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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 42 7436 7145 334 313 112 6361

Ryan W. Allen publications per year

The chart shows the history of publications by Ryan W. Allen between 2001 and 2024, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. Ryan W. Allen published across 24 years, from 2001 to 2024, averaging 5.1 papers a year. Output peaked at 15 publications in 2011. 9 of the 122 publications appeared in the last two years.

No. of publications
5 10 15
Bar chart. Horizontal axis: year, 2001 to 2024. Vertical axis: number of publications, 0 to 15. Peak 15 publications in 2011. 2001: 1 publication 2002: 0 publications 2003: 1 publication 2004: 1 publication 2005: 4 publications 2006: 2 publications 2007: 2 publications 2008: 3 publications 2009: 9 publications 2010: 1 publication 2011: 15 publications 2012: 5 publications 2013: 10 publications 2014: 8 publications 2015: 8 publications 2016: 8 publications 2017: 3 publications 2018: 11 publications 2019: 6 publications 2020: 2 publications 2021: 5 publications 2022: 8 publications 2023: 5 publications 2024: 4 publications
2001 2024

122 publications in total across all disciplines

View publications per year as a table
Ryan W. Allen: publications per year, 2001 to 2024
Year Publications
2001 1
2002 0
2003 1
2004 1
2005 4
2006 2
2007 2
2008 3
2009 9
2010 1
2011 15
2012 5
2013 10
2014 8
2015 8
2016 8
2017 3
2018 11
2019 6
2020 2
2021 5
2022 8
2023 5
2024 4
Total 122
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Ryan W. Allen 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 Ryan W. Allen 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, 111–120 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: 112 publications — 19th percentile

19% 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
111–120 541 112
121–130 617
131–140 544
141–150 541
151–160 539
161–170 444
171–180 444
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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Ryan W. Allen 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 Ryan W. Allen 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, 42 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: 42 D-Index — 25th percentile

25% 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 42
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
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Overview

Ryan W. Allen is affiliated with Simon Fraser University in Canada, concentrating research efforts in the fields of Environmental Science and Medicine. Their work primarily addresses topics relating to air quality and health impacts, energy and environmental impacts, climate change and health impacts, noise effects and management, air quality monitoring and forecasting, birth, development, and health, and fire dynamics and safety research.

The main fields of study for this scientist include Environmental Science with 34 publications and Medicine with 15 publications. Subfields of particular focus are Health, Toxicology and Mutagenesis (21 publications), Pollution (6), Speech and Hearing (5), Pediatrics, Perinatology and Child Health (4), and Environmental Engineering (4).

Ryan W. Allen has published extensively in various venues, frequently contributing to:

  • ISEE Conference Abstracts
  • Environment International
  • Current Environmental Health Reports
  • International Journal of Environmental Research and Public Health
  • Ecotoxicology and Environmental Safety

The scientist's notable recent papers include:

  • Individual- and Household-Level Interventions to Reduce Air Pollution Exposures and Health Risks: a Review of the Recent Literature, 2020, Current Environmental Health Reports
  • Can Public Spaces Effectively Be Used as Cleaner Indoor Air Shelters during Extreme Smoke Events?, 2021, International Journal of Environmental Research and Public Health
  • An updated systematic review and meta-analysis on portable air cleaners and blood pressure: Recommendations for users and manufacturers, 2023, Ecotoxicology and Environmental Safety
  • Public Health Messaging for Wildfire Smoke: Cast a Wide Net, 2022, Frontiers in Public Health
  • Using Latent Profile Analysis to Identify Associations Between Gestational Chemical Mixtures and Child Neurodevelopment, 2022, Epidemiology

Frequent collaborators in their research include Buyantushig Boldbaatar, Lawrence C. McCandless, Bruce P. Lanphear, Enkhjargal Gombojav, and Chimeglkham Banzrai. This group of coauthors has worked with Ryan W. Allen on multiple occasions, contributing to various publications and advancing research themes related to environmental health and pollution.

Best Publications

  • Low-level lead exposure and mortality in US adults: a population-based cohort study

    Bruce P Lanphear;Stephen Rauch;Peggy Auinger;Ryan W Allen

  • Pulmonary effects of indoor- and outdoor-generated particles in children with asthma.

    Jane Q. Koenig;Therese F. Mar;Ryan W. Allen;Karen Jansen

  • An Air Filter Intervention Study of Endothelial Function among Healthy Adults in a Woodsmoke-impacted Community

    Ryan W. Allen;Chris Carlsten;Barbara Karlen;Sara Leckie

  • Temporal stability of land use regression models for traffic-related air pollution

    Rongrong Wang;Sarah B. Henderson;Sarah B. Henderson;Hind Sbihi;Ryan W. Allen

  • Use of real-time light scattering data to estimate the contribution of infiltrated and indoor-generated particles to indoor air.

    Ryan Allen;Timothy Larson;Lianne Sheppard;Lance Wallace

  • The spatial relationship between traffic-generated air pollution and noise in 2 US cities

    Ryan W. Allen;Hugh Davies;Martin A. Cohen;Gary Mallach

  • An assessment of air pollution and its attributable mortality in Ulaanbaatar, Mongolia.

    Ryan W. Allen;Enkhjargal Gombojav;Baldorj Barkhasragchaa;Tsogtbaatar Byambaa

  • Prospective Study of Particulate Air Pollution Exposures, Subclinical Atherosclerosis, and Clinical Cardiovascular Disease: The Multi-Ethnic Study of Atherosclerosis and Air Pollution (MESA Air)

    Joel D. Kaufman;Sara D. Adar;Ryan W. Allen;R. Graham Barr

  • Modeling the residential infiltration of outdoor PM2.5 in the multi-ethnic study of atherosclerosis and air pollution (MESA Air)

    Ryan W. Allen;Sara D. Adar;Ed Avol;Martin Cohen

  • Approach to Estimating Participant Pollutant Exposures in the Multi-Ethnic Study of Atherosclerosis and Air Pollution (MESA Air)

    Martin A Cohen;Sara D Adar;Ryan W Allen;Edward Avol

  • Comparing universal kriging and land-use regression for predicting concentrations of gaseous oxides of nitrogen (NOx) for the Multi-Ethnic Study of Atherosclerosis and Air Pollution (MESA Air).

    Laina D. Mercer;Adam A. Szpiro;Lianne Sheppard;Johan Lindström;Johan Lindström

  • Fine particulate matter air pollution, proximity to traffic, and aortic atherosclerosis.

    Ryan W. Allen;Michael H. Criqui;Ana V. Diez Roux;Matthew Allison

  • Land use regression modelling of air pollution in high density high rise cities : a case study in Hong Kong

    Martha Lee;Michael Brauer;Paulina Wong;Robert Tang

  • A land use regression model for ultrafine particles in Vancouver, Canada.

    Rebecca C. Abernethy;Ryan W. Allen;Ian G. McKendry;Michael Brauer

  • Evaluation of random forest regression and multiple linear regression for predicting indoor fine particulate matter concentrations in a highly polluted city.

    Weiran Yuchi;Enkhjargal Gombojav;Buyantushig Boldbaatar;Jargalsaikhan Galsuren

  • From good intentions to proven interventions: effectiveness of actions to reduce the health impacts of air pollution.

    Luisa V. Giles;Prabjit Barn;Nino Künzli;Nino Künzli;Isabelle Romieu

  • Long term exposure to air pollution and mortality in an elderly cohort in Hong Kong.

    Yang Yang;Robert Tang;Hong Qiu;Poh Chin Lai

  • Factors influencing variability in the infiltration of PM2.5 mass and its components

    M. MacNeill;L. Wallace;J. Kearney;R.W. Allen

  • Changes in Lung Function and Airway Inflammation Among Asthmatic Children Residing in a Woodsmoke-Impacted Urban Area

    Ryan W. Allen;Therese Mar;Jane Koenig;L.-J. Sally Liu

  • Indoor/Outdoor relationships, trends, and carbonaceous content of fine particulate matter in retirement homes of the Los Angeles Basin.

    Andrea Polidori;Mohammad Arhami;Constantinos Sioutas;Ralph J Delfino

Frequent Co-Authors

Michael Brauer
Michael Brauer University of British Columbia
Timothy V. Larson
Timothy V. Larson University of Washington
Bruce P. Lanphear
Bruce P. Lanphear Simon Fraser University
Joel D. Kaufman
Joel D. Kaufman University of Washington
Stuart E. Turvey
Stuart E. Turvey University of British Columbia
Linwei Tian
Linwei Tian University of Hong Kong
Sarah B. Henderson
Sarah B. Henderson University of British Columbia
Lianne Sheppard
Lianne Sheppard University of Washington
Malcolm R. Sears
Malcolm R. Sears McMaster University
Lance Wallace
Lance Wallace Environmental Protection Agency

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