JapanFlux2024 JP-Hrt Hiratsuka Rice Paddy

The seasonal flux dynamics of CH4 and CO2 in paddy fields in temperate Japan and tropical Thailand and the greenhouse gas balance obtained as the sum of CH4 and CO2 will be evaluated to investigate in detail the dynamics and mechanisms of CH4 emissions in paddy fields in tropical Thailand.
Field experiments were conducted during rice-cropping seasons in rice farm paddy fields in Hiratsuka, Kanagawa prefecture, Japan in 2013 and at Kamphaeng Saen campus, Kasetsart University in Nakhon Pathom Province, Thailand in 2014.
The turbulent fluxes of sensible heat, latent heat, CO2 were measured using the eddy covariance system.The CH4 were measured using the HREA(Hyperbolic relaxed eddy accumulation) method and Chamber method.The controlling factors for GHG dynamics and budgets were examined in both climate areas, and field experiments were conducted at around heading and flowering stages when CH4 emission is usually large.