World's Best Scientists 2026 revealed!

D-Index & Metrics

Discipline name D-Index World Ranking Current World Ranking National Ranking Current National Ranking Publications Citations
Earth Science 82 454 389 241 199 212 27985

Alan J. Kaufman publications per year

The chart shows the history of publications by Alan J. Kaufman between 1985 and 2025, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. Alan J. Kaufman published across 41 years, from 1985 to 2025, averaging 7.1 papers a year. Output peaked at 34 publications in 2024. 43 of the 292 publications appeared in the last two years.

No. of publications
10 20 30
Bar chart. Horizontal axis: year, 1985 to 2025. Vertical axis: number of publications, 0 to 34. Peak 34 publications in 2024. 1985: 1 publication 1986: 3 publications 1987: 0 publications 1988: 0 publications 1989: 0 publications 1990: 2 publications 1991: 1 publication 1992: 2 publications 1993: 1 publication 1994: 3 publications 1995: 6 publications 1996: 6 publications 1997: 3 publications 1998: 3 publications 1999: 7 publications 2000: 1 publication 2001: 4 publications 2002: 6 publications 2003: 6 publications 2004: 4 publications 2005: 9 publications 2006: 12 publications 2007: 12 publications 2008: 11 publications 2009: 8 publications 2010: 8 publications 2011: 11 publications 2012: 8 publications 2013: 5 publications 2014: 14 publications 2015: 5 publications 2016: 10 publications 2017: 5 publications 2018: 9 publications 2019: 10 publications 2020: 7 publications 2021: 11 publications 2022: 23 publications 2023: 12 publications 2024: 34 publications 2025: 9 publications
1985 2025

292 publications in total across all disciplines

View publications per year as a table
Alan J. Kaufman: publications per year, 1985 to 2025
Year Publications
1985 1
1986 3
1987 0
1988 0
1989 0
1990 2
1991 1
1992 2
1993 1
1994 3
1995 6
1996 6
1997 3
1998 3
1999 7
2000 1
2001 4
2002 6
2003 6
2004 4
2005 9
2006 12
2007 12
2008 11
2009 8
2010 8
2011 11
2012 8
2013 5
2014 14
2015 5
2016 10
2017 5
2018 9
2019 10
2020 7
2021 11
2022 23
2023 12
2024 34
2025 9
Total 292
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Alan J. Kaufman publication distribution in Earth Science in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Earth Science in 2026. The highlighted bar marks where Alan J. Kaufman sits on this spectrum.

No. of scientists
100 200 300 400 500
Bar chart with 58 bars. Horizontal axis: publications, 38–47 to 603+. Vertical axis: number of scientists, 0 to 557. Most scientists, 557, have 128–137 publications. The last bar groups every scientist with 603 publications or more. The highlighted bar, 208–217 publications, is where this scientist sits. 38–47 publications: 5 scientists 48–57 publications: 33 scientists 58–67 publications: 94 scientists 68–77 publications: 161 scientists 78–87 publications: 278 scientists 88–97 publications: 376 scientists 98–107 publications: 404 scientists 108–117 publications: 484 scientists 118–127 publications: 540 scientists 128–137 publications: 557 scientists 138–147 publications: 491 scientists 148–157 publications: 495 scientists 158–167 publications: 458 scientists 168–177 publications: 490 scientists 178–187 publications: 414 scientists 188–197 publications: 401 scientists 198–207 publications: 333 scientists 208–217 publications: 292 scientists 218–227 publications: 290 scientists 228–237 publications: 262 scientists 238–247 publications: 243 scientists 248–257 publications: 208 scientists 258–267 publications: 185 scientists 268–277 publications: 147 scientists 278–287 publications: 128 scientists 288–297 publications: 119 scientists 298–307 publications: 120 scientists 308–317 publications: 107 scientists 318–327 publications: 93 scientists 328–337 publications: 87 scientists 338–347 publications: 64 scientists 348–357 publications: 87 scientists 358–367 publications: 60 scientists 368–377 publications: 60 scientists 378–387 publications: 34 scientists 388–397 publications: 50 scientists 398–407 publications: 44 scientists 408–417 publications: 31 scientists 418–427 publications: 39 scientists 428–437 publications: 27 scientists 438–447 publications: 36 scientists 448–457 publications: 27 scientists 458–467 publications: 29 scientists 468–477 publications: 30 scientists 478–487 publications: 19 scientists 488–497 publications: 15 scientists 498–507 publications: 18 scientists 508–517 publications: 19 scientists 518–527 publications: 16 scientists 528–537 publications: 10 scientists 538–547 publications: 11 scientists 548–557 publications: 14 scientists 558–567 publications: 11 scientists 568–577 publications: 7 scientists 578–587 publications: 14 scientists 588–597 publications: 5 scientists 598–602 publications: 4 scientists 603+ publications: 100 scientists
38–47 publications 603+

This scientist: 212 publications — 67th percentile

67% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 603 publications or more.

View publications distribution as a table
Number of Earth Science scientists by publication count, Research.com 2026 ranking edition. Based on 9,176 ranked scientists.
Publications Scientists This scientist
38–47 5
48–57 33
58–67 94
68–77 161
78–87 278
88–97 376
98–107 404
108–117 484
118–127 540
128–137 557
138–147 491
148–157 495
158–167 458
168–177 490
178–187 414
188–197 401
198–207 333
208–217 292 212
218–227 290
228–237 262
238–247 243
248–257 208
258–267 185
268–277 147
278–287 128
288–297 119
298–307 120
308–317 107
318–327 93
328–337 87
338–347 64
348–357 87
358–367 60
368–377 60
378–387 34
388–397 50
398–407 44
408–417 31
418–427 39
428–437 27
438–447 36
448–457 27
458–467 29
468–477 30
478–487 19
488–497 15
498–507 18
508–517 19
518–527 16
528–537 10
538–547 11
548–557 14
558–567 11
568–577 7
578–587 14
588–597 5
598–602 4
603+ 100
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Alan J. Kaufman D-index placement in Earth Science in 2026

The chart shows the D-index (discipline H-index) distribution of Earth Science scientists ranked by Research.com in 2026. The highlighted bar marks where Alan J. Kaufman sits on this spectrum.

No. of scientists
100 200 300
Bar chart with 77 bars. Horizontal axis: D-Index, 30 to 106+. Vertical axis: number of scientists, 0 to 389. Most scientists, 389, have 36 D-Index. The last bar groups every scientist with 106 D-Index or more. The highlighted bar, 82 D-Index, is where this scientist sits. 30 D-Index: 144 scientists 31 D-Index: 215 scientists 32 D-Index: 278 scientists 33 D-Index: 379 scientists 34 D-Index: 366 scientists 35 D-Index: 372 scientists 36 D-Index: 389 scientists 37 D-Index: 366 scientists 38 D-Index: 344 scientists 39 D-Index: 349 scientists 40 D-Index: 296 scientists 41 D-Index: 289 scientists 42 D-Index: 277 scientists 43 D-Index: 279 scientists 44 D-Index: 248 scientists 45 D-Index: 257 scientists 46 D-Index: 212 scientists 47 D-Index: 202 scientists 48 D-Index: 207 scientists 49 D-Index: 204 scientists 50 D-Index: 183 scientists 51 D-Index: 178 scientists 52 D-Index: 182 scientists 53 D-Index: 178 scientists 54 D-Index: 163 scientists 55 D-Index: 117 scientists 56 D-Index: 163 scientists 57 D-Index: 120 scientists 58 D-Index: 113 scientists 59 D-Index: 136 scientists 60 D-Index: 135 scientists 61 D-Index: 96 scientists 62 D-Index: 103 scientists 63 D-Index: 83 scientists 64 D-Index: 103 scientists 65 D-Index: 83 scientists 66 D-Index: 89 scientists 67 D-Index: 92 scientists 68 D-Index: 89 scientists 69 D-Index: 78 scientists 70 D-Index: 75 scientists 71 D-Index: 53 scientists 72 D-Index: 62 scientists 73 D-Index: 54 scientists 74 D-Index: 35 scientists 75 D-Index: 52 scientists 76 D-Index: 50 scientists 77 D-Index: 32 scientists 78 D-Index: 37 scientists 79 D-Index: 20 scientists 80 D-Index: 33 scientists 81 D-Index: 36 scientists 82 D-Index: 34 scientists 83 D-Index: 34 scientists 84 D-Index: 24 scientists 85 D-Index: 19 scientists 86 D-Index: 18 scientists 87 D-Index: 26 scientists 88 D-Index: 30 scientists 89 D-Index: 17 scientists 90 D-Index: 21 scientists 91 D-Index: 19 scientists 92 D-Index: 15 scientists 93 D-Index: 14 scientists 94 D-Index: 20 scientists 95 D-Index: 9 scientists 96 D-Index: 10 scientists 97 D-Index: 15 scientists 98 D-Index: 13 scientists 99 D-Index: 3 scientists 100 D-Index: 13 scientists 101 D-Index: 3 scientists 102 D-Index: 9 scientists 103 D-Index: 4 scientists 104 D-Index: 6 scientists 105 D-Index: 6 scientists 106+ D-Index: 98 scientists
30 D-Index 106+

This scientist: 82 D-Index — 95th percentile

95% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 106 D-Index or more.

View D-Index distribution as a table
Number of Earth Science scientists by D-index, Research.com 2026 ranking edition. Based on 9,176 ranked scientists.
D-Index Scientists This scientist
30 144
31 215
32 278
33 379
34 366
35 372
36 389
37 366
38 344
39 349
40 296
41 289
42 277
43 279
44 248
45 257
46 212
47 202
48 207
49 204
50 183
51 178
52 182
53 178
54 163
55 117
56 163
57 120
58 113
59 136
60 135
61 96
62 103
63 83
64 103
65 83
66 89
67 92
68 89
69 78
70 75
71 53
72 62
73 54
74 35
75 52
76 50
77 32
78 37
79 20
80 33
81 36
82 34 82
83 34
84 24
85 19
86 18
87 26
88 30
89 17
90 21
91 19
92 15
93 14
94 20
95 9
96 10
97 15
98 13
99 3
100 13
101 3
102 9
103 4
104 6
105 6
106+ 98
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Research.com Recognitions

  • Fellow of the Geological Society of America
  • Fellow of the Geological Society of America
  • Fellow of the Geological Society of America
  • Fellow of the Geological Society of America

Overview

Alan J. Kaufman is affiliated with the University of Maryland, College Park in the United States. Their main field of research is Earth and Planetary Sciences, with significant contributions across several specialized subfields, including Atmospheric Science, Paleontology, Environmental Chemistry, Geochemistry and Petrology, and Mechanics of Materials.

Their research spans a variety of interconnected topics, reflecting a broad interest in geology, paleoclimatology, and atmospheric processes. Key topics in their work include Paleontology and Stratigraphy of Fossils, Geology and Paleoclimatology Research, Methane Hydrates and Related Phenomena, Geochemistry and Elemental Analysis, Hydrocarbon Exploration and Reservoir Analysis, Geological and Geochemical Analysis, and Atmospheric and Environmental Gas Dynamics.

Alan J. Kaufman has been involved in numerous publications, including papers in high-impact venues. Some of their recent research publications include:

  • "Deposition or diagenesis? Probing the Ediacaran Shuram excursion in South China by SIMS" (2021) in Global and Planetary Change
  • "A diverse Ediacara assemblage survived under low-oxygen conditions" (2022) in Nature Communications
  • "Tracing sources of atmospheric methane using clumped isotopes" (2023) in Proceedings of the National Academy of Sciences
  • "Primary or secondary? A dichotomy of the strontium isotope anomalies in the Ediacaran carbonates of Saudi Arabia" (2020) in Precambrian Research
  • "Basin-scale reconstruction of euxinia and Late Devonian mass extinctions" (2023) in Nature

Their frequent coauthors highlight collaborations with several researchers, including Geoffrey J. Gilleaudeau, Shuhai Xiao, Dmitriy Grazhdankin, Huan Cui, and Andrew Doerrler. The breadth of these partnerships reflects interdisciplinary connections within the Earth sciences.

The scientist has published extensively in various venues. The most frequent publication outlets include Abstracts with Programs - Geological Society of America, Proceedings of the National Academy of Sciences, Precambrian Research, Goldschmidt2021 Abstracts, and Nature.

Alan J. Kaufman has received recognition such as being named a Fellow of the Geological Society of America, which underlines their professional status within the geoscience community.

Best Publications

  • A Neoproterozoic Snowball Earth

    Paul F. Hoffman;Alan J. Kaufman;Galen P. Halverson;Daniel P. Schrag

  • Neoproterozoic variations in the C-isotopic composition of seawater: stratigraphic and biogeochemical implications.

    Alan J. Kaufman;Andrew H. Knoll

  • A Whiff of Oxygen Before the Great Oxidation Event

    Ariel D. Anbar;Yun Duan;Timothy W. Lyons;Gail L. Arnold

  • THE ABUNDANCE OF 13C IN MARINE ORGANIC MATTER AND ISOTOPIC FRACTIONATION IN THE GLOBAL BIOGEOCHEMICAL CYCLE OF CARBON DURING THE PAST 800 MA

    John M. Hayes;Harald Strauss;Alan J. Kaufman

  • The Sr, C and O isotopic evolution of Neoproterozoic seawater

    Stein B. Jacobsen;Alan J. Kaufman

  • Biostratigraphic and Geochronologic Constraints on Early Animal Evolution

    John P. Grotzinger;Samuel A. Bowring;Beverly Z. Saylor;Alan J. Kaufman

  • Sedimentary cycling and environmental change in the Late Proterozoic: Evidence from stable and radiogenic isotopes

    Louis A Derry;Alan J Kaufman;Stein B Jacobsen

  • Secular variation in carbon isotope ratios from Upper Proterozoic successions of Svalbard and East Greenland.

    A. H. Knoll;J. M. Hayes;A. J. Kaufman;K. Swett

  • The Vendian record of Sr and C isotopic variations in seawater: Implications for tectonics and paleoclimate

    Alan J. Kaufman;Stein B. Jacobsen;Andrew H. Knoll

  • Pulsed oxidation and biological evolution in the Ediacaran Doushantuo Formation

    Kathleen A. McFadden;Jing Huang;Xuelei Chu;Ganqing Jiang

  • Isotopes, Ice Ages, and Terminal Proterozoic Earth History

    Alan J. Kaufman;Andrew H. Knoll;Guy M. Narbonne

  • Experimental measurement of boron isotope fractionation in seawater

    Kateryna Klochko;Alan J. Kaufman;Wengsheng Yao;Robert H. Byrne

  • Carbon Isotope Variability across the Ediacaran Yangtze Platform in South China: Implications for a Large Surface-to-Deep Ocean δ13C Gradient

    Ganqing Jiang;Alan J. Kaufman;Nicholas Christie-Blick;Shihong Zhang

  • Late Archean Biospheric Oxygenation and Atmospheric Evolution

    Alan J. Kaufman;David T. Johnston;James Farquhar;Andrew L. Masterson

  • Isotopic compositions of carbonates and organic carbon from upper Proterozoic successions in Namibia: stratigraphic variation and the effects of diagenesis and metamorphism.

    Alan J Kaufman;J.M Hayes;Andrew H Knoll;Gerard J.B Germs

  • The sulfur isotopic composition of Neoproterozoic seawater sulfate: implications for a snowball Earth?

    Matthew T. Hurtgen;Michael A. Arthur;Neil S. Suits;Alan J. Kaufman

  • Isotopic evidence for Mesoarchaean anoxia and changing atmospheric sulphur chemistry

    James Farquhar;Marc Peters;David T. Johnston;Harald Strauss

  • Reconstructing Earth's surface oxidation across the Archean-Proterozoic transition

    Qingjun Guo;Qingjun Guo;Harald Strauss;Alan J. Kaufman;Alan J. Kaufman;Stefan Schröder

  • Integrated Chemostratigraphy and Biostratigraphy of the Windermere Supergroup, Northwestern Canada: Implications for Neoproterozoic Correlations and the Early Evolution of Animals

    Guy M. Narbonne;Alan J. Kaufman;Andrew H. Knoll

  • Pervasive oxygenation along late Archaean ocean margins

    Brian Kendall;Christopher T. Reinhard;Timothy W. Lyons;Alan J. Kaufman

  • A composite reference section for terminal proterozoic strata of southern Namibia.

    Beverly Z. Saylor;Alan J. Kaufman;John P. Grotzinger;Frank Urban

Frequent Co-Authors

Shuhai Xiao
Shuhai Xiao Virginia Tech
Andrew H. Knoll
Andrew H. Knoll Harvard University
James Farquhar
James Farquhar University of Maryland, College Park
Frank A. Corsetti
Frank A. Corsetti University of Southern California
Ariel D. Anbar
Ariel D. Anbar Arizona State University
Huiming Bao
Huiming Bao Louisiana State University
Chuanming Zhou
Chuanming Zhou Chinese Academy of Sciences
Karem Azmy
Karem Azmy Memorial University of Newfoundland
Ganqing Jiang
Ganqing Jiang University of Nevada, Las Vegas
Yongbo Peng
Yongbo Peng Tongji University

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