The Fossil Fuel Emissions of Tokyo estimated directly from measurements of the Tsukuba TCCON site

Abstract. We present a simple approach for estimating the greenhouse gas emissions of large cities using accurate long-term data of column-averaged greenhouse gas abundances collected by a nearby FTIR (Fourier Transform InfraRed) spectrometer. We estimate the average yearly carbon emissions from the area of Tokyo to be 86 ± 33 MtCyear between 2011 and 2016, calculated using only measurements from the TCCON site in Tsukuba (north-east of Tokyo) and wind-speed data from nearby radiosondes.