Erik Velasco

TL;DR: The Mexico City metropolitan area (MCMA) study in 2003 had measurements of many atmospheric constituents, including OH and HO2, and provided the first opportunity to examine atmospheric oxidation in a megacity in a developing country that has more pollution than typical U.S. and European cities as discussed by the authors.

TL;DR: In this paper, the authors present the basic principles and requirements of the eddy covariance (EC) technique, discusses its application in the urban context and summarizes observations from over 30 EC systems, primarily deployed in midlatitude cities.

TL;DR: In a densely populated section of Mexico City, an eddy covariance (EC) flux system was deployed on a tall urban tower to obtain direct measurements of CO 2 emissions from an urban neighborhood located in a subtropical megacity as discussed by the authors.

TL;DR: A wide array of volatile organic compound (VOC) measurements was conducted in the Valley of Mexico during the MCMA-2002 and 2003 field campaigns as discussed by the authors, where four distinct analytical techniques were used: whole air canister samples with Gas Chromatography/Flame Ionization Detection (GC-FID), on-line chemical ionization using a Proton Transfer Reaction Mass Spectrometer (PTR-MS), continuous real-time detection of olefins using a Fast Olefin Sensor (FOS), and long path measurements using UV Differential Optical Absorption Spect

TL;DR: In this article, the authors investigate if the typically evergreen vegetation in (sub)tropical cities has a larger potential for carbon sequestration, the CO2 flux data from two residential neighborhoods of Singapore and Mexico City were analyzed.