12.7K(top 0.1%)
papers
517.3K(top 0.1%)
citations
260(top 0.1%)
h-index
449(top 0.1%)
g-index
18.8K
all documents
610.4K
doc citations
8.8K
citing journals
Top Disciplines (by citations)
| # | Discipline | Articles | Citations | R ARank | R CRank |
|---|---|---|---|---|---|
| 1 | Science | 475 | 60,743 | 736 | 489 |
| 2 | Biology | 563 | 60,040 | 636 | 471 |
| 3 | Physics | 370 | 53,405 | 998 | 551 |
| 4 | Geophysics | 1,058 | 46,526 | 76 | 68 |
| 5 | Natural history | 161 | 41,510 | 406 | 354 |
| 6 | Marine Biology | 726 | 28,150 | 10 | 4 |
| 7 | Planets | 520 | 26,239 | 55 | 53 |
| 8 | Earth Sciences | 396 | 24,418 | 32 | 15 |
| 9 | Oceanography | 572 | 23,962 | 11 | 8 |
| 10 | Ecology | 380 | 22,332 | 375 | 356 |
| 11 | Meteorology | 611 | 21,859 | 34 | 67 |
| 12 | Biodiversity | 354 | 18,292 | 17 | 10 |
| 13 | Climatology | 507 | 18,226 | 21 | 50 |
| 14 | Biogeochemistry | 321 | 17,437 | 5 | 7 |
| 15 | Zoology | 471 | 17,172 | 22 | 5 |
| 16 | polar regions | 498 | 16,848 | 1 | 1 |
| 17 | Botany | 435 | 16,801 | 160 | 221 |
| 18 | Pollution | 165 | 16,721 | 557 | 282 |
| 19 | Microbiology | 163 | 16,146 | 1.0K | 578 |
| 20 | cryosphere | 386 | 14,000 | 1 | 1 |
| 21 | Atmospheric Physics | 392 | 13,691 | 58 | 91 |
| 22 | Environmental Health | 145 | 13,566 | 573 | 280 |
| 23 | Microbial Ecology | 157 | 13,245 | 152 | 124 |
| 24 | Chemistry | 238 | 12,837 | 1.5K | 1.2K |
| 25 | Atmospheric Chemistry | 283 | 11,357 | 45 | 83 |
| 26 | Environmental Engineering | 47 | 9,236 | 844 | 238 |
| 27 | sanitation | 42 | 9,190 | 417 | 148 |
| 28 | Environment | 131 | 9,178 | 569 | 546 |
| 29 | Geology | 265 | 9,083 | 170 | 151 |
| 30 | Algae | 176 | 8,950 | 12 | 4 |
| 31 | Medicine | 203 | 8,681 | 1.7K | 1.6K |
| 32 | Research | 215 | 8,465 | 1.2K | 988 |
| 33 | atmospheric models | 157 | 7,926 | 27 | 30 |
| 34 | Water pollution | 101 | 7,132 | 186 | 103 |
| 35 | Glaciology | 236 | 6,760 | 2 | 1 |
| 36 | glaciers | 202 | 6,386 | 4 | 2 |
| 37 | Biodiversity conservation | 85 | 6,185 | 199 | 235 |
| 38 | Seaweed | 105 | 6,023 | 12 | 5 |
| 39 | Climate change | 70 | 5,876 | 116 | 181 |
| 39 | Eutrophication | 70 | 5,876 | 111 | 181 |
| 41 | Biogeochemical cycles | 105 | 5,438 | 10 | 36 |
| 42 | radiocarbon dating | 14 | 5,375 | 130 | 27 |
| 43 | Paleoceanography | 101 | 5,347 | 7 | 12 |
| 44 | Europe | 150 | 4,965 | 285 | 136 |
| 45 | Physiology | 76 | 3,897 | 929 | 713 |
| 46 | Biochemistry | 57 | 3,779 | 3.1K | 1.9K |
| 47 | Marine Pollution | 44 | 3,680 | 75 | 28 |
| 48 | Marine Ecology | 103 | 3,440 | 9 | 6 |
| 49 | biological evolution | 44 | 2,747 | 482 | 460 |
| 50 | Environmental Microbiology | 43 | 2,745 | 204 | 192 |
| 51 | Paleontology | 43 | 2,584 | 356 | 122 |
| 52 | ecosystem | 67 | 2,578 | 98 | 189 |
| 53 | Data Mining | 55 | 2,560 | 99 | 123 |
| 53 | data collection | 55 | 2,560 | 29 | 68 |
| 55 | Water | 30 | 2,398 | 538 | 374 |
| 56 | Analytical Chemistry | 20 | 2,355 | 2.3K | 893 |
| 57 | Molecular Biology | 67 | 2,310 | 2.5K | 2.8K |
| 58 | Periglacial processes | 61 | 2,303 | 4 | 9 |
| 58 | Permafrost | 61 | 2,303 | 4 | 9 |
| 58 | Frozen ground | 63 | 2,303 | 4 | 9 |
| 61 | Comparative Physiology | 21 | 2,234 | 216 | 63 |
| 62 | global environmental change | 44 | 1,805 | 58 | 77 |
| 63 | Mathematics | 45 | 1,702 | 2.0K | 773 |
| 64 | Algal blooms | 52 | 1,699 | 4 | 15 |
| 64 | Cyanobacteria | 52 | 1,699 | 4 | 15 |
| 64 | microalgae | 52 | 1,699 | 4 | 15 |
| 67 | Engineering | 37 | 1,634 | 1.1K | 454 |
| 68 | Biogeography | 29 | 1,630 | 247 | 263 |
| 69 | Protozoa | 21 | 1,605 | 71 | 55 |
| 70 | Astronomy | 46 | 1,566 | 1.0K | 955 |
| 71 | Geochemistry | 66 | 1,534 | 240 | 267 |
| 72 | Paleoclimatology | 57 | 1,510 | 33 | 52 |
| 73 | Evolution | 21 | 1,507 | 797 | 603 |
| 74 | environmental pollution | 41 | 1,492 | 1.1K | 1.1K |
| 75 | Mass Spectrometry | 10 | 1,459 | 833 | 240 |
| 76 | Geography | 34 | 1,331 | 607 | 425 |
| 77 | Fisheries | 37 | 1,179 | 273 | 243 |
| 78 | Spectrum analysis | 9 | 1,172 | 2.9K | 1.2K |
| 79 | Molecular ecology | 39 | 1,155 | 251 | 475 |
| 80 | Toxicology | 37 | 1,146 | 1.6K | 1.5K |
| 81 | freshwater biology | 38 | 1,129 | 116 | 160 |
| 82 | Genomics | 47 | 1,115 | 815 | 1.1K |
| 83 | plankton | 44 | 1,112 | 6 | 8 |
| 84 | Geochemical Modeling | 53 | 1,071 | 24 | 80 |
| 84 | geological modeling | 53 | 1,071 | 27 | 84 |
| 86 | Marine algae | 29 | 1,063 | 8 | 2 |
| 87 | Biotechnology | 13 | 996 | 4.1K | 2.8K |
| 88 | Hydrology | 39 | 995 | 568 | 634 |
| 89 | Molecular Genetics | 27 | 994 | 637 | 723 |
| 90 | Plant physiology | 19 | 977 | 889 | 839 |
| 91 | natural products | 22 | 960 | 631 | 392 |
| 92 | Animal ecology | 10 | 959 | 723 | 342 |
| 93 | Pharmacognosy | 19 | 952 | 629 | 443 |
| 94 | Geobiology | 47 | 929 | 39 | 66 |
| 95 | Bioengineering | 9 | 879 | 3.2K | 2.1K |
| 96 | Paleoecology | 26 | 810 | 89 | 59 |
| 97 | Semantics | 5 | 788 | 194 | 10 |
| 98 | Aquatic ecology | 35 | 781 | 140 | 175 |
| 99 | Microorganisms | 18 | 757 | 465 | 567 |
| 100 | Marine Meteorology | 33 | 751 | 60 | 86 |
| 101 | Sedimentology | 43 | 750 | 60 | 189 |
| 102 | Aquaculture | 33 | 717 | 218 | 192 |
| 103 | bioclimatology | 19 | 711 | 207 | 171 |
| 104 | Molecular evolution | 10 | 709 | 894 | 598 |
| 105 | Meteorites | 25 | 706 | 160 | 187 |
| 106 | natural disasters | 29 | 686 | 198 | 298 |
| 107 | Plant Ecology | 18 | 678 | 639 | 712 |
| 108 | Population Genetics | 26 | 674 | 407 | 629 |
| 109 | Computational Biology | 25 | 671 | 1.1K | 1.3K |
| 110 | Radiation | 18 | 670 | 656 | 417 |
| 111 | Invertebrates | 11 | 653 | 149 | 49 |
| 112 | Environmental Management | 22 | 652 | 800 | 1.1K |
| 113 | Sustainable Development | 8 | 605 | 1.1K | 587 |
| 113 | sustainability | 8 | 605 | 437 | 278 |
| 115 | Environmental Policy | 24 | 603 | 917 | 1.4K |
| 115 | Marine biodiversity | 43 | 603 | 13 | 13 |
| 115 | Marine Geophysics | 25 | 603 | 32 | 32 |
| 118 | Genetics | 8 | 541 | 3.3K | 2.8K |
| 119 | Geodynamics | 16 | 537 | 58 | 49 |
| 120 | Analytical Biochemistry | 5 | 536 | 1.4K | 445 |
| 121 | emergency management | 23 | 510 | 120 | 134 |
| 122 | Reproduction | 10 | 507 | 1.6K | 1.2K |
| 123 | Geomagnetism | 25 | 490 | 239 | 246 |
| 124 | antibiotics | 10 | 477 | 203 | 121 |
| 125 | Paleogeography | 17 | 456 | 48 | 34 |
| 126 | Biochemical Engineering | 1 | 444 | 4.5K | 2.1K |
| 127 | Environmental pollutants | 18 | 443 | 823 | 1.1K |
| 128 | Environmental monitoring | 18 | 441 | 1.7K | 2.1K |
| 129 | Ecosystem management | 6 | 439 | 485 | 273 |
| 130 | venom | 10 | 429 | 192 | 137 |
| 130 | Toxins | 10 | 429 | 241 | 163 |
| 132 | environmental indicators | 6 | 426 | 254 | 131 |
| 133 | Fishery resources | 15 | 414 | 58 | 77 |
| 134 | Foraminifera | 11 | 412 | 26 | 23 |
| 135 | Chromosome mapping | 15 | 407 | 886 | 1.1K |
| 135 | gene mapping | 15 | 407 | 1.0K | 1.4K |
| 137 | environmental issues | 17 | 404 | 75 | 112 |
| 138 | biological invasions | 14 | 400 | 203 | 246 |
| 139 | Japan | 18 | 393 | 847 | 527 |
| 140 | environmental protection | 13 | 387 | 1.7K | 1.9K |
| 141 | Systems Biology | 25 | 384 | 458 | 674 |
| 142 | Phylogeny | 10 | 381 | 436 | 389 |
| 143 | pollutants | 14 | 372 | 774 | 1.0K |
| 144 | Bioorganic chemistry | 6 | 364 | 2.3K | 1.6K |
| 145 | Paleobotany | 9 | 354 | 60 | 52 |
| 145 | Vegetation dynamics | 9 | 354 | 57 | 50 |
| 147 | Soil Science | 14 | 336 | 695 | 787 |
| 148 | Bioremediation | 2 | 324 | 889 | 181 |
| 149 | Chemical Oceanography | 10 | 322 | 20 | 25 |
| 150 | exobiology | 6 | 321 | 284 | 214 |
| 151 | Organic Chemistry | 4 | 318 | 3.2K | 1.9K |
| 152 | Cytology | 14 | 317 | 2.9K | 3.7K |
| 153 | Ocean Engineering | 11 | 307 | 421 | 354 |
| 154 | Geomorphology | 21 | 289 | 229 | 509 |
| 155 | Coastal zone management | 11 | 288 | 100 | 100 |
| 156 | Hydrogeology | 5 | 284 | 586 | 254 |
| 157 | China | 22 | 283 | 974 | 1.2K |
| 158 | animals | 2 | 282 | 2.2K | 554 |
| 159 | Transport | 4 | 281 | 314 | 201 |
| 159 | Sea | 4 | 281 | 225 | 110 |
| 161 | Technology | 13 | 278 | 2.3K | 2.2K |
| 162 | Environmental Chemistry | 12 | 274 | 1.2K | 1.7K |
| 163 | Pharmacology | 13 | 267 | 3.5K | 4.0K |
| 164 | United States | 15 | 250 | 3.1K | 3.4K |
| 165 | Developmental Biology | 16 | 249 | 1.1K | 1.9K |
| 166 | water supply | 6 | 242 | 783 | 744 |
| 167 | Extreme environments | 4 | 238 | 217 | 149 |
| 168 | Geodesy | 10 | 221 | 244 | 217 |
| 169 | Ecophysiology | 14 | 213 | 26 | 60 |
| 169 | Photochemistry | 7 | 213 | 1.1K | 950 |
| 171 | Groundwater | 4 | 210 | 765 | 373 |
| 172 | plant communities | 3 | 208 | 1.3K | 1.1K |
| 173 | Biomedical Engineering | 6 | 206 | 4.5K | 3.8K |
| 174 | Light | 6 | 200 | 888 | 1.2K |
| 175 | Bacteriology | 2 | 199 | 2.5K | 1.7K |
| 176 | atmosphere | 12 | 194 | 159 | 247 |
| 177 | Cosmochemistry | 8 | 193 | 213 | 175 |
| 178 | Radioisotopes | 6 | 192 | 821 | 407 |
| 178 | Isotopes | 6 | 192 | 46 | 25 |
| 180 | Plant cells | 2 | 190 | 1.6K | 1.6K |
| 181 | Food Safety | 1 | 185 | 685 | 62 |
| 181 | Economic Development | 3 | 185 | 1.7K | 1.1K |
| 181 | food industry | 1 | 185 | 778 | 74 |
| 184 | Marine mammals | 7 | 182 | 197 | 201 |
| 185 | Optics | 14 | 180 | 2.8K | 2.8K |
| 185 | Mycology | 7 | 180 | 1.2K | 1.2K |
| 185 | mycoses | 7 | 180 | 654 | 1.1K |
| 185 | Fungi | 7 | 180 | 561 | 710 |
| 189 | Energy Policy | 2 | 178 | 2.3K | 1.5K |
| 189 | energy resources | 2 | 178 | 964 | 789 |
| 191 | Bioinformatics | 5 | 176 | 2.3K | 2.1K |
| 192 | Infections | 3 | 174 | 1.5K | 1.4K |
| 192 | infection | 3 | 174 | 2.1K | 1.6K |
| 192 | Virulence | 3 | 174 | 1.5K | 1.7K |
| 195 | hazard mitigation | 5 | 171 | 713 | 601 |
| 196 | Ichthyology | 13 | 169 | 155 | 176 |
| 196 | Fish | 13 | 169 | 112 | 139 |
| 198 | Anatomy | 14 | 166 | 1.1K | 1.9K |
| 199 | Marine resources | 6 | 164 | 184 | 168 |
| 200 | Marine invertebrates | 8 | 163 | 96 | 71 |
| 200 | Parasitology | 5 | 163 | 2.4K | 1.9K |
| 202 | Population | 8 | 160 | 543 | 591 |
| 203 | Aging | 2 | 159 | 4.4K | 2.4K |
| 204 | Environmental Toxicology | 7 | 152 | 1.9K | 2.6K |
| 204 | Physical Chemistry | 1 | 152 | 4.2K | 2.2K |
| 204 | Genetic markers | 1 | 152 | 751 | 145 |
| 204 | biochemical markers | 1 | 152 | 2.0K | 561 |
| 208 | Chromatography | 2 | 150 | 2.5K | 1.2K |
| 208 | Chromatographic analysis | 2 | 150 | 2.9K | 1.3K |
| 210 | Fishery management | 9 | 149 | 383 | 405 |
| 211 | Biosensors | 2 | 147 | 1.6K | 1.4K |
| 211 | Bioelectronics | 2 | 147 | 1.3K | 1.3K |
| 213 | Histochemistry | 4 | 146 | 1.2K | 939 |
| 214 | Bacteria | 1 | 141 | 645 | 412 |
| 215 | Sedimentary rocks | 4 | 138 | 195 | 79 |
| 216 | Earthquakes | 11 | 137 | 195 | 247 |
| 217 | Histology | 4 | 134 | 2.2K | 2.1K |
| 218 | Nonlinear Dynamics | 5 | 132 | 2.1K | 1.9K |
| 218 | Statistical physics | 5 | 132 | 3.3K | 2.8K |
| 220 | histological techniques | 3 | 131 | 936 | 1.0K |
| 221 | Catalysis | 5 | 130 | 3.0K | 3.1K |
| 221 | Nanostructured Materials | 5 | 130 | 3.1K | 3.1K |
| 223 | Australia | 4 | 128 | 2.1K | 1.4K |
| 224 | Organic Geochemistry | 5 | 127 | 38 | 76 |
| 224 | Mollusks | 6 | 127 | 118 | 75 |
| 226 | Physical organic chemistry | 4 | 126 | 1.5K | 1.2K |
| 227 | Wetland ecology | 5 | 124 | 347 | 369 |
| 227 | Respiration | 2 | 124 | 2.3K | 1.7K |
| 227 | wetland management | 3 | 124 | 171 | 141 |
| 230 | Fluid Mechanics | 8 | 121 | 1.5K | 1.6K |
| 230 | France | 9 | 121 | 218 | 142 |
| 230 | weather | 11 | 121 | 161 | 454 |
| 233 | sedimentary basins | 2 | 120 | 297 | 199 |
| 233 | Magnetic Resonance Spectroscopy | 8 | 120 | 833 | 959 |
| 235 | Clinical Chemistry | 1 | 119 | 4.9K | 3.2K |
| 235 | Cell Biology | 3 | 119 | 5.2K | 5.2K |
| 235 | Electrophoresis | 1 | 119 | 3.2K | 1.6K |
| 235 | Freeze-Drying | 2 | 119 | 376 | 198 |
| 235 | Hypothermia | 2 | 119 | 376 | 198 |
| 235 | Freeze Drying | 2 | 119 | 376 | 198 |
| 235 | biological monitoring | 3 | 119 | 628 | 504 |
| 242 | Antarctica | 23 | 117 | 50 | 119 |
| 243 | Neurobiology | 2 | 115 | 2.4K | 2.1K |
| 243 | DNA | 16 | 115 | 128 | 505 |
| 245 | Genetic engineering | 6 | 114 | 1.9K | 2.6K |
| 245 | Molecular cloning | 6 | 114 | 1.0K | 1.3K |
| 245 | Genetic recombination | 6 | 114 | 1.0K | 1.3K |
| 245 | Recombinant DNA | 6 | 114 | 1.2K | 1.4K |
| 249 | Conservation Biology | 6 | 113 | 832 | 1.3K |
| 250 | Pharmaceutical Chemistry | 2 | 109 | 5.5K | 4.2K |
| 251 | Continental shelf | 7 | 106 | 44 | 77 |
| 252 | Agriculture | 5 | 100 | 2.1K | 2.1K |
| 253 | Parasitic Diseases | 2 | 98 | 3.1K | 2.4K |
| 254 | Microscopy | 3 | 97 | 2.5K | 1.4K |
| 255 | Social Psychology | 2 | 94 | 2.9K | 2.1K |
| 255 | Hydrometeorology | 3 | 94 | 224 | 340 |
| 255 | Social behavior | 2 | 94 | 1.7K | 1.3K |
| 255 | Birth control | 2 | 94 | 731 | 515 |
| 259 | Agricultural Ecology | 4 | 90 | 1.3K | 1.7K |
| 260 | Petrology | 8 | 88 | 558 | 885 |
| 260 | Oxidative stress | 6 | 88 | 925 | 1.7K |
| 260 | Cell survival | 6 | 88 | 90 | 315 |
| 260 | molecular chaperones | 6 | 88 | 108 | 316 |
| 264 | Physical Geography | 4 | 87 | 544 | 476 |
| 264 | Crystal growth | 3 | 87 | 1.3K | 1.2K |
| 266 | Mineralogy | 3 | 85 | 1.6K | 1.5K |
| 266 | magnetic resonance | 3 | 85 | 708 | 468 |
| 268 | Marine Geology | 5 | 83 | 241 | 288 |
| 269 | nuclear magnetic resonance spectroscopy | 2 | 80 | 1.1K | 719 |
| 269 | NMR | 2 | 80 | 842 | 462 |
| 271 | Archaeology | 2 | 79 | 1.7K | 1.0K |
| 271 | Sites | 2 | 79 | 254 | 215 |
| 273 | Proteomics | 6 | 78 | 935 | 1.7K |
| 274 | Petroleum Geology | 3 | 77 | 305 | 323 |
| 275 | Molecular structure | 2 | 75 | 3.1K | 2.5K |
| 276 | Plant Taxonomy | 9 | 71 | 266 | 526 |
| 276 | Climate | 2 | 71 | 795 | 728 |
| 278 | Freshwater Ecology | 5 | 69 | 186 | 192 |
| 278 | Aquatic animals | 5 | 69 | 40 | 78 |
| 280 | Astrophysics | 6 | 68 | 2.6K | 3.0K |
| 280 | environmental exposure | 3 | 68 | 2.4K | 2.6K |
| 282 | Surgery | 2 | 67 | 3.4K | 3.8K |
| 282 | Medical Microbiology | 4 | 67 | 2.7K | 3.8K |
| 282 | soil microbiology | 4 | 67 | 1.3K | 2.3K |
| 285 | Origin of life | 1 | 65 | 363 | 201 |
| 285 | Tropical Medicine | 3 | 65 | 2.3K | 2.2K |
| 285 | Organelle biogenesis | 1 | 65 | 522 | 319 |
| 285 | enzymes | 3 | 65 | 1.5K | 1.8K |
| 289 | Ecological Genetics | 5 | 64 | 555 | 731 |
| 290 | toxicity testing | 1 | 60 | 1.6K | 1.0K |
| 291 | Immunology | 1 | 58 | 6.6K | 5.5K |
| 291 | Serology | 1 | 58 | 1.2K | 798 |
| 293 | Materials | 3 | 56 | 6.2K | 6.5K |
| 294 | body temperature | 4 | 55 | 227 | 380 |
| 295 | Estuaries | 1 | 54 | 349 | 343 |
| 296 | Biophysics | 3 | 52 | 7.0K | 7.2K |
| 297 | Geotechnical Engineering | 2 | 50 | 637 | 648 |
| 297 | Atmospheric Science | 9 | 50 | 47 | 111 |
| 297 | Soil Mechanics | 2 | 50 | 1.2K | 1.1K |
| 300 | Climate Change Mitigation | 3 | 49 | 39 | 207 |
| 300 | Engineering Geology | 4 | 49 | 1.2K | 1.7K |
| 300 | Global warming | 3 | 49 | 40 | 207 |
| 300 | sea level | 3 | 49 | 39 | 207 |
| 304 | Africa | 3 | 48 | 2.0K | 1.5K |
| 305 | Palynology | 3 | 46 | 296 | 348 |
| 306 | Biodegradation | 1 | 45 | 1.1K | 933 |
| 306 | Water Microbiology | 1 | 45 | 1.2K | 911 |
| 306 | Fouling | 1 | 45 | 616 | 558 |
| 309 | Metals | 1 | 42 | 3.3K | 2.2K |
| 310 | Genetic variation | 4 | 41 | 90 | 161 |
| 310 | Environmental risk assessment | 3 | 41 | 470 | 665 |
| 310 | North America | 1 | 41 | 1.5K | 961 |
| 313 | Wildlife conservation | 1 | 40 | 1.7K | 1.5K |
| 313 | nuclear magnetic resonance | 6 | 40 | 888 | 1.4K |
| 315 | actuators | 2 | 38 | 1.8K | 2.2K |
| 315 | transducers | 2 | 38 | 1.8K | 2.2K |
| 317 | Information Technology | 1 | 37 | 4.8K | 3.1K |
| 317 | Rock deformation | 2 | 37 | 55 | 99 |
| 317 | Scandinavia | 7 | 37 | 435 | 1.0K |
| 320 | Nutrition | 1 | 36 | 8.2K | 7.2K |
| 320 | Diet | 1 | 36 | 4.4K | 4.5K |
| 322 | Environmental Geology | 4 | 35 | 1.3K | 2.2K |
| 322 | Coral reef biology | 3 | 35 | 165 | 341 |
| 322 | Obesity | 1 | 35 | 4.0K | 4.0K |
| 325 | Micropaleontology | 2 | 33 | 143 | 145 |
| 326 | symbiosis | 2 | 32 | 205 | 268 |
| 327 | Biomechanics | 1 | 30 | 2.9K | 2.4K |
| 327 | radiative transfer | 1 | 30 | 492 | 371 |
| 327 | Bioinorganic chemistry | 2 | 30 | 1.9K | 2.3K |
| 330 | shellfish | 5 | 29 | 92 | 253 |
| 331 | Information Systems | 1 | 28 | 2.9K | 2.5K |
| 331 | Environmental Law | 2 | 28 | 1.4K | 2.5K |
| 331 | Restoration Ecology | 2 | 28 | 681 | 959 |
| 331 | Latin America | 2 | 28 | 2.1K | 1.3K |
| 331 | Documentation | 1 | 28 | 755 | 588 |
| 336 | Statistics | 2 | 26 | 3.8K | 3.6K |
| 336 | Risk Management | 2 | 26 | 1.1K | 1.5K |
| 336 | Virology | 1 | 26 | 5.7K | 6.1K |
| 336 | Flood forecasting | 2 | 26 | 151 | 298 |
| 336 | Flood control | 2 | 26 | 399 | 514 |
| 336 | Middle East | 1 | 26 | 1.9K | 813 |
| 342 | Seismology | 5 | 25 | 490 | 887 |
| 343 | Soviet Union | 2 | 24 | 1.2K | 909 |
| 344 | Ocean-atmosphere interaction | 7 | 23 | 58 | 109 |
| 344 | Plant breeding | 1 | 23 | 1.9K | 1.9K |
| 344 | sex differences | 1 | 23 | 373 | 432 |
| 347 | Neurochemistry | 1 | 22 | 4.0K | 4.4K |
| 347 | isomerism | 1 | 22 | 813 | 763 |
| 347 | Chirality | 1 | 22 | 813 | 763 |
| 350 | Ornithology | 4 | 21 | 1.1K | 1.6K |
| 351 | Maps | 2 | 20 | 248 | 335 |
| 352 | Wind power | 1 | 19 | 609 | 598 |
| 353 | landscapes | 2 | 18 | 262 | 441 |
| 353 | human behavior | 2 | 18 | 3.2K | 5.0K |
| 353 | Asia | 1 | 18 | 5.2K | 4.3K |
| 353 | Birds | 4 | 18 | 1.3K | 2.0K |
| 353 | Forest genetics | 2 | 18 | 521 | 712 |
| 358 | Chemical Engineering | 1 | 17 | 6.2K | 6.4K |
| 358 | Educational Psychology | 1 | 17 | 2.3K | 2.4K |
| 358 | Chemical analysis | 3 | 17 | 1.6K | 2.8K |
| 358 | biological factors | 1 | 17 | 3.9K | 4.2K |
| 358 | Water chemistry | 1 | 17 | 944 | 976 |
| 358 | Minerals | 1 | 17 | 1.6K | 1.7K |
| 364 | Plant Genetics | 2 | 16 | 1.0K | 1.8K |
| 364 | Plant genetic engineering | 2 | 16 | 1.4K | 2.3K |
| 364 | plant molecular biology | 2 | 16 | 2.1K | 3.4K |
| 367 | Computational Chemistry | 1 | 15 | 1.4K | 1.6K |
| 367 | Morphology | 2 | 15 | 1.3K | 1.6K |
| 367 | Food | 1 | 15 | 5.5K | 6.2K |
| 370 | Food additives | 1 | 14 | 1.9K | 2.4K |
| 370 | food contamination | 1 | 14 | 2.2K | 2.4K |
| 370 | environmental control | 2 | 14 | 368 | 713 |
| 373 | Geographic information systems | 3 | 13 | 1.3K | 2.2K |
| 373 | Bioacoustics | 2 | 13 | 139 | 273 |
| 373 | Photobiology | 1 | 13 | 2.0K | 2.5K |
| 376 | Ecohydrology | 2 | 12 | 501 | 940 |
| 376 | Quantum Optics | 1 | 12 | 1.6K | 1.7K |
| 376 | livestock | 2 | 12 | 873 | 1.1K |
| 376 | Atomic spectroscopy | 1 | 12 | 1.7K | 1.8K |
| 376 | Laser Spectroscopy | 1 | 12 | 1.5K | 1.6K |
| 376 | drug evaluation | 2 | 12 | 2.1K | 3.6K |
| 382 | Fluid Dynamics | 2 | 11 | 1.4K | 2.0K |
| 383 | Chemical Ecology | 2 | 10 | 814 | 1.6K |
| 383 | Greenhouse gases | 1 | 10 | 457 | 736 |
| 383 | Fire ecology | 3 | 10 | 71 | 207 |
| 383 | pheromones | 2 | 10 | 751 | 1.5K |
| 383 | Landslides | 2 | 10 | 367 | 830 |
| 383 | drug toxicity | 1 | 10 | 906 | 1.4K |
| 383 | Genes | 2 | 10 | 1.9K | 3.1K |
| 390 | Neurology | 1 | 8 | 8.9K | 10.1K |
| 390 | Acoustics | 1 | 8 | 746 | 632 |
| 390 | Marine Biotechnology | 1 | 8 | 560 | 950 |
| 390 | Radiation Protection | 1 | 8 | 1.5K | 1.5K |
| 390 | Developmental Neurobiology | 1 | 8 | 1.3K | 1.7K |
| 390 | biological agents | 3 | 8 | 803 | 1.2K |
| 396 | Mechanical Engineering | 2 | 6 | 3.3K | 4.4K |
| 396 | Liquid Crystals | 1 | 6 | 1.7K | 1.8K |
| 396 | Marine mineral resources | 2 | 6 | 207 | 496 |
| 396 | Soft Condensed Matter | 1 | 6 | 2.0K | 2.6K |
| 396 | Visual Perception | 2 | 6 | 562 | 1.0K |
| 396 | Seabed | 2 | 6 | 207 | 496 |
| 396 | South America | 1 | 6 | 255 | 221 |
| 396 | California | 2 | 6 | 662 | 1.2K |
| 404 | Natural Sciences | 1 | 5 | 291 | 444 |
| 404 | Condensed Matter | 1 | 5 | 5.0K | 5.8K |
| 404 | Spain | 3 | 5 | 808 | 1.2K |
| 407 | Public Health | 1 | 4 | 11.1K | 13.2K |
| 407 | Health Policy | 1 | 4 | 5.0K | 6.7K |
| 407 | preventive medicine | 1 | 4 | 2.7K | 3.9K |
| 407 | Crystallography | 2 | 4 | 2.5K | 3.3K |
| 407 | Microwaves | 2 | 4 | 2.0K | 3.0K |
| 412 | Planetary Science | 1 | 3 | 948 | 1.3K |
| 412 | Surface Chemistry | 1 | 3 | 5.1K | 6.7K |
| 412 | Economic History | 4 | 3 | 3.6K | 6.5K |
| 412 | Human Geography | 4 | 3 | 996 | 2.6K |
| 412 | Crystallization | 1 | 3 | 1.1K | 1.5K |
| 412 | Thin Films | 1 | 3 | 1.3K | 1.9K |
| 412 | X-ray crystallography | 1 | 3 | 1.2K | 1.6K |
| 412 | Classification | 1 | 3 | 887 | 1.3K |
| 412 | Developing countries | 1 | 3 | 3.8K | 5.4K |
| 412 | Plants | 1 | 3 | 3.9K | 5.1K |
| 422 | Photography | 3 | 2 | 1.9K | 3.0K |
| 422 | Hydraulic Engineering | 2 | 2 | 1.2K | 2.3K |
| 424 | Coastal Engineering | 1 | 1 | 330 | 600 |
| 424 | Plant Morphology | 1 | 1 | 983 | 1.6K |
| 424 | Digital electronics | 1 | 1 | 486 | 837 |
| 424 | Combinatorial optimization | 1 | 1 | 1.0K | 1.5K |
| 424 | Treaties | 2 | 1 | 87 | 157 |
| 424 | Muslims | 1 | 1 | 202 | 220 |
| 430 | History | 1 | 0 | 2.1K | 2.3K |
| 430 | Cybernetics | 2 | 0 | 2.2K | 4.4K |
| 430 | Nuclear Physics | 1 | 0 | 5.8K | 7.2K |
| 430 | Solid State Physics | 1 | 0 | 5.5K | 7.2K |
| 430 | Biomass Energy | 2 | 0 | 2.9K | 5.2K |
| 430 | Environmental Economics | 1 | 0 | 886 | 1.6K |
| 430 | Political Ecology | 1 | 0 | 186 | 377 |
| 430 | Aerosols | 1 | 0 | 789 | 1.4K |
| 430 | Wetland conservation | 2 | 0 | 516 | 1.5K |
| 430 | Germany | 7 | 0 | 416 | 2.3K |
| 430 | explosives | 2 | 0 | 371 | 876 |
| 430 | Mountains | 1 | 0 | 934 | 1.5K |
| 430 | aerosol | 1 | 0 | 237 | 549 |
| 430 | Wetlands | 2 | 0 | 530 | 1.5K |