Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1088/1748-9326/aa7885 |
Sensitivity of global greenhouse gas budgets to tropospheric ozone pollution mediated by the biosphere | |
Wang, Bin; Shugart, Herman H.; Lerdau, Manuel T. | |
2017-08-01 | |
发表期刊 | ENVIRONMENTAL RESEARCH LETTERS |
ISSN | 1748-9326 |
出版年 | 2017 |
卷号 | 12期号:8 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Tropospheric ozone (O-3), a harmful secondary air pollutant, can affect the climate via direct radiative forcing and by modifying the radiative forcing of aerosols through its role as an atmospheric oxidant. Moreover, O-3 exerts a strong oxidative pressure on the biosphere and indirectly influences the climate by altering the materials and energy exchange between terrestrial ecosystems and the atmosphere. However, the magnitude by which O-3 affects the global budgets of greenhouse gases (GHGs: CO2, CH4, and N2O) through altering the land-atmosphere exchange is largely unknown. Here we assess the sensitivity of these budgets to tropospheric O-3 pollution based on a meta-analysis of experimental studies on the effects of elevated O-3 on GHG exchange between terrestrial ecosystems and the atmosphere. We show that across ecosystems, elevated O-3 suppresses N2O emissions and both CH4 emissions and uptake, and has little impact on stimulation of soil CO2 emissions except at relatively high concentrations. Therefore, the soil system would be transformed from a sink into a source of GHGs with O-3 levels increasing. The global atmospheric budget of GHGs is sensitive to O-3 pollution largely because of the carbon dioxide accumulation resulting from suppressed vegetation carbon uptake; the negative contributions from suppressed CH4 and N2O emissions can offset only similar to 10% of CO2 emissions from the soil-vegetation system. Based on empirical data, this work, though with uncertainties, provides the first assessment of sensitivity of global budgets of GHGs to O-3 pollution, representing a necessary step towards fully understanding and evaluating O-3-climate feedbacks mediated by the biosphere. |
英文关键词 | ozone greenhouse gas metaanalysis carbon cycle terrestrial ecosystem nitrous oxide methane |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000406139000001 |
WOS关键词 | NET PRIMARY PRODUCTIVITY ; SUB-ALPINE GRASSLAND ; ELEVATED CO2 ; NITROGEN DEPOSITION ; CARBON ; METAANALYSIS ; CLIMATE ; O-3 ; PHOTOSYNTHESIS ; GROWTH |
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/14893 |
专题 | 气候变化 |
作者单位 | Univ Virginia, Dept Environm Sci, 291 McCormick Rd,POB 400123, Charlottesville, VA 22904 USA |
推荐引用方式 GB/T 7714 | Wang, Bin,Shugart, Herman H.,Lerdau, Manuel T.. Sensitivity of global greenhouse gas budgets to tropospheric ozone pollution mediated by the biosphere[J]. ENVIRONMENTAL RESEARCH LETTERS,2017,12(8). |
APA | Wang, Bin,Shugart, Herman H.,&Lerdau, Manuel T..(2017).Sensitivity of global greenhouse gas budgets to tropospheric ozone pollution mediated by the biosphere.ENVIRONMENTAL RESEARCH LETTERS,12(8). |
MLA | Wang, Bin,et al."Sensitivity of global greenhouse gas budgets to tropospheric ozone pollution mediated by the biosphere".ENVIRONMENTAL RESEARCH LETTERS 12.8(2017). |
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