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Marine Nitrogen Cycle
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Ocean Biogeochemistry
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Marine C:N:P
Stoichiometry
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Anthropogenic Impacts
on Marine Nitrogen Cycling
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Climate Change
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Isotopic
Fractionation Processes
Professional Affiliations
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Member,
Indian National Young Academy of Sciences (INYAS) (2021-2025)
·
Young
Researcher Award, Ministry of Earth Sciences, India (2020)
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Indian
Geophysical Union (IGU) – Krishnan Medal (2020)
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Associate,
Indian Academy of Sciences (IASc), Bengaluru
(2017-2020)
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INSPIRE
faculty fellowship, DST India (2015-2020)
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Alexander
von Humboldt Researcher Alumni fellowship (January 2015)
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DFG
(Leibniz-Preis) Post-doctoral fellowship (May 2015 -
April 2016)
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Sonderforschungsbereich
‘(SFB-754)’ Post-doctoral fellowship (October 2014 - April 2015)
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Cluster of Excellence
‘The Future Ocean’ Post-doctoral fellowship (May 2013 - October 2014)
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Gothenburg
University Post-doctoral fellowship (March 2013 - April 2013)
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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
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POGO-SCOR
fellowship (2009) to work at MPIMM,
Professional Services
·
Topic
Editor: Ocean Science (an EGU journal) (June 2020 – present)
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Review
Editor: Frontiers in Marine Science (2015 – present)
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Member:
Board of Studies, Pandit Deendayal
Petroleum University, India (2020 - present)
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Member:
Board of Studies, Geology Department, Gujarat University, India (2019 -
present)
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Visiting
faculty, Department of Climate Change, Gujarat University (2016 - present)
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Chairperson
(2018 – present) and Founding member of Early Career Scientists Network of
IIOE-2
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Founding
member (2018 - present) of early career researchers network of IAPSO
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Member:
International Science Planning Committee of IIOSC-2020 at Goa
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Co-convener
of EGU General Assembly-2019 & 2020 session on Air-sea Chemical Fluxes
Peer-Reviewed Journal Articles
1. Kumar, P.K. and A. Singh (2021),
Increase in summer monsoon rainfall over the northeast India during El Niño
years since 1600, Climate Dynamics,
doi:10.1007/s00382-021-05743-7.
2. 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
3. Vinayachandran, P.N.M., Y. Masumoto, M.
Roberts, J. Hugget, I. Halo, A. Chatterjee, P. Amol, G.V.M. Gupta, A. Singh, A. Mukherjee, and S. Prakash (2021),
Reviews and syntheses: Physical and biogeochemical processes associated with
upwelling in the Indian Ocean. Biogeosciences
Discussions, doi:10.5194/bg-2020-486
4. 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
Discussions, doi:10.5194/os-2021-1
5. 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
6. 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
7. 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
8. 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
9. 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.
10. 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
11. 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
12. 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.
13. 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
14. 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
15. 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
16. 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
17. 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
18. 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
19. 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
20. 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
21. 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
22. 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
23. 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
24. 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
25. 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
26. 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
27. 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
28. 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)
29. 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
30. 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
31. 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
32. 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
33. 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
34. Thirumalai, K., A. Singh, and R. Ramesh (2011), A MATLABTM code to perform weighted linear
regression with (correlated or uncorrelated) errors in bivariate data, Journal of the Geological
Society of India, 77,
377-380.
35. 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
36. 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.
37. 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.
38. 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.