AT42-10: Ohman "CCE-LTER3"

Ship

R/V Atlantis

Vehicles

Cruise Party

Uwe Send: Chief Scientist, Principal Investigator
USA
+1 858 822 6710
usend@ucsd.edu

Departure: San Diego on Apr 27, 2019

Arrival: San Diego on May 3, 2019

Mobilization Date: Apr 26, 2019

Demobilization Date: May 4, 2019

Supporting documentation:

»201904_Atlantis_AT42-10_Cruiseplan.xlsx
»Ohman_AT41-10_sciberth_17092.pdf
»cce1_13_dwg.pdf
»cce2_11_dwg.pdf
»dmar1_14_IFCB_deployed_dwg.pdf
»Atlantis_AT42-10_deckplan.pdf
»CCE_Hazmat_2019.xlsx
»Sea_Surface_Request_WHOI_AT42-10.doc
»CCE1_CORC3_DM_deckweights_2019.xlsx
»AT42-10_cruise_track.JPG
»plot_map_cce2_positions.pdf
»plot_map_cce1_positions.pdf
»DelMar_Assets_20180531.pdf
»CORC3_2018_asset_map.pdf

Operations Area: Southern California

Lat/Lon: 33° 0.0′ N / 122° 0.0′ W

Depth Range: 100 / 4000

Will the vessel be operating within 200 NM of a foreign country? no

Science objectives

The California Current is a region of large ecological significance and
known sensitivity to climate forcing. Climate processes, complex
physical systems, carbon and nutrient chemistry, and ecosystem dynamics
all interact to create a rich, societally important, and scientifically
fascinating ocean environment off the west coast of the US. This project
establishes a unique highly multidisciplinary mooring presence in the
southern California Current: two moorings, called CCE(California Current
Ecosystems)-1 and -2 are located in the core of the California Current
and in the upwelling regime on the continental slope, respectively,
along CalCOFI line 80, and measure:

•  atmospheric conditions (CO2, wind, temperature, humidity,
precipitation, irradiance),
•  surface ocean conditions (temperature, salinity, pCO2, O2, pH,
currents, point and integrated measures of phytoplankton 
    chlorophyll content over the euphotic zone, and nitrate supply), and
mixed-layer depth,
•  broad-band active-acoustic observations of zooplankton and fish
biomass over the upper 300m.

The overarching science objectives are to:
1. Study the time variability of physical conditions and its forcing on
time scales from days to years.
2. Observe the impact of physical variability on biogeochemical and
ecosystem processes and conditions.
3. Relate environmental habitat conditions to fisheries quantities.

Science Activities

Cruise activities:

1. Recover a coastal mooring off Del Mar.
2. Recover the CCE1 mooring.
3. Recover the CCE2 mooring.
4. Re-deploy the (new/refurbished) CCE1 mooring.
5. Re-deploy the (new/refurbished) CCE2 mooring.
6. Collect CTD cast data with water samples for calibration/validation
(cal/val) of the mooring data.
7. Collect standard underway data for cal/val and as background site
information, esp. ship ADCP, thermosalinograph, and meteorology
instruments.
8. CORC3 PIES recovery and redeployment
9. CORC3 Mooring acoustic data downloads 

Pre-cruise planning meeting: Teleconference

Stations:

Funding Agency: NSF #OCE-16-37632, NOAA #N/A, direct transfer

- added NSF #OCE-16-37632, added NOAA #N/A, direct transfer on Feb 8, 2019 12:55 PM by
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R/V Atlantis

Shipboard Equipment

Bathymetry System 12 kHz
Bathymetry System 3.5 kHz
ADCP 75 kHz
A-Frame
Deionized Water System
Science Underway Seawater System
Navigation - Heading
Fume Hood
Navigation - Position
Crane

Shipboard Communication

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

CTD/Water Sampling

911+ Rosette 24-position, 10-liter bottle Rosette with dual T/C sensors
SBE43 oxygen sensor
Wet Labs ECO-AFL fluorometer

Critical CTD Sensors: 

MET Sensors

Barometric Pressure
Air temperature
Relative Humidity
Wind speed and direction
Short Wave Solar Radiation

Sample Storage

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


Storage Notes:

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

GPS

Navigation Notes:

Winches

CTD Winch with .322" Electro-mechanical wire
Mooring / TSE winch
Other Portable Winch

Winch Notes:

two air tuggers for mooring operations

We will be attaching equipment to the CTD rosette for calibration/valibration.

 

Attaching an acoustic modem to the CTD rosette for acoustic downloads at CORC3 mooring site.

Wire Notes:

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

Other Science Vans:

Specialized Deck Equipment

Mooring Deployment/Recovery Equipment Required: no	Type:
Cruise Specific Science Winch Required: no	Type:
Nets Required: no	Type:

Over the Side Equipment

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

Details: Yes, a block rated to 5500lbs & 10k lbs for mooring operations.

Special Requirements

Elecrical Power: no	Identify:
Equipment Handling: no	Identify:
Inter/intraship Communications: no	Identify:
Science Stowage: no	Identify:
Water: no	Identify:

Additional Cruise Items/Activities

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

Small Boat Operations: yes SCUBA Diving Operations: no

Hazardous Material

Will hazardous material be utilized? yes

Radioactive Material

Radioiosotopes: no

Additional Information

Is night time work anticipated on this cruise? yes

Specialized tech support (Seabeam, coring, other):  CTDs, and potentially mooring operations.

Other required equipment and special needs: 
Date Submitted: Feb 8, 2019 2:18 PM