<div><p><strong>For complete methdology, see Martiny et al, (2019).</strong></p>
<p><strong>Data have been aggregated from many studies. Procedures and methodology include the following:</strong><br />
Sampling procedures:<strong> </strong>Liquid samples taken from the Rosette or Underway System. Samples are either processed fresh or stored frozen until processing. Some samples are pre-filtered.</p>
<p>Methodology: High sensitivity dissolved phosphate measurements done using either Liquid Waveguide Cells, magnesium induced precipitation (MAGIC), or solid phase extraction.</p>
<p>Many instruments were used but the main procedures include: MAGIC (Karl & Tien, 1992), LWCC - Liquid Waveguide cells (Li & Hansell, 2008), and Solid phase extraction (Ma, Yuan, & Yuan, 2017).</p></div>
Global distribution of phosphate using high sensitivity techniques
High Sensitivity DIP
<div><p>BCO-DMO Processing:<br />
- removed units from parameter names;<br />
- reformatted month and day to two-digits;<br />
- replaced "-9" as missing data identifier with "nd" in the day column;<br />
- added date field formatted as yyyymmdd.</p></div>
764704
High Sensitivity DIP
2019-04-10T15:33:06-04:00
2019-04-10T15:33:06-04:00
2023-07-07T16:10:26-04:00
urn:bcodmo:dataset:764704
Global distribution of phosphate using high sensitivity techniques from data aggregated from many studies between 1988-2017
Surface ocean phosphate is commonly below the standard analytical detection limit (~100 nM) leading to an incomplete picture of the global variation and biogeochemical role of phosphate. This dataset represents a global compilation of phosphate measured using high-sensitivity methods including magnesium induced precipitation (MAGIC), liquid waveguide cell (LWCC), and solid phase extraction (SPE) methods. We compiled data from 42 major cruises covering all oligotrophic regions using high-sensitivity P measurements. The dataset covered a total of 50591 samples including 41747 samples from the upper 30 m. The compilations revealed several previously unrecognized low-P areas and clear regional biases. Our study demonstrates the importance of accurately quantifying nutrients for understanding the regulation of ocean ecosystems and biogeochemistry now and under future climate conditions.
false
Martiny, A. (2019) Global distribution of phosphate using high sensitivity techniques from data aggregated from many studies between 1988-2017. Biological and Chemical Oceanography Data Management Office (BCO-DMO). (Version 1) Version Date 2019-04-17 [if applicable, indicate subset used]. doi:10.1575/1912/bco-dmo.764704.1 [access date]
true
1
10.1575/1912/bco-dmo.764704.1
false
magnesium induced precipitation
MAGIC
liquid waveglide cell
solid phase extraction
DIP
phosphate
dissolved inorganic phosphate
2019-04-17
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1988 - 2017
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