Isoprene hotspots at the Western Coast of Antarctic Peninsula during MASEC′16

Nadzir, M.S.M. and Cain, M. and Robinson, A.D. and Bolas, C. and Harris, N.R.P. and Parnikoza, I. and Salimun, E. and Mustafa, E.M. and Alhasa, K.M. and Zainuddin, M.H.M. and Ghee, O.C. and Morris, K. and Khan, M.F. and Latif, M.T. and Wallis, B.M. and Cheah, Wee and Zainudin, S.K. and Yusop, N. and Ahmad, M.R. and Hussin, W.M.R.W. and Salleh, S.M. and Hamid, H.H.A. and Lai, G.T. and Uning, R. and Bakar, M.A.A. and Ariff, N.M. and Tuah, Z. and Wahab, M.I.A. and Foong, S.Y. and Samah, Azizan Abu and Chenoli, Sheeba Nettukandy and Wan Johari, W.L. and Zain, C.R.C.M. and Rahman, N.A. and Rosenstiel, T.N. and Yusoff, A.H. and Sabuti, A.A. and Alias, Siti Aisah and Noor, A.Y.M. (2019) Isoprene hotspots at the Western Coast of Antarctic Peninsula during MASEC′16. Polar Science, 20. pp. 63-74. ISSN 1873-9652, DOI

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Isoprene (C5H8) plays an important role in the formation of surface ozone (O3) and the secondary organic aerosol (SOA) which contributed to the climate change. This study aims to determine hourly distribution of tropospheric isoprene over the Western Coast of Antarctic Peninsula (WCAP) during the Malaysian Antarctic Scientific Expedition Cruise 2016 (MASEC′16). In-situ measurements of isoprene were taken using a custom-built gas chromatography with photoionization detector, known as iDirac. Biological parameters such as chlorophyll a (chl-a) and particulate organic carbon (POC) were compared to the in-situ isoprene measurements. Significant positive correlation was observed between isoprene and POC concentrations (r2 = 0.67, p < 0.001), but not between isoprene and chl-a. The hotspots of isoprene over maritime Antarctic were then were investigated using NAME dispersion model reanalysis. Measurements showed that isoprene mixing ratio were the highest over region of King George Island, Deception Island and Booth Island with values of ∼5.0, ∼0.9 and ∼5.2 ppb, respectively. Backward trajectory analysis showed that air masses may have lifted the isoprene emitted by marine algae. We believe our findings provide valuable data set of isoprene estimation over the under sampled WCAP. © 2018 Elsevier B.V. and NIPR

Item Type: Article
Uncontrolled Keywords: Isoprene; Antarctic peninsula; Marine algae
Subjects: G Geography. Anthropology. Recreation
Q Science > Q Science (General)
Q Science > QK Botany
Divisions: Faculty of Arts and Social Sciences
Deputy Vice Chancellor (Research & Innovation) Office > Institute of Ocean and Earth Sciences
Depositing User: Ms. Juhaida Abd Rahim
Date Deposited: 28 Feb 2020 02:55
Last Modified: 28 Feb 2020 02:55

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