| Discipline name | D-Index | World Ranking | Current World Ranking | National Ranking | Current National Ranking | Publications | Citations |
|---|---|---|---|---|---|---|---|
| Earth Science | 52 | 3005 | 2744 | 1225 | 1087 | 125 | 11281 |
The chart shows the history of publications by Michael D. Lewan between 1977 and 2025, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. Michael D. Lewan published across 49 years, from 1977 to 2025, averaging 2.7 papers a year. Output peaked at 9 publications in 2014. 3 of the 130 publications appeared in the last two years.
130 publications in total across all disciplines
| Year | Publications |
|---|---|
| 1977 | 1 |
| 1978 | 1 |
| 1979 | 1 |
| 1980 | 0 |
| 1981 | 0 |
| 1982 | 1 |
| 1983 | 1 |
| 1984 | 1 |
| 1985 | 1 |
| 1986 | 2 |
| 1987 | 1 |
| 1988 | 0 |
| 1989 | 1 |
| 1990 | 1 |
| 1991 | 1 |
| 1992 | 2 |
| 1993 | 3 |
| 1994 | 6 |
| 1995 | 3 |
| 1996 | 3 |
| 1997 | 3 |
| 1998 | 5 |
| 1999 | 4 |
| 2000 | 1 |
| 2001 | 2 |
| 2002 | 5 |
| 2003 | 7 |
| 2004 | 4 |
| 2005 | 3 |
| 2006 | 4 |
| 2007 | 2 |
| 2008 | 7 |
| 2009 | 3 |
| 2010 | 4 |
| 2011 | 3 |
| 2012 | 2 |
| 2013 | 8 |
| 2014 | 9 |
| 2015 | 5 |
| 2016 | 2 |
| 2017 | 5 |
| 2018 | 4 |
| 2019 | 1 |
| 2020 | 3 |
| 2021 | 0 |
| 2022 | 0 |
| 2023 | 1 |
| 2024 | 1 |
| 2025 | 2 |
| Total | 130 |
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 Michael D. Lewan sits on this spectrum.
This scientist: 125 publications — 25th percentile
25% of scientists in this discipline score the same or lower.
The last bar groups every scientist with 603 publications or more.
| 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 | 125 |
| 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 | |
| 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 |
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 Michael D. Lewan sits on this spectrum.
This scientist: 52 D-Index — 68th percentile
68% of scientists in this discipline score the same or lower.
The last bar groups every scientist with 106 D-Index or more.
| 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 | 52 |
| 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 |
Michael D. Lewan is affiliated with the United States Geological Survey in the United States. Their research spans multiple areas within engineering, environmental science, and agricultural and biological sciences, with a focus on hydrocarbon exploration and reservoir analysis, petroleum processing and analysis, and atmospheric and environmental gas dynamics.
The scientist has contributed notably to fields such as mechanics of materials, analytical chemistry, global and planetary change, environmental chemistry, and ocean engineering. Their research topics include methane hydrates and related phenomena, coal properties and utilization, biological control of invasive species, and botany, ecology, and taxonomy studies.
Lewan's recent publications reflect a broad engagement with geosciences and organic geochemistry. Notable papers include:
Their frequent coauthors include Katherine L. French, Justin E. Birdwell, Hao Xie, Camilo Ponton, and Michael J. Formolo, indicating collaborations across various sub-disciplines within Earth sciences and geochemistry.
Lewan has published primarily in the journals Organic Geochemistry, Marine and Petroleum Geology, Geochimica et Cosmochimica Acta, and AAPG Bulletin. These venues align with their research interests in organic geochemical processes, isotopic analysis, and reservoir characterization.
M.D. Lewan
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M. D. Lewan;J. C. Winters;J. H. Mcdonald
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Michael D. Lewan
Arndt Schimmelmann;Michael D. Lewan;Robert P. Wintsch
M.D Lewan
M.D. Lewan;T.E. Ruble
D.A. Stolper;M. Lawson;C.L. Davis;A.A. Ferreira
Grzegorz P. Lis;Maria Mastalerz;Arndt Schimmelmann;Michael D. Lewan
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Michael D. Lewan;Stéphanie Roy
Edward D. Pittman;Michael D. Lewan
Françoise Behar;François Lorant;Michael Lewan;Michael Lewan
M.D Lewan;M Bjorøy;D.L Dolcater
Haiyan Hu;Haiyan Hu;Tongwei Zhang;Tongwei Zhang;Jaclyn D. Wiggins-Camacho;Geoffrey S. Ellis
Janet K. Pitman;Douglas Steinshouer;Michael D. Lewan
Martin P Koopmans;W.Irene C Rijpstra;Mariëtte M Klapwijk;Jan W de Leeuw
Tim E. Ruble;M. D. Lewan;R. P. Philp
F Behar;M.D Lewan;F Lorant;M Vandenbroucke
Arndt Schimmelmann;Jean-Paul Boudou;Michael D. Lewan;Robert P. Wintsch
Martin P. Koopmans;Jan W. De Leeuw;Michael D. Lewan;Jaap S. Sinninghe Damste
André L. D. Spigolon;André L. D. Spigolon;Michael D. Lewan;Henrique Luiz de Barros Penteado;Luiz Felipe C. Coutinho
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For those interested in expanding their expertise beyond Earth Science, pursuing additional online degrees can open up diverse career pathways. For example, an online mfa degree offers creative professionals a flexible way to develop skills in fields like environmental communication or science fiction writing.
Similarly, students looking to combine scientific knowledge with people management may consider an online masters degree in human resource management. This can be invaluable for leadership roles in organizations focused on sustainability and environmental projects.
For older learners or those seeking career changes later in life, exploring the best online degree programs for seniors ensures accessible, flexible study options tailored to meet their unique needs and goals.
Additionally, an online mlis programs accredited ala provide a pathway for those interested in managing scientific information and archives, fostering critical skills in digital curation and knowledge management.
Exploring these related degree options can greatly enhance career opportunities and provide valuable interdisciplinary skills in Earth Science and beyond.
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