Open AccessTemporal and spatial distribution of the mid-tropospheric CO2 concentrations in Malaysia
Author(s) -
Norsyafiqah Othman,
Zulfa Hanan Ash’aari,
Farrah Melissa Muharam,
Mohhidin Othman,
Mohhidin Othman
Publication year - 2019
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.179
H-Index - 26
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/373/1/012011
Subject(s) - troposphere , environmental science , atmospheric infrared sounder , atmospheric sciences , climatology , monsoon , spatial distribution , precipitation , satellite , meteorology , geography , geology , remote sensing , aerospace engineering , engineering
Satellite observations of CO 2 offer a unique opportunities to improve our understanding of the carbon sources and sinks. Due to the lack of studies of carbon dioxide (CO 2 ) concentration in this region, we first confirmed the reliability of the mid-tropospheric Atmospheric Infrared Sounder (AIRS) CO 2 data using atmospheric CO 2 concentration data from the only available Global Atmospheric Watch (GAW) ground-based station observation in Malaysia. In this study, the spatial and temporal distribution of mid-troposphere CO 2 in Malaysia from January 2009 to December 2012 was analyzed based on AIRS satellite product. The results show that the average CO 2 concentrations were high in the eastern part of the study area and lower in the west. From January 2009 to December 2012, the mid-tropospheric CO 2 concentrations increased gradually with annual growth rate about 1.293 ppmv/a. There was a significant seasonal CO 2 variation with peak concentration was observed during the North-East monsoon (NEM) and the lowest was during South-West monsoon (SWM). The temporal distribution of CO 2 concentrations was mainly affected by the amount of sunlight and precipitation received during both monsoons. The study suggested that mid-tropospheric AIRS CO 2 data product was able to help in understanding the variations of atmospheric CO 2 concentrations comprehensively.