April 20-24 2021 (XR01)

1. Station map

Fig. 1 Station map of all CTD casts.

2. Cruise Participants

Chief Scientist

Dr. Steven F. DiMarco (TAMU)

Senior Scientists

Dr. Xinping Hu (TAMUCC), project lead
Dr. Piers Chapman (TAMU/GERG), Oxygen chemistry, nutrients

Graduate Students and Techncian

Reshmi Joseph (TAMU/GERG), CTD sampling
Hannah Diaz (TAMU/OCNG), CTD sampling
Sakib Mahmud (TAMU/OCNG), served as additional marine tech
Xiao Ge (TAMU/OCNG), CTD sampling
Eva Jundt, (TAMUCC), DIC sampling, CTD sampling
Cory Staryk (TAMUCC), DIC sampling, CTD sampling

3. Sample Collection

During the cruise, CTD casts were made at 25 stations across the studied area. A total of 192 dissolved oxygen samples were analyzed on board the ship using Winkler titration. A total of 185 nutrient samples and 65 salinity samples were collected for lab analysis at GERG/TAMU. A total of 152 samples were collected for carbonate chemistry characterization (total alkalinity, total dissolved inorganic carbon, and pH) at TAMU-CC. A subset of the carbonate chemistry samples were analyzed for pH using spectrophotometric method on board the ship. In addition, a number of samples were collected for oil, methanol, and microbial analyses for the collaborators of the scientific party on board.

4. Preliminary Results

Fig. 2 A scatter plot of potential temperature and salinity from all CTD cases.

Fig. 3 Sea surface CO₂ partial pressure (pCO₂), temperature (SST), and salinity (SSS) along the cruise track. Squares in the pCO₂ panel are CTD stations.