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
Environmental Sciences 41 7694 7392 2744 2552 188 6700

Christopher J. Duffy publications per year

The chart shows the history of publications by Christopher J. Duffy between 1977 and 2025, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. Christopher J. Duffy published across 49 years, from 1977 to 2025, averaging 4.7 papers a year. Output peaked at 21 publications in 2015. 8 of the 230 publications appeared in the last two years.

No. of publications
5 10 15 20
Bar chart. Horizontal axis: year, 1977 to 2025. Vertical axis: number of publications, 0 to 21. Peak 21 publications in 2015. 1977: 1 publication 1978: 0 publications 1979: 0 publications 1980: 0 publications 1981: 0 publications 1982: 0 publications 1983: 0 publications 1984: 1 publication 1985: 1 publication 1986: 2 publications 1987: 1 publication 1988: 3 publications 1989: 1 publication 1990: 0 publications 1991: 1 publication 1992: 1 publication 1993: 4 publications 1994: 2 publications 1995: 0 publications 1996: 1 publication 1997: 1 publication 1998: 3 publications 1999: 3 publications 2000: 3 publications 2001: 2 publications 2002: 1 publication 2003: 3 publications 2004: 2 publications 2005: 0 publications 2006: 6 publications 2007: 5 publications 2008: 5 publications 2009: 6 publications 2010: 9 publications 2011: 9 publications 2012: 12 publications 2013: 11 publications 2014: 18 publications 2015: 21 publications 2016: 19 publications 2017: 8 publications 2018: 7 publications 2019: 8 publications 2020: 10 publications 2021: 18 publications 2022: 6 publications 2023: 7 publications 2024: 4 publications 2025: 4 publications
1977 2025

230 publications in total across all disciplines

View publications per year as a table
Christopher J. Duffy: publications per year, 1977 to 2025
Year Publications
1977 1
1978 0
1979 0
1980 0
1981 0
1982 0
1983 0
1984 1
1985 1
1986 2
1987 1
1988 3
1989 1
1990 0
1991 1
1992 1
1993 4
1994 2
1995 0
1996 1
1997 1
1998 3
1999 3
2000 3
2001 2
2002 1
2003 3
2004 2
2005 0
2006 6
2007 5
2008 5
2009 6
2010 9
2011 9
2012 12
2013 11
2014 18
2015 21
2016 19
2017 8
2018 7
2019 8
2020 10
2021 18
2022 6
2023 7
2024 4
2025 4
Total 230
Download as CSV

Christopher J. Duffy 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 Christopher J. Duffy 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, 181–190 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: 188 publications — 60th percentile

60% 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
181–190 400 188
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
Download as CSV

Christopher J. Duffy 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 Christopher J. Duffy 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, 41 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: 41 D-Index — 22nd percentile

22% 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 41
42 305
43 336
44 330
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
Download as CSV

Overview

Christopher J. Duffy is affiliated with Pennsylvania State University in the United States and has contributed extensively to environmental science, with a particular focus on hydrology and watershed management. Their work spans multiple interconnected subfields including environmental engineering, water science and technology, and artificial intelligence applied in environmental contexts.

The research topics covered by Duffy include:

  • Hydrology and Watershed Management Studies
  • Hydrological Forecasting Using AI
  • Groundwater Flow and Contamination Studies
  • Flood Risk Assessment and Management
  • Soil and Unsaturated Flow
  • Neural Networks and Applications
  • Data Stream Mining Techniques

Duffy's publication record includes papers appearing in venues such as arXiv (Cornell University), Water Resources Research, Geoscientific Model Development, Hydrology and Earth System Sciences, and ACM Transactions on Interactive Intelligent Systems.

Among recent papers are:

  • Lake thermal structure drives interannual variability in summer anoxia dynamics in a eutrophic lake over 37 years (2021, Hydrology and Earth System Sciences)
  • Artificial Intelligence for Modeling Complex Systems: Taming the Complexity of Expert Models to Improve Decision Making (2021, ACM Transactions on Interactive Intelligent Systems)
  • Regionalization in a Global Hydrologic Deep Learning Model: From Physical Descriptors to Random Vectors (2022, Water Resources Research)
  • Physics Guided Machine Learning Methods for Hydrology (2020, arXiv)
  • Capturing hotspots of fresh submarine groundwater discharge using a coupled surface-subsurface model (2021, Journal of Hydrology)

Duffy frequently collaborates with a group of researchers active in related fields. Their common co-authors include John L. Nieber, Vipin Kumar, Michael Steinbach, Lele Shu, and Rahul Ghosh, reflecting interdisciplinary and collaborative research approaches.

The concentration of Duffy's work on environmental and engineering challenges involving water flow, hydrological prediction, and the integration of artificial intelligence methods provides insight into their scientific interests and expertise.

Best Publications

  • Ecohydrology of water-limited environments: A scientific vision

    Brent D. Newman;Bradford P. Wilcox;Steven R. Archer;David D. Breshears

  • A semidiscrete finite volume formulation for multiprocess watershed simulation

    Yizhong Qu;Christopher J. Duffy

  • An Agenda for Land-Surface Hydrology Research and a Call for the Second International Hydrological Decade

    Dara Entekhabi;Ghassem R. Asrar;Alan K. Betts;Keith J. Beven

  • Most computational hydrology is not reproducible, so is it really science?

    Christopher Hutton;Thorsten Wagener;Jim Freer;Dawei Han

  • Groundwater circulation in a closed desert basin: Topographic scaling and climatic forcing

    Christopher J. Duffy;Sumani Al-Hassan

  • Simulating the river-basin response to atmospheric forcing by linking a mesoscale meteorological model and hydrologic model system

    Z Yu;M.N Lakhtakia;B Yarnal;R.A White

  • Critical Zone Observatories: Building a network to advance interdisciplinary study of Earth surface processes

    Suzanne P. Anderson;R. C. Bales;C. J. Duffy

  • A tightly coupled GIS and distributed hydrologic modeling framework

    Gopal Bhatt;Mukesh Kumar;Christopher J. Duffy

  • Fully coupled approach to modeling shallow water flow, sediment transport, and bed evolution in rivers

    Shuangcai Li;Christopher J. Duffy

  • A TWO-STATE INTEGRAL-BALANCE MODEL FOR SOIL MOISTURE AND GROUNDWATER DYNAMICS IN COMPLEX TERRAIN

    Christopher J. Duffy

  • A Second-Order Accurate, Finite Volume–Based, Integrated Hydrologic Modeling (FIHM) Framework for Simulation of Surface and Subsurface Flow

    Mukesh Kumar;Christopher J. Duffy;Karen M. Salvage

  • Development of a Coupled Land Surface Hydrologic Model and Evaluation at a Critical Zone Observatory

    Yuning Shi;Kenneth J. Davis;Christopher J. Duffy;Xuan Yu

  • Soil carbon, multiple benefits

    Eleanor Milne;Eleanor Milne;Steven A. Banwart;Elke Noellemeyer;David James Abson

  • Characterization of deep weathering and nanoporosity development in shale—A neutron study

    Lixin Jin;Gernot Rother;David R. Cole;David F.R. Mildner

  • Soil Processes and Functions in Critical Zone Observatories: Hypotheses and Experimental Design

    Steven Banwart;Stefano M. Bernasconi;Jaap Bloem;Winfried Blum

  • Understanding watershed hydrogeochemistry: 2. Synchronized hydrological and geochemical processes drive stream chemostatic behavior.

    Li Li;Chen Bao;Pamela L. Sullivan;Susan Brantley

  • Density-driven groundwater flow in closed desert basins: field investigations and numerical experiments

    Ying Fan;Christopher J Duffy;Douglas S Oliver

  • Soil processes and functions across an international network of Critical Zone Observatories: Introduction to experimental methods and initial results

    Steven Banwart;Manoj Menon;Stefano M. Bernasconi;Jaap Bloem

  • Searching for electromagnetic counterparts to gravitational-wave merger events with the prototype Gravitational-wave Optical Transient Observer (GOTO-4)

    Benjamin P. Gompertz;Ryan J. Cutter;D. Steeghs;D. Steeghs;D. K. Galloway

  • Hydrological Aspects of Weather Prediction and Flood Warnings: Report of the Ninth Prospectus Development Team of the U.S. Weather Research Program.

    Kelvin K. Droegemeier;J. D. Smith;S. Businger;C. Doswell

  • A Frequency Domain Approach to Water Quality Modeling in Groundwater: Theory

    Christopher J. Duffy;L. W. Gelhar

  • Lake thermal structure drives interannual variability in summer anoxia dynamics in a eutrophic lake over 37 years

    Robert Ladwig;Paul C. Hanson;Hilary A. Dugan;Cayelan C. Carey

Frequent Co-Authors

P. T. O'Brien
P. T. O'Brien University of Leicester
Yolanda Gil
Yolanda Gil University of Southern California
Susan L. Brantley
Susan L. Brantley Pennsylvania State University
Felix Aharonian
Felix Aharonian Dublin Institute For Advanced Studies
Michael Backes
Michael Backes University of Oxford
Kenneth J. Davis
Kenneth J. Davis Pennsylvania State University
Vipin Kumar
Vipin Kumar University of Minnesota
Thorsten Wagener
Thorsten Wagener University of Potsdam
Justyn R. Maund
Justyn R. Maund Royal Holloway University of London
Andrew J. Levan
Andrew J. Levan University of Warwick

If you think any of the details on this page are incorrect, let us know.

Report an issue

We appreciate your kind effort to assist us to improve this page, it would be helpful providing us with as much detail as possible in the text box below:

Related Online Degrees & Career Pathways

For those interested in Environmental Sciences, exploring related online degrees can open diverse career opportunities. Many students seek low cost online general studies degree programs to balance affordability with flexibility, making education accessible without compromising quality.

If you prefer a degree that combines manageability with relevance, consider programs listed under easy bachelor degrees. These can serve as stepping stones toward specialized fields within environmental sciences or related disciplines.

Specializations like geology are closely tied to Environmental Sciences. Pursuing a geology online degree equips students with essential knowledge about Earth processes, fostering careers in natural resource management, conservation, and environmental consulting.

Geographic Information Systems (GIS) also play a crucial role in analyzing environmental data. The best GIS programs in the US prepare students for technical roles that involve spatial mapping and environmental monitoring, enhancing data-driven decision-making in this evolving sector.

Best Scientists Citing Christopher J. Duffy

Trending Scientists

Recently Published Articles