Carbonaceous particles and PM2.5 optical properties in Mexico City during the ACU15 campaign

被引：0

作者：

Santiago-De La Rosa, Naxieli ^{[1
]}

Prieto, Cristina ^{[2
]}

Pavia, Ruben ^{[2
]}

Peralta, Oscar ^{[1
]}

Alvarez-Ospina, Harry ^{[3
]}

Saavedra, Isabel ^{[1
]}

Castro, Telma ^{[1
]}

Garcia, Rocio ^{[1
]}

de la Luz Espinosa, Maria ^{[1
]}

Ortinez-Alvarez, Abraham ^{[4
]}

Ruiz-Suarez, Gerardo ^{[1
]}

Martinez-Arroyo, Amparo ^{[1
]}

机构：

[1] Univ Nacl Autonoma Mexico, Inst Ciencias Atmosfera & Cambio Climat, Circuito Exterior S-N,Ciudad Univ, Mexico City 04510, Mexico

[2] Univ Nacl Autonoma Mexico, Posgrad Ciencias Tierra, Circuito Exterior S-N,Ciudad Univ, Mexico City 04510, Mexico

[3] Univ Nacl Autonoma Mexico, Fac Ciencias, Circuito Exterior S-N,Ciudad Univ, Mexico City 04510, Mexico

[4] Inst Nacl Ecol & Cambio Climat, Carretera Picacho Ajusco 4219, Mexico City 14210, Mexico

来源：

ATMOSFERA | 2024年 / 38卷

关键词：

mass absorption efficiency; elemental carbon; carbonaceous aerosols; Mexico City; PM2.5; MASS ABSORPTION EFFICIENCY; ELEMENTAL CARBON; LIGHT-ABSORPTION; ORGANIC-CARBON; BLACK CARBON; AMBIENT BLACK; BROWN CARBON; AEROSOL; URBAN; DEPENDENCE;

D O I：

10.20937/ATM.53270

中图分类号：

P4 [大气科学（气象学）];

学科分类号：

0706 ; 070601 ;

摘要：

We measured the optical properties of aerosols with two photoacoustic spectrometers operating at 532 and 870 nm wavelengths and sampled PM2.5 to analyze the organic carbon (OC) and elemental carbon (EC) content. The measuring site was in the southwest corner of Mexico City. We sorted the data by OC/EC ratios and calculated four mass absorption efficiencies (MAEs) for each wavelength with linear regressions. The MAEs ranged from 2.27 to 19.75 and 2.03 to 15.26 m(2) g(-1) at 532 and 870 nm, respectively, with determination coefficients above 0.88, showing that the amount of OC modifies the absorption properties of particles, sometimes underestimating or overestimating the black carbon concentration. It is possible to choose the MAE based on the daily median O-3 concentration when there is no information about the EC and OC composition.

引用

页码：369 / 380

页数：12

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