Investigating Dynamics Greenhouse Gas from GOSAT in Tropical Peatland, Central Kalimantan (A Comparision of Empirical Estimation and GOSAT Satellite)

Spatial dynamics of Greenhouse gases, CO2 will be investigated by comparing the carbon flux estimation using empirical models with satellite GOSAT data. This study was based on the research result which is showed a correlation between the lowest monthly average of GWL and Net Ecosystem Exchange (NEE) on peatlands in Central Kalimantan. The NEE value is representing the CO2 emitted from the decomposition process of Peatland due to decreasing of groundwater level which caused by land-use change and land fires. The empirical estimation of carbon emission calculation is based on empirical relationship between soil water moisture, groundwater level and net ecosystem exchange (NEE) that measured by eddy covariance. The comparison this result with GOSAT data show that the empirical relationship between GWL with NEE for each type of peat (UF NEE DF and NEE DB) showed a very strong correlation with a correlation coefficient value of 0.984). This is understandable because the value of GWL for each grid of 0.5 deg estimated from empirical calculation of the value of soil moisture and three data GWL representing all three types of peat with Krigging interpolation. On the other hand, the correlation between CO2 data GOSAT with NEE values did not show any correlation even the correlation coefficient between NEE and CO2 GOSAT data is worth the negative (which is supposed to be positive) correlation value of -0.68