Photolytic rates for NO2, O3 and HCHO in the atmosphere of Mexico City

Ruiz‐Suárez, J. C.; Ruíz-Suárez, L. G.; Castro, T.; Martín, Montero; Eidels-Dubovoi, S.; Muhlia, A.

doi:10.1016/0960-1686(93)90116-g

Cited by 8 publications

(2 citation statements)

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“…Earthquake safety concerns, however, have restricted residential and industrial usage of natural gas. Consequently, the gas infrastructure is limited in scope and leak rates are comparable to other urban areas (Shorter et al, 1996;Harriss, 1994;Houghton et al, 1996). If the use of natural gas were widespread, we might well expect both the fractional and absolute leak rates to increase; maintaining a large network would be difficult under the tight fiscal restrictions faced by Mexico and other emerging megacities (Chen and Heligman, 1994;Nord, 1996).…”

Section: Discussionmentioning

confidence: 99%

“…Garfias and Gonzalez, 1992;Nickerson et al, 1992;Ruiz-Suarez et al, 1993;Blake and Rowland, 1995;Streit and Guzman, 1996;Riveros et al, 1995;Bossert, 1997;Elliott et al, 1997; (Pick and Butler, 1997). Open arrows indicate water inputs into the basin; the large filled arrow indicates the open sewage channel (the 'Grand Canal') by which most wastewater exists.…”

Section: Discussionmentioning

confidence: 99%

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Spatiotemporal variation of methane and other trace hydrocarbon concentrations in the Valley of Mexico

Smith

Elliott

Blake

et al. 2002

Environmental Science & Policy

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Mexico City is the world's largest and most polluted urban center. We examine the distribution of methane and other hydrocarbons within the Valley of Mexico, using it as a model for the role developing megacities will play in the next century of geochemical cycling. Seventy-five whole air samples were analyzed with multivariate statistical techniques, including factor analysis using principal components. Methane concentrations are highly variable in space and time, due to air circulations and source distribution. Landfills and open sewage canals are major inputs. Emissions into and out from the valley are modeled to be ∼515 t per day. Per capita emission is 0.01 t per annum per person, consistent with the global average for human related anaerobic generation. Natural gas leaks are small, and likely to be higher in other developing megacities; Mexican natural gas use has been discouraged out of earthquake safety concerns. In contrast, liquefied petroleum gas loss constitutes the major emission of propane and butane estimated at a leak rate of 5-10%. Kyoto and other environmental conventions have ignored methane as a greenhouse gas. Our analysis underscores the need to consider methane and other hydrocarbons, and the urbanization process, in future emission protocols.

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Section: Discussionmentioning

confidence: 99%