World's Best Scientists 2026 revealed!
Karen L. Casciotti

Karen L. Casciotti

D-Index & Metrics

Discipline name D-Index World Ranking Current World Ranking National Ranking Current National Ranking Publications Citations
Environmental Sciences 57 3391 3241 1304 1207 143 15333

Karen L. Casciotti publications per year

The chart shows the history of publications by Karen L. Casciotti between 1998 and 2025, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. Karen L. Casciotti published across 28 years, from 1998 to 2025, averaging 6.1 papers a year. Output peaked at 18 publications in 2023. 12 of the 172 publications appeared in the last two years.

No. of publications
5 10 15
Bar chart. Horizontal axis: year, 1998 to 2025. Vertical axis: number of publications, 0 to 18. Peak 18 publications in 2023. 1998: 1 publication 1999: 0 publications 2000: 0 publications 2001: 3 publications 2002: 2 publications 2003: 1 publication 2004: 2 publications 2005: 2 publications 2006: 3 publications 2007: 8 publications 2008: 6 publications 2009: 3 publications 2010: 10 publications 2011: 5 publications 2012: 6 publications 2013: 7 publications 2014: 7 publications 2015: 8 publications 2016: 12 publications 2017: 9 publications 2018: 10 publications 2019: 9 publications 2020: 5 publications 2021: 9 publications 2022: 14 publications 2023: 18 publications 2024: 8 publications 2025: 4 publications
1998 2025

172 publications in total across all disciplines

View publications per year as a table
Karen L. Casciotti: publications per year, 1998 to 2025
Year Publications
1998 1
1999 0
2000 0
2001 3
2002 2
2003 1
2004 2
2005 2
2006 3
2007 8
2008 6
2009 3
2010 10
2011 5
2012 6
2013 7
2014 7
2015 8
2016 12
2017 9
2018 10
2019 9
2020 5
2021 9
2022 14
2023 18
2024 8
2025 4
Total 172
Download as CSV

Karen L. Casciotti 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 Karen L. Casciotti 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, 141–150 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: 143 publications — 38th percentile

38% 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
141–150 541 143
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
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
Download as CSV

Karen L. Casciotti 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 Karen L. Casciotti 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, 57 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: 57 D-Index — 65th percentile

65% 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 57
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
Download as CSV

Overview

Karen L. Casciotti is affiliated with Stanford University in the United States. Their research primarily spans Earth and Planetary Sciences and Environmental Science, with a focus on oceanographic and ecological processes.

The scientist has contributed significantly to studies in various subfields including Oceanography, Ecology, Environmental Chemistry, Geochemistry and Petrology, and Industrial and Manufacturing Engineering. Their work addresses key topics such as Marine and Coastal Ecosystems, Microbial Community Ecology and Physiology, Isotope Analysis in Ecology, Marine Biology and Ecology Research, Methane Hydrates and Related Phenomena, Groundwater and Isotope Geochemistry, and Water Quality Monitoring and Analysis.

Among their recent publications are the following papers:

  • Nitrification and Nitrous Oxide Production in the Offshore Waters of the Eastern Tropical South Pacific, 2020, Global Biogeochemical Cycles
  • Microbial N2O consumption in and above marine N2O production hotspots, 2020, The ISME Journal
  • Quantifying Nitrous Oxide Cycling Regimes in the Eastern Tropical North Pacific Ocean With Isotopomer Analysis, 2020, Global Biogeochemical Cycles
  • An intermediate-depth source of hydrothermal 3He and dissolved iron in the North Pacific, 2020, Earth and Planetary Science Letters
  • Kinetics of nitrous oxide production from ammonia oxidation in the Eastern Tropical North Pacific, 2022, Limnology and Oceanography

The frequent coauthors collaborating with Karen L. Casciotti include:

  • Colette L. Kelly
  • Bess B. Ward
  • Nicole M. Travis
  • Xue-Ji Gu
  • Yu Xin

Publications have appeared repeatedly in venues such as Global Biogeochemical Cycles, Zenodo (CERN European Organization for Nuclear Research), Biogeosciences, The ISME Journal, and Limnology and Oceanography.

Best Publications

  • A Bacterial Method for the Nitrogen Isotopic Analysis of Nitrate in Seawater and Freshwater

    D.M. Sigman;K.L. Casciotti;M. Andreani;C. Barford

  • Measurement of the Oxygen Isotopic Composition of Nitrate in Seawater and Freshwater Using the Denitrifier Method

    K L Casciotti;D M Sigman;M Galanter Hastings;J K Böhlke

  • Revisiting Carbon Flux Through the Ocean's Twilight Zone

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

  • Isotopic Signature of N2O Produced by Marine Ammonia-Oxidizing Archaea

    Alyson E. Santoro;Carolyn Buchwald;Matthew R. McIlvin;Karen L. Casciotti

  • Activity, abundance and diversity of nitrifying archaea and bacteria in the central California Current

    Alyson E. Santoro;Alyson E. Santoro;Karen L. Casciotti;Christopher A. Francis

  • Ocean process tracers: nitrogen isotopes in the ocean

    DM Sigman;KL Karsh;KL Casciotti

  • Linking Diversity and Stable Isotope Fractionation in Ammonia-Oxidizing Bacteria

    Karen L. Casciotti;Daniel Mikhail Sigman;Bettie Ward

  • Nitrogen Isotopes in the Ocean

    Daniel Mikhail Sigman;K. L. Karsh;K. L. Casciotti

  • The GEOTRACES Intermediate Data Product 2017

    Reiner Schlitzer;Robert F. Anderson;Elena Masferrer Dodas;Maeve Lohan

  • Inverse kinetic isotope fractionation during bacterial nitrite oxidation.

    Karen L. Casciotti

  • Technical updates to the bacterial method for nitrate isotopic analyses.

    Matthew R. McIlvin;Karen L. Casciotti

  • Biogeochemical controls and isotopic signatures of nitrous oxide production by a marine ammonia-oxidizing bacterium

    C. H. Frame;K. L. Casciotti

  • Oxygen isotopes in nitrite: analysis, calibration, and equilibration.

    Karen L. Casciotti;John Karl Böhlke;Matthew R. McIlvin;and Stanley J. Mroczkowski

  • Oxygen isotopic fractionation and exchange during bacterial nitrite oxidation

    Carolyn Buchwald;Karen L. Casciotti

  • Enrichment and characterization of ammonia-oxidizing archaea from the open ocean: phylogeny, physiology and stable isotope fractionation

    Alyson E Santoro;Karen L Casciotti;Karen L Casciotti

  • Dissimilatory Nitrite Reductase Genes from Autotrophic Ammonia-Oxidizing Bacteria

    Karen L. Casciotti;Bess B. Ward

  • Oxygen isotopic exchange and fractionation during bacterial ammonia oxidation

    Karen L. Casciotti;Matthew McIlvin;Carolyn Buchwald

  • Abiotic nitrous oxide emission from the hypersaline Don Juan Pond in Antarctica

    Vladimir A. Samarkin;Michael T. Madigan;Marshall W. Bowles;Karen L. Casciotti

  • Isotopic analyses of nitrate and nitrite from reference mixtures and application to Eastern Tropical North Pacific waters

    K.L. Casciotti;M.R. McIlvin

  • Nitrogen and Oxygen Isotopic Studies of the Marine Nitrogen Cycle

    Karen L Casciotti

  • Sampling and Sample-handling Protocols for GEOTRACES Cruises. Version 3, August 2017.

    Gregory Cutter;Karen Casciotti;Peter Croot;Walter Geibert

Frequent Co-Authors

Bess B. Ward
Bess B. Ward Princeton University
Daniel M. Sigman
Daniel M. Sigman Princeton University
Phoebe J. Lam
Phoebe J. Lam University of California, Santa Cruz
Christopher A. Francis
Christopher A. Francis Stanford University
Calvin W. Mordy
Calvin W. Mordy Pacific Marine Environmental Laboratory
Ken O. Buesseler
Ken O. Buesseler Woods Hole Oceanographic Institution
Gregory A. Cutter
Gregory A. Cutter Old Dominion University
Carl H. Lamborg
Carl H. Lamborg University of California, Santa Cruz
Jessica N. Fitzsimmons
Jessica N. Fitzsimmons Texas A&M University
Tyler B. Coplen
Tyler B. Coplen United States Geological Survey

If you think any of the details on this page are incorrect, let us know.

Report an issue

We appreciate your kind effort to assist us to improve this page, it would be helpful providing us with as much detail as possible in the text box below:

Related Online Degrees & Career Pathways

Pursuing a degree in Environmental Sciences opens various pathways, many of which can be enhanced through further online education. For those interested in education leadership, exploring eds to edd programs can provide advanced expertise and career growth opportunities.

Social work intersects with environmental justice in numerous ways, making an online doctorate like the dsw program a valuable option for professionals aiming to address community and environmental challenges from a social work perspective.

For students seeking flexibility and affordability, the best affordable online general studies degree programs offer a broad foundation that can complement specific environmental science interests or lead to interdisciplinary careers.

Additionally, those new to higher education might consider some of the easiest bachelor degree programs available online as a stepping stone toward more specialized environmental studies or related fields.

Best Scientists Citing Karen L. Casciotti

Trending Scientists

Recently Published Articles