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D-Index & Metrics

Discipline name D-Index World Ranking Current World Ranking National Ranking Current National Ranking Publications Citations
Environmental Sciences 44 6737 6469 2405 2233 178 7514

Gregory J. Hakim publications per year

The chart shows the history of publications by Gregory J. Hakim between 1992 and 2025, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. Gregory J. Hakim published across 34 years, from 1992 to 2025, averaging 6.7 papers a year. Output peaked at 23 publications in 2020. 29 of the 228 publications appeared in the last two years.

No. of publications
5 10 15 20
Bar chart. Horizontal axis: year, 1992 to 2025. Vertical axis: number of publications, 0 to 23. Peak 23 publications in 2020. 1992: 2 publications 1993: 1 publication 1994: 0 publications 1995: 2 publications 1996: 3 publications 1997: 3 publications 1998: 0 publications 1999: 0 publications 2000: 2 publications 2001: 3 publications 2002: 1 publication 2003: 2 publications 2004: 0 publications 2005: 8 publications 2006: 2 publications 2007: 5 publications 2008: 6 publications 2009: 3 publications 2010: 3 publications 2011: 3 publications 2012: 3 publications 2013: 18 publications 2014: 6 publications 2015: 9 publications 2016: 11 publications 2017: 15 publications 2018: 8 publications 2019: 19 publications 2020: 23 publications 2021: 13 publications 2022: 8 publications 2023: 17 publications 2024: 16 publications 2025: 13 publications
1992 2025

228 publications in total across all disciplines

View publications per year as a table
Gregory J. Hakim: publications per year, 1992 to 2025
Year Publications
1992 2
1993 1
1994 0
1995 2
1996 3
1997 3
1998 0
1999 0
2000 2
2001 3
2002 1
2003 2
2004 0
2005 8
2006 2
2007 5
2008 6
2009 3
2010 3
2011 3
2012 3
2013 18
2014 6
2015 9
2016 11
2017 15
2018 8
2019 19
2020 23
2021 13
2022 8
2023 17
2024 16
2025 13
Total 228
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Gregory J. Hakim 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 Gregory J. Hakim 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, 171–180 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: 178 publications — 55th percentile

55% 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
151–160 539
161–170 444
171–180 444 178
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
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Gregory J. Hakim 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 Gregory J. Hakim 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, 44 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: 44 D-Index — 32nd percentile

32% 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 44
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
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
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Overview

Gregory J. Hakim is affiliated with the University of Washington in the United States. Their research spans multiple fields and topics related to Earth sciences and environmental studies.

Hakim's main fields of study include:

  • Earth and Planetary Sciences
  • Environmental Science

Within these areas, their work delves into subfields such as:

  • Atmospheric Science
  • Global and Planetary Change
  • Oceanography
  • Environmental Engineering
  • Information Systems

Their research addresses a range of main topics, including:

  • Climate variability and models
  • Geology and Paleoclimatology Research
  • Meteorological Phenomena and Simulations
  • Atmospheric and Environmental Gas Dynamics
  • Tree-ring climate responses
  • Cryospheric studies and observations
  • Arctic and Antarctic ice dynamics

Hakim's recent publications include:

  • "Glacial cooling and climate sensitivity revisited" (2020, Nature)
  • "Globally resolved surface temperatures since the Last Glacial Maximum" (2021, Nature)
  • "Rate of mass loss from the Greenland Ice Sheet will exceed Holocene values this century" (2020, Nature)
  • "Spatial patterns of climate change across the Paleocene-Eocene Thermal Maximum" (2022, Proceedings of the National Academy of Sciences)
  • "Resolving the Differences in the Simulated and Reconstructed Temperature Response to Volcanism" (2020, Geophysical Research Letters)

The scientist has coauthored frequently with a group of collaborators, including:

  • Jérôme Patoux
  • Julien Emile-Geay
  • Jonathan King
  • Eric J. Steig
  • Feng Zhu

Hakim has also contributed to book publications, notably with Cambridge University Press, where they authored a book titled Weather published in 2021.

Their work has appeared primarily in the following publication venues:

  • Zenodo (CERN European Organization for Nuclear Research)
  • Geophysical Research Letters
  • Journal of Climate
  • Weather
  • arXiv (Cornell University)

Best Publications

  • Globally resolved surface temperatures since the Last Glacial Maximum.

    Matthew B Osman;Jessica E Tierney;Jiang Zhu;Robert Tardif

  • Glacial cooling and climate sensitivity revisited

    Jessica Erin Tierney;Jiang Zhu;Jiang Zhu;Jonathan King;Steven Brewster Malevich

  • Consistent multi-decadal variability in global temperature reconstructions and simulations over the Common Era.

    Raphael Neukom;Luis A. Barboza;Michael P. Erb;Feng Shi

  • The last millennium climate reanalysis project: Framework and first results

    Gregory J. Hakim;Julien Emile-Geay;Eric J. Steig;David Noone

  • Comparing Adjoint- and Ensemble-Sensitivity Analysis with Applications to Observation Targeting

    Brian Ancell;Gregory J. Hakim

  • Ensemble-Based Sensitivity Analysis

    Ryan D. Torn;Gregory J. Hakim

  • Boundary Conditions for Limited-Area Ensemble Kalman Filters

    Ryan D. Torn;Gregory J. Hakim;Chris Snyder

  • Last Millennium Reanalysis with an expanded proxy database and seasonal proxy modeling

    Robert Tardif;Gregory J. Hakim;Walter A. Perkins;Kaleb A. Horlick

  • The 1993 Superstorm Cold Surge: Frontal Structure, Gap Flow, and Tropical Impact

    David M. Schultz;W. Edward Bracken;Lance F. Bosart;Gregory J. Hakim

  • Assimilation of Time-Averaged Pseudoproxies for Climate Reconstruction

    Nathan J. Steiger;Gregory J. Hakim;Eric J. Steig;David S. Battisti

  • The Ohio Valley Wave-Merger Cyclogenesis Event of 25–26 January 1978. Part II: Diagnosis Using Quasigeostrophic Potential Vorticity Inversion

    Gregory J. Hakim;Daniel Keyser;Lance F. Bosart

  • Spatial patterns of climate change across the Paleocene–Eocene Thermal Maximum

    Unknown

  • A New Surface Model for Cyclone–Anticyclone Asymmetry

    Gregory J. Hakim;Chris Snyder;David J. Muraki

  • Rate of mass loss from the Greenland Ice Sheet will exceed Holocene values this century

    Jason P. Briner;Joshua K. Cuzzone;Joshua K. Cuzzone;Jessica A. Badgeley;Nicolás E. Young

  • Ensemble Synoptic Analysis

    Gregory J. Hakim;Ryan D. Torn

  • Developing Wave Packets in the North Pacific Storm Track

    Gregory J. Hakim

  • Large-Scale Antecedent Conditions Associated with the 12 14 March 1993 Cyclone (``Superstorm '93'') over Eastern North America

    Lance F. Bosart;Gregory J. Hakim;Kevin R. Tyle;Mary A. Bedrick

  • Initial Condition Sensitivity of Western Pacific Extratropical Transitions Determined Using Ensemble-Based Sensitivity Analysis

    Ryan D. Torn;Gregory J. Hakim

  • Performance Characteristics of a Pseudo-Operational Ensemble Kalman Filter

    Ryan D. Torn;Gregory J. Hakim

  • Composite Structure of Tropopause Polar Cyclones

    Steven M. Cavallo;Gregory J. Hakim

  • The Ohio Valley Wave-Merger Cyclogenesis Event of 25–26 January 1978. Part I: Multiscale Case Study

    Gregory J. Hakim;Lance F. Bosart;Daniel Keyser

  • Chapter 12 – Middle Atmosphere Dynamics

    James R. Holton;Gregory J. Hakim

  • Glacial cooling and climate sensitivity revisited

    Jessica E Tierney;Steven B Malevich;Jiang Zhu;Jonathan King

Frequent Co-Authors

Eric J. Steig
Eric J. Steig University of Washington
Julien Emile-Geay
Julien Emile-Geay University of Southern California
David Noone
David Noone University of Auckland
Kevin J. Anchukaitis
Kevin J. Anchukaitis University of Arizona
Jessica E. Tierney
Jessica E. Tierney University of Arizona
Lance F. Bosart
Lance F. Bosart University at Albany, State University of New York
Jason P. Briner
Jason P. Briner University at Buffalo, State University of New York
Mathieu Morlighem
Mathieu Morlighem Dartmouth College
Eric Larour
Eric Larour California Institute of Technology
David M. Schultz
David M. Schultz University of Manchester

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