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D-Index & Metrics

Discipline name D-Index World Ranking Current World Ranking National Ranking Current National Ranking Publications Citations
Earth Science 32 8708 8090 19 14 142 3752

Maciej J. Kotarba publications per year

The chart shows the history of publications by Maciej J. Kotarba between 1982 and 2022, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. Maciej J. Kotarba published across 41 years, from 1982 to 2022, averaging 3.9 papers a year. Output peaked at 17 publications in 2009. 9 of the 159 publications appeared in the last two years.

No. of publications
5 10 15
Bar chart. Horizontal axis: year, 1982 to 2022. Vertical axis: number of publications, 0 to 17. Peak 17 publications in 2009. 1982: 1 publication 1983: 0 publications 1984: 1 publication 1985: 1 publication 1986: 0 publications 1987: 1 publication 1988: 0 publications 1989: 0 publications 1990: 1 publication 1991: 0 publications 1992: 0 publications 1993: 3 publications 1994: 1 publication 1995: 2 publications 1996: 1 publication 1997: 2 publications 1998: 6 publications 1999: 1 publication 2000: 5 publications 2001: 6 publications 2002: 4 publications 2003: 6 publications 2004: 5 publications 2005: 2 publications 2006: 7 publications 2007: 5 publications 2008: 8 publications 2009: 17 publications 2010: 7 publications 2011: 8 publications 2012: 8 publications 2013: 5 publications 2014: 6 publications 2015: 2 publications 2016: 5 publications 2017: 8 publications 2018: 3 publications 2019: 4 publications 2020: 8 publications 2021: 6 publications 2022: 3 publications
1982 2022

159 publications in total across all disciplines

View publications per year as a table
Maciej J. Kotarba: publications per year, 1982 to 2022
Year Publications
1982 1
1983 0
1984 1
1985 1
1986 0
1987 1
1988 0
1989 0
1990 1
1991 0
1992 0
1993 3
1994 1
1995 2
1996 1
1997 2
1998 6
1999 1
2000 5
2001 6
2002 4
2003 6
2004 5
2005 2
2006 7
2007 5
2008 8
2009 17
2010 7
2011 8
2012 8
2013 5
2014 6
2015 2
2016 5
2017 8
2018 3
2019 4
2020 8
2021 6
2022 3
Total 159
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Maciej J. Kotarba publications per year - data summary

  • Maciej J. Kotarba, a Earth Science scholar from AGH University of Science and Technology, has 159 publications recorded across 41 years, from 1982 to 2022.
  • The oldest publication on record dates to 1982 and the most recent to 2022.
  • The most productive year is 2009, with 17 publications.
  • The least productive years with any output are 1982, 1984, 1985, 1987 and others, with 1 publication each.
  • 6 of the 41 years in the span carry no publications at all (1983, 1986, 1988, 1989 and others).
  • The rate of publication averages 3.9 papers per year over the whole span, or 4.5 per year counting only the 35 years with at least one publication.
  • The last 5 years on the chart (2018-2022) hold 24 publications, 15% of the career total.
  • Split into equal eras - 1982-1995: 11 publications (0.8 per year); 1996-2009: 75 publications (5.4 per year); 2010-2022: 73 publications (5.6 per year).
  • Comparing the opening and closing eras, the overall trend of publication is rising.

Maciej J. Kotarba 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 Maciej J. Kotarba 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, 138–147 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: 142 publications — 34th percentile

34% 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
138–147 491 142
148–157 495
158–167 458
168–177 490
178–187 414
188–197 401
198–207 333
208–217 292
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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Maciej J. Kotarba publication distribution in Earth Science in 2026 - data summary

  • The chart plots the publication count of all 9,176 Earth Science scientists ranked by Research.com in 2026, grouped into 58 ranges running from 38–47 to 603+ publications.
  • Maciej J. Kotarba, a Earth Science scholar from AGH University of Science and Technology, records 142 publications - the 34th percentile of the discipline.
  • 34% of ranked Earth Science scientists score the same or lower than Maciej J. Kotarba, and about 66% score higher.
  • The median of the discipline falls in the 168–177 publications range, and Maciej J. Kotarba ranks below the median.
  • The most crowded range is 128–137 publications, holding 557 scientists (6% of the field).
  • 58% of the field sits in the lowest quarter of the value range (up to 178–187 publications), so the distribution is heavily right-skewed and high scores are rare.
  • The final bar has no upper bound: it groups every scientist with 603 publications or more, 100 scientists in all (1% of the field).

Maciej J. Kotarba 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 Maciej J. Kotarba 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, 32 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: 32 D-Index — 7th percentile

7% 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 32
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
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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Maciej J. Kotarba D-index placement in Earth Science in 2026 - data summary

  • The chart plots the discipline H-index (D-index) of all 9,176 Earth Science scientists ranked by Research.com in 2026, grouped into 77 ranges running from 30 to 106+ D-Index.
  • Maciej J. Kotarba, a Earth Science scholar from AGH University of Science and Technology, records 32 D-Index - the 7th percentile of the discipline.
  • 7% of ranked Earth Science scientists score the same or lower than Maciej J. Kotarba, and about 93% score higher.
  • The median of the discipline falls in the 44 D-Index range, and Maciej J. Kotarba ranks below the median.
  • The most crowded range is 36 D-Index, holding 389 scientists (4% of the field).
  • 62% of the field sits in the lowest quarter of the value range (up to 49 D-Index), so the distribution is heavily right-skewed and high scores are rare.
  • The final bar has no upper bound: it groups every scientist with 106 D-Index or more, 98 scientists in all (1% of the field).

Overview

Maciej J. Kotarba is affiliated with AGH University of Science and Technology in Poland. Their research primarily spans the fields of Engineering and Earth and Planetary Sciences, with a focus on subfields such as Mechanics of Materials, Geophysics, Environmental Chemistry, Ocean Engineering, and Geochemistry and Petrology.

The scientist's work covers several main topics, including:

  • Hydrocarbon exploration and reservoir analysis
  • Geological formations and processes exploration
  • Methane hydrates and related phenomena
  • Coal properties and utilization
  • Coal and its by-products
  • Coal and coke industries research
  • Petroleum processing and analysis

Maciej J. Kotarba has a number of recent publications demonstrating their research interests. Notable papers include:

  • Fluctuations in methane and carbon dioxide concentrations in the near-surface zone and their genetic characterization in abandoned and active coal mines in the SW part of the Upper Silesian Coal Basin, Poland (2020), published in International Journal of Coal Geology
  • Origin of hydrocarbon and non-hydrocarbon (H2S, CO2 and N2) components of natural gas accumulated in the Zechstein Main Dolomite carbonate reservoir of the western part of the Polish sector of the Southern Permian Basin (2020), published in Chemical Geology
  • Simulated maturation by hydrous pyrolysis of bituminous coals and carbonaceous shales from the Upper Silesian and Lublin basins (Poland): Induced compositional variations in biomarkers, carbon isotopes and macerals (2021), published in International Journal of Coal Geology
  • Origin, secondary processes and migration of oil and natural gas in the central part of the Polish Outer Carpathians (2020), published in Marine and Petroleum Geology
  • Variations of bitumen fraction, biomarker, stable carbon isotope and maceral compositions of dispersed organic matter in the Miocene strata (Carpathian Foredeep, Poland) during maturation simulated by hydrous pyrolysis (2021), published in Marine and Petroleum Geology

The scientist frequently collaborates with other researchers. Frequent co-authors include:

  • Dariusz Więcław
  • Krzysztof Jurek
  • Elżbieta Bilkiewicz
  • Marta Waliczek
  • Mirosław Słowakiewicz

Maciej J. Kotarba publishes regularly in several academic venues. The most common journals for their work are:

  • International Journal of Coal Geology
  • Chemical Geology
  • Marine and Petroleum Geology
  • International Journal of Earth Sciences
  • AAPG Bulletin

Best Publications

  • Composition and origin of coalbed gases in the Upper Silesian and Lublin basins, Poland

    Maciej J Kotarba

  • Oil-generation kinetics for organic facies with Type-II and -IIS kerogen in the Menilite Shales of the Polish Carpathians

    M.D. Lewan;M.J. Kotarba;John B. Curtis;D. Wieclaw

  • Characterizing thermogenic coalbed gas from Polish coals of different ranks by hydrous pyrolysis

    Maciej J. Kotarba;Michael D. Lewan

  • Assessment of hydrocarbon source rock potential of Polish bituminous coals and carbonaceous shales

    Maciej J. Kotarba;Jerry L. Clayton;Dudley D. Rice;Marian Wagner

  • Composition and origin of coalbed gases in the Lower Silesian basin, southwest Poland

    Maciej J. Kotarba;Dudley D. Rice

  • Diagenetic history of the Podhale-Orava Basin and the underlying Tatra sedimentary structural units (Western Carpathians) : evidence from XRD and K-Ar of illite-smectite

    J. Środoń;M. Kotarba;A. Biroň;P. Such

  • Biomarker geochemistry of a foreland basin: the Oligocene Menilite Formation in the Flysch Carpathians of Southeast Poland

    J. Köster;M. Rospondek;S. Schouten;M. Kotarba

  • Oil/oil and oil/source rock correlations in the Carpathian Foredeep and Overthrust, south-east Poland☆

    H.L. ten Haven;E. Lafargue;M. Kotarba

  • Composition and origin of natural gases accumulated in the Polish and Ukrainian parts of the Carpathian region : Gaseous hydrocarbons, noble gases, carbon dioxide and nitrogen

    Maciej J. Kotarba;Keisuke Nagao

  • A stable carbon isotope and biological marker study of Polish bituminous coals and carbonaceous shales

    Maciej J. Kotarba;Jerry L. Clayton

  • The Origin and Habitat of Hydrocarbons of the Polish and Ukrainian Parts of the Carpathian Province

    M. J. Kotarba;Y. V. Koltun

  • Geology, spatial distribution of methane content and origin of coalbed gases in Upper Carboniferous (Upper Mississippian and Pennsylvanian) strata in the south-eastern part of the Upper Silesian Coal Basin, Poland

    Sławomir Kędzior;Maciej J. Kotarba;Zbigniew Pękała

  • Pre‐Neogene evolution of the Western Carpathians: Constraints from the Bochnia‐Tatra Mountains section (Polish Western Carpathians)

    E. Roca;G. Bessereau;E. Jawor;M. Kotarba

  • Oil/source rock correlations in the Polish Flysch Carpathians and Mesozoic basement and organic facies of the Oligocene Menilite Shales: insights from hydrous pyrolysis experiments

    John B. Curtis;Maciej J. Kotarba;Michael D. Lewan;Dariusz Więcław

  • Organic geochemical study and genetic correlation of natural gas, oil and Menilite source rocks in the area between San and Stryi rivers (Polish and Ukrainian Carpathians)

    M.J. Kotarba;D. Więcław;Y.V. Koltun;L. Marynowski

  • Comparison of natural gases accumulated in Oligocene strata with hydrous pyrolysis gases from Menilite Shales of the Polish Outer Carpathians

    M.J. Kotarba;John B. Curtis;M.D. Lewan

  • Source rock habitat and hydrocarbon potential of Oligocene Menilite Formation (Flysch Carpathians, Southeast Poland): an organic geochemical and isotope approach

    J. Köster;M. Kotarba;E. Lafargue;P. Kosakowski

  • Sources of natural gases in Middle Cambrian reservoirs in Polish and Lithuanian Baltic Basin as determined by stable isotopes and hydrous pyrolysis of Lower Palaeozoic source rocks

    M.J. Kotarba;M.D. Lewan

  • Origin of natural waters and gases within the Upper Carboniferous coal-bearing and autochthonous Miocene strata in South-Western part of the Upper Silesian Coal Basin, Poland

    Maciej J. Kotarba;Irena Pluta

  • Evaluating transition-metal catalysis in gas generation from the Permian Kupferschiefer by hydrous pyrolysis

    M.D. Lewan;M.J. Kotarba;D. Więcław;A. Piestrzyński

  • Habitat and hydrocarbon potential of the lower Paleozoic source rocks in the Polish part of the Baltic region

    Dariusz Więcław;Maciej J. Kotarba;Paweł Kosakowski;Adam Kowalski

Frequent Co-Authors

Michael D. Lewan
Michael D. Lewan United States Geological Survey
Keisuke Nagao
Keisuke Nagao University of Tokyo
Tadeusz Marek Peryt
Tadeusz Marek Peryt Polish Geological Institute
Achim Bechtel
Achim Bechtel University of Leoben
Leszek Marynowski
Leszek Marynowski University of Silesia
Richard D. Pancost
Richard D. Pancost University of Bristol
J.S. Sinninghe Damsté
J.S. Sinninghe Damsté Utrecht University
Reinhard F. Sachsenhofer
Reinhard F. Sachsenhofer University of Leoben
Kazimierz Rozanski
Kazimierz Rozanski AGH University of Science and Technology
Carsten J. Schubert
Carsten J. Schubert Swiss Federal Institute of Aquatic Science and Technology

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