surface vehicle)

27. Timing

28. There are 29 DBO stations and 67 shelf stations for total of ~100 stations
CTD: a single cast at all stations
Zooplankton: all DBO stations and every 2nd shelf station [20 min per station] total of ~60 stations
Benthos: process stations (5 grabs + 3 haps) at all DBO stations and every 3rd shelf station [50 min per station] total of ~50 stations

29. 21 day cruise from Dutch Harbor to Dutch Harbor, 26 August – 15 September
Need to pick up 3 scientists in Nome on the way north on 28 August
Scientists can stay on the ship starting the evening of 23 August

30. Timeline February: cruise plan presented at AEWC winter meeting
March: complete cruise questionnaire and hold teleconference
29 May – 4 Jun: onload in Seattle
May: medical forms / foreign national forms due
27 Nov – 3 Dec: offload in Seattle

31. Physical oceanography (CTD/ADCP)
1. Robert Pickart, WHOI
Peigen Lin, WHOI
Lola Hernandez, WHOI
Leah Trafford, WHOI
5. Min Li, WHOI student
6. Astrid Pacini, WHOI student
Hydrography (rosette sampling)
7. Lee Cooper, CBL/UMCES
8. Lou Codispoti, HPL/UMCES
9. Chris Pave, HPL/UMCES student
10. Calvin Mordy, PMEL/NOAA
11. Jessica Cross, PMEL/NOAA
Mesozooplankton and larval fish
12. Morgan Busby, PMEL/NOAA
13. Franz Mueter, UAF student
14. TBD, UMCES student
Benthos
15. Jackie Grebmeier, UMCES
16. Chelsea Wagner, UMCES
17. TBD, UMCES student
18. TBD, UMCES student
19. Eric Collins, UAF
20. TBD, UAF student
Upper Trophics
21. Kathy Kultez, USFWS
22. TBD, USFWS
23. Sue Moore, NOAA/NMFS
Management and Outreach
24. Jeremy Mathis, Director, NOAA Arctic Research Program
25. Elizabeth Arnold, Univ. Alaska Anchorage, past NPR reporter
26. Possibly NOAA teacher at sea
27. NOAA Sea Grant student #1
28. NOAA Sea Grant student #2
29. NOAA Sea Grant student #3
30. NOAA Sea Grant sutdent #4
Science party
as of 3/8/17
Chief Sci: Bob Pickart
Co-Chief Sci: Jackie Grebmeier