Total 2,453,121 scientists, country 221, and institutions 24,478 are evaluated in the Productivity Rankings, an exclusive service provided by AD Scientific Index. This ranking measures and highlights the scientific productivity of researchers based on the i10 index (number of publications with at least 10 citations). This system identifies highly productive scientists across disciplines, institutions, and regions, contributing to the development of evidence-based academic policies and effective incentive mechanisms. The rankings include global, regional, and institutional analyses, along with specialized rankings such as Scientists' Last 6 Years' i10 Index and Universities' i10 Index Rankings 2025. With Premium Membership, you can:
- Gain full access to detailed comparisons and advanced analytics,
- Objectively evaluate your academic productivity,
- Make strategic, data-driven decisions to enhance performance.
* Total i10 IndexRankings
Ranking Based On Selection: 1

chemistry
physics
astrochemistry
theoretical chemistry
spectroscopy
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
272
134
0.493
* Total i10 IndexRankings
Ranking Based On Selection: 2

Atmospheric Chemistry
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
254
83
0.327
* Total i10 IndexRankings
Ranking Based On Selection: 3

atmospheric chemistry
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
151
58
0.384
* Total i10 IndexRankings
Ranking Based On Selection: 4

Ammonia
Air Quality
Tropospheric Chemistry
Chemical Ionization Mass Spectrometry
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
122
101
0.828
* Total i10 IndexRankings
Ranking Based On Selection: 5

Chemistry-Climate Modeling
Ozone
Stratospheric Chemistry
Volcanic Eruptions and Climate
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
108
92
0.852
* Total i10 IndexRankings
Ranking Based On Selection: 6

High temperature chemistry
chemical thermodynamics
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
105
56
0.533
* Total i10 IndexRankings
Ranking Based On Selection: 7

Astrochemistry
Chemistry
Astrobiology
Planetary Science
Radiation
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
70
51
0.729
* Total i10 IndexRankings
Ranking Based On Selection: 8

planetary science
physical chemistry
physical properties of ices
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
68
61
0.897
* Total i10 IndexRankings
Ranking Based On Selection: 9

Atmospheric Chemistry
Air Pollution
Remote Sensing
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
67
62
0.925
* Total i10 IndexRankings
Ranking Based On Selection: 10

Astrobiology
Planetary Science
Analytical Chemistry
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
60
43
0.717
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* Total i10 IndexRankings
Ranking Based On Selection: 11

chemistry-climate interactions
trends in atmospheric pollutants
atmospheric chemistry modeling
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
58
52
0.897
* Total i10 IndexRankings
Ranking Based On Selection: 12

Astrochemistry
Organic Chemistry
Natural Products
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
49
40
0.816
* Total i10 IndexRankings
Ranking Based On Selection: 13

Atmospheric Chemistry
Satellite Remote Sensing of Trace Gases
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
45
24
0.533
* Total i10 IndexRankings
Ranking Based On Selection: 14

Atmospheric Chemistry
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
41
37
0.902
* Total i10 IndexRankings
Ranking Based On Selection: 15

chemistry
atmospheric sciences
quantum chemistry
astrochemistry
astrobiology
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
37
25
0.676
* Total i10 IndexRankings
Ranking Based On Selection: 16

surface engineering
thermal materials
battery architecture
bonding
structural composite
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
37
22
0.595
* Total i10 IndexRankings
Ranking Based On Selection: 17

Atmospheric chemistry
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
32
31
0.969
* Total i10 IndexRankings
Ranking Based On Selection: 18

Atmospheric Chemistry
In-situ measurements
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
30
28
0.933
* Total i10 IndexRankings
Ranking Based On Selection: 19

Environmental chemistry
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
26
16
0.615
* Total i10 IndexRankings
Ranking Based On Selection: 20

Atmospheric chemistry
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
25
16
0.640
* Total i10 IndexRankings
Ranking Based On Selection: 21

Chemistry in the Solar System and planet-forming regions
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
23
22
0.957
* Total i10 IndexRankings
Ranking Based On Selection: 22

Atmospheric chemistry
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
23
21
0.913
* Total i10 IndexRankings
Ranking Based On Selection: 23

Electroanalytical Chemistry
Separation Science
Microfluidic Devices
Analytical Instrumentation
Astrobiology
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
21
17
0.810
* Total i10 IndexRankings
Ranking Based On Selection: 24

Laser ablation
LIBS
Plasma Physics
Analytical Chemistry
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
21
15
0.714
* Total i10 IndexRankings
Ranking Based On Selection: 25

Mass spectrometry
quadrupole ion trap
planetary atmospheres
ice giants
gas giants
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
18
6
0.333
Timothy J Lee
NASA Ames Research Center
California, United States
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
272
134
0.493
chemistry
physics
astrochemistry
theoretical chemistry
spectroscopy
Hanwant Singh
NASA Ames Research Center
California, United States
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
254
83
0.327
Stanley P Sander
NASA Ames Research Center
California, United States
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
151
58
0.384
John B Nowak
NASA Ames Research Center
California, United States
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
122
101
0.828
Ammonia
Air Quality
Tropospheric Chemistry
Chemical Ionization Mass Spectrometry
Luke D Oman
NASA Ames Research Center
California, United States
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
108
92
0.852
Chemistry-Climate Modeling
Ozone
Stratospheric Chemistry
Volcanic Eruptions and Climate
Nathan Jacobson
NASA Ames Research Center
California, United States
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
105
56
0.533
High temperature chemistry
chemical thermodynamics
Perry Gerakines
NASA Ames Research Center
California, United States
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
70
51
0.729
Astrochemistry
Chemistry
Astrobiology
Planetary Science
Radiation
Mathieu Choukroun
NASA Ames Research Center
California, United States
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
68
61
0.897
planetary science
physical chemistry
physical properties of ices
Can Li
NASA Ames Research Center
California, United States
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
67
62
0.925
Atmospheric Chemistry
Air Pollution
Remote Sensing
Peter A Willis
NASA Ames Research Center
California, United States
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
60
43
0.717
Astrobiology
Planetary Science
Analytical Chemistry
Enroll all your faculty members with discounted institutional membership to showcase your institution's academic strength to the world in the best way possible – join now and achieve results fast!
Sarah Strode
NASA Ames Research Center
California, United States
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
58
52
0.897
chemistry-climate interactions
trends in atmospheric pollutants
atmospheric chemistry modeling
José Carlos Aponte
NASA Ames Research Center
California, United States
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
49
40
0.816
Astrochemistry
Organic Chemistry
Natural Products
James Gleason
NASA Ames Research Center
California, United States
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
45
24
0.533
Atmospheric Chemistry
Satellite Remote Sensing of Trace Gases
Jin Liao
NASA Ames Research Center
California, United States
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
41
37
0.902
Partha P Bera
NASA Ames Research Center
California, United States
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
37
25
0.676
chemistry
atmospheric sciences
quantum chemistry
astrochemistry
astrobiology
Frank L Palmieri
NASA Ames Research Center
California, United States
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
37
22
0.595
surface engineering
thermal materials
battery architecture
bonding
structural composite
Katherine Travis
NASA Ames Research Center
California, United States
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
32
31
0.969
Hannah S Halliday
NASA Ames Research Center
California, United States
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
30
28
0.933
Atmospheric Chemistry
In-situ measurements
William T Wallace
NASA Ames Research Center
California, United States
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
26
16
0.615
Emma Yates
NASA Ames Research Center
California, United States
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
25
16
0.640
Edith Fayolle
NASA Ames Research Center
California, United States
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
23
22
0.957
Chemistry in the Solar System and planet-forming regions
Travis N Knepp
NASA Ames Research Center
California, United States
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
23
21
0.913
Mauro S Ferreira Santos
NASA Ames Research Center
California, United States
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
21
17
0.810
Electroanalytical Chemistry
Separation Science
Microfluidic Devices
Analytical Instrumentation
Astrobiology
Alexander A Bol'Shakov
NASA Ames Research Center
California, United States
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
21
15
0.714
Laser ablation
LIBS
Plasma Physics
Analytical Chemistry
Jurij Simcic
NASA Ames Research Center
California, United States
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
18
6
0.333
Mass spectrometry
quadrupole ion trap
planetary atmospheres
ice giants
gas giants