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| 1 | Atmospheric pollution of agriculture-oriented cities in Northeast China: A case in Suihua显示文摘Agriculture-oriented cities in Northeastern China have experienced frequent atmospheric pollution events.Deeper understandings of the pollution characteristics,haze causes and effects of management on local air quality are crucial for conducting integrated management approaches for the sustainable development of agriculture-oriented cities.Taking a typical agriculture-dominant city(i.e.,Suihua)in Northeast China,we analyzed in detail the characteristics and causes of atmospheric pollution and evaluated the straw-burning prohibition using multisource data.The results showed a clear temporal pattern of air quality index(AQI)on an annual scale(i.e.,2015-April 2019),with two typical pollution periods occurring in late autumn and early spring.The large areas of concentrated straw burning at local and regional scales accounted for the first period(i.e.,October and November),while dust emissions and farming disturbances comprised the second period.The interannual variation in pollution periods among these years was large,showing similar trends from 2015 to 2017 and the postponed late-autumn pollution period in 2018.Our evaluation has shown that the prohibition effect of straw burning significantly improved air quality in 2018,with a reduction of 59%±88%in the PM2.5 concentrations in October and November compared to 2015–2017.However,From October to April of the following year,the improvement effect was not significant due to postponement of straw burning to February or March.Our analysis also highlighted the roles of meteorological conditions,Therefore,combined with the promotion of straw utilization,scientifically prescribed burning considering the burning amount and location,meteorological conditions and regional transportation should be implemented. | Lili Li Kun Wang Weiwei Chen Qingliang Zhao Lijuan Liu Wei Liu Yang Liu Junqiu Jiang Jiumeng Liu Mengduo Zhang | 2020 | Journal of Environmental Sciences2020，32，11： | 3 |
| 2 | A yearlong study of water-soluble organic carbon in Beijing II: Light absorption properties显示文摘 | Zhenyu Du Kebin He Yuan Cheng Fengkui Duan Yongliang Ma Jiumeng Liu Xiaolu Zhang Mei Zheng Rodney Weber | 2014 | Atmospheric Environment2014，，： | 1 |
| 3 | Brown carbon in the continental troposphere显示文摘 | Jiumeng Liu Eric Scheuer Jack Dibb Luke D. Ziemba Kenneth. L. Thornhill Bruce E. Anderson Armin Wisthaler Tomas Mikoviny J Jai Devi Michael Bergin Rodney J. Weber | 2014 | Geophys. Res. Lett2014，，6： | 1 |
| 4 | A yearlong study of water-soluble organic carbon in Beijing II: Light absorption properties显示文摘 | Zhenyu Du Kebin He Yuan Cheng Fengkui Duan Yongliang Ma Jiumeng Liu Xiaolu Zhang Mei Zheng Rodney Weber | 2014 | Atmospheric Environment2014，，： | 1 |
| 5 | Genome sequence and evolution of Betula platyphylla显示文摘Betula L.(birch)is a pioneer hardwood tree species with ecological,economic,and evolutionary importance in the Northern Hemisphere.We sequenced the Betula platyphylla genome and assembled the sequences into 14 chromosomes.The Betula genome lacks evidence of recent whole-genome duplication and has the same paleoploidy level as Vitis vinifera and Prunus mume.Phylogenetic analysis of lignin pathway genes coupled with tissue-specific expression patterns provided clues for understanding the formation of higher ratios of syringyl to guaiacyl lignin observed in Betula species.Our transcriptome analysis of leaf tissues under a time-series cold stress experiment revealed the presence of the MEKK1–MKK2–MPK4 cascade and six additional mitogen-activated protein kinases that can be linked to a gene regulatory network involving many transcription factors and cold tolerance genes.Our genomic and transcriptome analyses provide insight into the structures,features,and evolution of the B.platyphylla genome.The chromosome-level genome and gene resources of B.platyphylla obtained in this study will facilitate the identification of important and essential genes governing important traits of trees and genetic improvement of B.platyphylla. | Su Chen Yucheng Wang Lili Yu Tao Zheng Sui Wang Zhen Yue Jing Jiang Sapna Kumari Chunfang Zheng Haibao Tang Jun Li Yuqi Li Jiongjiong Chen Wenbo Zhang Hanhui Kuang Jon SRobertson Patrick XZhao Huiyu Li Shengqiang Shu Yordan SYordanov Haijiao Huang David MGoodstein Ying Gai Qi Qi JiuMeng Min ChunYan Xu SongBo Wang Guan-Zheng Qu Andrew HPaterson David Sankoff Hairong Wei Guifeng Liu Chuanping Yang | 2021 | Horticulture Research2021，8，1： | 1 |
| 6 | Brown carbon in the continental troposphere显示文摘 | LIU Jiumeng SCHEUER E DIBB J | 2014 | Geophysical Research Letters2014，41，6： | 1 |
| 7 | Influence of meteorological factors on open biomass burning at a background site in Northeast China显示文摘Biomass burning(BB)is a very important emission source that significantly adversely impacts regional air quality.BB produces a large number of primary organic aerosol(POA)and black carbon(BC).Besides,BB also provides many precursors for secondary organic aerosol(SOA)generation.In this work,the ratio of levoglucosan(LG)to organic carbon(OC)and the fire hotspots map was used to identify the open biomass burning(OBB)events,which occurred in two representative episodes,October 13 to November 30,2020,and April1 to April 30,2021.The ratio of organic aerosol(OA)to reconstructed PM_(2.5)concentration(PM_(2.5)^(*))increased with the increase of LG/OC.When LG/OC ratio is higher than 0.03,the highest OA/PM_(2.5)^(*)ratio can reach 80%,which means the contribution of OBB to OA is crucial.According to the ratio of LG to K^(+),LG to mannosan(MN)and the regional characteristics of Longfengshan,it can be determined that the crop residuals are the main fuel.The occurrence of OBB coincides with farmers’preferred choices,i.e.,burning biomass in“bright weather”.The“bright weather”refers to the meteorological conditions with high temperature,low humidity,and without rain.Meteorological factors indirectly affect regional biomass combustion pollution by influencing farmers’active choices. | Yulong Wang Linlin Liang Wanyun Xu Chang Liu Hongbing Cheng Yusi Liu Gen Zhang Xiaobin Xu Dajiang Yu Peng Wang Qingli Song Jiumeng Liu Yuan Cheng | 2024 | Journal of Environmental Sciences2024，，4： | 0 |
| 8 | Formation of secondary inorganic aerosol in a frigid urban atmosphere显示文摘Formation of secondary inorganic aerosol(SIA)was investigated during a six-month long heating season in Harbin,China.Enhanced sulfate formation was observed at high relative humidity(RH),with the same threshold RH(80%)for both colder and warmer measurement periods.Compared to wintertime results from Beijing,the threshold RH was considerably higher in Harbin,whereas the RH-dependent enhancement of sulfur oxidation ratio(SOR)was less significant.In addition,the high RH events were rarely encountered,and for other periods,the SOR were typically as low as~0.1.Therefore,the sulfate formation was considered inefficient in this study.After excluding the several cases with high RH,both SOR and the nitrogen oxidation ratio(NOR)exhibited increasing trends as the temperature increased,with the increase of NOR being sharper.The nitrate to sulfate ratio tended to increase with increasing temperature as well.Based on a semi-quantitative approach,this trend was attributed primarily to the temperature-dependent variations of precursors including SO_(2) and NO_(2).The influence of biomass burning emissions on SIA formation was also evident.With stronger impact of biomass burning,an enhancement in NOR was observed whereas SOR was largely unchanged.The different patterns were identified as the dominant driver of the larger nitrate to sulfate ratios measured at higher concentrations of fine particulate matter. | Yuan Cheng Qinqin Yu Jiumeng Liu Youwen Sun Linlin Liang Zhenyu Du Guannan Geng Wanli Ma Hong Qi Qiang Zhang Kebin He | 2022 | Frontiers of Environmental Science & Engineering2022，16，2： | 0 |
| 9 | Chemical components of PM_(2.5)in different seasons in Harbin,China显示文摘The seasonal characteristics of fine particulate matter(PM_(2.5))were investigated from October 2020 to April 2021(spreading fall,winter and spring)in Harbin,a city located in northeast China.The mass concentrations of PM_(2.5)in winter were significantly higher than those in fall and spring.Moreover,our results indicated that various aerosol species had obvious seasonality.The proportions of secondary components were higher in winter than other two seasons.In contrast,the ratios of nitrate to sulfate(NO_(3)^(-)/SO_(4)^(2-))showed lower levels in winter,which was because both the ratios of nitrogen dioxide to sulfur dioxide(NO_(2)/SO_(2))and the ratios of nitrogen oxidation ratio to sulfur oxidation ratio(NOR/SOR)exhibited lower values in winter than in fall and spring.With PM_(2.5)increased,the NO_(3)^(-)/SO_(4)^(2-)ratios showed increasing trends in all three seasons,which was mainly attributed to the increase of NOR/SOR ratios in fall and spring,and the increase of both NO_(2)/SO_(2)and NOR/SOR ratios in winter.This result highlighted that nitrate was more important than sulfate as a driver for the growth of PM_(2.5)during the period of heavy air pollution.Additionally,the sources of organic aerosol(OA)in different seasons were also distinctly different.Overall,the sum of biomass burning OA(BBOA)and secondary OA(SOA)contributed>70%of OA in three seasons.The fractional contributions of BBOA to total OA,notably,exhibited higher levels in fall and spring,because of intensive open agricultural fires.The SOA fractions in OA were larger in winter,likely due to higher relative humidity which facilitated the secondary for-mation.A large increase in the proportions of BBOA was observed during polluted days in fall and spring compared to clean days.In comparison,during heavily-polluted periods,secondary formation made a dominant contribution to organic matter in winter. | Qinqin Yu Jiumeng Liu Yingjie Zhong Xubing Cao Yulong Wang Yuan Cheng | 2023 | Particuology2023，，5： | 0 |
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