The MAX-DOAS network in Mexico City to measure atmospheric pollutants

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Edgar Josué Arellano Hernández
Arne Krüeger
Claudia Inés Rivera Cárdenas
Wolfgang Stremme
Martina Michaela Friedrich
Alejandro Bezanilla
Michel Grutter

Abstract

An instrument based on the Multi Axis Differential Optical Absorption Spectroscopy (MAX-DOAS) technique was designed and constructed to measure scattered sunlight in the UV-visible region at different elevation angles. Slant column densities (SCDs) of specific gas absorbers such as nitrogen dioxide (NO2) and formaldehyde (HCHO) are derived from the measured spectra. In this contribution, the technical characteristics and performance of the instruments, their deployment in a newly formed observational network within the metropolitan area of Mexico City, and some results of the retrieved NO2 and HCHO SCDs are presented. These measurements provide more insight on the vertical and spatial distribution of these key atmospheric pollutants and their temporal variability, which also serve as a basis for present and future satellite validation studies.

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Author Biographies

Edgar Josué Arellano Hernández, Centro de Ciencias de la Atmósfera, UNAM

PhD student in Earth Sciences Programa UNAM. Laboratory of Spectroscopy at CCA-UNAM

Arne Krüeger, Centro de Ciencias de la Atmósfera, UNAM

Engenieer in Mechatronics, Completed Masters degree at the University of Hamburg and with research project developed at UNAM.

Claudia Inés Rivera Cárdenas, Facultad de Química Departamento de Química Analítica

Associate Professor (C) at the Chemistry Department, UNAM

Wolfgang Stremme, Centro de Ciencias de la Atmósfera, UNAM

Associate Professor (C) at CCA-UNAM

Martina Michaela Friedrich, Centro de Ciencias de la Atmósfera, UNAM

Postdoc resaercher

Alejandro Bezanilla, Centro de Ciencias de la Atmósfera, UNAM

Academic Technitian A, CCA-UNAM

Michel Grutter, Centro de Ciencias de la Atmósfera, UNAM

Professor (B)

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