Amal Jayakumar

6.3k citations

73 papers · 5.1k · 2 hit papers · h-index 40

Impact in

Oceanography top 0.2%
- Marine and coastal ecosystems
- Oceanographic and Atmospheric Processes
Pollution top 0.5%
- Wastewater Treatment and Nitrogen Removal

Papers in

Oceanography 55
- Marine and coastal ecosystems 54
Pollution 25
- Wastewater Treatment and Nitrogen Removal 25

Co-authors: Bess B. Ward (45 shared papers)S.W.A. Naqvi (20 shared papers)Allan H. Devol (10 shared papers)P.V. Narvekar (12 shared papers)Hema Naik (9 shared papers)Tadashi Yoshinari (6 shared papers)Jay A. Brandes (4 shared papers)Andrew R. Babbin (6 shared papers)
Journals: Limnology and Oceanography (7 papers)Marine Chemistry (6 papers)Biogeosciences (6 papers)The ISME Journal (5 papers)Frontiers in Microbiology (4 papers)
Partner nations: United States India Switzerland

In The Last Decade

Amal Jayakumar

72 papers receiving 5k citations

Amal Jayakumar's Hit Papers

align trajectories log scale

Denitrification as the dominant nitrogen loss process in the Arabian Sea 2009 · 446 citations

What are hit papers?

Paper score: A paper's citations measured against the top-1% bar of its own field and year: the square root of citations ÷ bar, so 1 means right at the bar and 2 means four times its citations. The bar blends the citation counts that enter the top 1% of the paper's subfields in its year (weighted 89.5%), of those subfields over all years (0.5%) and of its year across all fields (10%); a subfield and year with fewer than 400 papers takes its year's bar. Papers from 2026 are not scored yet: in an unfinished year, when a paper appeared matters more than how it is cited.

Hit paper: A paper cited at least 1.5× the top-1% bar of its field and year: a paper score of at least √1.5.

2009 Nature
2000 Nature

Peers

Countries citing papers authored by Amal Jayakumar

Since Specialization

Citations

This map shows the geographic impact of Amal Jayakumar's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by Amal Jayakumar with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Amal Jayakumar more than expected).

Fields of papers citing papers by Amal Jayakumar

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Amal Jayakumar. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by Amal Jayakumar. The network helps show where Amal Jayakumar may publish in the future.

Co-authors

The 25 scholars most cited alongside Amal Jayakumar, linked wherever they have co-authored with each other. Click a name or a connecting line to browse the papers they share.

Border = papers with Amal Jayakumar Line = papers co-authored together Amal Jayakumar links everyone, so they are left out of the graph.

All Works

Sort: Min cites: Since: Top N: Style:

20 of 20 papers shown

Showing the 20 most-cited of 73 papers — load more, or switch the sort, to bring in the rest.

#	Work
1	Increased marine production of N2O due to intensifying anoxia on the Indian continental shelf Nature ·S.W.A. Naqvi, Amal Jayakumar, P.V. Narvekar, Hema Naik, V. V. S. S. Sarma, Witty D’Souza, Sudheer Joseph +1 other Hit paper breakdown →	2000	538
2	Denitrification as the dominant nitrogen loss process in the Arabian Sea Nature ·Bess B. Ward, Allan H. Devol, Jeremy J. Rich, Bonnie X. Chang, Silvia E. Bulow, Hema Naik, Anil Kiran Pratihary, Amal Jayakumar Hit paper breakdown →	2009	446
3	Isotopic composition of nitrate in the central Arabian Sea and eastern tropical North Pacific: A tracer for mixing and nitrogen cycles Limnology and Oceanography ·Jay A. Brandes, Allan H. Devol, Tadashi Yoshinari, Amal Jayakumar, S.W.A. Naqvi	1998	332
4	Budgetary and biogeochemical implications of N2O isotope signatures in the Arabian Sea Nature ·S.W.A. Naqvi, Tadashi Yoshinari, Amal Jayakumar, Mark A. Altabet, P.V. Narvekar, Allan H. Devol, Jay A. Brandes, Louis A Codispoti	1998	227
5	Coastal versus open-ocean denitrification in the Arabian Sea Biogeosciences ·S.W.A. Naqvi, Hema Naik, Anil Kiran Pratihary, Witty D’Souza, P.V. Narvekar, Amal Jayakumar, Allan H. Devol, Tadashi Yoshinari	2006	161
6	Rapid nitrous oxide cycling in the suboxic ocean Science ·Andrew R. Babbin, Daniele Bianchi, Amal Jayakumar, Bess B. Ward	2015	150
7	Environmental factors determining ammonia‐oxidizing organism distribution and diversity in marine environments Environmental Microbiology ·Nicholas Bouskill, Damien Eveillard, Diana M. Chien, Amal Jayakumar, Bess B. Ward	2011	143
8	Reduced isotope fractionation by denitrification under conditions relevant to the ocean Geochimica et Cosmochimica Acta ·K. Kritee, Daniel M. Sigman, Julie Granger, Bess B. Ward, Amal Jayakumar, Curtis Anthony Deutsch	2012	129
9	Nitrous oxide production by nitrification and denitrification in the Eastern Tropical South Pacific oxygen minimum zone Geophysical Research Letters ·Qixing Ji, Andrew R. Babbin, Amal Jayakumar, Sergey Oleynik, Bess B. Ward	2015	124
10	Denitrification rates and excess nitrogen gas concentrations in the Arabian Sea oxygen deficient zone Deep Sea Research Part I Oceanographic Research Papers ·Allan H. Devol, A.G. Uhlenhopp, S.W.A. Naqvi, Jay A. Brandes, Amal Jayakumar, Hema Naik, Steve Gaurin, Louis A Codispoti	2006	120
11	Hydrochemistry of the Bay of Bengal: possible reasons for a different water-column cycling of carbon and nitrogen from the Arabian Sea Marine Chemistry ·Ch Kesava Rao, S.W.A. Naqvi, M. Dileep Kumar, S.J.D. Varaprasad, Amal Jayakumar, S.Y.S. Singbal +1 other	1994	114
12	Organic carbon, and not copper, controls denitrification in oxygen minimum zones of the ocean Deep Sea Research Part I Oceanographic Research Papers ·Bess B. Ward, Caroline B. Tuit, Amal Jayakumar, Jeremy J. Rich, James W. Moffett, S.W.A. Naqvi	2008	107
13	The Arabian Sea as a high-nutrient, low-chlorophyll region during the late Southwest Monsoon Biogeosciences ·S.W.A. Naqvi, James W. Moffett, Mangesh Gauns, P.V. Narvekar, Anil Kiran Pratihary, Hema Naik, Damodar M. Shenoy, Amal Jayakumar	2010	103
14	SEASONAL OXYGEN DEFICIENCY OVER THE WESTERN CONTINENTAL SHELF OF INDIA Kluwer Academic Publishers eBooks ·S.W.A. Naqvi, Hema Naik, Amal Jayakumar, M.S. Shailaja, P.V. Narvekar	2006	100
15	Ammonia and nitrite oxidation in the Eastern Tropical North Pacific Global Biogeochemical Cycles ·Xuefeng Peng, Clara A. Fuchsman, Amal Jayakumar, Sergey Oleynik, Willm Martens‐Habbena, Allan H. Devol, Bess B. Ward	2015	98
16	Diversity of nitrite reductase genes (nirS) in the denitrifying water column of the coastal Arabian Sea Aquatic Microbial Ecology ·Amal Jayakumar, Christopher A. Francis, SWA Naqvi, BB Ward	2004	97
17	A sink for atmospheric carbon dioxide in the northeast Indian Ocean Journal of Geophysical Research Atmospheres ·M. Dileep Kumar, S.W.A. Naqvi, Amal Jayakumar +1 other	1996	94
18	Methane in coastal and offshore waters of the Arabian Sea Marine Chemistry ·Amal Jayakumar, S.W.A. Naqvi, P.V. Narvekar +1 other	2001	94
19	Denitrifying Bacterial Community Composition Changes Associated with Stages of Denitrification in Oxygen Minimum Zones Microbial Ecology ·Amal Jayakumar, Gregory D. O'Mullan, S.W.A. Naqvi, Bess B. Ward	2009	94
20	Oxygen minimum zone of the open Arabian Sea: variability of oxygen and nitrite from daily to decadal timescales Biogeosciences ·Karl Banse, S.W.A. Naqvi, P.V. Narvekar, James R. Postel, Amal Jayakumar	2014	92

About Amal Jayakumar

Amal Jayakumar is a scholar working on Oceanography, Pollution, Ecology, Soil Science and Environmental Chemistry, having authored 73 papers that have together received 5.1k indexed citations. Recurring topics across this work include Marine and coastal ecosystems (54 papers), Microbial Community Ecology and Physiology (27 papers), Wastewater Treatment and Nitrogen Removal (25 papers), Soil Carbon and Nitrogen Dynamics (6 papers), Methane Hydrates and Related Phenomena (2 papers), Marine and fisheries research (1 paper), Mercury impact and mitigation studies (1 paper) and Isotope Analysis in Ecology (1 paper). The work is most often cited by research in Oceanography (3.2k citations), Pollution (1k citations), Ecology (1.4k citations), Environmental Chemistry (400 citations) and Paleontology (327 citations). Amal Jayakumar has collaborated with scholars based in United States, India and Switzerland. Frequent co-authors include Bess B. Ward, S.W.A. Naqvi, Allan H. Devol, P.V. Narvekar, Hema Naik, Tadashi Yoshinari, Jay A. Brandes, Andrew R. Babbin, Anil Kiran Pratihary and V. V. S. S. Sarma. Their work appears in journals such as Limnology and Oceanography, Marine Chemistry, Biogeosciences, The ISME Journal and Frontiers in Microbiology.

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

Explore authors with similar magnitude of impact

Amal Jayakumar

Impact in

Papers in i

In The Last Decade

Amal Jayakumar

Amal Jayakumar's Hit Papers

Peers

Countries citing papers authored by Amal Jayakumar

Fields of papers citing papers by Amal Jayakumar

All Works

About Amal Jayakumar

Explore authors with similar magnitude of impact

Papers in