The spatial and temporal impact of land-surface and atmospheric variables can be determined from long-term, in-situ measurements given a dense enough observational network. The Oklahoma Mesonet and Oklahoma Atmospheric Surface-layer Instrumentation System (OASIS) networks measure a suite of meteorological and surface components across all of Oklahoma with an average spacing of 30 km between sites. Data are collected in real-time every 30-minutes at 89 sites across the state. This study examines the spatial and temporal relationships among all near-surface and soil data collected during the year 2000.
The results of this study quantified the arial influence of in-situ measurements of air temperature, relative humidity, wind speed, skin temperature, solar radiation, net radiation, sensible heat flux, ground heat flux, and soil moisture at 5 cm, 25 cm, 60 cm, and 75 cm depths. In general, the radius of influence (RI; defined as R > 0.6) of atmospheric parameters extended to > 100 km, while the RI of flux and soil parameters was restricted to < 50 km. Autocorrelations of surface fluxes and some atmospheric parameters were limited to several days while some soil and atmospheric parameters retained a much longer autocorrelation.