Sensors, Vol. 20, Pages 5268: Intercomparison of In Situ Sensors for Ground-Based Land Surface Temperature Measurements

Sensors, Vol. 20, Pages 5268: Intercomparison of In Situ Sensors for Ground-Based Land Surface Temperature Measurements Sensors doi: 10.3390/s20185268 Authors: Krishnan Meyers Hook Heuer Senn Dumas Land surface temperature (LST) is a key variable in the determination of land surface energy exchange processes from local to global scales. Accurate ground measurements of LST are necessary for a number of applications including validation of satellite LST products or improvement of both climate and numerical weather prediction models. With the objective of assessing the quality of in situ measurements of LST and to evaluate the quantitative uncertainties in the ground-based LST measurements, intensive field experiments were conducted at NOAA’s Air Resources Laboratory (ARL)’s Atmospheric Turbulence and Diffusion Division (ATDD) in Oak Ridge, Tennessee, USA, from October 2015 to January 2016. The results of the comparison of LSTs retrieved by three narrow angle broadband infrared temperature sensors (IRT), hemispherical longwave radiation (LWR) measurements by pyrgeometers, forward looking infrared camera with direct LSTs by multiple thermocouples (TC), and near surface air temperature (AT) are presented here. The brightness temperature (BT) measurements by the IRTs agreed well with a bias of <0.23 °C, and root mean square error (RMSE) of <0.36 °C. The daytime LST(TC) and LST(IRT) sho...
Source: Sensors - Category: Biotechnology Authors: Tags: Article Source Type: research