My Cruise

Ship

R/V Atlantis

Vehicles

Cruise Party

David Hutchins: Chief Scientist, Principal Investigator
3616 Trousdale Parkway P.O. BOX 90089 Los Angeles, CA USA 90089
+1 626 993 4093
dahutch@usc.edu

Departure: Praia, Cape Verde on Feb 11, 2018

Arrival: San Juan, Puerto Rico on Mar 14, 2018

Mobilization Date: Feb 8, 2018

Demobilization Date: Mar 15, 2018

Supporting documentation:

»Hutchins_preliminary_station_locations.xlsx

Operations Area: Latitudinal transect from Cape Verde due south to ~8S, return NW transect to Puerto Rico

Lat/Lon:

Depth Range: 0 / 200

Will the vessel be operating within 200 NM of a foreign country? Cape Verde Islands
Are visas or special travel documents required? no

Science objectives

We will be using trace metal clean sampling and incubation techniques to investigate iron and phosphorus control of nitrogen fixation in the tropical Atlantic.  Our research plan involves both station work to sample mixed layer profiles (~6-8 depths), collect whole water filtered samples using McClain pumps, net tows to obtain Trichodesmium samples.  Several sets of deckboard incubations will be running concurrently with the transect sampling.  I have uploaded a list of 20 straw-man stations, but we will be looking for Trichodesmium blooms, using both semi-daily net tows and based on ocean color imagery to be periodically sent to the chief scientist. Therefore, stations will necessarily be a bit opportunistic, and may require minor deviations from the cruise track (within reason, of course).

Science Activities

Station sampling will include regular CTD rosette profiles down to ~200m, deployment of a trace metal clean rosette system (coPI Saito), surface seawater trace metal clean pumping system (Saito), McClain pumps (Saito), possibly deployment of an in situ FiRE flurometer (Hutchins), and frequent net tows to collect Trichodesmium samples (Hutchins/Webb).  We also be carrying out simultaneous deckboard incubation work throughout the cruise using 4-5 flow-through deckboard incubators.

Pre-cruise planning meeting: Teleconference

I can visit WHOI if needed.

Stations:

Funding Agency: NSF #OCE 1657757

- added NSF #OCE 1657757 on Aug 30, 2017 1:09 PM by
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R/V Atlantis

Shipboard Equipment

Deionized Water System
Science Underway Seawater System
Transducer well for visiting instrumentation
Fume Hood
Navigation - Position

Shipboard Communication

Basic Internet access via HiSeasNet
Is there a need to receive data from shore on a regular basis?

CTD/Water Sampling

911+ Rosette 24-position, 10-liter bottle Rosette with dual T/C sensors
Biospherical underwater PAR (1000m depth limit) with reference Surface PAR
SBE43 oxygen sensor
Seapoint STM turbidity sensor
Wet Labs ECO-AFL fluorometer
Wet Labs FLNTURTD Combination Flourometer and Turbidity Sensor

Critical CTD Sensors: 

MET Sensors

Wind speed and direction
Short Wave Solar Radiation

Sample Storage

Freezer -70°C 25 cu. ft.
Freezer -70°C 3.2 cu. ft. ea.
Refrigerator 8.6 cu. ft.


Storage Notes: We will also be storing samples in liquid nitrogen dewars and are very interested in whether the ship's planned new LN generator will be available for our cruise, and whether it has the capacity to fill our dewars in Praia prior to the cruise, or can only supply small amounts to be used for topping off.  If the latter, we'll need to buy LN in Praia, we'd like to avoid that.

Navigation

Will you be using Long Base Line (LBL) navigation? no

Will you be using Ultra-short baseline (USBL) navigation for other than Alvin operations? no

Navigation Notes:

Winches

CTD Winch with .322" Electro-mechanical wire

Winch Notes:

Wire use and application

CTD Winch with .322" Electro-mechanical wire


Wire Notes: coPI Saito (from WHOI) will deploy his own trace metal rosette system, trace metal surface pumping system, and has requested McClain pumps as well.  Please communicate directly with him about requirements.  Hutchins will bring a collaborating researcher who will occasionally want to do mixed layer profiles with a submersible FiRE flurometer, which will need to be deployed using the winch.

Slip ring required? no	Number of conductors:
Non-standard wire required? no	Type:
Traction winch required? no	Describe:

Other Science Vans:

Other Science Vans:

Science Van 1
Type/size: 20ft lab van, PI-owned		Location: bay
Water:		Power:440/880

Specialized Deck Equipment

Mooring Deployment/Recovery Equipment Required: no	Type:
Cruise Specific Science Winch Required: yes	Type:  trace metal clean rosette
Nets Required: yes	Type: plankton net tows

Over the Side Equipment

Will you be bringing any equipment (winches, blocks, etc.) that lowers instruments over the side? yes

Details: coPI Saito will bring his trace metal clean rosette system.

Special Requirements

Elecrical Power: no	Identify:
Equipment Handling: no	Identify:
Inter/intraship Communications: no	Identify:
Science Stowage: yes	Identify: supplies and equipment stowage
Water: yes	Identify: Flowing seawater to supply 4-5 deckboard incubators

Additional Cruise Items/Activities

Explosive Devices: no Portable Air Compressors: no Flammable Gases: yes

Small Boat Operations: no SCUBA Diving Operations: no

Hazardous Material

Will hazardous material be utilized? yes

Describe deployment method and quantity:
Hazmats will be confined to lab spaces.  We will provide a detailed list of hazmats next week, we are compiling it now, but it will include HCl, NaOH, acetone, formalin, compressed H2, N2 and acetylene cylinders

Radioactive Material

Radioiosotopes: no

Additional Information

Is night time work anticipated on this cruise? yes

Specialized tech support (Seabeam, coring, other): 

Other required equipment and special needs: 
Date Submitted: Sep 1, 2017 2:11 PM