Arvind Singh E-mail: arvinds@prl.res.in Telephone: +91-79-2631 4366

Present Research Interests

·        Biological Nitrogen Fixation

·        Marine Nutrient Cycling

·        C:N:P Stoichiometry

·        Ocean Alkalinity Enhancement/CO₂ removal methods

·        Ocean (paleo) (De)oxygenation

·        Isotopic Fractionation Processes

 

Professional Affiliations

 

·        Associate Professor (July 2020 - present) at PRL, Ahmedabad, India

·        Reader (December 2015 – June 2020) at PRL, Ahmedabad, India

·        Post-doctoral Fellow (May 2013 - December 2015) at GEOMAR, Kiel, Germany

·        Post-doctoral Fellow (September 2011 - April 2013) at University of Gothenburg, Sweden

·        NF-POGO Scholar (August 2011 - May 2012) at Bermuda Institute of Ocean Sciences (BIOS), Bermuda

·        Post-doctoral Fellow (February 2011 - August 2011) at PRL, Ahmedabad, India

·        POGO-SCOR Scholar (September 2009 - November 2009) at Max Plank Institute for Marine Microbiology (MPIMM), Bremen, Germany

·        Research Fellow (July 2006 - January 2011) at PRL, Ahmedabad, India

·        Project Associate (January 2005 - June 2006) at PRL, Ahmedabad, India

 

Awards

·      Indian National Science Academy (INSA) Associate Fellow (2023)

·      DST-Swarnajayanti Fellowship (2020-2021)

·      Member, Indian National Young Academy of Sciences (INYAS) (2021-2025)

·      Young Researcher Award, Ministry of Earth Sciences, India (2020)

·      Indian Geophysical Union (IGU) – Krishnan Medal (2020)

·      Associate, Indian Academy of Sciences (IASc), Bengaluru (2017-2020)

·      INSPIRE faculty fellowship, DST India (2015-2020)

·      DFG (Leibniz-Preis) Post-doctoral fellowship (May 2015 - April 2016)

·      Sonderforschungsbereich ‘(SFB-754)’ Post-doctoral fellowship (October 2014 - April 2015)

·      Cluster of Excellence ‘The Future Ocean’ Post-doctoral fellowship (May 2013 - October 2014)

·      Gothenburg University Post-doctoral fellowship (March 2013 - April 2013)

·      Swedish Institute Post-doctoral fellowship (September 2011 - February 2013)

·      NF-POGO Center of Excellence 2011 fellowship for participating in a ten months Observational Oceanography training programme at BIOS, Bermuda

·      POGO-SCOR fellowship (2009) to work at MPIMM, Bremen Germany during September-November 2009

 

Professional Services

 

·        Editor: JGR: Oceans (an AGU journal) (July 2021 – present)

·        Editor: Ocean Science (an EGU journal) (June 2020 – June 2021)

·        Member: International Implementation Committee of BioGeoScapes (2024 – present)

·        Member: Scientific Steering Committee of SOLAS (Surface Ocean Lower Atmosphere Study) (2022-2024)

·        Member: AGU’s Diversity, Equity, Inclusion, and Accessibility (DEIA) committee (2022-present)

·        Member: National Committee for Scientific Committee on Oceanic Research (SCOR, 2024-2027)

·        Member: Board of Studies, Pandit Deendayal Petroleum University, India (2020 - present)

·        Member: Board of Studies, Geology Department, Gujarat University, India (2019 - present)

·        Visiting faculty, Department of Climate Change, Gujarat University (2016 - present)

·        Chairperson (2018 – 2022) and Founding member of the Early Career Scientists Network of IIOE-2

·        Founding member (2018 - 2021) of the early career researchers network of IAPSO

·        Member: International Science Planning Committee of IIOSC-2022 at Goa

·        Co-convener of EGU General Assembly-2019-2022 session on Air-sea Chemical Fluxes

 

Peer-Reviewed Journal Articles

 

1.      Mehta, S., R. Kiko, H. Hauss, N. Ojha, and A. Singh (2024), Phosphate influx and dust deposition create zonal and meridional biogeochemical gradients in Trichodesmium abundance. Global Biogeochemical Cycles, 38(8), e2024GB008182.

2.      Sahoo, D., H. Saxena, S. Nazirahmed, M. Khan, D. Rai, N. Sharma, S. John, S. Kumar, A. K. Sudheer, R. Bhushan, and A. Singh (2024). Winter convective mixing regulates oceanic C: N: P ratios. Limnology and Oceanography, 69(8), 1720-1733.

3.      Sarkar, S., A. Rahman, M. Khan, A. Rathi, P. Ragavan, A. Singh, and S. Kumar (2024). Isotopic evidence for degradation of particulate black carbon in the ocean. Geophysical Research Letters, 51(9), e2023GL106050.

4.      Lachkar, Z., M. Cornejo-D'Ottone, A. Singh, J. Arístegui, B. Dewitte, S. Fawcett, V. Garçon, E. Lovecchio, V. Molina, and P. N. M. Vinayachandran (2024), Biogeochemistry of greenhouse gases in coastal upwelling systems: Processes and sensitivity to global change. Elementa: Science of the Anthropocene 12 (1).

5.      Chowdhury, S., H. Berthelot, C. Baudet, D. González-Santana, C. Reeder, S. l'Helguen, J. Maguer, C. Löscher, A. Singh, S. Blain, N. Cassar, S. Bonnet, H. Planquette, and M. Benavides (2024), Fronts divide diazotroph communities in the Southern Indian Ocean. FEMS Microbiology Ecology, 100(8), p.fiae095.

6.      Saxena, H., D. Sahoo, S. Nazirahmed, N. Sharma, D. Rai, S. Kumar, and A. Singh, A. (2024). Winter convective mixing mediating coupling of N‐gain and‐loss in the Arabian Sea. Journal of Geophysical Research: Oceans, 129(5), e2023JC020839.

7.      Xenopoulos, M. A., B. Bond‐Lamberty, A. Desai, D. Huntzinger, P. Buchanan, A. East, A. Singh, P. Wooden, K. Jewett, and M. Ricci (2024). AGU publications updates authorship policy to foster greater equity and transparency in global research collaborations. AGU Advances, 5(3), e2024AV001298.

8.      AGU Editorial Network. (2024). Challenges Facing Scientific Publishing in the Field of Earth & Space Sciences. AGU Advances, 5(4), e2024AV001334.

9.      Kumar, P.K., A. Singh, and R. Ramesh (2023), Convective mixing and transport of the Bay of Bengal water stir the δ¹⁸O-salinity relation in the Arabian Sea. Journal of Marine Systems, 238, 103842, doi://10.1016/j.jmarsys.2022.103842

10.  Saxena, H., D. Sahoo, S. Nazirahmed, D. Chaudhari, P. Rahi, S. Kumar, M. Benavides, A.V. Krishna, A.K. Sudheer, and A. Singh (2023), The Bay of Bengal: An Enigmatic Diazotrophic Niche. Journal of Geophysical Research: Biogeosciences, doi:// 10.1029/2023JG007687

11. Chowdhury, S., E. Raes, C. Hörstmann, A. Ahmed, C. Ridame, N. Metzl, P.S. Bhavya, T. Sato, T. Shiozaki, S. Bonnet, C.R. Löscher, A. Singh, and M. Benavides (2023), Diazotrophy in the Indian Ocean: Current understanding and future perspectives. Limnology and Oceanography Letters, 8(5), doi://10.1002/lol2.10343

12. Iglesias-Rodríguez, M.D., R.E. Rickaby, A. Singh, and J.A. Gately (2023), Laboratory experiments in ocean alkalinity enhancement research. State of the Planet, doi:///10.5194/sp-2-oae2023-5-2023

13. Saxena, H., and A. Singh (2023). Primary Production and Its Governing Factors in the Northern Indian Ocean. In Dynamics of Planktonic Primary Productivity in the Indian Ocean (pp. 149-168). Cham: Springer International Publishing.

14. Shao, Z., Y. Xu, Y.,.. A. Singh, et al. (2023), Global oceanic diazotroph database version 2 and elevated estimate of global oceanic N₂ fixation, Earth System Science Data, doi://10.5194/essd-15-3673-2023

15. Saxena, H., D. Sahoo, S. Nazirahmed, D. Rai, A. Khan, N. Sharma, S. Kumar, and A. Singh (2022), Contribution of Carbon Fixation towards Carbon Sink in the Ocean Twilight Zone. Geophysical Research Letters, doi://10.1029/2022GL099044

16. Khan, A., A. Rahman, D. Sahoo, H. Saxena, A. Singh, and S. Kumar (2022), Nitrous oxide in the central Bay of Bengal during the summer monsoon. Regional Studies in Marine Science, 52, 102314, doi://10.1016/j.rsma.2022.102314

17. Kumar, A., G. Shukla, and A. Singh (2022), Long Range Global Transport of Dust and Characterization of Dust, In Asian Atmospheric Pollution, pp. 483-504, Elsevier, doi://10.1016/B978-0-12-816693-2.00012-3.

18. Varna, M., A. Singh, D. Sahoo, and D. Sengupta (2021), Strengthening of basin-scale ocean currents in winter drives decadal salinity decline in the eastern Arabian Sea. Geophysical Research Letters, 48, e2021GL094516.

19. Sahoo, D., H. Saxena, S. Nazirahmed, S. Kumar, A. Sudheer, R. Bhushan, A. Sahay, and A. Singh (2021), Role of eddies and N₂ fixation in regulating C:N:P proportions in the Bay of Bengal. Biogeochemistry, doi://10.1007/s10533-021-00833-4

20. Rahman, A., A. Khan, A. Singh, and S. Kumar (2021), Hydrological characteristics of the Bay of Bengal water column using δ¹⁸O during the Indian summer monsoon. Continental Shelf Research, 226, 104491, doi://10.1016/j.csr.2021.104491

21. Singh, A., L. Bach, C. Löscher, A. Paul, N. Ojha, and U. Riebesell (2021), Impact of increasing carbon dioxide on dinitrogen and carbon fixation rates under oligotrophic conditions and simulated upwelling. Limnology and Oceanography, 66(7), 2855-2867, doi://10.1002/lno.11795

22. Singh, A. and P. Chaturvedi (2021), Error Propagation. Resonance, doi://10.1007/s12045-021-1185-1

23. Kumar, P.K. and A. Singh (2021), Increase in summer monsoon rainfall over the northeast India during El Niño years since 1600, Climate Dynamics, 57, 851-863, doi:10.1007/s00382-021-05743-7.

24. Mehta, S., A. Singh and K. Thirumalai (2021), Uncertainty in palaeosalinity estimates from foraminiferal geochemical records in the northern Indian Ocean. Palaeogeography, Palaeoclimatology, Palaeoecology, 569, 110326

25. Vinayachandran, P.N.M., Y. Masumoto, M. Roberts, J. Hugget, I. Halo, A. Chatterjee, P. Amol, G.V.M. Gupta, A. Singh, A. Mukherjee, S. Prakash, L. Beckley, E. Raes, and R. Hood (2021), Reviews and syntheses: Physical and biogeochemical processes associated with upwelling in the Indian Ocean, Biogeosciences, 18, 5967–6029, doi:10.5194/bg-18-5967-2021

26. Phillips, H.E., A. Tandon, R. Furue, R. Hood, C. Ummenhofer, J. Benthuysen, V. Menezes, S. Hu, B. Webber, A. Franks, D. Cherian, E. Shroyer, M. Feng, H. Wijeskera, A. Chatterjee, L. Yu, J. Hermes, R. Murtugudde, T. Tozuka, D. Su, A. Singh, L. Centurioni, S. Prakash and J. Wiggert , 2021, Progress in understanding of Indian Ocean circulation, variability, air–sea exchange, and impacts on biogeochemistry, Ocean Science, 17, 1677–1751, doi:10.5194/os-17-1677-2021

27. Rixen, T., G. Cowie, B. Gaye, J. Goes, H.R. Gomes, R.R. Hood, Z. Lachkar, H. Schmidt, J. Segschneider, and A. Singh (2020), Reviews and syntheses: Present, past, and future of the oxygen minimum zone in the northern Indian Ocean. Biogeosciences, 17, 6051-6080, doi:10.5194/bg-17-6051-2020

28. Sahoo, D., H. Saxena, N. Tripathi, A. Khan, A. Rahaman, S. Kumar, A. Sudheer, and A. Singh (2020), Non-Redfieldian C:N:P ratio in the inorganic and organic pools of the Bay of Bengal during the summer monsoon. Marine Ecology Progress Series, 653, 41–55, doi:10.3354/meps13498

29. Tripathi, N., L. Sahu, A. Singh, R. Yadav, A. Patel, K. Patel, and P. Meenu. (2020), Elevated levels of biogenic non‐methane hydrocarbons in the marine boundary layer of the Arabian Sea during the inter‐monsoon. Journal of Geophysical Research: Atmospheres, 125, e2020JD032869. doi:10.1029/2020JD032869

30. Saxena, H., D. Sahoo, M. A. Khan, S. Kumar, A. K. Sudheer, and A. Singh (2020), Dinitrogen Fixation Rates in the Bay of Bengal during Summer Monsoon, Environmental Research Communications, 2, 051007, doi:10.1088/2515-7620/ab89fa

31. Tripathi, N., L. K. Sahu, A. Singh, R. Yadav, and K. K. Karati (2020), High levels of isoprene in the marine boundary layer of Arabian Sea during spring inter-monsoon: Role of phytoplankton blooms, ACS Earth and Space Chemistry, 4(4), 583-590, doi:10.1021/acsearthspacechem.

32. Thajudeen, J., P. V. Vipindas, Y. Jesmi, V. Sudheesh, P. M. Parambath, A. Singh, and M. A. Hatha (2020), Nutrient stoichiometry (N:P) controls nitrogen fixation and distribution of diazotrophs in a tropical eutrophic estuary, Marine Pollution Bulletin, 15, 110799, doi:10.1016/j.marpolbul.2019.110799

33. Singh, A., N. Gandhi, and R. Ramesh, (2019), Surplus supply of bioavailable nitrogen through N₂ fixation to primary producers in the eastern Arabian Sea during autumn, Continental Shelf Research, 181, 103–110

34. Hermes, J. C., Y. Masumoto, L. Beal, …, A. Singh et al. (2019), A sustained ocean observing system in the Indian Ocean for climate related scientific knowledge and societal needs, Frontiers in Marine Science, 6:355.

35. Suntharalingam, P., L. M. Zamora, H. W. Bange, S. Bikkina, E. Buitenhuis, M. Kanakidou, J. F. Lamarque, A. Landolfi, L. Resplandy, M.M. Sarin, S. Seitzinger, and A. Singh (2019), Anthropogenic nitrogen inputs and impacts on oceanic N₂O fluxes in the northern Indian Ocean: The need for an integrated observation and modelling approach, Deep Sea Research II, doi:10.1016/j.dsr2.2019.03.007

36. Kumar, P. K., A. Singh, and R. Ramesh (2018), Controls on δ¹⁸O, δD and δ¹⁸O-salinity relationship in the northern Indian Ocean, Marine Chemistry, 207, 55-62, doi:10.1016/j.marchem.2018.10.010

37. Kumar, S., P. S. Bhavya, R. Ramesh, G. V. M. Gupta, F. Chiriboga, A. Singh, I. Karunasagar, A. Rai, A. Rehnstam-Holm, L. Edler, and A. Godhe (2018), Nitrogen uptake potential under different temperature-salinity conditions: Implications for nitrogen cycling under climate change scenarios, Marine Environmental Research, doi:10.1016/j.marenvres.2018.09.001

38. Singh, A., L. T. Bach, T. Fischer, H. Hauss, R. Kiko, A. J. Paul, P. Stange, P. Vandromme, and U. Riebesell (2017), Niche construction by non-diazotrophs for N₂ fixers in the eastern tropical North Atlantic Ocean, Geophysical Research Letters, 44, doi:10.1002/2017GL074218

39. Baker, A. R., M. Kanakidou, K. Altieri, N. Daskalakis, G. Okin, S. Myriokefalitakis, F. Dentener, M. Uematsu, M M. Sarin, R. Duce, J. Galloway, W. Keene, A. Singh, L. Zamora, J. Lamarque, S. Hsu, S. Rohekar, S., and J. Prospero (2017), Observation-and model-based estimates of particulate dry nitrogen deposition to the oceans, Atmospheric Chemistry and Physics, 17(13), 8189-8210, doi:10.5194/acp-17-8189-2017

40. Kumar, P. K., A. Singh, R. Ramesh and T. Nallathambi T (2017), N₂ Fixation in the Eastern Arabian Sea: Probable Role of Heterotrophic Diazotrophs. Front. Mar. Sci., 4:80. doi: 10.3389/fmars.2017.00080

41. Jickells. T., K. Altieri, E. Buitenhuis, A. Baker, D. Capone, R. Duce, F. Dentener, K. Fennel, M. Kanakidou, J. LaRoche, K. Lee, P. Liss, J. Middelburg, K. Moore, G. Okin, A. Oschlies, M. M. Sarin, S. Seitzinger, J. Sharples, A. Singh, P. Suntharalingam, M. Uematsu, and L. Zamora (2017), A reevaluation of the magnitude and impacts of anthropogenic atmospheric nitrogen inputs on the ocean, Global Biogeochemical Cycles, 31(2), 289-305

42. Thajudeen, J., J. Yousuf, V. P. Veetil, S. Varghese, A. Singh, and M. H. Abdulla (2017), Nitrogen fixing bacterial diversity in a tropical estuarine sediments, World Journal of Microbiology and Biotechnology, 33(2), 41

43. Olofsson, M., J. Egardt, A. Singh, and H. Ploug (2016), Inorganic phosphorus enrichments in Baltic Sea water have large effects on growth, carbon fixation, and N₂ fixation by Nodularia spumigena. Aquatic Microbial Ecology, 77(2), 111-123

44. Singh, A., Kürten, B., Cedras,  R., Fernandes, M., N. Kumar and 41 authors (2016), Perspectives on future Indian Ocean research from early career scientists, Current Science, 111 (11), 1741-1742

45.  Kahlon, G. K., S. Kumar, A. Rehnstam-Holm, A. Rai, P. S. Bhavya, L. Edler, A. Singh, B. Andersson, I. Karunasagar, R. Ramesh, and A. Godhe (2016), Response of a coastal tropical pelagic microbial community to changed salinity and temperature, Aquatic Microbial Ecology, 77(1), 37-50, doi:10.3354/ame01785

46. Singh, A., S. E. Baer, U. Riebesell, A. C. Martiny, and M. W. Lomas (2015), C:N:P stoichiometry at the Bermuda Atlantic Time-series Study station in the North Atlantic Ocean, Biogeosciences, 12, 6389-6403, doi:10.5194/bg-12-6389-2015

47. Löscher, C. R., M. A. Fischer, S. C. Neulinger, B. Fiedler, M. Philippi, F. Schütte, A. Singh, H. Hauss, J. Karstensen, A. Körtzinger, S. Künzel, and R. A. Schmitz (2015), Hidden biosphere in an oxygen-deficient Atlantic open-ocean eddy: future implications of ocean deoxygenation on primary production in the eastern tropical North Atlantic, Biogeosciences, 12, 7467-7482, doi:10.5194/bg-12-7467-2015

48. Singh, A., and R. Ramesh (2015), Environmental controls on New and Primary Production in the Northern Indian Ocean, Progress in Oceanography, 131, 138-145, doi:10.1016/j.pocean.2014.12.006

49. Singh, A., N. Gandhi, R. Ramesh, and S. Prakash (2015), Role of Cyclonic Eddy in enhancing Primary and New production in the Bay of Bengal, Journal of Sea Research, 97, 5-13, doi:10.1016/j.seares.2014.12.002

50. Singh, A., A. Mohiuddin, R. Ramesh, and S. Raghav (2014), Estimating the Loss of Himalayan Glaciers under Global Warming Using the δ¹⁸O-Salinity Relation in the Bay of Bengal, Environmental Science and Technology Letters, 1(5), 249-253, doi:10.1021/ez500076z; (ACS Editors’ Choice Publication, Seawater Survey Traces Loss of Himalayan Glaciers)

51. Singh, A., K. Hårding, H. R. V. Reddy, and A. Godhe (2014), An assessment of Dinophysis blooms in the coastal Arabian Sea, Harmful Algae, 34, 29-35, doi: 10.1016/j.hal.2014.02.006

52. Singh, A., R. Ramesh, and A. Godhe (2014), Inter- and intra-specific carbon and nitrogen assimilation by cultured dinoflagellate and diatom species in an isotopic enrichment culture experiment, Current Science, 106 (6), 867-870

53. Singh, A., M. W. Lomas, and N. R. Bates (2013), Revisiting N₂ fixation in the North Atlantic Ocean: Significance of deviations from the Redfield Ratio, atmospheric deposition and climate variability, Deep Sea Research, Part II, 93, 148-158. doi:10.1016/j.dsr2.2013.04.008i

54. Singh, A., N. Gandhi, and R. Ramesh (2012), Contribution of atmospheric nitrogen deposition to new production in the nitrogen limited photic zone of the northern Indian Ocean, Journal of Geophysical Research: Oceans,117 (C6), doi:10.1029/2011JC007737

55. Gandhi, N., A. Singh, S. Prakash, R. Ramesh, Mini Raman, M. S. Sheshshayee, and S. Shetye (2011), First direct N₂ fixation measurements during a Trichodesmium bloom in the eastern Arabian Sea, Global Biogeochemical Cycles, 25 (4), doi:10.1029/2010GB003970

56. Thirumalai, K., A. Singh, and R. Ramesh (2011), A MATLAB^TM code to perform weighted linear regression with (correlated or uncorrelated) errors in bivariate data, Journal of the Geological Society of India, 77, 377-380.

57. Singh, A., and R. Ramesh (2011), Contribution of riverine dissolved inorganic nitrogen flux to new production in the coastal northern Indian Ocean - an assessment, International Journal of Oceanography, vol 2011, doi: 10.1155/2011/983561

58. Singh, A., R. A. Jani, and R. Ramesh (2010), Spatiotemporal variations of the δ¹⁸O-salinity relation in the northern Indian Ocean, Deep Sea Research, Part I, 57(11), 1422-1431, doi:10.1016/j.dsr.2010.08.002.

59. Gandhi, N., A. Singh, R. Ramesh, and M. S. Sheshshayee (2010), Nitrogen sources for new production in the NE Indian Ocean, Advances in Geosciences, 24, 55-67.

60. Ramesh, R., and A. Singh (2010), Isotopic fractionation in open systems: application to organic matter decomposition in ocean and land, Current Science, 98(3), 406-411.