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Effect of VOC emissions from vegetation on urban air quality during hot periods

Churkina, G. and Kuik, F. and Bonn, B. and Lauer, Axel and Grote, R. and Butler, T. (2016) Effect of VOC emissions from vegetation on urban air quality during hot periods. European Geosciences Union General Assembly 2016, 17-22 April 2016, Vienna, Austria.

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Programs to plant millions of trees in cities around the world aim at the reduction of summer temperatures, increase of carbon storage, storm water control, and recreational space, as well as at poverty alleviation. These urban greening programs, however, do not take into account how closely human and natural systems are coupled in urban areas. Compared with the surroundings of cities, elevated temperatures together with high anthropogenic emissions of air and water pollutants are quite typical in urban systems. Urban and sub-urban vegetation respond to changes in meteorology and air quality and can react to pollutants. Neglecting this coupling may lead to unforeseen negative effects on air quality resulting from urban greening programs. The potential of emissions of volatile organic compounds (VOC) from vegetation combined with anthropogenic emissions of air pollutants to produce ozone has long been recognized. This ozone formation potential increases under rising temperatures. Here we investigate how emissions of VOC from urban vegetation affect corresponding ground-level ozone and PM10 concentrations in summer and especially during heat wave periods. We use the Weather Research and Forecasting Model with coupled atmospheric chemistry (WRF-CHEM) to quantify these feedbacks in the Berlin-Brandenburg region, Germany during the two summers of 2006 (heat wave) and 2014 (reference period). VOC emissions from vegetation are calculated by MEGAN 2.0 coupled online with WRF-CHEM. Our preliminary results indicate that the contribution of VOCs from vegetation to ozone formation may increase by more than twofold during heat wave periods. We highlight the importance of the vegetation for urban areas in the context of a changing climate and discuss potential tradeoffs of urban greening programs.

Item URL in elib:https://elib.dlr.de/104154/
Document Type:Conference or Workshop Item (Speech)
Title:Effect of VOC emissions from vegetation on urban air quality during hot periods
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Grote, R.Karlsruhe Institute of TechnologyUNSPECIFIEDUNSPECIFIED
Date:April 2016
Refereed publication:No
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Series Name:Geophysical Research Abstracts
Keywords:WRF-Chem, heat wave, air quality, VOC, ozone, vegetation
Event Title:European Geosciences Union General Assembly 2016
Event Location:Vienna, Austria
Event Type:international Conference
Event Dates:17-22 April 2016
Organizer:European Geosciences Union
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Earth Observation
DLR - Research area:Raumfahrt
DLR - Program:R EO - Earth Observation
DLR - Research theme (Project):R - Atmospheric and climate research
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Atmospheric Physics > Earth System Modelling
Deposited By: Lauer, Axel
Deposited On:28 Apr 2016 08:21
Last Modified:10 May 2016 23:47

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