Performance evaluation of the HR-ELPI + inversion
| Autor: | Sampo Saari, Juha Harra, Jorma Keskinen, Topi Rönkkö, Anssi Arffman |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
010504 meteorology & atmospheric sciences
animal diseases ta1172 Inversion methods Inversion (meteorology) Pramod Kulkarni 010501 environmental sciences 01 natural sciences Pollution Aerosol Measuring instrument Environmental Chemistry Environmental science General Materials Science 0105 earth and related environmental sciences Remote sensing |
| Zdroj: | Saari, S, Arffman, A, Harra, J, Rönkkö, T & Keskinen, J 2018, ' Performance evaluation of the HR-ELPI + inversion ', Aerosol Science and Technology, vol. 52, no. 9, pp. 1037-1047 . https://doi.org/10.1080/02786826.2018.1500679 |
| Popis: | Data inversion methods used in aerosol measurement instruments have significant influence on the resolution and quality of the result. A freshly launched new electrical low pressure impactor (ELPI) instrument version, high resolution ELPI+ (HR-ELPI+, Dekati Ltd.), uses an iterative inversion calculation method to improve particle size resolution, concentration, and data analysis quality. In this article, the performance of the HR-ELPI + is critically analyzed by simulations and experiments in laboratory and field conditions, and the results are compared with a conventional inversion data analysis method (cut-point diameter concept) and with common reference instruments (e.g., SMPS and EEPS). The results showed that the HR-ELPI + inversion has limited performance at the lower and upper limits of the instrument’s size range, and can suffer if the raw currents have signal dependent noise more than 50% or electric noise more than 1%. However, the HR-ELPI + clearly provide remarkably better resolution and quality with low oscillation risk compared to the conventional cut-point diameter concept of the ELPI. The HR-ELPI + also showed generally very similar size distributions and number concentrations compared to the reference instruments. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|