Table 1. Hydrographic stations occupied in 2016 during research cruise EN-589 aboard the R/V Endeavor.
Sea surface temperature (SST), sea surface salinity, wind speed, and Chl a are reported as the mean ± 1 SD.
| Property | Hydrographic stations | |||
| GB | SSW | SSN | BI | |
| Station name | Georges Bank | Sargasso West | Sargasso North | Coastal Rhode Island |
| Occupation dates | 18 to 22 September | 24 to 30 September | 1 to 7 October | 10 to 14 October |
| Latitude (°N), longitude (°W) | 41.40, 67.47 | 35.04, 69.98 | 36.26, 64.78 | 41.18, 71.16 |
| Bottom depth (m) | ~ 41 | ~ 5190 | ~ 4960 | ~ 42 |
| SST (°C)* | 18.6 ± 0.3 | 27.5 ± 0.5 | 26.3 ± 0.3 | 17.3 ± 0.2 |
| Salinity (ppt)* | 31.8 ± 0.1 | 35.3 ± 0.1 | 35.6 ± 0.1 | 31.7 ± 0.7 |
| Wind speed (m s−1)* | 9.0 ± 3.3 | 13.5 ± 5.5 | 13.5 ± 5.2 | 15.2 ± 10.7† |
| Chl a at 5 m (μg liter−1)‡ | 3.05 ± 0.59 | 0.04 ± 0.01 | 0.05 ± 0.01 | 2.49 ± 0.75 |
| DOC at 5 m (μM)§ | 89.4 ± 5.4 | 74.0 ± 1.0 | 71.2 ± 1.8 | 91.9 ± 1.0 |
*Mean ± 1 SD calculated from measurements recorded every 10 min using R/V Endeavor’s array of underway sensors and continuous in-line seawater system, which sampled seawater from ~5 m below the sea surface. Measurements for calculating means and SDs spanned 6.06 days at GB (n = 873), 4.97 days at SSW (n = 717), 4.99 days at SSN (n = 720), and 2.69 days at BI (n = 389).
†Wind speeds ranged from 2 to 44 m s−1 while occupying BI, averaging 26.19 ± 8.23 m s−1 on 10 October.
‡Mean Chl a concentrations and SDs (n = 30 to 62).
§Mean ± 1 SD reported for DOC concentrations from SSW (n = 2) and SSN (n = 3). Single SDs calculated from replicates at BI (±0.7 μM, n = 2) or propagated from manometry (±0.6 μM, n = 1) were less than the typical reproducibility of replicated standards (±1 SD = ±1.0 μM) and therefore reported as ±1.0 μM.