期刊
ATMOSPHERIC ENVIRONMENT
卷 102, 期 -, 页码 1-10出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.atmosenv.2014.11.042
关键词
Water-soluble organic matter; Alkaline-soluble organic matter; Atmospheric aerosols; Fluorescence spectroscopy; Emission-excitation matrix; PARAFAC-ALS
资金
- Centre for Environmental and Marine Studies (University of Aveiro, Portugal) [PEsT-c/MAR/LA0017/2013]
- Portuguese Science and Technology Foundation (FCT) through European Social Fund (ESF)
- Programa Operacional Potencial Humano - POPH
- FCT [SFRH/BD/84247/2012]
- Portuguese Institute for Development (IPAD)
- FEDER under Operational Program for Competitiveness Factors - COMPETE
- National funds via FCT [PTDC/CTE-ATM/118551/2010, PTDC/AAG-MAA/2584/2012]
- Fundação para a Ciência e a Tecnologia [SFRH/BD/84247/2012, PTDC/AAG-MAA/2584/2012, PTDC/CTE-ATM/118551/2010] Funding Source: FCT
Understanding the complexity of Natural Organic Matter (NOM) in atmospheric aerosols has remained an important goal for the atmospheric research community. This work employs a Parallel Factor Model (PARAFAC) with Alternating Least Squares (ALS) algorithm to decompose and further compare sets of excitation-emission matrices fluorescence spectra of Water-soluble and Alkaline-soluble Organic Matter (WSOM and ASOM, respectively), sequentially extracted from urban aerosols collected during different seasons. The PARAFAC-ALS modelling identified three components in both WSOM and ASOM, whose maximum intensities follow a clear seasonal trend and which are likely to represent the dominant fluorescent moieties in NOM from urban aerosols. The PARAFAC-ALS modelling also indicated differences between the colder and warmer seasons in the fluorescence map of one WSOM component, which contrast with the results obtained for the ASOM, where the fluorescence signatures were found to be constant along the seasons, suggesting that the ASOM may have an in situ origin. (C) 2014 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据