Carbon dioxide and water vapour characteristics on the west coast of Arabian Sea during Indian summer monsoon

• Published in: Journal of Earth System Science Vol. 121; no. 4; pp. 903 - 910
• Main Authors: DHARMARAJ, T, PATIL, M N, WAGHMARE, R T, ERNEST RAJ, P
• Format: Journal Article
• Language: English
• Published: India Springer-Verlag 01.08.2012; Springer; Springer Nature B.V
• Subjects: Air temperature; Air-sea interaction; Atmosphere; Carbon dioxide; Carbon dioxide concentration; coasts; Earth and Environmental Science; Earth atmosphere; Earth Sciences; earth system science; Earth, ocean, space; Exact sciences and technology; Fast Fourier transformations; Fast Fourier transforms; Fourier analysis; Fourier transforms; Marine; Meteorology; monsoon season; Monsoons; Oceanographic data; Periodicities; Precipitation; Space Exploration and Astronautics; Space Sciences (including Extraterrestrial Physics; Spectral analysis; Summer; Summer monsoon; Surface boundary layer; Surface layers; Water vapor; Water vapour; wind; Wind measurement; Wind measurements; Arabian Sea; India; Indian Ocean; Goa India; Asia; United States > US; Europe; ISW, Arabian Sea; ISW, India, Goa; Carbon dioxide; water vapour; Indian summer monsoon; power spectra; experimental studies; carbon dioxide; Fourier transformation; winds; sampling; periodicity; temperature; concentration; air; monsoons
• ISSN: 0253-4126; 2347-4327; 0973-774X
• DOI: 10.1007/s12040-012-0201-y

Carbon dioxide, water vapour, air temperature and wind measurements at 10 Hz sampling rate were carried out over the coast of Arabian Sea, Goa (15°21′N, 73°51′E) in India. These observations were collected, in association with the surface layer turbulent parameters for the Arabian Sea Monsoon Experiment (ARMEX). In the summer monsoon period, concentration of CO2 was in the range of 550–790 mg m − 3 whereas the water vapour was in the range of 17.5–24.5 g m − 3. The Fast Fourier Transform (FFT) analysis has been performed on these observations to investigate the spectral behaviour of CO2 and water vapour. The relation between CO2 and water vapour on various atmospheric scales has been proposed. CO2 and water vapour observations confirmed the existence of periodicities of large (11, 8 days), meso (5 days) and micrometeorological (20 min) scales.