Current biogeochemical and ecosystem research in the Northern Indian Ocean
Current biogeochemical and ecosystem research in the Northern Indian Ocean
Editor(s): G. Cowie, H. Kitazato, R. H. Hood, S. W. A. Naqvi, and A. Gooday
The northern Indian Ocean is home to remarkable phenomena, including seasonally reversing monsoon winds and associated upwelling and productivity, as well as the planet’s largest expanses of oxygen-depleted waters. The upwelling, productivity and hypoxia (open-ocean and coastal) are associated with biogeochemical processes that are of exceptional importance to global bioelement cycles, ocean nutrient inventories, and future climate. Given the large human populations that inhabit the rim nations and depend on marine resources, processes affecting the region also have major societal relevance. However, the two main basins – the Bay of Bengal and the Arabian Sea – also represent striking contrasts, in terms of circulation, upwelling and degree of hypoxia, in riverine and terrestrial influence, and in the effects on associated biogeochemical processes. As a result, the Arabian Sea, and, more recently, the Bay of Bengal have been sites of extensive biogeochemical and ecosystem research. With the advent of new methods and technology, and recognition of fundamental gaps in our understanding of both pelagic and benthic processes, a special issue focused on the northern Indian Ocean region is timely.

The special issue will serve to highlight results of benthic and pelagic process studies in the Arabian Sea and, more recently, the Bay of Bengal and Andaman Sea, including sediment trap deployments and moorings with biogeochemical sensors. It will also be a venue for articles on coastal studies by scientists from northern Indian Ocean rim nations, as well as diverse physical and biogeochemical modelling studies. Finally, the issue will serve to illustrate some of the key research areas that are relevant to the wider Indian Ocean, which have recently become the focus of the Sustained Indian Ocean Biogeochemistry and Ecosystem Research (SIBER) initiative.

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23 Apr 2015
Biogeochemical variability in the central equatorial Indian Ocean during the monsoon transition
P. G. Strutton, V. J. Coles, R. R. Hood, R. J. Matear, M. J. McPhaden, and H. E. Phillips
Biogeosciences, 12, 2367–2382,,, 2015
Short summary
04 Dec 2014
Comparative organic geochemistry of Indian margin (Arabian Sea) sediments: estuary to continental slope
G. Cowie, S. Mowbray, S. Kurian, A. Sarkar, C. White, A. Anderson, B. Vergnaud, G. Johnstone, S. Brear, C. Woulds, S. W. A. Naqvi, and H. Kitazato
Biogeosciences, 11, 6683–6696,,, 2014
21 Nov 2014
Temporal changes in surface partial pressure of carbon dioxide and carbonate saturation state in the eastern equatorial Indian Ocean during the 1962–2012 period
L. Xue, W. Yu, H. Wang, L.-Q. Jiang, L. Feng, L. Gao, K. Li, Z. Li, Q. Wei, and C. Ning
Biogeosciences, 11, 6293–6305,,, 2014
Short summary
30 Oct 2014
Surface circulation and upwelling patterns around Sri Lanka
A. de Vos, C. B. Pattiaratchi, and E. M. S. Wijeratne
Biogeosciences, 11, 5909–5930,,, 2014
16 Oct 2014
Seasonal and interannual variations in the nitrogen cycle in the Arabian Sea
T. Rixen, A. Baum, B. Gaye, and B. Nagel
Biogeosciences, 11, 5733–5747,,, 2014
22 Jul 2014
Mixed layer variability and chlorophyll a biomass in the Bay of Bengal
J. Narvekar and S. Prasanna Kumar
Biogeosciences, 11, 3819–3843,,, 2014
18 Jul 2014
Uptake of algal carbon and the likely synthesis of an "essential" fatty acid by Uvigerina ex. gr. semiornata (Foraminifera) within the Pakistan margin oxygen minimum zone: evidence from fatty acid biomarker and 13C tracer experiments
K. E. Larkin, A. J. Gooday, C. Woulds, R. M. Jeffreys, M. Schwartz, G. Cowie, C. Whitcraft, L. Levin, J. R. Dick, and D. W. Pond
Biogeosciences, 11, 3729–3738,,, 2014
16 Jun 2014
Vertical and lateral flux on the continental slope off Pakistan: correlation of sediment core and trap results
H. Schulz and U. von Rad
Biogeosciences, 11, 3107–3120,,, 2014
27 May 2014
Benthic mineralization and nutrient exchange over the inner continental shelf of western India
A. K. Pratihary, S. W. A. Naqvi, G. Narvenkar, S. Kurian, H. Naik, R. Naik, and B. R. Manjunatha
Biogeosciences, 11, 2771–2791,,, 2014
23 Apr 2014
Oxygen minimum zone of the open Arabian Sea: variability of oxygen and nitrite from daily to decadal timescales
K. Banse, S. W. A. Naqvi, P. V. Narvekar, J. R. Postel, and D. A. Jayakumar
Biogeosciences, 11, 2237–2261,,, 2014
10 Apr 2014
Uptake of phytodetritus by benthic foraminifera under oxygen depletion at the Indian margin (Arabian Sea)
A. J. Enge, U. Witte, M. Kucera, and P. Heinz
Biogeosciences, 11, 2017–2026,,, 2014
26 Feb 2014
Live (Rose Bengal stained) foraminiferal faunas from the northern Arabian Sea: faunal succession within and below the OMZ
C. Caulle, K. A. Koho, M. Mojtahid, G. J. Reichart, and F. J. Jorissen
Biogeosciences, 11, 1155–1175,,, 2014
27 Nov 2013
Amino acid composition and δ15N of suspended matter in the Arabian Sea: implications for organic matter sources and degradation
B. Gaye, B. Nagel, K. Dähnke, T. Rixen, N. Lahajnar, and K.-C. Emeis
Biogeosciences, 10, 7689–7702,,, 2013
15 Nov 2013
Southern Hemisphere imprint for Indo-Asian summer monsoons during the last glacial period as revealed by Arabian Sea productivity records
T. Caley, S. Zaragosi, J. Bourget, P. Martinez, B. Malaizé, F. Eynaud, L. Rossignol, T. Garlan, and N. Ellouz-Zimmermann
Biogeosciences, 10, 7347–7359,,, 2013
12 Nov 2013
Macrofaunal colonization across the Indian margin oxygen minimum zone
L. A. Levin, A. L. McGregor, G. F. Mendoza, C. Woulds, P. Cross, U. Witte, A. J. Gooday, G. Cowie, and H. Kitazato
Biogeosciences, 10, 7161–7177,,, 2013
02 Nov 2013
Sink or link? The bacterial role in benthic carbon cycling in the Arabian Sea's oxygen minimum zone
L. Pozzato, D. Van Oevelen, L. Moodley, K. Soetaert, and J. J. Middelburg
Biogeosciences, 10, 6879–6891,,, 2013
24 Oct 2013
Indian Ocean Dipole and El Niño/Southern Oscillation impacts on regional chlorophyll anomalies in the Indian Ocean
J. C. Currie, M. Lengaigne, J. Vialard, D. M. Kaplan, O. Aumont, S. W. A. Naqvi, and O. Maury
Biogeosciences, 10, 6677–6698,,, 2013
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