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Environmental Sciences
USA
2026

D-Index & Metrics

Discipline name D-Index World Ranking Current World Ranking National Ranking Current National Ranking Publications Citations
Environmental Sciences 137 54 51 21 19 552 73972

David M. Karl publications per year

The chart shows the history of publications by David M. Karl between 1975 and 2026, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. David M. Karl published across 52 years, from 1975 to 2026, averaging 12.1 papers a year. Output peaked at 40 publications in 2013. 15 of the 631 publications appeared in the last two years.

No. of publications
10 20 30 40
Bar chart. Horizontal axis: year, 1975 to 2026. Vertical axis: number of publications, 0 to 40. Peak 40 publications in 2013. 1975: 1 publication 1976: 2 publications 1977: 1 publication 1978: 7 publications 1979: 4 publications 1980: 4 publications 1981: 7 publications 1982: 2 publications 1983: 3 publications 1984: 12 publications 1985: 3 publications 1986: 8 publications 1987: 6 publications 1988: 3 publications 1989: 6 publications 1990: 5 publications 1991: 12 publications 1992: 6 publications 1993: 6 publications 1994: 9 publications 1995: 11 publications 1996: 11 publications 1997: 7 publications 1998: 9 publications 1999: 13 publications 2000: 9 publications 2001: 20 publications 2002: 25 publications 2003: 16 publications 2004: 11 publications 2005: 10 publications 2006: 13 publications 2007: 14 publications 2008: 17 publications 2009: 16 publications 2010: 16 publications 2011: 10 publications 2012: 22 publications 2013: 40 publications 2014: 20 publications 2015: 16 publications 2016: 19 publications 2017: 14 publications 2018: 14 publications 2019: 23 publications 2020: 21 publications 2021: 25 publications 2022: 19 publications 2023: 36 publications 2024: 12 publications 2025: 13 publications 2026: 2 publications
1975 2026

631 publications in total across all disciplines

View publications per year as a table
David M. Karl: publications per year, 1975 to 2026
Year Publications
1975 1
1976 2
1977 1
1978 7
1979 4
1980 4
1981 7
1982 2
1983 3
1984 12
1985 3
1986 8
1987 6
1988 3
1989 6
1990 5
1991 12
1992 6
1993 6
1994 9
1995 11
1996 11
1997 7
1998 9
1999 13
2000 9
2001 20
2002 25
2003 16
2004 11
2005 10
2006 13
2007 14
2008 17
2009 16
2010 16
2011 10
2012 22
2013 40
2014 20
2015 16
2016 19
2017 14
2018 14
2019 23
2020 21
2021 25
2022 19
2023 36
2024 12
2025 13
2026 2
Total 631
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David M. Karl publication distribution in Environmental Sciences in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Environmental Sciences in 2026. The highlighted bar marks where David M. Karl sits on this spectrum.

No. of scientists
200 400 600
Bar chart with 66 bars. Horizontal axis: publications, 41–50 to 690+. Vertical axis: number of scientists, 0 to 617. Most scientists, 617, have 121–130 publications. The last bar groups every scientist with 690 publications or more. The highlighted bar, 551–560 publications, is where this scientist sits. 41–50 publications: 21 scientists 51–60 publications: 62 scientists 61–70 publications: 133 scientists 71–80 publications: 257 scientists 81–90 publications: 361 scientists 91–100 publications: 440 scientists 101–110 publications: 492 scientists 111–120 publications: 541 scientists 121–130 publications: 617 scientists 131–140 publications: 544 scientists 141–150 publications: 541 scientists 151–160 publications: 539 scientists 161–170 publications: 444 scientists 171–180 publications: 444 scientists 181–190 publications: 400 scientists 191–200 publications: 377 scientists 201–210 publications: 318 scientists 211–220 publications: 282 scientists 221–230 publications: 263 scientists 231–240 publications: 220 scientists 241–250 publications: 217 scientists 251–260 publications: 180 scientists 261–270 publications: 181 scientists 271–280 publications: 155 scientists 281–290 publications: 130 scientists 291–300 publications: 127 scientists 301–310 publications: 130 scientists 311–320 publications: 85 scientists 321–330 publications: 106 scientists 331–340 publications: 80 scientists 341–350 publications: 83 scientists 351–360 publications: 75 scientists 361–370 publications: 69 scientists 371–380 publications: 52 scientists 381–390 publications: 54 scientists 391–400 publications: 56 scientists 401–410 publications: 44 scientists 411–420 publications: 40 scientists 421–430 publications: 36 scientists 431–440 publications: 25 scientists 441–450 publications: 25 scientists 451–460 publications: 32 scientists 461–470 publications: 29 scientists 471–480 publications: 21 scientists 481–490 publications: 26 scientists 491–500 publications: 26 scientists 501–510 publications: 17 scientists 511–520 publications: 19 scientists 521–530 publications: 15 scientists 531–540 publications: 22 scientists 541–550 publications: 12 scientists 551–560 publications: 15 scientists 561–570 publications: 11 scientists 571–580 publications: 19 scientists 581–590 publications: 9 scientists 591–600 publications: 9 scientists 601–610 publications: 7 scientists 611–620 publications: 11 scientists 621–630 publications: 5 scientists 631–640 publications: 5 scientists 641–650 publications: 6 scientists 651–660 publications: 3 scientists 661–670 publications: 3 scientists 671–680 publications: 4 scientists 681–689 publications: 4 scientists 690+ publications: 100 scientists
41–50 publications 690+

This scientist: 552 publications — 98th percentile

98% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 690 publications or more.

View publications distribution as a table
Number of Environmental Sciences scientists by publication count, Research.com 2026 ranking edition. Based on 9,676 ranked scientists.
Publications Scientists This scientist
41–50 21
51–60 62
61–70 133
71–80 257
81–90 361
91–100 440
101–110 492
111–120 541
121–130 617
131–140 544
141–150 541
151–160 539
161–170 444
171–180 444
181–190 400
191–200 377
201–210 318
211–220 282
221–230 263
231–240 220
241–250 217
251–260 180
261–270 181
271–280 155
281–290 130
291–300 127
301–310 130
311–320 85
321–330 106
331–340 80
341–350 83
351–360 75
361–370 69
371–380 52
381–390 54
391–400 56
401–410 44
411–420 40
421–430 36
431–440 25
441–450 25
451–460 32
461–470 29
471–480 21
481–490 26
491–500 26
501–510 17
511–520 19
521–530 15
531–540 22
541–550 12
551–560 15 552
561–570 11
571–580 19
581–590 9
591–600 9
601–610 7
611–620 11
621–630 5
631–640 5
641–650 6
651–660 3
661–670 3
671–680 4
681–689 4
690+ 100
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David M. Karl D-index placement in Environmental Sciences in 2026

The chart shows the D-index (discipline H-index) distribution of Environmental Sciences scientists ranked by Research.com in 2026. The highlighted bar marks where David M. Karl sits on this spectrum.

No. of scientists
100 200 300
Bar chart with 97 bars. Horizontal axis: D-Index, 30 to 126+. Vertical axis: number of scientists, 0 to 348. Most scientists, 348, have 45 D-Index. The last bar groups every scientist with 126 D-Index or more. The highlighted bar, 126+ D-Index, is where this scientist sits. 30 D-Index: 12 scientists 31 D-Index: 26 scientists 32 D-Index: 51 scientists 33 D-Index: 88 scientists 34 D-Index: 123 scientists 35 D-Index: 163 scientists 36 D-Index: 206 scientists 37 D-Index: 267 scientists 38 D-Index: 265 scientists 39 D-Index: 275 scientists 40 D-Index: 321 scientists 41 D-Index: 343 scientists 42 D-Index: 305 scientists 43 D-Index: 336 scientists 44 D-Index: 330 scientists 45 D-Index: 348 scientists 46 D-Index: 291 scientists 47 D-Index: 275 scientists 48 D-Index: 272 scientists 49 D-Index: 273 scientists 50 D-Index: 263 scientists 51 D-Index: 232 scientists 52 D-Index: 266 scientists 53 D-Index: 217 scientists 54 D-Index: 198 scientists 55 D-Index: 177 scientists 56 D-Index: 202 scientists 57 D-Index: 204 scientists 58 D-Index: 166 scientists 59 D-Index: 177 scientists 60 D-Index: 166 scientists 61 D-Index: 152 scientists 62 D-Index: 143 scientists 63 D-Index: 150 scientists 64 D-Index: 124 scientists 65 D-Index: 119 scientists 66 D-Index: 120 scientists 67 D-Index: 118 scientists 68 D-Index: 82 scientists 69 D-Index: 98 scientists 70 D-Index: 94 scientists 71 D-Index: 105 scientists 72 D-Index: 74 scientists 73 D-Index: 84 scientists 74 D-Index: 70 scientists 75 D-Index: 67 scientists 76 D-Index: 78 scientists 77 D-Index: 60 scientists 78 D-Index: 59 scientists 79 D-Index: 52 scientists 80 D-Index: 47 scientists 81 D-Index: 38 scientists 82 D-Index: 48 scientists 83 D-Index: 42 scientists 84 D-Index: 42 scientists 85 D-Index: 43 scientists 86 D-Index: 29 scientists 87 D-Index: 37 scientists 88 D-Index: 29 scientists 89 D-Index: 30 scientists 90 D-Index: 34 scientists 91 D-Index: 20 scientists 92 D-Index: 22 scientists 93 D-Index: 17 scientists 94 D-Index: 19 scientists 95 D-Index: 24 scientists 96 D-Index: 21 scientists 97 D-Index: 20 scientists 98 D-Index: 24 scientists 99 D-Index: 17 scientists 100 D-Index: 17 scientists 101 D-Index: 21 scientists 102 D-Index: 25 scientists 103 D-Index: 18 scientists 104 D-Index: 26 scientists 105 D-Index: 20 scientists 106 D-Index: 15 scientists 107 D-Index: 10 scientists 108 D-Index: 13 scientists 109 D-Index: 15 scientists 110 D-Index: 12 scientists 111 D-Index: 8 scientists 112 D-Index: 7 scientists 113 D-Index: 9 scientists 114 D-Index: 6 scientists 115 D-Index: 12 scientists 116 D-Index: 7 scientists 117 D-Index: 8 scientists 118 D-Index: 3 scientists 119 D-Index: 5 scientists 120 D-Index: 7 scientists 121 D-Index: 2 scientists 122 D-Index: 4 scientists 123 D-Index: 8 scientists 124 D-Index: 7 scientists 125 D-Index: 9 scientists 126+ D-Index: 92 scientists
30 D-Index 126+

This scientist: 137 D-Index — 99th percentile

99% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 126 D-Index or more.

View D-Index distribution as a table
Number of Environmental Sciences scientists by D-index, Research.com 2026 ranking edition. Based on 9,676 ranked scientists.
D-Index Scientists This scientist
30 12
31 26
32 51
33 88
34 123
35 163
36 206
37 267
38 265
39 275
40 321
41 343
42 305
43 336
44 330
45 348
46 291
47 275
48 272
49 273
50 263
51 232
52 266
53 217
54 198
55 177
56 202
57 204
58 166
59 177
60 166
61 152
62 143
63 150
64 124
65 119
66 120
67 118
68 82
69 98
70 94
71 105
72 74
73 84
74 70
75 67
76 78
77 60
78 59
79 52
80 47
81 38
82 48
83 42
84 42
85 43
86 29
87 37
88 29
89 30
90 34
91 20
92 22
93 17
94 19
95 24
96 21
97 20
98 24
99 17
100 17
101 21
102 25
103 18
104 26
105 20
106 15
107 10
108 13
109 15
110 12
111 8
112 7
113 9
114 6
115 12
116 7
117 8
118 3
119 5
120 7
121 2
122 4
123 8
124 7
125 9
126+ 92 137
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Research.com Recognitions

  • 2026 - Research.com Environmental Sciences in United States Leader Award
  • 2025 - Research.com Environmental Sciences in United States Leader Award
  • 2023 - Research.com Environmental Sciences in United States Leader Award
  • 2015 - Dupont Industrial Biosciences Award in Applied and Environmental Microbiology, American Society for Microbiology
  • 2015 - Fellow of the American Academy of Arts and Sciences
  • 2015 - International Balzan Prize
  • 2006 - Member of the National Academy of Sciences
  • 1999 - Fellow of American Geophysical Union (AGU)

Overview

David M. Karl is affiliated with the University of Hawaii at Manoa in the United States. Their research spans multiple domains within Earth and Planetary Sciences and Environmental Science, with a particular focus on Oceanography and Ecology.

The scientist's primary fields of study include:

  • Earth and Planetary Sciences
  • Environmental Science

Within these fields, their research subfields cover:

  • Oceanography
  • Ecology
  • Molecular Biology
  • Global and Planetary Change
  • Environmental Chemistry

Main topics of their work are:

  • Marine and coastal ecosystems
  • Microbial Community Ecology and Physiology
  • Marine Biology and Ecology Research
  • Isotope Analysis in Ecology
  • Methane Hydrates and Related Phenomena
  • Protist diversity and phylogeny
  • Ocean Acidification Effects and Responses

David M. Karl has published extensively, with frequent venues including:

  • Zenodo (CERN European Organization for Nuclear Research)
  • Limnology and Oceanography
  • Global Biogeochemical Cycles
  • Proceedings of the National Academy of Sciences
  • Nature Communications

Recent publications include:

  • "Microbes and Climate Change: a Research Prospectus for the Future," 2022, mBio
  • "Microbial dynamics of elevated carbon flux in the open ocean's abyss," 2021, Proceedings of the National Academy of Sciences
  • "Anthropogenic Asian aerosols provide Fe to the North Pacific Ocean," 2020, Proceedings of the National Academy of Sciences
  • "Earth at risk: An urgent call to end the age of destruction and forge a just and sustainable future," 2024, PNAS Nexus
  • "Latitudinal constraints on the abundance and activity of the cyanobacterium UCYN-A and other marine diazotrophs in the North Pacific," 2020, Limnology and Oceanography

The scientist has collaborated frequently with colleagues such as Angelicque White, Benedetto Barone, Matthew J. Church, Steve Poulos, and Samuel T. Wilson.

Throughout their career, David M. Karl has received several awards and recognitions, including:

  • Member of the National Academy of Sciences (2006)
  • Fellow of the American Academy of Arts and Sciences (2015)
  • International Balzan Prize (2015)
  • Dupont Industrial Biosciences Award in Applied and Environmental Microbiology, American Society for Microbiology (2015)
  • Fellow of American Geophysical Union (AGU) (1999)

Best Publications

  • Nitrogen cycles: past, present, and future

    J. N. Galloway;F. J. Dentener;D. G. Capone;E. W. Boyer

  • VERTEX: carbon cycling in the northeast Pacific

    John H. Martin;George A. Knauer;David M. Karl;William W. Broenkow

  • The Sorcerer II Global Ocean Sampling Expedition: Northwest Atlantic through Eastern Tropical Pacific

    Douglas B. Rusch;Aaron L Halpern;Granger Sutton;Karla B. Heidelberg;Karla B. Heidelberg

  • Scientists' Warning to Humanity: Microorganisms and Climate Change

    Ricardo Cavicchioli;William J. Ripple;Kenneth N. Timmis;Farooq Azam

  • Archaeal dominance in the mesopelagic zone of the Pacific Ocean

    Markus B. Karner;Edward F. DeLong;David M. Karl

  • Community Genomics Among Stratified Microbial Assemblages in the Ocean's Interior

    Edward F. DeLong;Christina M. Preston;Tracy Mincer;Virginia Rich

  • Present and future global distributions of the marine Cyanobacteria Prochlorococcus and Synechococcus

    Pedro Flombaum;José L. Gallegos;Rodolfo A. Gordillo;José Rincon

  • The role of nitrogen fixation in biogeochemical cycling in the subtropical North Pacific Ocean

    D. Karl;R. Letelier;L. Tupas;J. Dore

  • Phosphate depletion in the western North Atlantic Ocean.

    Jingfeng Wu;William Sunda;Edward A. Boyle;David M. Karl

  • Phytoplankton in the ocean use non-phosphorus lipids in response to phosphorus scarcity.

    Benjamin A. S. Van Mooy;Helen F. Fredricks;Byron E. Pedler;Byron E. Pedler;Sonya T. Dyhrman

  • Dinitrogen fixation in the world's oceans

    D. Karl;A. Michaels;B. Bergman;D.G. Capone

  • Unicellular cyanobacteria fix N2 in the subtropical North Pacific Ocean.

    Jonathan P. Zehr;John B. Waterbury;Patricia J. Turner;Joseph P. Montoya

  • Cellular nucleotide measurements and applications in microbial ecology.

    D M Karl

  • Revisiting Carbon Flux Through the Ocean's Twilight Zone

    Ken O. Buesseler;Carl H. Lamborg;Philip W. Boyd;Phoebe J. Lam

  • The Hawaii Ocean Time-series (HOT) program: Background, rationale and field implementation

    David M. Karl;Roger Lukas

  • Physical and biogeochemical modulation of ocean acidification in the central North Pacific.

    John E. Dore;Roger Lukas;Daniel W. Sadler;Matthew J. Church

  • Quantitative distribution of presumptive archaeal and bacterial nitrifiers in Monterey Bay and the North Pacific Subtropical Gyre.

    Tracy J. Mincer;Matthew J. Church;Lance Trent Taylor;Christina Preston

  • Production of methane and ethylene from plastic in the environment

    Sarah-Jeanne Royer;Sara Ferrón;Samuel T. Wilson;David M. Karl

  • Aerobic production of methane in the sea

    David M. Karl;Lucas Beversdorf;Karin M. Björkman;Matthew J. Church

  • MAGIC : a sensitive and precise method for measuring dissolved phosphorus in aquatic environments

    David M. Karl;Georgia Tien

  • A Sea of Change: Biogeochemical Variability in the North Pacific Subtropical Gyre

    David M. Karl

Frequent Co-Authors

Matthew J. Church
Matthew J. Church University of Montana
Ricardo M. Letelier
Ricardo M. Letelier Oregon State University
Edward F. DeLong
Edward F. DeLong University of Hawaii at Manoa
Roger Lukas
Roger Lukas University of Hawaii at Manoa
Jonathan P. Zehr
Jonathan P. Zehr University of California, Santa Cruz
Angelicque E. White
Angelicque E. White University of Hawaii at Manoa
Robert R. Bidigare
Robert R. Bidigare University of Hawaii at Manoa
John E. Dore
John E. Dore Montana State University
Scott C. Doney
Scott C. Doney University of Virginia
Daniel J. Repeta
Daniel J. Repeta Woods Hole Oceanographic Institution

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