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DOI | 10.1029/2018JD029063 |
Understanding Iodine Chemistry Over the Northern and Equatorial Indian Ocean | |
Mahajan, Anoop S.1; Tinel, Liselotte2; Sarkar, Amit3; Chance, Rosie2; Carpenter, Lucy J.2; Hulswar, Shrivardhan4; Mali, Prithviraj1; Prakash, Satya5; Vinayachandran, P. N.6 | |
2019-07-27 | |
发表期刊 | JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
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ISSN | 2169-897X |
EISSN | 2169-8996 |
出版年 | 2019 |
卷号 | 124期号:14页码:8104-8118 |
文章类型 | Article |
语种 | 英语 |
国家 | India; England |
英文摘要 | Observations of halogen oxides, ozone, meteorological parameters, and physical and biogeochemical water column measurements were made in the Indian Ocean and its marine boundary layer as a part of the Second International Indian Ocean Expedition (IIOE-2). The expedition took place on board the oceanographic research vessel Sagar Nidhi during 4-22 December 2015 from Goa, India, to Port Louis, Mauritius. Observations of mixed layer depth, averaged temperature, salinity, and nitrate concentrations were used to calculate predicted iodide concentrations in the seawater. The inorganic iodine ocean-atmosphere flux (hypoiodous acid [HOI] and molecular iodine [I-2]) was computed using the predicted iodide concentrations, measured atmospheric ozone, and wind speed. Iodine oxide (IO) mixing ratios peaked at 0.47 +/- 0.29 pptv (parts per trillion by volume) in the remote open ocean environment. The estimated iodide concentrations and HOI and I-2 fluxes peaked at 200/500 nM, 410/680 nmol.m(-2).day(-1), and 20/80 nmol.m(-2).day(-1), respectively, depending on the parameterization used. The calculated fluxes for HOI and I-2 were higher closer to the Indian subcontinent; however, atmospheric IO was only observed above the detection limit in the remote open ocean environment. We use NO2 observations to show that titration of IO by NO2 is the main reason for this result. These observations show that inorganic iodine fluxes and atmospheric IO show similar trends in the Indian Ocean marine boundary layer, but the impact of inorganic iodine emissions on iodine chemistry is buffered in elevated NOx environments, even though the estimated oceanic iodine fluxes are higher. |
英文关键词 | halogens marine boundary layer ozone iodine flux |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000481444200037 |
WOS关键词 | ABSORPTION CROSS-SECTIONS ; MARINE BOUNDARY-LAYER ; SEA-SURFACE ; ATMOSPHERIC IODINE ; TROPOSPHERIC NO2 ; RAMAN-SCATTERING ; MIXED-LAYER ; MONOXIDE ; OZONE ; EMISSIONS |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/185251 |
专题 | 气候变化 |
作者单位 | 1.Indian Inst Trop Meteorol, Ctr Climate Change Res, Pune, Maharashtra, India; 2.Univ York, Dept Chem, Wolfson Atmospher Chem Labs, York, N Yorkshire, England; 3.Natl Ctr Antarctic & Ocean Res, Vasco Da Gama, Goa, India; 4.Goa Univ, Dept Marine Sci, Taleigao, Goa, India; 5.Indian Natl Ctr Ocean Informat Serv, Hyderabad, India; 6.Indian Inst Sci, Bangalore, Karnataka, India |
推荐引用方式 GB/T 7714 | Mahajan, Anoop S.,Tinel, Liselotte,Sarkar, Amit,et al. Understanding Iodine Chemistry Over the Northern and Equatorial Indian Ocean[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2019,124(14):8104-8118. |
APA | Mahajan, Anoop S..,Tinel, Liselotte.,Sarkar, Amit.,Chance, Rosie.,Carpenter, Lucy J..,...&Vinayachandran, P. N..(2019).Understanding Iodine Chemistry Over the Northern and Equatorial Indian Ocean.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,124(14),8104-8118. |
MLA | Mahajan, Anoop S.,et al."Understanding Iodine Chemistry Over the Northern and Equatorial Indian Ocean".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 124.14(2019):8104-8118. |
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