ChEAS (Chequamegon Ecosystem-Atmosphere Study) is a cooperative of researchers studying carbon, water, and energy exchanges between the land surface and the atmosphere in northern Wisconsin forests, wetlands, and lakes. Here at UW, ChEAS investigators operate four DOE-funded Ameriflux core site eddy covariance flux towers including the 447 m WLEF Park Falls, WI very tall tower site. These sites continuously measure hourly atmospheric turbulent fluxes of carbon dioxide, methane, water, energy, and momentum and related micrometeorological, radiative, and soil physical variables since the late 1990s or early 2000s. The very tall tower site is also a NOAA tall tower greenhouse gas observatory with high-accuracy profiles of CO2, CO, and CH4, a TCCON solar-pointing FTIR site for column greenhouse gas measurement (GOSAT/OCO-2 validation site), and a COSMOS neutron scattering soil moisture observing site (NASA SMAP validation site).
Dept of Atmospheric and Oceanic Sciences
University of Wisconsin-Madison
1225 W Dayton St, AOSS 1549
Madison, WI 53706
Fax: 608-262-0166 (AOS Office)