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  • Articles  (2,696)
  • 2015-2019  (2,696)
  • 2017  (2,696)
  • Atmospheric Chemistry and Physics  (997)
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  • 42429
  • Geosciences  (2,696)
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  • 1
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    Interannual variation, decadal trend, and future change in ozone outflow from East Asia (2017)
    Copernicus
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    Publication Date: 2017-03-18
    Description: Interannual variation, decadal trend, and future change in ozone outflow from East Asia Jia Zhu, Hong Liao, Yuhao Mao, Yang Yang, and Hui Jiang Atmos. Chem. Phys., 17, 3729-3747, doi:10.5194/acp-17-3729-2017, 2017 Asian O 3 outflow exhibited a small and statistically insignificant decadal trend with large interannual variations from 1986–2006. The latter were mainly caused by variations in the meteorological conditions. Future climate change will aggravate the effects of the increases in anthropogenic emissions on future changes in the Asian O 3 outflow. These findings help us to understand the variations in tropospheric O 3 in the regions downwind of East Asia on different timescales.
    Print ISSN: 1680-7316
    Electronic ISSN: 1680-7324
    Topics: Geosciences
    Published by Copernicus on behalf of The European Geosciences Union (EGU).
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  • 2
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    Tracing changes in atmospheric moisture supply to the drying Southwest China (2017)
    Copernicus
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    Publication Date: 2017-03-18
    Description: Tracing changes in atmospheric moisture supply to the drying Southwest China Chi Zhang, Qiuhong Tang, Deliang Chen, Laifang Li, Xingcai Liu, and Huijuan Cui Atmos. Chem. Phys. Discuss., doi:10.5194/acp-2017-147,2017 Manuscript under review for ACP (discussion: open, 0 comments) Precipitation over Southwest China (SWC) decreased significantly in recent years. By attributing precipitation to its sources, we found that the reduced precipitation is resulted from the reduced moisture supply from regions influenced by the South Asian Summer Monsoon and the westerlies. Further study revealed the dynamic variations in circulation dominate the interannual variations in precipitation over SWC. Changes in circulation systems may be related to the recent changes in SSTs.
    Print ISSN: 1680-7316
    Electronic ISSN: 1680-7324
    Topics: Geosciences
    Published by Copernicus on behalf of The European Geosciences Union (EGU).
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  • 3
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    Potential impact of carbonaceous aerosols on the Upper Troposphere and Lower Stratosphere (UTLS) during Asian summer monsoon in a global model simulation (2017)
    Copernicus
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    Publication Date: 2017-03-18
    Description: Potential impact of carbonaceous aerosols on the Upper Troposphere and Lower Stratosphere (UTLS) during Asian summer monsoon in a global model simulation Suvarna Fadnavis, Gayatry Kalita, K. Ravi Kumar, Blaz Gasparini, and Jui-Lin Frank Li Atmos. Chem. Phys. Discuss., doi:10.5194/acp-2017-197,2017 Manuscript under review for ACP (discussion: open, 0 comments) In this study, the model simulations show that monsoon convection over the Bay of Bengal, the South China Sea and Southern flanks of the Himalayas transport Asian carbonaceous aerosol into the UTLS. Carbonaceous aerosol induces enhancement in heating rate, vertical velocity and water vapor transport in the UTLS.Doubling of BC + OC aerosols creates an anomalous warming over the TP. It elicits monsoon Hadley circulation and thus increases precipitation over India and northeast China.
    Print ISSN: 1680-7316
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    Topics: Geosciences
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  • 4
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    Sensitivity of transatlantic dust transport to chemical aging and related atmospheric processes (2017)
    Copernicus
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    Publication Date: 2017-03-21
    Description: Sensitivity of transatlantic dust transport to chemical aging and related atmospheric processes Mohamed Abdelkader, Swen Metzger, Benedikt Steil, Klaus Klingmüller, Holger Tost, Andrea Pozzer, Georgiy Stenchikov, Leonard Barrie, and Jos Lelieveld Atmos. Chem. Phys., 17, 3799-3821, doi:10.5194/acp-17-3799-2017, 2017 We present a modeling study on the impacts of the key processes (dust emission flux, convection and dust aging parameterizations) that control the transatlantic dust transport using an advanced version of the EMAC atmospheric chemistry general circulation model. We define the direct effect of dust aging as an increase in the AOD as a result of hygroscopic growth. We define the indirect effect as a reduction in the dust AOD due to the higher removal of the aged dust particles.
    Print ISSN: 1680-7316
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    Topics: Geosciences
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  • 5
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    Linking diverse nutrient patterns to different water masses within anticyclonic eddies in the upwelling system off Peru (2017)
    Copernicus
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    Publication Date: 2017-03-21
    Description: Linking diverse nutrient patterns to different water masses within anticyclonic eddies in the upwelling system off Peru Yonss Saranga José, Heiner Dietze, and Andreas Oschlies Biogeosciences, 14, 1349-1364, doi:10.5194/bg-14-1349-2017, 2017 This study aims to investigate the diverse subsurface nutrient patterns observed within anticyclonic eddies in the upwelling system off Peru. Two simulated anticyclonic eddies with opposing subsurface nitrate concentrations were analysed. The results show that diverse nutrient patterns within anticyclonic eddies are related to the presence of water mass from different origins at different depths, responding to variations in depth of the circulation strength at the edge of the eddy.
    Print ISSN: 1810-6277
    Electronic ISSN: 1810-6285
    Topics: Biology , Geosciences
    Published by Copernicus on behalf of The European Geosciences Union (EGU).
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  • 6
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    Gas chromatography vs. quantum cascade laser-based N2O flux measurements using a novel chamber design (2017)
    Copernicus
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    Publication Date: 2017-03-21
    Description: Gas chromatography vs. quantum cascade laser-based N 2 O flux measurements using a novel chamber design Christian Brümmer, Bjarne Lyshede, Dirk Lempio, Jean-Pierre Delorme, Jeremy J. Rüffer, Roland Fuß, Antje M. Moffat, Miriam Hurkuck, Andreas Ibrom, Per Ambus, Heinz Flessa, and Werner L. Kutsch Biogeosciences, 14, 1365-1381, doi:10.5194/bg-14-1365-2017, 2017 We present a novel chamber design for measuring soil–atmosphere N 2 O fluxes and compare the performance of a commonly applied gas chromatography (GC) setup with laser-based (QCL) concentration detection. While GC was still a useful method for longer-term investigations, we found that closure times of 10 min and sampling every 5 s is sufficient when using a QCL system. Further, extremely low standard errors (
    Print ISSN: 1810-6277
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    Topics: Biology , Geosciences
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  • 7
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    Drivers of multi-century trends in the atmospheric CO2 mean annual cycle in a prognostic ESM (2017)
    Copernicus
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    Publication Date: 2017-03-21
    Description: Drivers of multi-century trends in the atmospheric CO 2 mean annual cycle in a prognostic ESM Jessica Liptak, Gretchen Keppel-Aleks, and Keith Lindsay Biogeosciences, 14, 1383-1401, doi:10.5194/bg-14-1383-2017, 2017 We analyzed the evolution of the atmospheric CO 2 mean annual cycle simulated during 1950–2300 under three scenarios designed to separate the effects of climate change, CO 2 fertilization, and land use change. CO 2 fertilization in boreal and temperate ecosystems drove mean annual cycle amplification over the NH midlatitudes during 1950–2300. Boreal and Arctic climate change drove high-latitude amplification before 2200, after which CO 2 fertilization contributed nearly equally to amplification.
    Print ISSN: 1810-6277
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    Topics: Biology , Geosciences
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  • 8
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    Global distribution of CO2 in the upper troposphere and stratosphere (2017)
    Copernicus
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    Publication Date: 2017-03-22
    Description: Global distribution of CO 2 in the upper troposphere and stratosphere Mohamadou Diallo, Bernard Legras, Eric Ray, Andreas Engel, and Juan A. Añel Atmos. Chem. Phys., 17, 3861-3878, doi:10.5194/acp-17-3861-2017, 2017 We construct a new monthly zonal mean CO 2 distribution from the upper troposphere to the stratosphere over the 2000–2010 period. The main features of the CO 2 distribution are consistent with expected variability due to the transport of long-lived trace gases by the Brewer–Dobson circulation. The method used to construct this CO 2 product is unique and should be useful for model and satellite validation in the upper troposphere and stratosphere.
    Print ISSN: 1680-7316
    Electronic ISSN: 1680-7324
    Topics: Geosciences
    Published by Copernicus on behalf of The European Geosciences Union (EGU).
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  • 9
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    On biases in atmospheric CO inversions assimilating MOPITT satellite retrievals (2017)
    Copernicus
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    Publication Date: 2017-03-22
    Description: On biases in atmospheric CO inversions assimilating MOPITT satellite retrievals Yi Yin, Frederic Chevallier, Philippe Ciais, Gregoire Broquet, Anne Cozic, Sophie Szopa, and Yilong Wang Atmos. Chem. Phys. Discuss., doi:10.5194/acp-2017-166,2017 Manuscript under review for ACP (discussion: open, 0 comments) CO inverse modelling studies have so far reported significant discrepancies between model concentrations optimised with the Measurement of Pollution in the Troposphere (MOPITT) satellite retrievals and surface in-situ measurements. Here, we assess how well a global CTM fits a large variety of independent CO observations before and after assimilating MOPITTv6 retrievals to optimise CO sources/sink and discuss potential sources of errors and their implications for global CO modelling studies.
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    Topics: Geosciences
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  • 10
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    The Variability of Relationship between Black Carbon and Carbon Monoxide over the Eastern Coast of China: BC Aging during Transport (2017)
    Copernicus
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    Publication Date: 2017-03-22
    Description: The Variability of Relationship between Black Carbon and Carbon Monoxide over the Eastern Coast of China: BC Aging during Transport Qingfeng Guo, Min Hu, Song Guo, Zhijun Wu, Jianfei Peng, and Yusheng Wu Atmos. Chem. Phys. Discuss., doi:10.5194/acp-2017-56,2017 Manuscript under review for ACP (discussion: open, 0 comments) To characterize primary emissions over the eastern coast of China, a cascade of field campaign was conducted. The high loadings of both BC and CO imply the severe anthropogenic pollution over the areas. The slopes between BC and CO at different areas reveal the vehicular emission as the common source and the distinct fuel structures between North and South China. The comparisons of slopes and correlation coefficient among these areas indicate the more aging of BC in East China Sea.
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