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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 52 2966 2709 1211 1074 163 16462

Raymond G. Najjar publications per year

The chart shows the history of publications by Raymond G. Najjar between 1986 and 2026, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. Raymond G. Najjar published across 41 years, from 1986 to 2026, averaging 4.9 papers a year. Output peaked at 18 publications in 2018. 10 of the 200 publications appeared in the last two years.

No. of publications
5 10 15
Bar chart. Horizontal axis: year, 1986 to 2026. Vertical axis: number of publications, 0 to 18. Peak 18 publications in 2018. 1986: 1 publication 1987: 0 publications 1988: 1 publication 1989: 0 publications 1990: 0 publications 1991: 0 publications 1992: 1 publication 1993: 3 publications 1994: 0 publications 1995: 2 publications 1996: 1 publication 1997: 2 publications 1998: 1 publication 1999: 3 publications 2000: 9 publications 2001: 4 publications 2002: 3 publications 2003: 1 publication 2004: 3 publications 2005: 2 publications 2006: 5 publications 2007: 4 publications 2008: 8 publications 2009: 7 publications 2010: 1 publication 2011: 4 publications 2012: 4 publications 2013: 2 publications 2014: 4 publications 2015: 12 publications 2016: 17 publications 2017: 7 publications 2018: 18 publications 2019: 17 publications 2020: 13 publications 2021: 10 publications 2022: 5 publications 2023: 8 publications 2024: 7 publications 2025: 8 publications 2026: 2 publications
1986 2026

200 publications in total across all disciplines

View publications per year as a table
Raymond G. Najjar: publications per year, 1986 to 2026
Year Publications
1986 1
1987 0
1988 1
1989 0
1990 0
1991 0
1992 1
1993 3
1994 0
1995 2
1996 1
1997 2
1998 1
1999 3
2000 9
2001 4
2002 3
2003 1
2004 3
2005 2
2006 5
2007 4
2008 8
2009 7
2010 1
2011 4
2012 4
2013 2
2014 4
2015 12
2016 17
2017 7
2018 18
2019 17
2020 13
2021 10
2022 5
2023 8
2024 7
2025 8
2026 2
Total 200
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Raymond G. Najjar 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 Raymond G. Najjar 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, 158–167 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: 163 publications — 46th percentile

46% 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
158–167 458 163
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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Raymond G. Najjar 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 Raymond G. Najjar 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, 52 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: 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.

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 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
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Overview

Raymond G. Najjar is affiliated with Pennsylvania State University in the United States. Their research primarily spans the fields of Earth and Planetary Sciences and Environmental Science, with significant focus on subfields such as Oceanography, Global and Planetary Change, Environmental Chemistry, Ecology, and Pollution.

Najjar's work explores a range of topics related to marine and coastal ecosystems, oceanographic and atmospheric processes, and environmental gas dynamics. Specific research interests include ocean acidification effects and responses, methane hydrates, coastal wetland ecosystem dynamics, and marine biology and ecology research.

Frequently, Najjar collaborates with other researchers including Marjorie A. M. Friedrichs, Pierre St-Laurent, Maria Herrmann, Elizabeth H. Shadwick, and Hanqin Tian.

The scientist has published extensively in several notable academic venues. These include:

  • Global Biogeochemical Cycles
  • Estuaries and Coasts
  • Goldschmidt Abstracts
  • Zenodo (CERN European Organization for Nuclear Research)
  • Biogeosciences

Some recent papers authored or co-authored by Najjar are:

  • The land-to-ocean loops of the global carbon cycle, 2022, Nature
  • Coastal vegetation and estuaries are collectively a greenhouse gas sink, 2023, Nature Climate Change
  • A Synthesis of Global Coastal Ocean Greenhouse Gas Fluxes, 2024, Global Biogeochemical Cycles
  • Extent and Causes of Chesapeake Bay Warming, 2021, JAWRA Journal of the American Water Resources Association
  • Tidal Wetland Gross Primary Production Across the Continental United States, 2000-2019, 2020, Global Biogeochemical Cycles

Best Publications

  • Anthropogenic ocean acidification over the twenty-first century and its impact on calcifying organisms

    James C. Orr;Victoria J. Fabry;Olivier Aumont;Laurent Bopp

  • The land-to-ocean loops of the global carbon cycle

    Unknown

  • Potential climate-change impacts on the Chesapeake Bay

    Raymond G. Najjar;Christopher R. Pyke;Mary Beth Adams;Denise Breitburg

  • Downward transport and fate of organic matter in the ocean: Simulations with a general circulation model.

    Raymond G. Najjar;Jorge Louis Sarmiento;J. R. Toggweiler

  • Evaluating Global Ocean Carbon Models: The Importance of Realistic Physics

    Scott C. Doney;Keith Lindsay;K. Caldeira;J.-M. Campin;J.-M. Campin

  • A new coupled, one-dimensional biological-physical model for the upper ocean: Applications to the JGOFS Bermuda Atlantic Time-series Study (BATS) site

    Scott C. Doney;David M. Glover;Raymond G. Najjar

  • The potential impacts of climate change on the mid-Atlantic coastal region

    Raymond G. Najjar;Henry A. Walker;Patti J. Anderson;Eric J. Barron

  • Impact of circulation on export production, dissolved organic matter, and dissolved oxygen in the ocean: Results from Phase II of the Ocean Carbon-cycle Model Intercomparison Project (OCMIP-2)

    Raymond G. Najjar;X. Jin;F. Louanchi;Olivier Aumont

  • Increasing N abundance in the northwestern Pacific Ocean due to atmospheric nitrogen deposition.

    Tae Wook Kim;Kitack Lee;Raymond G. Najjar;Hee Dong Jeong

  • Evaluation of ocean carbon cycle models with data-based metrics

    K. Matsumoto;Jorge L. Sarmiento;Robert M. Key;Olivier Aumont

  • Distribution of nitrate, phosphate and silicate in the world oceans

    Sydney Levitus;Margarita E. Conkright;Joseph L. Reid;Raymond Gabriel Najjar

  • Evaluation of ocean model ventilation with CFC-11: comparison of 13 global ocean models

    Jean-Claude Dutay;John L. Bullister;Scott C. Doney;James C. Orr

  • Ocean stagnation and end-Permian anoxia

    Roberta M. Hotinski;Karen L. Bice;Lee R. Kump;Raymond G. Najjar

  • Relating estimates of CaCO3 production, export, and dissolution in the water column to measurements of CaCO3 rain into sediment traps and dissolution on the sea floor: A revised global carbonate budget

    W. M. Berelson;W. M. Balch;R. Najjar;R. A. Feely

  • Biogeochemical protocols and diagnostics for the CMIP6 Ocean Model Intercomparison Project (OMIP)

    James C. Orr;Raymond G. Najjar;Olivier Aumont;Laurent Bopp

  • Carbon budget of tidal wetlands, estuaries, and shelf waters of Eastern North America

    R. G. Najjar;M. Herrmann;R. Alexander;E. W. Boyer

  • Denitrification effects on air-sea CO2 flux in the coastal ocean: Simulations for the northwest North Atlantic

    Katja Fennel;John Wilkin;Michael Previdi;Raymond Najjar

  • Coastal vegetation and estuaries are collectively a greenhouse gas sink

    Unknown

  • Seasonal variations in the atmospheric O2/N2 ratio in relation to the kinetics of air‐sea gas exchange

    Ralph F. Keeling;Britton B. Stephens;Raymond G. Najjar;Scott C. Doney

  • Remote sensing retrievals of colored dissolved organic matter and dissolved organic carbon dynamics in North American estuaries and their margins

    Fang Cao;Maria Tzortziou;Chuanmin Hu;Antonio Mannino

  • Impact of climate variation and change on Mid-Atlantic Region hydrology and water resources

    Rob Neff;Heejun Chang;C. Gregory Knight;Raymond G. Najjar

  • Net ecosystem production and organic carbon balance of U.S. East Coast estuaries: A synthesis approach

    Maria Herrmann;Raymond G. Najjar;W. Michael Kemp;Richard B. Alexander

  • Ocean carbon-cycle dynamics and atmospheric Pco2

    J. L. Sarmiento;J. R. Toggweiler;R. Najjar

Frequent Co-Authors

Marjorie A. M. Friedrichs
Marjorie A. M. Friedrichs Virginia Institute of Marine Science
Hanqin Tian
Hanqin Tian Auburn University
Scott C. Doney
Scott C. Doney University of Virginia
James C. Orr
James C. Orr French Alternative Energies and Atomic Energy Commission (CEA)
Keith Lindsay
Keith Lindsay National Center for Atmospheric Research
Fortunat Joos
Fortunat Joos University of Bern
Anne Mouchet
Anne Mouchet University of Liège
Andrew Yool
Andrew Yool National Oceanography Centre
Eileen E. Hofmann
Eileen E. Hofmann Old Dominion University
Reiner Schlitzer
Reiner Schlitzer Alfred Wegener Institute for Polar and Marine Research

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