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Variables can be listed alphabetically by name or by number of T.Sites by clicking on the appropriate arrows found beside each heading. View the variable documentation by clicking on the name. Click on the number to list the T.Sites measuring each variable. Click here to download the entire list as a zip file (440 KB).
68 Variables found measured by T.Sites member of network [NADP National Trend Network]
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Global change map
Aerosols    2  
Air relative humidity  x 4  
Air temperature  x 4  
Biomass above ground    1    
Biomass below ground    1    
Burned area    1  
Carbon dioxide flux    1    
Dry deposition of nitrate and sulfate    1  
Evapotranspiration    2  
Fertilizer use    1  
Forest cover change    1    
Habitat conversion    1    
Invasive species    1    
Land cover  x 1    
Leaf area index  x 2  
Necromass    1  
Necromass decomposition rate    1  
Net ecosystem productivity    1    
Net primary productivity    1    
Ozone  x 1    
Phenology    1    
Plant N and P tissue content    2  
Precipitation  x 3  
Radiation: Fraction photosynthetically active radiation absorbed by plant canopy  x 1  
Radiation: Incoming surface solar radiation  x 3  
Rainfall chemistry  x 1    
Snow cover area  x 1    
Snow depth  x 2  
Snow water equivalent  x 1    
Soil annual loss from erosion    1    
Soil available phosphorus    2  
Soil bulk density    2  
Soil cation exchange capacity    2  
Soil depth    3  
Soil exchangeable acidity    2  
Soil exchangeable potassium    2  
Soil macrofauna    1    
Soil microfauna    1    
Soil microflora    1    
Soil moisture  x 3    
Soil moisture storage capacity  x 1  
Soil organic carbon    2  
Soil pH    2  
Soil respiration    2  
Soil surface characteristics    1  
Soil temperature    3  
Soil texture    3  
Soil total carbon    2  
Soil total nitrogen    2  
Soil total phosphorous    1  
Soil type  x 2  
Species richness    1    
Spectral vegetation greenness indices  x 1  
Threatened species    1    
Topography    1  
Vegetation cover and height class  x 1    
Vegetation structure  x 1  
Water anion concentration    1  
Water cation concentration    1  
Water discharge (Surface)    2    
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