World's Best Scientists 2026 revealed!
Ramdane Alkama

Ramdane Alkama

D-Index & Metrics

Environmental Sciences

D-Index
35
Citations
8794
World Ranking
9222
National Ranking
291

Ramdane Alkama 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 Ramdane Alkama 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: 283 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: 25 scientists 501–510 publications: 17 scientists 511–520 publications: 18 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 681–686 publications: 3 scientists 687+ publications: 100 scientists
41 publications 687+

This scientist: 77 publications — 4th percentile

4% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 687 publications or more.

Ramdane Alkama 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 Ramdane Alkama 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: 199 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: 19 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: 99 scientists
30 D-Index 125+

This scientist: 35 D-Index — 5th percentile

5% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 125 D-Index or more.

Overview

Ramdane Alkama is affiliated with the Joint Research Center in Spain and specializes in Environmental Science, with a notable focus on Global and Planetary Change. Their research contributions span several subfields, including Atmospheric Science, Plant Science, Nature and Landscape Conservation, and Environmental Engineering.

The scientist's main topics of work include:

  • Climate variability and models
  • Atmospheric and Environmental Gas Dynamics
  • Plant Water Relations and Carbon Dynamics
  • Hydrology and Drought Analysis
  • Plant responses to elevated CO2
  • Fire effects on ecosystems
  • Cryospheric studies and observations

Ramdane Alkama has contributed to a range of scientific publications. Some recent papers include:

  • Global Carbon Budget 2022, 2022, Earth system science data
  • Recent global decline of CO2 fertilization effects on vegetation photosynthesis, 2020, Science
  • Emerging signals of declining forest resilience under climate change, 2022, Nature
  • Increased control of vegetation on global terrestrial energy fluxes, 2020, Nature Climate Change
  • Critical adjustment of land mitigation pathways for assessing countries' climate progress, 2021, Nature Climate Change

The scientist has collaborated frequently with several researchers, including:

  • Alessandro Cescatti
  • Philippe Ciais
  • Pierre Friedlingstein
  • Julia Pongratz
  • Stephen Sitch

Ramdane Alkama's publications are often found in the following venues:

  • Zenodo (CERN European Organization for Nuclear Research)
  • Nature Communications
  • Earth system science data
  • Science
  • Nature Climate Change

Best Publications

  • The CNRM-CM5.1 global climate model: description and basic evaluation

    A. Voldoire;E. Sanchez-Gomez;D. Salas y Mélia;B. Decharme

  • Biophysical climate impacts of recent changes in global forest cover

    Ramdane Alkama;Alessandro Cescatti

  • The SURFEXv7.2 land and ocean surface platform for coupled or offline simulation of earth surface variables and fluxes

    V. Masson;P. Le Moigne;E. Martin;S. Faroux

  • Recent global decline of CO2 fertilization effects on vegetation photosynthesis

    Songhan Wang;Songhan Wang;Yongguang Zhang;Yongguang Zhang;Yongguang Zhang;Weimin Ju;Weimin Ju;Jing M. Chen;Jing M. Chen

  • Air temperature optima of vegetation productivity across global biomes.

    Mengtian Huang;Shilong Piao;Shilong Piao;Philippe Ciais;Josep Peñuelas

  • Satellites reveal contrasting responses of regional climate to the widespread greening of Earth

    Giovanni Forzieri;Ramdane Alkama;Diego G. Miralles;Alessandro Cescatti

  • Increased control of vegetation on global terrestrial energy fluxes

    Giovanni Forzieri;Diego G. Miralles;Philippe Ciais;Ramdane Alkama

  • Anthropogenic influence on multidecadal changes in reconstructed global evapotranspiration

    H. Douville;A. Ribes;B. Decharme;R. Alkama

  • Reconciling global-model estimates and country reporting of anthropogenic forest CO2 sinks

    Giacomo Grassi;Jo House;Werner A. Kurz;Alessandro Cescatti

  • Vegetation-based climate mitigation in a warmer and greener World

    Unknown

  • Critical adjustment of land mitigation pathways for assessing countries’ climate progress

    Giacomo Grassi;Elke Stehfest;Joeri Rogelj;Joeri Rogelj;Detlef van Vuuren;Detlef van Vuuren

  • Global off-line evaluation of the ISBA-TRIP flood model

    B. Decharme;R. Alkama;F. Papa;F. Papa;S. Faroux

  • Variability in the sensitivity among model simulations of permafrost and carbon dynamics in the permafrost region between 1960 and 2009

    A. David McGuire;Charles Koven;David M. Lawrence;Joy S. Clein

  • Global Evaluation of the ISBA-TRIP Continental Hydrological System. Part II: Uncertainties in River Routing Simulation Related to Flow Velocity and Groundwater Storage

    B. Decharme;R. Alkama;H. Douville;M. Becker

  • The Global Land Carbon Cycle Simulated With ISBA-CTRIP: Improvements Over the Last Decade

    Christine Delire;Roland Séférian;Bertrand Decharme;Ramdane Alkama

  • Global Evaluation of the ISBA-TRIP Continental Hydrological System. Part I: Comparison to GRACE Terrestrial Water Storage Estimates and In Situ River Discharges

    R. Alkama;B. Decharme;H. Douville;M. Becker

  • Terrestrial Waters and Sea Level Variations on Interannual Time Scale

    W. Llovel;M. Becker;A. Cazenave;S. Jevrejeva

  • Impact of Freshwater Release in the North Atlantic under Different Climate Conditions in an OAGCM

    Didier Swingedouw;Juliette Mignot;Pascale Braconnot;Eloi Mosquet

  • Trends in Global and Basin-Scale Runoff over the Late Twentieth Century: Methodological Issues and Sources of Uncertainty

    R. Alkama;B. Decharme;H. Douville;A. Ribes

  • Quantifying the roles of ocean circulation and biogeochemistry in governing ocean carbon-13 and atmospheric carbon dioxide at the last glacial maximum

    A. Tagliabue;L. Bopp;D.M.V.A.P. Roche;D.M.V.A.P. Roche;N. Bouttes

  • Revealing the widespread potential of forests to increase low level cloud cover

    Gregory Duveiller;Federico Filipponi;Andrej Ceglar;Jędrzej Bojanowski

  • Detection of global runoff changes: results from observations and CMIP5 experiments

    R. Alkama;L. Marchand;A. Ribes;B. Decharme

Frequent Co-Authors

Bertrand Decharme
Bertrand Decharme Centre national de la recherche scientifique, CNRS
Hervé Douville
Hervé Douville Federal University of Toulouse Midi-Pyrénées
Alessandro Cescatti
Alessandro Cescatti European Union
Aurore Voldoire
Aurore Voldoire Federal University of Toulouse Midi-Pyrénées
Christine Delire
Christine Delire Centre national de la recherche scientifique, CNRS
Annette Rinke
Annette Rinke Alfred Wegener Institute for Polar and Marine Research
Stephen Sitch
Stephen Sitch University of Exeter
Sophie Szopa
Sophie Szopa Versailles Saint-Quentin-en-Yvelines University
Christophe Cassou
Christophe Cassou Centre national de la recherche scientifique, CNRS
Gurvan Madec
Gurvan Madec Sorbonne University

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