Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.5194/acp-18-14133-2018 |
Coupling between surface ozone and leaf area index in a chemical transport model: strength of feedback and implications for ozone air quality and vegetation health | |
Zhou, Shan S.1,2; Tai, Amos P. K.1,2,3,4; Sun, Shihan1,2; Sadiq, Mehliyar1,2; Heald, Colette L.5,6; Geddes, Jeffrey A.7 | |
2018-10-05 | |
发表期刊 | ATMOSPHERIC CHEMISTRY AND PHYSICS
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ISSN | 1680-7316 |
EISSN | 1680-7324 |
出版年 | 2018 |
卷号 | 18期号:19页码:14133-14148 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China; USA |
英文摘要 | Tropospheric ozone is an air pollutant that substantially harms vegetation and is also strongly dependent on various vegetation-mediated processes. The interdependence between ozone and vegetation may constitute feedback mechanisms that can alter ozone concentration itself but have not been considered in most studies to date. In this study we examine the importance of dynamic coupling between surface ozone and leaf area index (LAI) in shaping ozone air quality and vegetation. We first implement an empirical scheme for ozone damage on vegetation in the Community Land Model (CLM) and simulate the steady-state responses of LAI to long-term exposure to a range of prescribed ozone levels (from 0 to 100 ppb). We find that most plant functional types suffer a substantial decline in LAI as ozone level increases. Based on the CLM-simulated results, we develop and implement in the GEOS-Chem chemical transport model a parameterization that computes fractional changes in monthly LAI as a function of local mean ozone levels. By forcing LAI to respond to ozone concentrations on a monthly timescale, the model simulates ozone-LAI coupling dynamically via biogeochemical processes including biogenic volatile organic compound (VOC) emissions and dry deposition, without the complication from meteorological changes. We find that ozone-induced damage on LAI can lead to changes in ozone concentrations by -1.8 to +3 ppb in boreal summer, with a corresponding ozone feedback factor of -0.1 to +0.6 that represents an overall self-amplifying effect from ozone-LAI coupling. Substantially higher simulated ozone due to strong positive feedbacks is found in most tropical forests, mainly due to the ozone-induced reductions in LAI and dry deposition velocity, whereas reduced isoprene emission plays a lesser role in these low-NOx environments. In high-NOx regions such as the eastern US, Europe, and China, however, the feedback effect is much weaker and even negative in some regions, reflecting the compensating effects of reduced dry deposition and reduced isoprene emission (which reduces ozone in high-NOx environments). In remote, low-LAI regions, including most of the Southern Hemisphere, the ozone feedback is generally slightly negative due to the reduced transport of NOx-VOC reaction products that serve as NOx reservoirs. This study represents the first step to accounting for dynamic ozone- vegetation coupling in a chemical transport model with ramifications for a more realistic joint assessment of ozone air quality and ecosystem health. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000446729400002 |
WOS关键词 | TROPOSPHERIC OZONE ; STOMATAL CONDUCTANCE ; PRIMARY PRODUCTIVITY ; ISOPRENE EMISSION ; ELEVATED CO2 ; PHOTOSYNTHESIS ; CHEMISTRY ; CLIMATE ; LEAVES ; CARBON |
WOS类目 | Environmental Sciences ; Meteorology & Atmospheric Sciences |
WOS研究方向 | Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/30753 |
专题 | 地球科学 |
作者单位 | 1.Chinese Univ Hong Kong, Fac Sci, Earth Syst Sci Programme, Shatin, Hong Kong, Peoples R China; 2.Chinese Univ Hong Kong, Fac Sci, Grad Div Earth & Atmospher Sci, Shatin, Hong Kong, Peoples R China; 3.Chinese Univ Hong Kong, State Key Lab Agrobiotechnol, Shatin, Hong Kong, Peoples R China; 4.Chinese Univ Hong Kong, Inst Environm Energy & Sustainabil, Shatin, Hong Kong, Peoples R China; 5.MIT, Dept Civil & Environm Engn, 77 Massachusetts Ave, Cambridge, MA 02139 USA; 6.MIT, Dept Earth Atmospher & Planetary Sci, Cambridge, MA USA; 7.Boston Univ, Dept Earth & Environm, Boston, MA 02215 USA |
推荐引用方式 GB/T 7714 | Zhou, Shan S.,Tai, Amos P. K.,Sun, Shihan,et al. Coupling between surface ozone and leaf area index in a chemical transport model: strength of feedback and implications for ozone air quality and vegetation health[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2018,18(19):14133-14148. |
APA | Zhou, Shan S.,Tai, Amos P. K.,Sun, Shihan,Sadiq, Mehliyar,Heald, Colette L.,&Geddes, Jeffrey A..(2018).Coupling between surface ozone and leaf area index in a chemical transport model: strength of feedback and implications for ozone air quality and vegetation health.ATMOSPHERIC CHEMISTRY AND PHYSICS,18(19),14133-14148. |
MLA | Zhou, Shan S.,et al."Coupling between surface ozone and leaf area index in a chemical transport model: strength of feedback and implications for ozone air quality and vegetation health".ATMOSPHERIC CHEMISTRY AND PHYSICS 18.19(2018):14133-14148. |
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