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Environmental Sciences
Singapore
2023

D-Index & Metrics

Discipline name D-Index World Ranking Current World Ranking National Ranking Current National Ranking Publications Citations
Earth Science 65 1428 1268 5 5 199 13151

Alan D. Ziegler publications per year

The chart shows the history of publications by Alan D. Ziegler between 1991 and 2025, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. Alan D. Ziegler published across 35 years, from 1991 to 2025, averaging 8.2 papers a year. Output peaked at 20 publications in 2017. 31 of the 287 publications appeared in the last two years.

No. of publications
5 10 15 20
Bar chart. Horizontal axis: year, 1991 to 2025. Vertical axis: number of publications, 0 to 20. Peak 20 publications in 2017. 1991: 2 publications 1992: 0 publications 1993: 0 publications 1994: 0 publications 1995: 0 publications 1996: 3 publications 1997: 6 publications 1998: 5 publications 1999: 0 publications 2000: 7 publications 2001: 10 publications 2002: 4 publications 2003: 7 publications 2004: 6 publications 2005: 1 publication 2006: 10 publications 2007: 8 publications 2008: 5 publications 2009: 7 publications 2010: 3 publications 2011: 8 publications 2012: 17 publications 2013: 10 publications 2014: 13 publications 2015: 12 publications 2016: 14 publications 2017: 20 publications 2018: 13 publications 2019: 10 publications 2020: 7 publications 2021: 20 publications 2022: 12 publications 2023: 16 publications 2024: 11 publications 2025: 20 publications
1991 2025

287 publications in total across all disciplines

View publications per year as a table
Alan D. Ziegler: publications per year, 1991 to 2025
Year Publications
1991 2
1992 0
1993 0
1994 0
1995 0
1996 3
1997 6
1998 5
1999 0
2000 7
2001 10
2002 4
2003 7
2004 6
2005 1
2006 10
2007 8
2008 5
2009 7
2010 3
2011 8
2012 17
2013 10
2014 13
2015 12
2016 14
2017 20
2018 13
2019 10
2020 7
2021 20
2022 12
2023 16
2024 11
2025 20
Total 287
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Alan D. Ziegler 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 Alan D. Ziegler 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, 198–207 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: 199 publications — 63rd percentile

63% 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
168–177 490
178–187 414
188–197 401
198–207 333 199
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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Alan D. Ziegler 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 Alan D. Ziegler 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, 65 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: 65 D-Index — 85th percentile

85% 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
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 65
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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Research.com Recognitions

  • 2023 - Research.com Environmental Sciences in Singapore Leader Award
  • 2022 - Research.com Environmental Sciences in Singapore Leader Award

Overview

Alan D. Ziegler is affiliated with the National University of Singapore and has contributed extensively to the field of Environmental Science. Their research spans multiple subfields including Global and Planetary Change, Health, Toxicology and Mutagenesis, Ecology, Atmospheric Science, and Environmental Engineering.

The scientist's work primarily focuses on several recurring topics, notably:

  • Climate variability and models
  • Flood Risk Assessment and Management
  • Plant Water Relations and Carbon Dynamics
  • Pharmaceutical and Antibiotic Environmental Impacts
  • Conservation, Biodiversity, and Resource Management
  • Land Use and Ecosystem Services
  • Urban Heat Island Mitigation

Alan D. Ziegler has published numerous research articles, with significant contributions appearing in journals such as Nature Sustainability, Environmental Research Letters, Sustainability, ACS ES&T Water, and Nature Geoscience.

Some of the recent papers include:

  • High-spatiotemporal-resolution mapping of global urban change from 1985 to 2015, 2020, Nature Sustainability
  • Doubling of annual forest carbon loss over the tropics during the early twenty-first century, 2022, Nature Sustainability
  • Rewetting global wetlands effectively reduces major greenhouse gas emissions, 2022, Nature Geoscience
  • Energy production and water savings from floating solar photovoltaics on global reservoirs, 2023, Nature Sustainability
  • Deforestation-induced warming over tropical mountain regions regulated by elevation, 2020, Nature Geoscience

Frequent co-authors with whom Alan D. Ziegler has collaborated include:

  • Zhenzhong Zeng
  • Dashan Wang
  • Jie Wu
  • Shijing Liang
  • Philippe Ciais

The publication trends show a consistent presence in journals that focus on sustainability, environmental impact, and geosciences. This profile aligns with the scientist's involvement in topics addressing both localized and global environmental challenges.

Best Publications

  • Erosion processes in steep terrain—Truths, myths, and uncertainties related to forest management in Southeast Asia

    Roy C. Sidle;Alan D. Ziegler;Junjiro N. Negishi;Abdul Rahim Nik

  • Trends, drivers and impacts of changes in swidden cultivation in tropical forest-agriculture frontiers: A global assessment

    Nathalie van Vliet;Ole Mertz;Andreas Heinimann;Tobias Langanke

  • The Rubber Juggernaut

    Alan D. Ziegler;Jefferson M. Fox;Jianchu Xu

  • A reversal in global terrestrial stilling and its implications for wind energy production

    Zhenzhong Zeng;Zhenzhong Zeng;Alan D. Ziegler;Timothy Searchinger;Long Yang

  • Current trends of rubber plantation expansion may threaten biodiversity and livelihoods

    Antje Ahrends;Antje Ahrends;Peter M. Hollingsworth;Peter M. Hollingsworth;Alan D. Ziegler;Jefferson M. Fox

  • Importance of rural roads as source areas for runoff in mountainous areas of northern Thailand

    Alan D. Ziegler;Thomas W. Giambelluca

  • Highland cropland expansion and forest loss in Southeast Asia in the twenty-first century

    Zhenzhong Zeng;Lyndon Estes;Alan D. Ziegler;Anping Chen

  • Environmental Consequences of the Demise in Swidden Cultivation in Southeast Asia: Carbon Storage and Soil Quality

    Thilde Bech Bruun;Andreas de Neergaard;Deborah Lawrence;Alan D. Ziegler

  • Carbon stocks in bamboo ecosystems worldwide: Estimates and uncertainties

    Jia Qi Yuen;Tak Fung;Alan D. Ziegler

  • Carbon outcomes of major land-cover transitions in SE Asia: great uncertainties and REDD+ policy implications

    Alan D. Ziegler;Jacob Phelps;Jia Qi Yuen;Edward L. Webb

  • Environmental Consequences of the Demise in Swidden Cultivation in Montane Mainland Southeast Asia: Hydrology and Geomorphology

    Alan D. Ziegler;Thilde B. Bruun;Maite Guardiola-Claramonte;Thomas W. Giambelluca

  • Consequences of Swidden Transitions for Crop and Fallow Biodiversity in Southeast Asia

    Kanok Rerkasem;Deborah Lawrence;Christine Padoch;Dietrich Schmidt-Vogt

  • Detection of Intensification in Global- and Continental-Scale Hydrological Cycles: Temporal Scale of Evaluation

    Alan D. Ziegler;Justin Sheffield;Edwin P. Maurer;Bart Nijssen

  • Doubling of annual forest carbon loss over the tropics during the early twenty-first century

    Unknown

  • Hydrological consequences of landscape fragmentation in mountainous northern Vietnam: evidence of accelerated overland flow generation

    Alan D Ziegler;Alan D Ziegler;Thomas W Giambelluca;Liem T Tran;Thomas T Vana

  • Accumulation of potentially toxic elements in road deposited sediments in residential and light industrial neighborhoods of Singapore.

    J. Q. Yuen;Paul H. Olin;H. S. Lim;Shawn G. Benner

  • Rewetting global wetlands effectively reduces major greenhouse gas emissions

    Unknown

  • Swidden, rubber and carbon: Can REDD+ work for people and the environment in Montane Mainland Southeast Asia?

    Jefferson Fox;Jean-Christophe Castella;Alan D. Ziegler

  • Runoff generation and sediment production on unpaved roads, footpaths and agricultural land surfaces in northern Thailand

    Alan D. Ziegler;Ross A. Sutherland;Thomas W. Giambelluca

  • Deforestation in the Ayeyarwady Delta and the conservation implications of an internationally-engaged Myanmar

    Edward L. Webb;Nicholas R.A. Jachowski;Jacob Phelps;Daniel A. Friess

  • Raw attitudes, wetland cultures, life-cycles: Socio-cultural dynamics relating to Opisthorchis viverrini in the Mekong Basin

    Carl Grundy-Warr;Ross H. Andrews;Paiboon Sithithaworn;Trevor N. Petney

  • Towards resilient flood risk management for Asian coastal cities: Lessons learned from Hong Kong and Singapore

    F.K.S. Chan;F.K.S. Chan;C. Joon Chuah;A.D. Ziegler;M. Dąbrowski

  • Hydrologic effects of the expansion of rubber (Hevea brasiliensis) in a tropical catchment

    Maite Guardiola-Claramonte;Peter A. Troch;Alan D. Ziegler;Thomas W. Giambelluca

  • Mangrove biomass estimation in Southwest Thailand using machine learning

    Nicholas R.A. Jachowski;Michelle S.Y. Quak;Daniel A. Friess;Decha Duangnamon

Frequent Co-Authors

Thomas W. Giambelluca
Thomas W. Giambelluca University of Hawaii at Manoa
Ross A. Sutherland
Ross A. Sutherland University of Hawaii at Manoa
Robert J. Wasson
Robert J. Wasson Australian National University
Jefferson Fox
Jefferson Fox East-West Center
Daniel A. Friess
Daniel A. Friess Tulane University
Roy C. Sidle
Roy C. Sidle University of Central Asia
Edward L. Webb
Edward L. Webb University of Helsinki
Xixi Lu
Xixi Lu National University of Singapore
Eric F. Wood
Eric F. Wood Princeton University
Tjeerd J. Bouma
Tjeerd J. Bouma Royal Netherlands Institute for Sea Research

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