SPATIAL DISTRIBUTION OF CO2 OCO-2 LITE PRODUCT LEVEL 2 AND IDENTIFICATION OF ENVIRONMENTAL INTERACTION ON ATMOSPHERIC CONCENTRATION

• Main Author: Balbo, Fandy
• Format: Theses
• Language: Indonesia
• Subjects: Teknik saniter dan perkotaan; teknik perlindungan lingkungan
• Online Access: https://digilib.itb.ac.id/gdl/view/63165
• Institution: Institut Teknologi Bandung

We use OCO-2 Lite Product Level 2 data based on remote-sensing measurement to surmount the limitations of concentration ground observation data and identify variations in atmospheric concentrations that are thought to be influenced by meteorological factors and terrestrial conditions. First, we assess the feasibility of OCO-2 data as a complement to ground observation data in various spatial scales (global, regional, subregional, and colocation). Furthermore, OCO-2 output is visualized in a spatial map and temporal pattern from September 2014 to December 2020 to obtain variations in concentrations. The interaction of environmental factors, especially meteorological conditions (rainfall, wind, and sea surface temperature) and terrestrial conditions (vegetation and forest fire episodes), was analyzed in spatial and temporal correlation. At Last, we try to identify the effect of water availability proxies in meteorological and terrestrial drought conditions using the SPI and R-DSI methods. The results showed that the OCO-2 Lite Product Level 2 data is suitable to complement ground observation data in terms of global, regional, and subregional situations. In the regional situation in Indonesia, the spatial distribution of ?XCO?_2 concentration increases with the homogeneous distribution. The concentration increased by 16.78 ppm in 76 months, with an annual average increase of 2.8 ppm/year. The temporal pattern shows that the concentration in Indonesia has a seasonal pattern influenced by the pattern of air mass movement each year. These results indicate the contribution of long-range transport pollutants to the concentration in Indonesia. The increase in concentration affects the increase in sea surface temperature with a correlation of 0.4-0.6. The rainfall quantity does not correlate with ?XCO?_2, but the increase of ?XCO?_2 decreases rainwater quality. Forest fires events are not the main cause of the increase in ?XCO?_2 concentrations, but the number of hotspots contributes to the value of increasing ?XCO?_2 every year. Vegetation conditions do not correlate with the concentration of ?XCO?_2 because the vegetation conditions in Indonesia do not change throughout the year. At last, we confirm that SPI's historical drought shows a weak-moderate relationship with ?XCO?_2 but does not correlate with DSI as a terrestrial drought index. We can confirm that meteorological factors have a good interaction with concentrations than the surface conditions (terrestrial).