气候变化领域集成服务门户(CCPortal): Technical note: Effects of uncertainties and number of data points on line fitting-a case study on new particle formation

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DOI	10.5194/acp-19-12531-2019
	Technical note: Effects of uncertainties and number of data points on line fitting-a case study on new particle formation
	Mikkonen S.; Pitkänen M.R.A.; Nieminen T.; Lipponen A.; Isokääntä S.; Arola A.; Lehtinen K.E.J.
发表日期	2019
ISSN	16807316
起始页码	12531
结束页码	12543
卷号	19 期号:19
英文摘要	Fitting a line to two measured variables is considered one of the simplest statistical procedures researchers can carry out. However, this simplicity is deceptive as the linefitting procedure is actually quite a complex problem. Atmospheric measurement data never come without some measurement error. Too often, these errors are neglected when researchers make inferences from their data. To demonstrate the problem, we simulated datasets with different numbers of data points and different amounts of error, mimicking the dependence of the atmospheric new particle formation rate (J1:7) on the sulfuric acid concentration (H2SO4). Both variables have substantial measurement error and, thus, are good test variables for our study. We show that ordinary least squares (OLS) regression results in strongly biased slope values compared with six error-in-variables (EIV) regression methods (Deming regression, principal component analysis, orthogonal regression, Bayesian EIV and two different bivariate regression methods) that are known to take errors in the variables into account. © 2019 Author(s).
语种	英语
scopus关键词	atmospheric chemistry; concentration (composition); data set; sulfuric acid; uncertainty analysis
来源期刊	Atmospheric Chemistry and Physics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/144755
作者单位	Department of Applied Physics, University of Eastern Finland, Kuopio, Finland; Finnish Meteorological Institute, Atmospheric Research Centre of Eastern Finland, Kuopio, Finland; Institute for Atmospheric and Earth System Research, University of Helsinki, Helsinki, Finland
推荐引用方式 GB/T 7714	Mikkonen S.,Pitkänen M.R.A.,Nieminen T.,et al. Technical note: Effects of uncertainties and number of data points on line fitting-a case study on new particle formation[J],2019,19(19).
APA	Mikkonen S..,Pitkänen M.R.A..,Nieminen T..,Lipponen A..,Isokääntä S..,...&Lehtinen K.E.J..(2019).Technical note: Effects of uncertainties and number of data points on line fitting-a case study on new particle formation.Atmospheric Chemistry and Physics,19(19).
MLA	Mikkonen S.,et al."Technical note: Effects of uncertainties and number of data points on line fitting-a case study on new particle formation".Atmospheric Chemistry and Physics 19.19(2019).