GO-SHIP P02 2022 Hydrographic Program¶

Summary¶

The Leg 1 2022 reoccupation of the GO-SHIP P02 hydrographic line, RR2204 (Fig. 1) included 117 stations using a 36-bottle rosette: One station (Sta 1, 21.000°N, 140.050°E) along the transit from Guam at which core/bio 1 measurements were acquired between 1500/1000 m and the surface in support of a GO-BGC Argo float deployment; A single underway HPLC sample in support of a second float deployment (Sta 2, 26.670°N, 137.080°E); full water column core sampling at 12 stations from 32.507°N, 133.030°E to 30.000°N, 134.860°E, and 103 stations eastward along 30°N to 198.786°E. Biology samples were obtained approximately every third station. In all, 10 GO-BGC floats were deployed - all (except the underway Sta 2 float) were supported by both core and bio sampling.

_images/Fig_1_p02w_2022_track_compl_ports_map_09-Jun-2022.svg — Black crosses - for P02W 2022 station locations; green crosses - stations that included bio-only bottles and/or casts, cyan asterisks - GO-BGC float deployments; purple dots - departure (Guam, Navy Base) and arrival (University of Hawaii Pier, Honolulu) ports; and blue shading - 1 minute Smith and Sandwell bathymetry.¶

The planned station spacing included very close spacing down the Japan coast and across the region of the Kuroshio its large loop and generally 30 nm spacing across the rest of the section. The delay at the start and a limited allowed time in the Japan EEZ led to a reduced number of stations in the west (9 vs. 15 coming south to 30°N, 23 vs. 33 in the Japan EEZ, and 46 vs. 59 west of 159°E where in 2022 30 nm spacing was resumed). The planned 131 stations were reduced to 117, but with fantastic weather and seas, Leg 1 finished only 1° west of the original longitudinal goal.

The rosette instruments included dual CTDs, one with oxygen (SBE43), a secondary separate RINKO oxygen sensor, fluorometer, transmissometer, upward and downward-looking LADCPs an underwater vision profiler (UVP), two upward-looking and one downward-looking Chi-POD. All 10 GO_BGC floats deployed had biochemical sensors. Along all transits, including those in Japanese waters, continuous underway shipboard multibeam bathymetry, TSG, met and pCO2 data were collected and a flow-through cytometer was run. The SADCP ran continuously. The EK-80 ran during each cast. There was also discrete underway sampling three times a day that included HPLC, POM, POC/N and DNA/RNA. Please see individual sections for further detail.

Programs and Principal Investigators¶

Program	Affiliation	Principal Investigator	Email
BGC Floats	SIO	Lynne Talley	ltalley@ucsd.edu
C13 & C14	UW, WHOI	Rolf Sonnerup, Roberta Hansman	rolf@uw.edu, rhansman@whoi.edu
CFCs, SF6	UT	Dong-Ha Min	dongha@austin.utexas.edu
Chipods	OSU	Jonathan Nash	nash@coas.oregonstate.edu
CTDO Data, Salinity, Nutrients, Dissolved O₂	UCSD, SIO	Susan Becker, Todd Martz	sbecker@ucsd.edu, trmartz@ucsd.edu
Underway pCO₂	PMEL, NOAA	Simone Alin	simone.r.alin@noaa.gov
DOC, TDN	RSMAS	Dennis Hansell	dhansell@rsmas.miami.edu
Lowered ADCP	LDEO	Andreas Thurnherr	ant@ldeo.columbia.edu
POC, HPLC	UCSD	Adam Martiny	amartiny@uci.edu
Shipboard ADCP	UH	Julia Hummon	hummon@hawaii.edu
Total Alkalinity, pH	SIO	Andrew Dickson	adickson@ucsd.edu
Total CO₂ (DIC)	PMEL, NOAA	Richard Feely	richard.a.feely@noaa.gov
Transmissometer	UCI, OSU	Adam Martiny, Jason Graff	amartiny@uci.edu, jason.graff@oregonstate.edu
UVP-5	UAF	Andrew McDonnell	amcdonnell@alaska.edu

Science Team and Responsibilities¶

Duty	Name	Affiliation	Email Address
Chief Scientist	Alison Macdonald	WHOI	amacdonald@whoi.edu
Co-Chief Scientist	Shuwen Tan	LDEO	shuwent@ldeo.columbia.edu
CTD Watchstander	Vic Dina	RSMAS	victoria.dina@rsmas.miami.edu
CTD Watchstander	Lauren Moseley	LDEO	laurenm@ldeo.columbia.edu
CTD Watchstander	Mariana Aguirre Nunes	FSU	ma20gn@fsu.edu
CTD Watchstander	Sophie Shapiro	UCSD	soshapiro@ucsd.edu
Nutrients, ODF supervisor	Susan Becker	UCSD ODF	sbecker@ucsd.edu
Nutrients	Megan Roadman	UCSD ODF	mroadman@ucsd.edu
CTDO Processing	Aaron Mau	UCSD ODF	ajmau@ucsd.edu
Salts, ET, CTD/Rosette Maintenance	John Calderwood	UCSD SEG	jcalderwood@ucsd.edu
Salts, Marine Technician	Royhon Agostine	UCSD	ragostine@ucsd.edu
Marine Technician	Josh Manger	UCSD	jmanger@ucsd.edu
CR Technician	Nicholas Benz	UCSD	nbenz@ucsd.edu
Dissolved O₂, Database Management	Andrew Barna	UCSD ODF	abarna@ucsd.edu
Dissolved O₂	Elisa Aitoro	UCSD ODF	eaitoro@ucsd.edu
LADCP	Kurtis Anstey	UVic	kurtis.anstey@live.ca
Bio/Genomics	Adam Fagan	UCI	afagan@uci.edu
Bio/Imaging	Star Dressler	UOG	dresslerc@gotritons.uog.edu
UVP-5	Stephanie O’Daly	UAF	shodaly2@alaska.edu
Total Alkalinity	Sara Gray	UCSD	s5gray@ucsd.edu
Total Alkalinity	Daniela Nestory	UCSD	dnestory@ucsd.edu
pH	Brison Grey	U Miami	bjg136@miami.edu
pH	Albert Ortiz	RSMAS	albert.ortiz@rsmas.miami.edu
DIC	Dana Greeley	NOAA	djgreel1@gmail.com
DIC	Julian Herndon	NOAA	julian.herndon@noaa.gov
CFCs	David Cooper	UT	davidcooper59@gmail.com
CFCs	Carol Gonzalez	UT	carolgonzalez@utexas.edu
CFCs	Sidney Wayne	UCSD	sidneyelisawayne@gmail.com
DOC	Abby Tinari	RSMAS	a.tinari@umiami.edu

1: Throughout “core” refers to the regular (GO-SHIP levels 1-2) sampling and “bio” refers to the biology sampling performed by the Bio GO-SHIP team. See Bio section of this report for the details on the bio sampling.