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Ring of impact from the mega-urbanization of Beijing between 2000 and 2009

Ring of impact from the mega-urbanization of Beijing between 2000 and 2009
Ring of impact from the mega-urbanization of Beijing between 2000 and 2009

The transient climate, soil, and air quality impacts of the rapid urbanization of Beijing between 2000 and 2009 are investigated with three-dimensional computer model simulations. The simulations integrate a new satellite data set for urban extent and a geolocated crowd-sourced data set for road surface area and consider differences only in urban land cover and its physical properties. The simulations account for changes in meteorologically driven natural emissions but do not include changes in anthropogenic emissions resulting from urbanization and road network variations. The astounding urbanization, which quadrupled Beijing urban extent between 2000 and 2009 in terms of physical infrastructure change, created a ring of impact that decreased surface albedo, increased ground and near-surface air temperatures, increased vertical turbulent kinetic energy, and decreased the near-surface relative humidity and wind speed. The meteorological changes alone decreased near-surface particulate matter, nitrogen oxides (NOx), and many other chemicals due to vertical dilution but increased near-surface ozone due to the higher temperature and lower NO. Vertical dilution and wind stagnation increased elevated pollution layers and column aerosol extinction. In sum, the ring of impact around Beijing may have increased urban heating, dried soil, mixed pollutants vertically, aggravated air stagnation, and increased near-surface oxidant pollution even before accounting for changes in anthropogenic emissions.

2169-8996
5740-5756
Jacobson, Mark Z.
2d2983f0-c280-4bb1-b718-834462d8b187
Nghiem, Son V.
adefb467-c15c-4092-863a-e7833765a6e9
Sorichetta, Alessandro
c80d941b-a3f5-4a6d-9a19-e3eeba84443c
Whitney, Natasha
7af09e65-bbff-45f2-ba85-de65f2de0bd8
Jacobson, Mark Z.
2d2983f0-c280-4bb1-b718-834462d8b187
Nghiem, Son V.
adefb467-c15c-4092-863a-e7833765a6e9
Sorichetta, Alessandro
c80d941b-a3f5-4a6d-9a19-e3eeba84443c
Whitney, Natasha
7af09e65-bbff-45f2-ba85-de65f2de0bd8

Jacobson, Mark Z., Nghiem, Son V., Sorichetta, Alessandro and Whitney, Natasha (2015) Ring of impact from the mega-urbanization of Beijing between 2000 and 2009. Journal of Geophysical Research: Atmospheres, 120 (12), 5740-5756. (doi:10.1002/2014JD023008).

Record type: Article

Abstract

The transient climate, soil, and air quality impacts of the rapid urbanization of Beijing between 2000 and 2009 are investigated with three-dimensional computer model simulations. The simulations integrate a new satellite data set for urban extent and a geolocated crowd-sourced data set for road surface area and consider differences only in urban land cover and its physical properties. The simulations account for changes in meteorologically driven natural emissions but do not include changes in anthropogenic emissions resulting from urbanization and road network variations. The astounding urbanization, which quadrupled Beijing urban extent between 2000 and 2009 in terms of physical infrastructure change, created a ring of impact that decreased surface albedo, increased ground and near-surface air temperatures, increased vertical turbulent kinetic energy, and decreased the near-surface relative humidity and wind speed. The meteorological changes alone decreased near-surface particulate matter, nitrogen oxides (NOx), and many other chemicals due to vertical dilution but increased near-surface ozone due to the higher temperature and lower NO. Vertical dilution and wind stagnation increased elevated pollution layers and column aerosol extinction. In sum, the ring of impact around Beijing may have increased urban heating, dried soil, mixed pollutants vertically, aggravated air stagnation, and increased near-surface oxidant pollution even before accounting for changes in anthropogenic emissions.

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More information

Accepted/In Press date: 19 May 2015
e-pub ahead of print date: 21 May 2015
Published date: 27 June 2015

Identifiers

Local EPrints ID: 430878
URI: http://eprints.soton.ac.uk/id/eprint/430878
ISSN: 2169-8996
PURE UUID: 99d3424f-816e-482f-8461-9d780177c296
ORCID for Alessandro Sorichetta: ORCID iD orcid.org/0000-0002-3576-5826

Catalogue record

Date deposited: 16 May 2019 16:30
Last modified: 10 Nov 2021 03:36

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Contributors

Author: Mark Z. Jacobson
Author: Son V. Nghiem
Author: Natasha Whitney

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