Temporal trends in deep ocean Redfield ratios

Science

Volumn 289, Issue 5486, 2000, Pages

  Zhang, Jia Zhong ^a   Mordy, Calvin W ^b   Gordon, Louis I ^c   Ross, Andy ^c   Garcia, Hernan E ^d  

^a UNIVERSITY OF MIAMI   (United States)

^b UNIVERSITY OF WASHINGTON   (United States)

^c OREGON STATE UNIVERSITY   (United States)

^d UNIVERSITY OF CALIFORNIA   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

EID: 0007672623     PISSN: 00368075     EISSN: 10959203     Source Type: Journal    
DOI: 10.1126/science.289.5486.1839a     Document Type: Note

References (9)

1. M. Pahlow and U. Riebesell, Science 287, 831 (2000).
2. -2 from 500 to 3000 m with a δ(AOU) of 0.7 ± 0.1 per mil per year over 14 years.
3. D. Spencer and A. Mantyla, in GEOSECS Atlantic Expedition, Hydrographic Data, 1972-1973, A. E. Bainbridge, Ed. (National Science Foundation, Washington, DC, 1981), vol.1, chap. 1, p. 5.
4. C. W. Mordy et al., EOS. Trans. Am. Geophys. Union 80 (suppl.), OS43 (1999); http://geoweb.princeton.edu/bigscience/GLODAP/details.html#Redfield.
5. V. Gouretski and K. Jancke, World Ocean Circulation Experiment Rep. No. 143/96 (WOCE Hydrographic Program-Special Analysis Centre, Hamburg, Germany, 1996).
6. A. Ross et al., EOS Trans. Am. Geophys. Union 80 (suppl.), OS4 (1999); http://ucs.orst.edu/~rossan/webversion.htm.
7. L. I. Gordon et al., EOS Trans. Am. Geophys. Union 80 (suppl.), OS45 (1999).
8. From the correction range of Pahlow and Riebesell (1) to the nutrient maximum (approximately 1800 m to 800 m), phosphate typically increases by about 0.8 μM in the Equatorial Atlantic. Calibration errors of about 3% [deep offsets in figure 1 of (1) are about 7% of deep phosphate concentrations, and errors in Table 1 are about 1 to 4% of concentrations in the deep Pacific] result in an underestimation of systematic errors in (1) by 0.02 μM phosphate in the nutrient maximum. Over the entire comparison range in (1), calibration errors are roughly half of those in the nutrient maximum, or >90% of the average phosphate trend implied by the results of Pahlow and Riebesell.
9. This work was funded by the NOAA and the NSF, and was carried out under the auspices of the Cooperative Institute for Marine and Atmospheric Studies (a joint institute of the University of Miami and NOAA) and the Joint Institute for the Study of Atmosphere and Ocean (a joint institute of the University of Washington and NOAA) under cooperative agreements NA67RJ0149 and NA67RJ0155.