CO2Flux
There was different tendency of CO2flux rate at four slope positions between the initial and last part of the 47 day measurement period (Fig.2a). We use piecewise liner regression of the CO2flux and soil temperature to parse the data into two measurement sub-periods. The 28th day was determined to be the turning point. For the initial 27 days, position, time, and interaction of position and time significantly affected CO2flux (p