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Plant Science and Agronomy
Denmark
2023

D-Index & Metrics

Discipline name D-Index World Ranking Current World Ranking National Ranking Current National Ranking Publications Citations
Environmental Sciences 57 3406 3255 40 40 270 13978

Per Ambus publications per year

The chart shows the history of publications by Per Ambus between 1991 and 2026, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. Per Ambus published across 36 years, from 1991 to 2026, averaging 9.1 papers a year. Output peaked at 35 publications in 2009. 16 of the 328 publications appeared in the last two years.

No. of publications
10 20 30
Bar chart. Horizontal axis: year, 1991 to 2026. Vertical axis: number of publications, 0 to 35. Peak 35 publications in 2009. 1991: 1 publication 1992: 1 publication 1993: 3 publications 1994: 2 publications 1995: 1 publication 1996: 2 publications 1997: 1 publication 1998: 2 publications 1999: 7 publications 2000: 3 publications 2001: 13 publications 2002: 4 publications 2003: 6 publications 2004: 8 publications 2005: 11 publications 2006: 12 publications 2007: 14 publications 2008: 3 publications 2009: 35 publications 2010: 12 publications 2011: 22 publications 2012: 10 publications 2013: 19 publications 2014: 18 publications 2015: 5 publications 2016: 11 publications 2017: 9 publications 2018: 7 publications 2019: 10 publications 2020: 8 publications 2021: 13 publications 2022: 12 publications 2023: 17 publications 2024: 10 publications 2025: 12 publications 2026: 4 publications
1991 2026

328 publications in total across all disciplines

View publications per year as a table
Per Ambus: publications per year, 1991 to 2026
Year Publications
1991 1
1992 1
1993 3
1994 2
1995 1
1996 2
1997 1
1998 2
1999 7
2000 3
2001 13
2002 4
2003 6
2004 8
2005 11
2006 12
2007 14
2008 3
2009 35
2010 12
2011 22
2012 10
2013 19
2014 18
2015 5
2016 11
2017 9
2018 7
2019 10
2020 8
2021 13
2022 12
2023 17
2024 10
2025 12
2026 4
Total 328
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Per Ambus 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 Per Ambus 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, 261–270 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: 270 publications — 81st percentile

81% 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
191–200 377
201–210 318
211–220 282
221–230 263
231–240 220
241–250 217
251–260 180
261–270 181 270
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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Per Ambus 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 Per Ambus 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, 57 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: 57 D-Index — 65th percentile

65% 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
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 57
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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Research.com Recognitions

  • 2023 - Research.com Plant Science and Agronomy in Denmark Leader Award
  • 2022 - Research.com Plant Science and Agronomy in Denmark Leader Award

Overview

Per Ambus is affiliated with the University of Copenhagen in Denmark and has contributed extensively to research in Earth and Planetary Sciences and Environmental Science. Their work predominantly focuses on atmospheric science, ecology, global and planetary change, soil science, and environmental chemistry.

Their research covers a range of topics including:

  • Climate change and permafrost
  • Cryospheric studies and observations
  • Soil carbon and nitrogen dynamics
  • Peatlands and wetlands ecology
  • Atmospheric and environmental gas dynamics
  • Soil and water nutrient dynamics
  • Fire effects on ecosystems

Among their recent publications are the following:

  • Field measurements of atmosphere-biosphere interactions in a Danish beech forest, 2024, Research Portal (King's College London)
  • A review of the importance of mineral nitrogen cycling in the plant-soil-microbe system of permafrost-affected soils-changing the paradigm, 2021, Environmental Research Letters
  • Microbial carbon use efficiency along an altitudinal gradient, 2022, Soil Biology and Biochemistry
  • Analysis of narwhal tusks reveals lifelong feeding ecology and mercury exposure, 2021, Current Biology
  • Deepened snow enhances gross nitrogen cycling among Pan-Arctic tundra soils during both winter and summer, 2021, Soil Biology and Biochemistry

Frequent co-authors of Per Ambus include Bo Elberling, Wenyi Xu, Anders Michelsen, Laura Helene Rasmussen, and Christina Biasi, reflecting collaboration in diverse aspects of environmental and soil sciences.

The scientist has published regularly in several scholarly journals, with notable venues including:

  • SSRN Electronic Journal
  • Soil Biology and Biochemistry
  • Geoderma
  • Applied Soil Ecology
  • Biogeochemistry

Best Publications

  • Atmospheric composition change: Ecosystems–Atmosphere interactions

    D. Fowler;Kim Pilegaard;M.A. Sutton;Per Ambus

  • INTERSPECIFIC COMPETITION, N USE AND INTERFERENCE WITH WEEDS IN PEA-BARLEY INTERCROPPING

    Henrik Hauggaard-Nielsen;Per Ambus;Erik Steen Jensen

  • Effects of slow and fast pyrolysis biochar on soil C and N turnover dynamics

    Esben W. Bruun;Per Ambus;Helge Egsgaard;Henrik Hauggaard-Nielsen

  • Full accounting of the greenhouse gas (CO2, N2O, CH4) budget of nine European grassland sites

    J.F. Soussana;V. Allard;K. Pilegaard;P. Ambus

  • Freeze–thaw regime effects on carbon and nitrogen dynamics in sub-arctic heath tundra mesocosms

    P Grogan;Anders Michelsen;P Ambus;Sven Evert Jonasson

  • Evaluating effects of sewage sludge and household compost on soil physical, chemical and microbiological properties

    Kasia Debosz;Søren O Petersen;Liv K Kure;Per Ambus

  • Influence of fast pyrolysis temperature on biochar labile fraction and short-term carbon loss in a loamy soil

    Esben Bruun;Henrik Hauggaard-Nielsen;Norazana Ibrahim;Norazana Ibrahim;Helge Egsgaard

  • Pea-barley intercropping for efficient symbiotic N2-fixation, soil N acquisition and use of other nutrients in European organic cropping systems

    Henrik Hauggaard-Nielsen;M. Gooding;Per Ambus;G. Corre-Hellou

  • Effects of climate and management intensity on nitrous oxide emissions in grassland systems across Europe

    C.R. Flechard;P. Ambus;U. Skiba;R.M. Rees

  • How does biochar influence soil N cycle? A meta-analysis

    Qi Liu;Yanhui Zhang;Benjuan Liu;James E. Amonette;James E. Amonette

  • The comparison of nitrogen use and leaching in sole cropped versus intercropped pea and barley

    Henrik Hauggaard-Nielsen;Per Ambus;Erik Steen Jensen

  • Temporal and spatial distribution of roots and competition for nitrogen in pea-barley intercrops – a field study employing 32P technique

    H. Hauggaard-Nielsen;P. Ambus;E.S. Jensen

  • Reduced N cycling in response to elevated CO2, warming, and drought in a Danish heathland: Synthesizing results of the CLIMAITE project after two years of treatments

    Klaus Steenberg Larsen;Louise C. Andresen;Claus Beier;Sven Jonasson

  • The competitive ability of pea-barley intercrops against weeds and the interactions with crop productivity and soil N availability

    G. Corre-Hellou;A. Dibet;Henrik Hauggaard-Nielsen;Y. Crozat

  • Biochar application as a tool to decrease soil nitrogen losses (NH3 volatilization, N2O emissions, and N leaching) from croplands: Options and mitigation strength in a global perspective

    Qi Liu;Qi Liu;Benjuan Liu;Yanhui Zhang;Tianlong Hu

  • Factors controlling regional differences in forest soil emission of nitrogen oxides (NO and N 2 O)

    K. Pilegaard;U. Skiba;P. Ambus;C. Beier

  • Spatial and seasonal nitrous oxide and methane fluxes in Danish forest-, grassland-, and agroecosystems

    Per Lennart Ambus;Søren Christensen

  • Inventories of N2O and NO Emissions from European Forest Soils

    M. Kesik;P. Ambus;R. Baritz;N. Brüggemann

  • Application of biochar to soil and N2O emissions: potential effects of blending fast-pyrolysis biochar with anaerobically digested slurry

    Esben Bruun;Dorette Sophie Müller-Stöver;Per Ambus;Henrik Hauggaard-Nielsen

  • Nitrogen processes in terrestrial ecosystems

    Klaus Butterbach-Bahl;Per Gundersen;Per Ambus;Jürgen Augustin

  • Biomass production, symbiotic nitrogen fixation and inorganic N use in dual and tri-component annual intercrops

    Mette Klindt Andersen;Henrik Hauggaard-Nielsen;Per Ambus;Erik Steen Jensen

  • Sources of nitrous oxide emitted from European forest soils

    P. Ambus;S. Zechmeister-Boltenstern;K. Butterbach-Bahl

  • Comparison of Denitrification in Two Riparian Soils

    Per Ambus;Richard Lowrance

  • Experimental design of multifactor climate change experiments with elevated CO2, warming and drought: the CLIMAITE project

    Teis Nørgaard Mikkelsen;Claus Beier;S. Jonasson;M. Holmstrup

  • Emissions of nitrous oxide from arable organic and conventional cropping systems on two soil types

    Ngonidzashe Chirinda;Ngonidzashe Chirinda;Mette S. Carter;Kristian R. Albert;Per Ambus

  • Measurement of N2O emission from a fertilized grassland: An analysis of spatial variability

    Per Lennart Ambus;Søren Christensen

Frequent Co-Authors

Henrik Hauggaard-Nielsen
Henrik Hauggaard-Nielsen Roskilde University
Erik Steen Jensen
Erik Steen Jensen Swedish University of Agricultural Sciences
Kim Pilegaard
Kim Pilegaard Technical University of Denmark
Teis Nørgaard Mikkelsen
Teis Nørgaard Mikkelsen Technical University of Denmark
Claus Beier
Claus Beier University of Copenhagen
Anders Michelsen
Anders Michelsen University of Copenhagen
Klaus Steenberg Larsen
Klaus Steenberg Larsen University of Copenhagen
Andreas Ibrom
Andreas Ibrom Technical University of Denmark
Ute Skiba
Ute Skiba Natural Environment Research Council

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