气候变化领域集成服务门户(CCPortal): Spatial and Temporal Variability of Iodine in Aerosol

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DOI	10.1029/2020JD034410
	Spatial and Temporal Variability of Iodine in Aerosol
	Gómez Martín J.C.; Saiz-Lopez A.; Cuevas C.A.; Fernandez R.P.; Gilfedder B.; Weller R.; Baker A.R.; Droste E.; Lai S.
发表日期	2021
ISSN	2169897X
卷号	126 期号:9
英文摘要	In this work, we describe the compilation and homogenization of an extensive data set of aerosol iodine field observations in the period between 1963 and 2018 and we discuss its spatial and temporal dependences by comparison with CAM-Chem model simulations. A close to linear relationship between soluble and total iodine in aerosol is found (∼80% aerosol iodine is soluble), which enables converting a large subset of measurements of soluble iodine into total iodine. The resulting data set shows a distinct latitudinal dependence, with an enhancement toward the Northern Hemisphere (NH) tropics and lower values toward the poles. This behavior, which has been predicted by atmospheric models to depend on the global distribution of the main oceanic iodine source (which in turn depends on the reaction of ozone with aqueous iodide on the sea water-air interface, generating gas-phase I2 and HOI), is confirmed here by field observations for the first time. Longitudinally, there is some indication of a wave-one profile in the tropics, which peaks in the Atlantic and shows a minimum in the Pacific. New data from Antarctica show that the south polar seasonal variation of iodine in aerosol mirrors that observed previously in the Arctic, with two equinoctial maxima and the dominant maximum occurring in spring. While no clear seasonal variability is observed in NH middle latitudes, there is an indication of different seasonal cycles in the NH tropical Atlantic and Pacific. Long-term trends cannot be unambiguously established as a result of inhomogeneous time and spatial coverage and analytical methods. © 2021 The Authors.
英文关键词	aerosol composition; atmospheric iodine; iodine sources
语种	英语
来源期刊	Journal of Geophysical Research: Atmospheres
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/185236
作者单位	Instituto de Astrofísica de Andalucía, CSIC, Granada, Spain; Department of Atmospheric Chemistry and Climate, Institute of Physical Chemistry Rocasolano, CSIC, Madrid, Spain; Institute for Interdisciplinary Science, National Research Council (ICB-CONICET), FCEN-UNCuyo, Mendoza, Argentina; Limnological Research Station, University of Bayreuth, Bayreuth, Bayern, Germany; Department of Glaciology, Alfred-Wegener-Institut Helmholtz Zentrum für Polar- und Meeresforschung, Bremerhaven, Germany; Centre for Ocean and Atmospheric Science, School of Environmental Sciences, University of East Anglia, Norwich, United Kingdom; Department of Environmental Sciences, Wageningen University and Research Centre, Wageningen, Netherlands; South China University of Technology, School of Environment and Energy, Higher Education Mega Center, Guangzhou, China
推荐引用方式 GB/T 7714	Gómez Martín J.C.,Saiz-Lopez A.,Cuevas C.A.,et al. Spatial and Temporal Variability of Iodine in Aerosol[J],2021,126(9).
APA	Gómez Martín J.C..,Saiz-Lopez A..,Cuevas C.A..,Fernandez R.P..,Gilfedder B..,...&Lai S..(2021).Spatial and Temporal Variability of Iodine in Aerosol.Journal of Geophysical Research: Atmospheres,126(9).
MLA	Gómez Martín J.C.,et al."Spatial and Temporal Variability of Iodine in Aerosol".Journal of Geophysical Research: Atmospheres 126.9(2021).