| 173 | Research Article |
| 91 | Computer Science |
| 64 | Information Systems Applications (incl.Internet) |
| 62 | Library & information science |
| 57 | Artificial Intelligence (incl. Robotics) |
| 51 | Ecology |
| 45 | Computer Communication Networks |
| 44 | Information Storage and Retrieval |
| 40 | Information behaviour & retrieval |
| 40 | Information & knowledge management |
| 38 | HYDROLOGY |
| 37 | Data Mining and Knowledge Discovery |
| 36 | Environmental Management |
| 36 | Atmospheric Protection/Air Quality Control/Air Pollution |
| 34 | Database Management |
| 25 | Multimedia Information Systems |
| 24 | Plant Sciences |
| 24 | Internet |
| 24 | Information & communications technology |
| 24 | Forestry Management |
| 23 | Librarianship/library management |
| 23 | BIOGEOSCIENCES |
| 22 | Regular Article |
| 21 | NATURAL HAZARDS |
| 19 | User Interfaces and Human Computer Interaction |
| 19 | Information management & governance |
| 19 | Forestry |
| 18 | OCEANOGRAPHY: BIOLOGICAL AND CHEMICAL |
| 18 | Information management |
| 18 | GLOBAL CHANGE |
| 17 | Software Engineering |
| 17 | Algorithm Analysis and Problem Complexity |
| 16 | Waste Water Technology / Water Pollution Control / Water Management / Aquatic Pollution |
| 16 | Plant Ecology |
| 16 | Library technology |
| 16 | Library & information services |
| 16 | ATMOSPHERIC COMPOSITION AND STRUCTURE |
| 15 | Landscape Ecology |
| 15 | Collection building & management |
| 15 | Article |
| 14 | Hydrogeology |
| 13 | Monitoring/Environmental Analysis/Environmental Ecotoxicology |
| 13 | Evolutionary Biology |
| 12 | PALEOCEANOGRAPHY |
| 12 | Mathematical Logic and Formal Languages |
| 12 | Document Preparation and Text Processing |
| 11 | Records management & preservation |
| 11 | Public policy & environmental management |
| 11 | Nature Conservation |
| 11 | Logics and Meanings of Programs |
| 10 | Pattern Recognition |
| 10 | POLICY SCIENCES |
| 10 | Information literacy |
| 10 | Document management |
| 10 | ATMOSPHERIC PROCESSES |
| 9 | Regional planning |
| 9 | Original Article |
| 9 | CRYOSPHERE |
| 8 | Watershed |
| 8 | Information Systems and Communication Service |
| 8 | INFORMATICS |
| 8 | Environmental Toxicology |
| 8 | Biosphere/atmosphere interactions |
| 7 | Water management |
| 7 | OCEANOGRAPHY: GENERAL |
| 7 | Modeling |
| 7 | Ethics |
| 7 | Environmental management |
| 7 | Biogeochemistry |
| 7 | Biogeochemical kinetics and reaction modeling |
| 7 | Biogeochemical cycles, processes, and modeling |
| 7 | Agricultural Economics |
| 6 | Veterinary Medicine |
| 6 | Surface water quality |
| 6 | Streamflow |
| 6 | Sociology |
| 6 | Simulation and Modeling |
| 6 | Scholarly communications/publishing |
| 6 | Review |
| 6 | Primary Research Article |
| 6 | Metadata |
| 6 | History |
| 6 | General or miscellaneous |
| 6 | Environmental issues |
| 6 | Environmental health |
| 6 | Economics |
| 6 | Computers and Society |
| 6 | Computer Appl. in Administrative Data Processing |
| 6 | Computation by Abstract Devices |
| 6 | Classification & cataloguing |
| 5 | Troposphere: composition and chemistry |
| 5 | Soil Science & Conservation |
| 5 | Public Health/Gesundheitswesen |
| 5 | Pollution: urban and regional |
| 5 | Plant Physiology |
| 5 | Methodology of the Social Sciences |
| 5 | Meteorology/Climatology |
| 5 | Management of Computing and Information Systems |
| 5 | Management and Conservation |
| 5 | Library strategy |
| 5 | Library promotion |
| 5 | Hydrology: Geographic Information Systems (GIS) |
| 5 | Human impacts |
| 5 | Human impact |
| 5 | HR in libraries |
| 5 | GEOGRAPHIC LOCATION |
| 5 | Climate impact |
| 5 | Climate and Dynamics |
| 5 | Atmosphere |
| 5 | Agriculture |
| 4 | Waste Management/Waste Technology |
| 4 | Stock revision |
| 4 | Special Purpose and Application-Based Systems |
| 4 | Special Issue Paper |
| 4 | Soil moisture |
| 4 | Remote sensing |
| 4 | Remote sensing and disasters |
| 4 | Remote Sensing/Photogrammetry |
| 4 | Pollution: urban, regional and global |
| 4 | Physical modeling |
| 4 | Original Research |
| 4 | ORIGINAL ARTICLE |
| 4 | Microeconomics |
| 4 | Marine pollution |
| 4 | Life Sciences |
| 4 | Lending |
| 4 | Language Translation and Linguistics |
| 4 | Instruments and techniques: modeling |
| 4 | Information systems |
| 4 | Information Systems Applications (incl. Internet) |
| 4 | Image Processing and Computer Vision |
| 4 | Hydrobiology |
| 4 | Hazard/Risk Assessment |
| 4 | Geography (general) |
| 4 | Geochemical cycles |
| 4 | GEODESY AND GRAVITY |
| 4 | GEOCHEMISTRY |
| 4 | Food & nutrition |
| 4 | Fifty Years of Research and Data Collection: U.S. Department of Agriculture Walnut Gulch Experimental Watershed |
| 4 | Environment, general |
| 4 | Earth Sciences |
| 4 | Earth Sciences, general |
| 4 | Document delivery |
| 4 | Databases |
| 4 | Consortia |
| 4 | Business Information Systems |
| 4 | Bibliometrics |
| 4 | Agricultural/environmental economics |
| 4 | Aerosols and particles |
| 3 | Water budgets |
| 3 | Troposphere: constituent transport and chemistry |
| 3 | Tree Biology |
| 3 | Theory of Computation |
| 3 | Technical Paper |
| 3 | Special Issue Article |
| 3 | Software Engineering/Programming and Operating Systems |
| 3 | Sedimentation |
| 3 | Review Article |
| 3 | Quality of Life Research |
| 3 | Programming Techniques |
| 3 | Precipitation |
| 3 | Plant Pathology |
| 3 | OCEANOGRAPHY: PHYSICAL |
| 3 | Monitoring networks |
| 3 | Models and Principles |
| 3 | Modeling and Analysis |
| 3 | Megacities and urban environment |
| 3 | Management science & operations |
| 3 | Library Science |
| 3 | Irrigation |
| 3 | Interdisciplinary Studies |
| 3 | Groundwater hydrology |
| 3 | Full Length Original Research Paper |
| 3 | Erosion |
| 3 | Environmental Chemistry |
| 3 | Data Storage Representation |
| 3 | Computer-Aided Engineering (CAD, CAE) and Design |
| 3 | Computer Systems Organization and Communication Networks |
| 3 | Computer Graphics |
| 3 | Climatology |
| 3 | Climate impacts |
| 3 | Aerosols |
| 3 | Accounting & finance |
| 2 | thesauri |
| 2 | subject indexing |
| 2 | selection |
| 2 | controlled vocabularies |
| 2 | Water supply |
| 2 | Systems and Data Security |
| 2 | Surface Water and Climate |
| 2 | Strategy |
| 2 | Researcher services |
| 2 | Research |
| 2 | Reference services/information literacy |
| 2 | RESEARCH REPORT |
| 2 | RESEARCH ARTICLE |
| 2 | Property management & built environment |
| 2 | Numeric Computing |
| 2 | Mass balance |
| 2 | Marketing |
| 2 | MATHEMATICAL GEOPHYSICS |
| 2 | MARINE GEOLOGY AND GEOPHYSICS |
| 2 | Library instruction |
| 2 | Land/atmosphere interactions |
| 2 | Land cover change |
| 2 | Knowledge management |
| 2 | Knowledge management systems |
| 2 | Invited Commentary |
| 2 | Instruments and techniques: monitoring |
| 2 | Institutions |
| 2 | Information user studies |
| 2 | Industry Note |
| 2 | Impacts of global change |
| 2 | Hydrometeorology |
| 2 | Hydrology |
| 2 | Hydrology and Land Surface Studies |
| 2 | Hydrological cycles and budgets |
| 2 | Hydroclimatology |
| 2 | Groundwater/surface water interaction |
| 2 | Global change from geodesy |
| 2 | Geotechnical Engineering |
| 2 | Geochemistry |
| 2 | Freshwater & Marine Ecology |
| 2 | Evolution of the atmosphere |
| 2 | Evapotranspiration |
| 2 | Environmental Economics |
| 2 | Environment |
| 2 | Engineering |
| 2 | Ecosystems, structure, dynamics, and modeling |
| 2 | Ecosystems, structure and dynamics |
| 2 | Economics general |
| 2 | Economic Policy |
| 2 | Discrete Mathematics in Computer Science |
| 2 | Data Structures |
| 2 | Corporate social responsibility |
| 2 | Contributed Paper |
| 2 | Constituent sources and sinks |
| 2 | Computer Science, general |
| 2 | Computer Applications in Earth Sciences |
| 2 | Composition and Chemistry |
| 2 | Climate dynamics |
| 2 | Climate Change |
| 2 | Climate Change Effects on Groundwater Resources |
| 2 | Civil Engineering |
| 2 | Catchment |
| 2 | Business/Management Science, general |
| 2 | Business ethics |
| 2 | Building & construction |
| 2 | Broader Perspectives |
| 2 | Benefit‐cost analysis |
| 2 | Anthropology/Archaeometry |
| 2 | Anoxic environments |
| 2 | Agricultural systems |
| 2 | Aerosol and Clouds |
| 1 | weighting |
| 1 | user models |
| 1 | user aids |
| 1 | subject heading lists |
| 1 | standards |
| 1 | similarity |
| 1 | semantic analysis |
| 1 | prototyping |
| 1 | phrases |
| 1 | metadata |
| 1 | mental processes |
| 1 | machine learning |
| 1 | knowledge organization systems |
| 1 | information use |
| 1 | information storage and retrieval systems |
| 1 | index terms |
| 1 | hierarchical models |
| 1 | errors |
| 1 | epistemology |
| 1 | document retrieval |
| 1 | decision making |
| 1 | databases |
| 1 | content analysis |
| 1 | concepts |
| 1 | automatic indexing |
| 1 | automatic classification |
| 1 | automatic categorization |
| 1 | analytic models |
| 1 | Work study/scientific management |
| 1 | Water cycles |
| 1 | Water Quality |
| 1 | Water Policy |
| 1 | Water Policy, Economics, and System Analysis |
| 1 | Vadose zone |
| 1 | Urban Pesticides Risk Assessment and Management |
| 1 | Topics in Research and Innovation |
| 1 | Time series experiments |
| 1 | Time series analysis |
| 1 | Theory of Medicine/Bioethics |
| 1 | The International Global Atmospheric Chemistry (IGAC) Project |
| 1 | Text Mining |
| 1 | Terrestrial Pollution |
| 1 | Technology management/strategy |
| 1 | Technology & learning |
| 1 | Systems and Information Theory in Engineering |
| 1 | Systems Theory, Control |
| 1 | Sulfur cycling |
| 1 | Structure Discovery and Clustering |
| 1 | Stochastic hydrology |
| 1 | Stable isotopes |
| 1 | Stable isotope geochemistry |
| 1 | Special Series |
| 1 | Special Section: Scale Problems in Hydrology |
| 1 | Special Section: Reynolds Creek Experimental Watershed |
| 1 | Special Section: Monsoon '90 Multidisciplinary Experiment |
| 1 | Spatial modeling |
| 1 | Spatial analysis |
| 1 | Spatial analysis and representation |
| 1 | Soils |
| 1 | Soils/pedology |
| 1 | Social economics |
| 1 | Social Sciences |
| 1 | Snow and ice |
| 1 | Signal, Image and Speech Processing |
| 1 | Short Communication |
| 1 | Sediment transport |
| 1 | Scientific Briefing |
| 1 | Scaling: spatial and temporal |
| 1 | Scale Problems in Hydrology |
| 1 | SHORT COMMUNICATION |
| 1 | Robotics and Automation |
| 1 | Risk Reduction |
| 1 | Reynolds Creek Experimental Watershed |
| 1 | Research article |
| 1 | Research Reports and Commentaries |
| 1 | Research Report |
| 1 | Research Paper |
| 1 | Research Paper/ |
| 1 | Regional Science |
| 1 | Real estate & property |
| 1 | Public Issues |
| 1 | Public Issues: Science policy |
| 1 | Project evaluation |
| 1 | Programming Languages, Compilers, Interpreters |
| 1 | Probability and Statistics in Computer Science |
| 1 | Population Economics |
| 1 | Policy Sciences |
| 1 | Policy Sciences: Demand estimation |
| 1 | Policy Sciences: Benefit‐cost analysis |
| 1 | Plant Systematics/Taxonomy/Biogeography |
| 1 | Plant Anatomy/Development |
| 1 | Pesticide Root Zone Model |
| 1 | Perspective |
| 1 | Papers on Climate and Atmospheric Physics |
| 1 | PUBLIC ISSUES |
| 1 | Overview |
| 1 | Original Paper |
| 1 | Organization/Planning |
| 1 | Optimization |
| 1 | Opinion |
| 1 | Operations/process management |
| 1 | Operations Research/Decision Theory |
| 1 | Online learning/e-learning |
| 1 | Oceans |
| 1 | Oceanography |
| 1 | Ocean/Earth/atmosphere/hydrosphere/cryosphere interactions |
| 1 | Nutrients and nutrient cycling |
| 1 | Notices and announcements |
| 1 | North America |
| 1 | Nitrogen cycling |
| 1 | New Technologies |
| 1 | NONLINEAR GEOPHYSICS |
| 1 | Monsoon '90 Multidisciplinary Experiment |
| 1 | Monitoring, forecasting, prediction |
| 1 | Microbiology |
| 1 | Meteorology and Atmospheric Dynamics: Turbulence |
| 1 | Meteorology and Atmospheric Dynamics: Land/atmosphere interactions |
| 1 | Meteorology and Atmospheric Dynamics: General or miscellaneous |
| 1 | Meteorology and Atmospheric Dynamics: Boundary layer processes |
| 1 | Mathematical/quantitative economics |
| 1 | Marketing strategy/methods |
| 1 | Marine organic chemistry |
| 1 | Management science/operations research |
| 1 | Library finances |
| 1 | Legislation and regulations |
| 1 | Legal Aspects of Computing |
| 1 | Knowledge Representation |
| 1 | Isotopic composition and chemistry |
| 1 | International marketing |
| 1 | Instruments, sensors, and techniques |
| 1 | Information repositories |
| 1 | Information Related to Geographic Region: North America |
| 1 | Information Related to Geographic Region: General or miscellaneous |
| 1 | Information Related to Geographic Region: Arctic region |
| 1 | Infiltration |
| 1 | Industrial and Production Engineering |
| 1 | Impacts of Land Use Change on Water Resources |
| 1 | Hypoxic environments |
| 1 | Hydrology: Surface water quality |
| 1 | Hydrology: Reservoirs (surface) |
| 1 | Hydrology: Human impacts |
| 1 | Hydrological |
| 1 | Hydrogeochemistry |
| 1 | Human Genetics |
| 1 | Health Informatics |
| 1 | Health & Ecological Risk Assessment |
| 1 | Habitat Relations |
| 1 | Guest Editorial |
| 1 | Groundwater quality |
| 1 | Gravity and isostasy |
| 1 | Geosciences |
| 1 | Geosciences, general |
| 1 | Geophysics/Geodesy |
| 1 | Geology |
| 1 | General circulation |
| 1 | GENERAL OR MISCELLANEOUS |
| 1 | Financial risk/company failure |
| 1 | Financial management/structure |
| 1 | Europe |
| 1 | Estimation and forecasting |
| 1 | Erratum |
| 1 | Environmental Biotechnology |
| 1 | Electronics and Microelectronics, Instrumentation |
| 1 | Electronic and Computer Engineering |
| 1 | Electronic Commerce/e-business |
| 1 | Education |
| 1 | Eco‐hydrology |
| 1 | Drought |
| 1 | Distance learning |
| 1 | Diagnosis of Stressors and Effects |
| 1 | Decadal ocean variability |
| 1 | Data sets |
| 1 | Corals |
| 1 | Coral reef systems |
| 1 | Control |
| 1 | Control Engineering |
| 1 | Contaminants |
| 1 | Contaminant and organic biogeochemistry |
| 1 | Computers and Education |
| 1 | Computer Imaging, Vision, Pattern Recognition and Graphics |
| 1 | Computer Appl. in Social and Behavioral Sciences |
| 1 | Computer Appl. in Arts and Humanities |
| 1 | Computational methods and data processing |
| 1 | Computational Mathematics and Numerical Analysis |
| 1 | Computational Geophysics |
| 1 | Computational Biology/Bioinformatics |
| 1 | Combinatorics |
| 1 | Coastal Sciences |
| 1 | Cloud physics and chemistry |
| 1 | Climate variability |
| 1 | Climate change and variability |
| 1 | Climate and interannual variability |
| 1 | Circuits and Systems |
| 1 | Chemistry/Food Science, general |
| 1 | Carbon, Water, and Energy Cycle Investigations Using a Common Global Data Set: The International Land Surface Climatology Project (ISLSCP) Initiative II |
| 1 | Carbon cycling |
| 1 | Campus systems |
| 1 | Calculus of Variations and Optimal Control |
| 1 | Calculus of Variations and Optimal Control; Optimization |
| 1 | COMPUTATIONAL GEOPHYSICS |
| 1 | Biosignatures and proxies |
| 1 | Biometrics |
| 1 | Bioinformatics |
| 1 | Biochemistry, general |
| 1 | Automotive Engineering |
| 1 | Atmospheric |
| 1 | Asia |
| 1 | Appilcation |
| 1 | Anthropology |
| 1 | Anthropogenic effects |
| 1 | Anoxic and hypoxic environments |
| 1 | Annual Review |
| 1 | Animal Anatomy / Morphology / Histology |
| 1 | Aerosols and Clouds |
| 1 | Accounting/accountancy |
| 1 | APPLIED ISSUES |
| 1 | ANNALS OF THE NEW YORK ACADEMY OF SCIENCES |
| 1 | 6305 |
