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NEON Sampling Boundaries
Tower Airshed Boundary
This map depicts the spatial layout of this field site. Please note that some locations may have moved over time due to logistics, safety and science requirements.
This map was updated on January 11, 2019
Construction Status for this Site
The LBJ Grasslands is 16,800 acres of land managed by the US Forest Service under the US Department of Agriculture. Learn more about NEON Collection Methods here.
The site lies in a temperate humid subtropical climate (Köppen: Cfa), with frequent variations in weather daily and seasonally, except during the consistently hot and humid summer months. The average annual precipitation is 36.8 inches with an average summer high temperature of 94°F and average winter low temperature of 27°F.
There is a rich legacy of land use, ranging back to the mid-19th century. Currently, LBJ Grasslands are used for recreation and hunting, livestock grazing, and fossil fuel extraction. Ongoing ecological monitoring is performed at the site, along with prescribed burning.
Total data products planned for this site: 115
Site Host & Access Site Host:
U. S. Forest Service
Is additional non-NEON research allowed at this site?:
No additional research is allowed in this area at this time. The site hosts have only permitted NEON research activities and are not open to additional research.
Site Characteristics Latitude/Longitude:33.40123, -97.57 Elevation:259 m Mean Annual Temperature:18C/64.4F Mean Annual Precipitation:840 mm Dominant NLCD Classes:
Site Specific Topics
NEON collects the standard suite of data at CLBJ, flux tower measurements and organismal data; however, data from this particular location supports greater understanding of land use change, climate change (particularly its role in multidecadal ENSO variability), and infectious disease and invasive species.
LBJ Grasslands is a cross timbers ecosystem, which is a mosaic of grass dominated prairies and oak dominated forests. The dominant tree species are Quercus stellata and Q. marilandica. Important grass species include Andropogon scoparius, A. gerardii, Sorghastrum nutans, and Panicum virgatum.
Important wildlife species include pronghorn (Antilocapra americana), black-tailed prairie dogs (Cynomys ludovicianus), horned larks (Eremophila alpestris), and mountain plovers (Charadrius montanus).
The dominant soil type is clay-rich Alfisols.
Antlers Sand Unit, sand, mud, and clay. Early Cretaceous.
USGS HUC: h12030104
Mean Canopy Height:
The mean canopy height is 13'.
The dominant wind direction is south.
Data Collection Types
Airborne Remote Sensing Surveys
Remote sensing surveys of this field site collect lidar, spectrometer and high-resolution RGB camera data.
The flux/meteorological tower at this site is 72’ with 5 measurement levels. The tower top extends above the vegetation canopy to allow sensors mounted at the top and along the tower to capture the full profile of atmospheric conditions from the top of the vegetation canopy to the ground. The tower collects physical and chemical properties of atmosphere-related processes, such as humidity, wind, and net ecosystem gas exchange. Precipitation data are collected by a Double Fence Intercomparison Reference (DFIR) near the tower and a series of throughfalls located in the soil array.
This site has one phenocam on the top of the flux tower and one near the bottom of the tower.
Soil Sensor Measurements
This site has five soil plots placed in an array within the airshed of the flux tower. The following measurements may be collected at the soil surface in each soil plot:
Photosynthetically Active Radiation (PAR) at soil surface
Soil heat flux
The following measurements are collected at multiple depths in each soil plot:
Field ecologists collect the following types of observational data at this site:
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Field Operations Office
1200 South Woodrow, Suite 100
Denton, TX 76205