©2026 Biological and Chemical Oceanography Data Management Office.This event log was recorded during R/V Endeavor cruise EN734 in the central North Atlantic Ocean, during July and August 2025. The cruise track included six process stations, four of which comprise an offshore transect (PS1, PS2, PS3, PS4) and two of which were inside the lower reaches of Chesapeake Bay (PS5, PS6). Experimental manipulations to measure nitrogen (N) cycle processes were carried out at these stations. The sampling strategy was tailored to the process under investigation, e.g., pho...
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Event Log
The cruise track included six process stations, four of which comprised a transect along 36 N from the mid Sargasso Sea inshore towards Chesapeake Bay, including one in the Gulf Stream (PS1 - PS4). The other two stations (PS5, PS6) were inside Chesapeake Bay. Experimental manipulations to measure nitrogen (N) cycle processes were carried out at these stations. The sampling strategy was tailored to the process under investigation, e.g., photosynthesis and photochemical processes in surface waters, and depth profiles for most standard rates. Complete depth profiles were measured for nitrification, while CO2 and nitrogen nutrient (nitrate, ammonium, urea) uptake rates focused on the euphotic zone. One additional short station (PS6) was sampled only for nitrification and nitrate uptake. Nitrous oxide consumption and photochemical production of nitrous oxide were measured in surface waters at PS1-PS5.
CTD/Niskin bottle
A Seabird SBE-911+ was used with 12 30-L Niskin bottles.
Sensors:
Ward, B. B. (2026). Event log and CTD/Niskin bottle data collected from R/V Endeavor cruise EN734 in the North Atlantic and Chesapeake Bay from Jul to Aug 2025. Biological and Chemical Oceanography Data Management Office (BCO-DMO). (Version 1) Version Date 2026-09-21 [if applicable, indicate subset used]. doi:10.26008/1912/bco-dmo.1005482.1 [access date]
Terms of Use
This dataset is licensed under Creative Commons Attribution 4.0.
If you wish to use this dataset, it is highly recommended that you contact the original principal investigators (PI). Should the relevant PI be unavailable, please contact BCO-DMO (info@bco-dmo.org) for additional guidance. For general guidance please see the BCO-DMO Terms of Use document.