Gridded influence functions for NOAA tall towers for January 2010

The data provides influence functions, also called tower concentration footprints, for nine towers in the NOAA Greenhouse Gas tall tower reference network. The influence functions are five dimensional arrays: the first two correspond to the mole fraction observations, the third to the time before the observation, and the last two to the spatial extent of the fluxes. Coordinates and transform parameters are provided to express the spatial locations of the fluxes in latitude and longitude and to convert the third axis to an absolute flux time. The driving meteorology for this run is taken from Lauvaux and Butler (2016), with description in Butler et al. (2019). Intended use: Multiply the influence functions by fluxes in mol/m2/s, making sure to line up the flux times and spatial extents correctly, then sum. This will give a two-dimensional array of simulated observations by time and location.