World's Best Scientists 2026 revealed!
Roger A. Cooper

Roger A. Cooper

D-Index & Metrics

Environmental Sciences

D-Index
41
Citations
6963
World Ranking
7677
National Ranking
46

Roger A. Cooper 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 Roger A. Cooper sits on this spectrum.

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 publications 690+

This scientist: 99 publications — 13th percentile

13% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 690 publications or more.

Roger A. Cooper 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 Roger A. Cooper sits on this spectrum.

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.

Overview

Roger A. Cooper is affiliated with GNS Science in New Zealand and conducts research primarily in Earth and Planetary Sciences.

The scientist's work spans several subfields, including:

  • Paleontology
  • Geophysics
  • Oceanography

Cooper's research covers a range of main topics such as:

  • Paleontology and Stratigraphy of Fossils
  • Geological and Geochemical Analysis
  • High-pressure geophysics and materials
  • Evolution and Paleontology Studies
  • Marine Biology and Ecology Research

The scientist has published in several academic venues, with frequent publications appearing in:

  • Earth-Science Reviews
  • Paleobiology

Notable recent papers include:

  • Evolution of the East Gondwana convergent margin in Antarctica, southern Australia and New Zealand from the Neoproterozoic to latest Devonian (2021), published in Earth-Science Reviews
  • Ephemeral species in the fossil record? Synchronous coupling of macroevolutionary dynamics in mid-Paleozoic zooplankton (2020), published in Paleobiology

Frequent co-authors in their work include:

  • R. A. Glen
  • James S. Crampton
  • Michael Foote
  • Peter M. Sadler

Best Publications

  • The Cambrian Period

    Shanchi Peng;Loren E. Babcock;Per Ahlberg

  • Stratigraphic framework and time slices

    Barry D Webby;Roger A Cooper;Stig M Bergström;Florentin Paris

  • Reconnaissance sandstone geochemistry, provenance, and tectonic setting of the lower Paleozoic terranes of the West Coast and Nelson, New Zealand

    B. P. Roser;R. A. Cooper;S. Nathan;A. J. Tulloch

  • The Ordovician Period

    R.A. Cooper;P.M. Sadler

  • The New Zealand biota: Historical background and new research

    Roger A. Cooper;Philip R. Millener

  • Global Stratotype Section and Point for base of the Ordovician System

    R. A. Cooper;G. S. Nowlan;S. H. Williams

  • The Silurian Period

    M. J. Melchin;R. A. Cooper;P. M. Sadler

  • The Oligocene bottleneck and New Zealand biota: genetic record of a past environmental crisis

    Alan Cooper;Roger A. Cooper

  • Estimating the Rock Volume Bias in Paleobiodiversity Studies

    James S. Crampton;Alan G. Beu;Roger A. Cooper;Craig M. Jones

  • The Ordovician graptolite sequence of Australasia

    A.H.M. Vandenberg;R.A. Cooper

  • Rise and fall of species occupancy in Cenozoic fossil mollusks.

    Michael Foote;James S. Crampton;Alan G. Beu;Bruce A. Marshall

  • The Ordovician graptolites of Spitsbergen

    R A Cooper;R A Fortey

  • Early Paleozoic terranes of New Zealand

    R. A. Cooper

  • Early Palaeozoic terranes in New Zealand and their relationship to the Lachlan Fold Belt

    R.A Cooper;A.J Tulloch

  • High-resolution, early Paleozoic (Ordovician-Silurian) time scales

    Peter M. Sadler;Roger A. Cooper;Michael Melchin

  • Latitudinal and depth zonation of early Ordovician graptolites

    Roger A. Cooper;Richard A. Fortey;Kristina Lindholm

  • Completeness of the fossil record: Estimating losses due to small body size

    Roger A. Cooper;Phillip A. Maxwell;James S. Crampton;Alan G. Beu

  • New Zealand Geological Timescale NZGT 2015/1

    JI Raine;AG Beu;AF Boyes;HJ Campbell

  • Graptoloid evolutionary rates track Ordovician–Silurian global climate change

    Roger A. Cooper;Peter M. Sadler;Axel Munnecke;James S. Crampton

  • Greenhouse−icehouse transition in the Late Ordovician marks a step change in extinction regime in the marine plankton

    James S. Crampton;James S. Crampton;Roger A. Cooper;Peter M. Sadler;Michael Foote

  • On the bidirectional relationship between geographic range and taxonomic duration

    Michael Foote;James S. Crampton;Alan G. Beu;Roger A. Cooper

  • Ecostratigraphy, zonation and global correlation of earliest Ordovician planktic graptolites

    Roger A. Cooper

  • A precise worldwide correlation of early Ordovician graptolite sequences

    R. A. Cooper;K. Lindholm

  • Palaeoecology of the Graptoloidea

    R. A. Cooper;S. Rigby;David Loydell;Denis E. B. Bates

  • The Cambrian arc complex of the Takaka Terrane, New Zealand: An integrated stratigraphical, paleontological and geochemical approach

    Carsten Münker;Roger Cooper

Frequent Co-Authors

James S. Crampton
James S. Crampton Victoria University of Wellington
Peter M. Sadler
Peter M. Sadler University of California, Riverside
Michael J. Melchin
Michael J. Melchin St. Francis Xavier University
Christopher J. Hollis
Christopher J. Hollis Victoria University of Wellington
Loren E. Babcock
Loren E. Babcock The Ohio State University
Stig M. Bergström
Stig M. Bergström The Ohio State University
Carsten Münker
Carsten Münker University of Cologne
Geoffrey Playford
Geoffrey Playford University of Queensland
Richard A. Fortey
Richard A. Fortey Natural History Museum
Gregory D. Edgecombe
Gregory D. Edgecombe Natural History Museum

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