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Article

Using OCO-2 Satellite Data for Investigating the Variability of Atmospheric CO2 Concentration in Relationship with Precipitation, Relative Humidity, and Vegetation over Oman

1
Department of Water Engineering, Oceanic and Atmospheric Research Center, College of Agriculture, Shiraz University, Shiraz 8178757449, Iran
2
Department of Soils, Water, and Agricultural Engineering, Sultan Qaboos University, Muscat PC123, Oman
3
Faculty of Engineering Science, University of Tehran, Tehran 1665737813, Iran
4
Department of Civil and Architectural Engineering, Sultan Qaboos University, Muscat PC123, Oman
*
Author to whom correspondence should be addressed.
Received: 31 October 2019 / Revised: 22 December 2019 / Accepted: 24 December 2019 / Published: 27 December 2019
(This article belongs to the Special Issue Spatial Modelling in Water Resources Management)
Recognition of the carbon dioxide (CO2) concentration variations over time is critical for tracing the future changes in climate both globally and regionally. In this study, a time series analysis of atmospheric CO2 concentration and its relationship with precipitation, relative humidity (RH), and vegetation is investigated over Oman. The daily XCO2 data from OCO-2 satellite was obtained from September 2014 to March 2019. The daily RH and precipitation data were also collected from the ground weather stations, and the Normalized Difference Vegetation Index was obtained from MODIS. Oman was studied in four distinct regions where the main emphasis was on the Monsoon Region in the far south. The CO2 concentration time series indicated a significant upward trend over different regions for the study period, with annual cycles being the same for all regions except the Monsoon Region. This is indicative of RH, precipitation, and consequently vegetation cover impact on atmospheric CO2 concentration, resulting in an overall lower annual growth in the Monsoon Region. Simple and multiple correlation analyses of CO2 concentration with mentioned parameters were performed in zero to three-month lags over Oman. They showed high correlations mainly during the rainfall period in the Monsoon Region. View Full-Text
Keywords: OCO-2 satellite; CO2 concentration; relative humidity; precipitation; NDVI OCO-2 satellite; CO2 concentration; relative humidity; precipitation; NDVI
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MDPI and ACS Style

Golkar, F.; Al-Wardy, M.; Saffari, S.F.; Al-Aufi, K.; Al-Rawas, G. Using OCO-2 Satellite Data for Investigating the Variability of Atmospheric CO2 Concentration in Relationship with Precipitation, Relative Humidity, and Vegetation over Oman. Water 2020, 12, 101. https://0-doi-org.brum.beds.ac.uk/10.3390/w12010101

AMA Style

Golkar F, Al-Wardy M, Saffari SF, Al-Aufi K, Al-Rawas G. Using OCO-2 Satellite Data for Investigating the Variability of Atmospheric CO2 Concentration in Relationship with Precipitation, Relative Humidity, and Vegetation over Oman. Water. 2020; 12(1):101. https://0-doi-org.brum.beds.ac.uk/10.3390/w12010101

Chicago/Turabian Style

Golkar, Foroogh, Malik Al-Wardy, Seyedeh F. Saffari, Kathiya Al-Aufi, and Ghazi Al-Rawas. 2020. "Using OCO-2 Satellite Data for Investigating the Variability of Atmospheric CO2 Concentration in Relationship with Precipitation, Relative Humidity, and Vegetation over Oman" Water 12, no. 1: 101. https://0-doi-org.brum.beds.ac.uk/10.3390/w12010101

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