Organic and Inorganic Nutrients from the MGL1704 Cruise

Dataset Name Sensor Make Spatial Resolution Temporal Resolution Start Date End Date
Organic and Inorganic Nutrients from the MGL1704 Cruise cruise Observation Irregular Irregular 2017-05-30 13:28:39 2017-06-11 15:49:04

Dataset Description

All organic and inorganic nutrients are analyzed in unflitered seawater that was sampled aboard into HDPE or polypropylene bottles and immediately frozen. Silicate, phosphate and nitrate+nitrite are determined colormetrically on a SEAL Analytical Autoanalyzer (AA3 with HR detectors), with the exception of nitrate+nitrite that is <0.5umol/L, which is analyzed by chemiluminescence. Total phosphorus (TP) and total nitrogen (TN) are determined by analysis of phosphate and nitrate, respectively, after oxidation by high-intensity ultraviolet light. Total organic phosphorus and total organic nitrogen are determined by subtracting background PO4 and NO3+NO2 from TP and TN, respectively. Total organic carbon is determined by combustion on a Shimadzu TOC-V analyzer.

Table of Variables

Data Source

University of Hawaii - Manoa, David Karl lab

How to Acknowledge

Foreman, R. K., Segura-Noguera, M., & Karl, D. M. (2016). Validation of Ti(III) as a reducing agent in the chemiluminescent determination of nitrate and nitrite in seawater. Marine Chemistry, 186, 83–89. doi:10.1016/j.marchem.2016.08.003

Foreman, R. K., Björkman, K. M., Carlson, C. A., Opalk, K., & Karl, D. M. (2019). Improved ultraviolet photo-oxidation system yields estimates for deep-sea dissolved organic nitrogen and phosphorus. Limnology and Oceanography: Methods. doi:10.1002/lom3.10312

Carlson, C. A., D. A. Hansell, N. B. Nelson, D. A. Siegel, W. M. Smethie, S. Khatiwala, M. M. Meyers, and E. Halewood. (2010). Dissolved organic carbon export and subsequent remineralization in the mesopelagic and bathypelagic realms of the North Atlantic basin. Deep-Sea Res. Part II, 57, 1433–1445. doi: 10.1016/j.dsr2.2010.02.013

Version History

V1 - Released on 2020-01-08