Friday, April 1, 2016

Using OCO-2 Data to Analyze Anthropogenic CO2 Hotspots: First Preliminary Results


just submitted the abstract below to the "12th International Workshop on Greenhouse Gas Measurements from Space." I am not going, but our boss Johanna Tamminen will present this.


Using OCO-2 Data to Analyze Anthropogenic CO2 Hotspots:
First Preliminary Results

Janne Hakkarainen (1), Iolanda Ialongo (1), and Johanna Tamminen (1)
(1) Finnish Meteorological Institute (FMI)

NASA’s Orbiting Carbon Observatory 2 (OCO-2) was launched on 2 July 2014 to monitor global atmospheric concentration and flux of CO2 from space. As of March 2016, the instrument has collected more than one year of data. In this paper, we utilize this data record to analyze hotspots of anthropogenic CO2 sources. Our aim is to utilize advanced techniques developed to analyze spaceborne nitrogen dioxide (NO2) and sulfur dioxide (SO2)both short-lived atmospheric trace gases with both anthropogenic and natural sourcesdatasets. Unfortunately, trends, seasonality, long lifetime, and large atmospheric background significantly complicate the analysis of CO2 hotspots. Our methodology is based on simultaneously deseasonalizing and detrending the data, and then mapping the remainingthe so-called anomaly datato a grid.  
In this paper, we show that the main anthropogenic pollution regions like eastern USA, Central Europe, East Asia, and Middle East are easily detectable from our OCO-2 CO2 anomaly maps. In addition, also smaller sources are visible. In order to better understand CO2 anomaly maps, we simultaneously analyze the established NO2 and SO2 mapsobserved by Dutch-Finnish Ozone Monitoring Instrument (OMI) onboard NASA’s Aura spacecraftand use these data records also to qualitatively validate our results. In future, as the OCO-2 data record gets longer, we hope to individually detect all the Megacities.

Keywords: OCO-2, carbon dioxide, anthropogenic emissions, hotspots, validation, OMI, nitrogen dioxide

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