Indian Ocean Nitrogen Cycling (August-September 1986)

Data set information

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Data holding centrePlymouth Marine Laboratory
CountryUnited Kingdom  United Kingdom
Time periodFrom August to September 1986
Geographical area

North west Indian Ocean


Nitrate concentration parameters in the water column; Salinity of the water column; Dissolved inorganic nitrogen concentration in the water column; Dissolved total and organic nitrogen concentrations in the water column; Temperature of the water column; Zooplankton non taxonomy-related biomass expressed as nitrogen per unit volume of the water column; Nitrification and denitrification rates in water bodies; Sedimentation flux of carbon, nitrogen or organic matter in the water column; Dissolved trace metalloid and inorganic selenium concentrations in water bodies; Particulate trace metalloid and inorganic selenium concentrations in water bodies; Nitrogen concentrations in sediment; Inorganic chemical composition of sediment or rocks


Nutrient analysers; discrete water samplers; elemental analysers; CTD


The north west Indian Ocean encompasses some of the biogeochemically most extreme conditions found in any ocean, ranging from the oligotrophic subtropical gyre, to an underlying hypoxic intermediate (100-1200m) water mass extending southward from the Arabian Sea to 12° N, to a pronounced seasonal upwelling regime off coastal Somalia and the south east Arabian peninsula driven by the south west monsoons. The biogeochemical data collected on RRS Charles Darwin cruise 16/86 focused on assessing the contrasting vertical profiles and fluxes of carbon, nitrogen and trace metals in relation to the oceanographic water masses that characterise the different regions of the north west Indian Ocean.

OriginatorsPlymouth Marine Laboratory

Mantoura, R.F.C. (1991) Nutrient and trace metal biogeochemical cycling in the north west Indian Ocean, RRS Charles Darwin 16/86: 8 September - 12 October 1986. Cruise Report, ; Law, C.S. & Owens, N.J.P. (1990) Significant flux of atmospheric nitrous oxide from the northwest Indian Ocean., Nature 346(6287): 826-828.; Owens, N.J.P. , Law, C.S. , Mantoura, R.F.C., Burkill, P.H.& Llewellyn, C.A. (1991) Methane flux to the atmosphere from the Arabian Sea 293., Nature 354(6351): 293-296.; Burkill, P.H., Mantoura, R.F.C., and Owens, N.J.P. (1993) Biogeochemical cycling in the northwestern Indian Ocean: a brief overview., Deep Sea Research I 40(3): 643-849.

OrganisationPlymouth Marine Laboratory
AvailabilityBy negotiation
ContactThe Director

Plymouth Marine Laboratory
Prospect Place The Hoe
United Kingdom

Telephone+44 1752 633100
Facsimile+44 (0)1752 633101
Collating centreBritish Oceanographic Data Centre
Local identifier1053009
Global identifier690
Last revised2010-11-22