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| 1 | Surface and tropospheric ozone trends in the Southern Hemisphere since 1990: possible linkages to poleward expansion of the Hadley circulation显示文摘Increases in free tropospheric ozone over the past two decades are mainly in the Northern Hemisphere that have been widely documented,while ozone trends in the Southern Hemisphere(SH)remain largely unexplained.Here we first show that in-situ and satellite observations document increases of tropospheric ozone in the SH over 1990–2015.We then use a global chemical transport model to diagnose drivers of these trends.We find that increases of anthropogenic emissions(including methane)are not the most significant contributors.Instead,we explain the trend as due to changes in meteorology,and particularly in transport patterns.We propose a possible linkage of the ozone increases to meridional transport pattern shifts driven by poleward expansion of the SH Hadley circulation(SHHC).The SHHC poleward expansion allows more downward transport of ozone from the stratosphere to the troposphere at higher latitudes,and also enhances tropospheric ozone production through stronger lifting of tropical ozone precursors to the upper troposphere.These together may lead to increasing tropospheric ozone in the extratropical SH,particularly in the middle/upper troposphere and in austral autumn.Poleward expansion of the Hadley circulation is partly driven by greenhouse warming,and the associated increase in tropospheric ozone potentially provides a positive climate feedback amplifying the warming that merits further quantification. | Xiao Lu Lin Zhang Yuanhong Zhao Daniel J.Jacob Yongyun Hu Lu Hu Meng Gao Xiong Liu Irina Petropavlovskikh Audra McClure-Begley Richard Querel | 2019 | Science Bulletin2019，64，6： | 7 |
| 2 | Global inventory of nitrogen oxide emissions constrained by space-based observations of NO2 columns显示文摘 | Randall V.Martin Daniel J.Jacob Kelly Chance | | 0，，： | 1 |
| 3 | Coenzyme Q<sub>10</sub>, a cutaneous antioxidant and energizer显示文摘 | U.Hoppe J.Bergemann W.Diembeck J.Ennen S.Gohla I.Harris J.Jacob J.Kielholz W.Mei D.Pollet D.Schachtschabel G.Sauermann V.Schreiner F.St?b F.Steckel | 2008 | BioFactors (鈥?)2008，，2： | 1 |
| 4 | Eucalyptus Oil-Mediated Synthesis of Gold Nanoparticles显示文摘The search for efficient methods for the synthesis of metal nanoparticles has been widely explored.Within this context,the use of biological materials such as plants,algae,bacteria and fungi has been reported to various metal nanoparticles as an efficient,low-cost and environmental friendly approach.In this paper we present a single-step method for synthesizing gold nanoparticles,by using essential oils from Brazilian Eucalyptus leaves(urograndis and dunnii).The results strongly suggest that the presence of a stronger bioreducing agent,α-Terpinyl acetate,in the Eucalyptus urograndis,results in higher antioxidant capacity and hence in the synthesis of gold nanoparticles with more controlled size distribution. | Anderson Thesing JoséE.R.do Nascimento Raquel J.Jacob Jacqueline F.L.Santos | 2018 | Journal of Chemistry and Chemical Engineering2018，12，2： | 0 |
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