Variation patterns of nitric oxide in Catalonia during the period from 2001 to 2006 using multivariate data analysis methods.

Multivariate data analysis methods are applied to study of the geographical and temporal distribution of nitric oxide (NO) in Catalonia (North-East Spain), measured during the period 2001-2006 in 50 sampling stations. Principal component analysis (PCA) and Multivariate Curve Resolution Alternating Least Squares (MCR-ALS) were applied for that purpose. The simultaneous analysis of NO data from sampling stations showed that its geographical distribution was rather uniform during the period considered. When three individual sampling stations were considered (two urban sites and one rural location), three different temporal patterns were resolved, with marked daily-night changes mainly attributed to traffic and also, important winter-summer seasonal variations. A decreasing trend in the levels of NO has been also observed in recent years. Comparison with nitrogen dioxide (NO(2)) profiles shows that the daily variation is quite similar to the NO variation, however NO(2) displays very little oscillations along the seasons and no reduction of its concentration was observed in the last years, contrasting with NO tendencies. The use of MCR-ALS is confirmed to be a useful method to improve interpretability in atmospheric contamination studies. The use of non-negativity and trilinearity constraints is shown to provide improved interpretations of the different contamination patterns in environmental terms.

[1]  Romà Tauler,et al.  Chemometric modeling of main contamination sources in surface waters of Portugal , 2004, Environmental toxicology and chemistry.

[2]  Romà Tauler,et al.  Multivariate Resolution of Coeluted Peaks in Hyphenated Liquid Chromatography ± Linear Sweep Voltammetry , 2003 .

[3]  I. Jolliffe.  Principal Component Analysis , 2002 .

[4]  Romà Tauler,et al.  A graphical user-friendly interface for MCR-ALS: a new tool for multivariate curve resolution in MATLAB , 2005 .

[5]  Y. Inoue,et al.  Ground level ozone concentrations and its association with NOx and meteorological parameters in Kathmandu valley, Nepal , 2006 .

[6]  Temporal Surface Ozone Patterns in Urban Manitoba, Canada , 2001 .

[7]  L. Ries,et al.  Transport of nitrogen oxides, carbon monoxide and ozone to the Alpine Global Atmosphere Watch stations Jungfraujoch (Switzerland), Zugspitze and Hohenpeissenberg (Germany), Sonnblick (Austria) and Mt. Krvavec (Slovenia) , 2007 .

[8]  Romà Tauler,et al.  Comparison of different multiway methods for the analysis of geographical metal distributions in fish, sediments and river waters in Catalonia , 2007 .

[9]  Extreme Nitrogen Oxide and Ozone Concentrations in Athens Atmosphere in Relation to Meteorological Conditions , 2007, Environmental monitoring and assessment.

[10]  R. Tauler,et al.  Noise propagation and error estimations in multivariate curve resolution alternating least squares using resampling methods , 2004 .

[11]  P. Paatero.  The Multilinear Engine—A Table-Driven, Least Squares Program for Solving Multilinear Problems, Including the n-Way Parallel Factor Analysis Model , 1999 .

[12]  P. Paatero.  A weighted non-negative least squares algorithm for three-way ‘PARAFAC’ factor analysis , 1997 .

[13]  David D. Parrish,et al.  Review of observation-based analysis of the regional factors influencing ozone concentrations , 2000 .

[14]  Romà Tauler,et al.  Chemometrics applied to unravel multicomponent processes and mixtures: Revisiting latest trends in multivariate resolution , 2003 .

[15]  Jin-Ho Park,et al.  Characteristics of roadside air pollution in Korean metropolitan city (Daegu) over last 5 to 6 years: temporal variations, standard exceedances, and dependence on meteorological conditions. , 2005, Chemosphere.

[16]  Joan O. Grimalt,et al.  Prediction of daily ozone concentration maxima in the urban atmosphere , 2006 .

[17]  Norimichi Takenaka,et al.  Weekday/weekend difference of ozone and its precursors in urban areas of Japan, focusing on nitrogen oxides and hydrocarbons , 2008 .

[18]  N. Takenaka,et al.  Impact of NOx reduction on long-term ozone trends in an urban atmosphere. , 2007, The Science of the total environment.

[19]  Rasmus Bro,et al.  Multi-way Analysis with Applications in the Chemical Sciences , 2004 .

[20]  Francisco Javier González Gallero,et al.  Multivariate Statistical Analysis of Meteorological and Air Pollution Data in the ‘Campo De Gibraltar’ Region, Spain , 2006, Environmental monitoring and assessment.

[21]  M. Shah,et al.  Statistical analysis of atmospheric trace metals and particulate fractions in Islamabad, Pakistan. , 2007, Journal of hazardous materials.

[22]  Romà Tauler,et al.  Investigation of geographical and temporal distribution of tropospheric ozone in Catalonia (North-East Spain) during the period 2000–2004 using multivariate data analysis methods , 2006 .

[23]  D. Griffith,et al.  Emissions of the indirect greenhouse gases NH3 and NOx from Australian beef cattle feedlots , 2008 .

[24]  P. Guttorp,et al.  A review of statistical methods for the meteorological adjustment of tropospheric ozone , 2001 .

[25]  R. Bro,et al.  A fast non‐negativity‐constrained least squares algorithm , 1997 .

[26]  Gene H. Golub,et al.  Matrix computations , 1983 .

[27]  Margaret Werner-Washburne,et al.  BMC Bioinformatics BioMed Central Methodology article Multivariate curve resolution of time course microarray data , 2006 .

[28]  B. Kowalski,et al.  Selectivity, local rank, three‐way data analysis and ambiguity in multivariate curve resolution , 1995 .

[29]  S. D. Jong,et al.  Handbook of Chemometrics and Qualimetrics , 1998 .

[30]  Shuenn-Chin Chang,et al.  Evaluation of the temporal variations of air quality in Taipei City, Taiwan, from 1994 to 2003. , 2008, Journal of environmental management.

[31]  H. Oliver Gao,et al.  Day of week effects on diurnal ozone/NOx cycles and transportation emissions in Southern California , 2007 .

[32]  N. Ogawa,et al.  Study of pollutants in precipitation (rain and snow) transported long distance to west coasts of Japan Islands using oblique rotational factor analysis with partially non-negative constraint , 2006 .

[33]  C. Nascimento,et al.  Ground-Level Ozone Mapping in Large Urban Areas Using Multivariate Statistical Analysis: Application to the São Paulo Metropolitan Area , 2003, Journal of the Air & Waste Management Association.

[34]  M. Bergin,et al.  Regional air quality: local and interstate impacts of NO(x) and SO2 emissions on ozone and fine particulate matter in the eastern United States. , 2007, Environmental science & technology.

[35]  Hiroshi Tanaka,et al.  Relationship of NOX and NMHC to photochemical O3 production in a coastal and metropolitan areas of Japan , 2002 .

[36]  Romà Tauler,et al.  Comparison of three‐way resolution methods for non‐trilinear chemical data sets , 2001 .

[37]  R. Tauler.  Multivariate curve resolution applied to second order data , 1995 .

[38]  R. Tauler.  Calculation of maximum and minimum band boundaries of feasible solutions for species profiles obtained by multivariate curve resolution , 2001 .

[39]  J. Tu,et al.  Temporal variations in surface ozone and its precursors and meteorological effects at an urban site in China , 2007 .

[40]  P. Hopke,et al.  Study of urban atmospheric pollution in Navarre (Northern Spain) , 2007, Environmental monitoring and assessment.

[41]  R. Henry,et al.  Extension of self-modeling curve resolution to mixtures of more than three components: Part 1. Finding the basic feasible region , 1990 .