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显示样式: 排序: IF: - GO 导出
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Simultaneous measurement of methylamine in size-segregated aerosols and the gas phase Tellus B Chem. Phys. Meteorol. (IF 2.279) Pub Date : 2021-01-25 Aki Hirai; Kiyoshi Matsumoto
Abstract In order to improve our understanding of the origin and production processes of methylamine in the atmosphere and its contribution to the particulate WSON, simultaneous measurements of methylamine in size-segregated aerosols and the gas phase were conducted at a forested site in Yamanashi Prefecture, Japan, over one year. The concentration of the atmospheric methylamine that is the sum of
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Analysis of the temporal variability of CO2, CH4 and CO concentrations at Lamto, West Africa Tellus B Chem. Phys. Meteorol. (IF 2.279) Pub Date : 2020-12-26 Toure Dro Tiemoko; Michel Ramonet; Fidele Yoroba; Kobenan Benjamin Kouassi; Kouakou Kouadio; Victor Kazan; Claire Kaiser; François Truong; Cyrille Vuillemin; Marc Delmotte; Benoit Wastine; Phillipe Ciais
Abstract The 10-year observations of the atmospheric molar fractions of CO2, CH4 and CO in West Africa were analyzed using a high precision measurement of the Lamto (LTO) station (6°31 N and 5°02 W) in Côte d’Ivoire. At daily scale, high concentrations appear at night with significant peaks around 7 a.m. local time and minimum concentrations in the afternoon for CO2 and CH4. The CO concentrations show
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Characterisation of methane sources in Lutjewad, The Netherlands, using quasi-continuous isotopic composition measurements Tellus B Chem. Phys. Meteorol. (IF 2.279) Pub Date : 2020-11-03 Malika Menoud; Carina van der Veen; Bert Scheeren; Huilin Chen; Barbara Szénási; Randulph P. Morales; Isabelle Pison; Philippe Bousquet; Dominik Brunner; Thomas Röckmann
Abstract Despite the importance of methane for climate change mitigation, uncertainties regarding the temporal and spatial variability of the emissions remain. Measurements of CH4 isotopic composition are used to partition the relative contributions of different emission sources. We report continuous isotopic measurements during 5 months at the Lutjewad tower (north of the Netherlands). Time-series
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Greenhouse gas observation network design for Africa Tellus B Chem. Phys. Meteorol. (IF 2.279) Pub Date : 2020-10-19 Alecia Nickless; Robert J. Scholes; Alex Vermeulen; Johannes Beck; Ana López-Ballesteros; Jonas Ardö; Ute Karstens; Matthew Rigby; Ville Kasurinen; Karolina Pantazatou; Veronika Jorch; Werner Kutsch
Abstract An optimal network design was carried out to prioritise the installation or refurbishment of greenhouse gas (GHG) monitoring stations around Africa. The network was optimised to reduce the uncertainty in emissions across three of the most important GHGs: CO2, CH4, and N2O. Optimal networks were derived using incremental optimisation of the percentage uncertainty reduction achieved by a Gaussian
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Net carbon ecosystem exchange during 24 years in the Sorø Beech Forest – relations to phenology and climate Tellus B Chem. Phys. Meteorol. (IF 2.279) Pub Date : 2020-09-22 Kim Pilegaard; Andreas Ibrom
The carbon sequestration of plants through photosynthesis is responsible for removal of a substantial amount of the man-made CO2 emissions to the atmosphere. In recent years this so-called land-sink has removed about 30% of the man-made emissions to the atmosphere, with forests being the most important sinks. The land-sink is, however, vulnerable to changes in the environment, such as the atmospheric
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Increasing trends (2001–2018) in photochemical activity and secondary aerosols in Santiago, Chile Tellus B Chem. Phys. Meteorol. (IF 2.279) Pub Date : 2020-09-18 Camilo Menares; Laura Gallardo; Maria Kanakidou; Rodrigo Seguel; Nicolás Huneeus
Despite the decline in partially (PM10) and fully (PM2.5) inhalable particles observed in recent decades, Santiago in Chile shows high levels of particle and ozone pollution. Attainment plans have emphasized measures aimed at curbing primary and, to some extent, secondary particles, but little attention has been paid to photochemical pollution. Nevertheless, ozone hourly mixing ratios in Eastern Santiago
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Exploring controlling factors for sea spray aerosol production: temperature, inorganic ions and organic surfactants Tellus B Chem. Phys. Meteorol. (IF 2.279) Pub Date : 2020-09-15 Lærke Sloth Nielsen; Merete Bilde
This work addresses the production of aerosol particles from bursting of air bubbles at the water-air interface. Experiments were performed in a laboratory system designed to minimize bubble interactions. Air bubbles of an equivalent spherical radius of ∼3 mm were generated in both real and artificial seawater at temperatures of 0 and 19 °C respectively. Particle concentrations were measured and used
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Editorial Tellus B Chem. Phys. Meteorol. (IF 2.279) Pub Date : 2020-08-27
(2020). Editorial. Tellus B: Chemical and Physical Meteorology: Vol. 72, No. 1, pp. 1-1.
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Measurements of atmospheric Δ14CO2 along the R/V Xuelong cruise track from Zhongshan Station (Antarctica) to Shanghai Tellus B Chem. Phys. Meteorol. (IF 2.279) Pub Date : 2020-08-20 Xiangdong Zheng; Ping Ding; Zhengbin Han; Chende Shen; Kexin Liu; Jie Tang; Linggen Bian
Abstract During January–March 2011, 29 atmospheric Δ14CO2 samples were measured along the R/V Xuelong cruise track from Zhongshan Station (69.37°S, 76.38°E; Antarctica) to Shanghai. The extent of fossil fuel contamination in the samples was evaluated by comparison with contemporary hemispheric-scale averages of Δ14CO2, together with transport analysis and consideration of the δ13CO2 levels in the samples
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Aerosol carbonaceous, elemental and ionic composition variability and origin at the Siberian High Arctic, Cape Baranova Tellus B Chem. Phys. Meteorol. (IF 2.279) Pub Date : 2020-08-07 M. Manousakas; O. Popovicheva; N. Evangeliou; E. Diapouli; N. Sitnikov; N. Shonija; K. Eleftheriadis
Abstract Aerosol particles are major short-lived climate forcers, because of their ability to interact with incoming solar radiation. Therefore, addressing mean levels and sources of Arctic aerosols is of high importance in the battle against climate change, due to the Arctic amplification. In the Eastern Arctic, from Finland to Alaska, only one monitoring station exists (HMO Tiksi) and the levels
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Trajectory-based analysis on the source areas and transportation pathways of atmospheric particulate matter over Eastern Finland Tellus B Chem. Phys. Meteorol. (IF 2.279) Pub Date : 2020-08-04 Olli Väisänen; Liqing Hao; Annele Virtanen; Sami Romakkaniemi
Abstract In this study, we utilize aerosol mass spectrometer (AMS) and multi-angle absorption photometer (MAAP) measurements to assess the most predominant source regions of various atmospheric aerosol constituents transported to Eastern Finland. The non-refractory composition data from the AMS were measured during three intensive measurements campaigns in autumn 2012, 2014 and 2016, whereas the continuous
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Changes in aerosol size distributions over the Indian Ocean during different meteorological conditions Tellus B Chem. Phys. Meteorol. (IF 2.279) Pub Date : 2020-07-20 Jutta Kesti; Eija Asmi; Ewan J. O’Connor; John Backman; Krishnakant Budhavant; August Andersson; Sanjeev Dasari; Puppala S. Praveen; H. Zahid; Örjan Gustafsson
Abstract Aerosol emissions in South Asia are large. The emitted aerosols can travel significant distances and, during the Asian southwest monsoon especially, are prone to modification through cloud processing and wet scavenging while being transported. The scale of emissions and transport means that the global climate impact of these aerosols are sensitive to modification en route, but the process-level
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Summary of a workshop on extreme weather events in a warming world organized by the Royal Swedish Academy of Sciences Tellus B Chem. Phys. Meteorol. (IF 2.279) Pub Date : 2020-07-16 Deliang Chen; Henning Rodhe; Kerry Emanuel; Sonia I. Seneviratne; Panmao Zhai; Bert Allard; Peter Berg; Svante Björck; Ian A. Brown; Lars Bärring; Léon Chafik; Kaiqiang Deng; Marie-Jose Gaillard-Lemdahl; Magnus Hieronymus; Erik Kjellström; Hans W. Linderholm; Wilhelm May; Jens-Ove Näslund; Tinghai Ou; Anna Rutgersson; Erik Sahlee; Frederik Schenk; Jesper Sjolte; Moa K. Sporre; Anders Stigebrandt; Gesa
Abstract Climate change is not only about changes in means of climatic variables such as temperature, precipitation and wind, but also their extreme values which are of critical importance to human society and ecosystems. To inspire the Swedish climate research community and to promote assessments of international research on past and future changes in extreme weather events against the global climate
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Environmental control of land-atmosphere CO2 fluxes from temperate ecosystems: a statistical approach based on homogenized time series from five land-use types Tellus B Chem. Phys. Meteorol. (IF 2.279) Pub Date : 2020-06-29 Virginie Moreaux; Bernard Longdoz; Daniel Berveiller; Nicolas Delpierre; Eric Dufrêne; Jean-Marc Bonnefond; Christophe Chipeaux; Richard Joffre; Jean-Marc Limousin; Jean-Marc Ourcival; Katja Klumpp; Olivier Darsonville; Aurore Brut; Tiphaine Tallec; Eric Ceschia; Gérémy Panthou; Denis Loustau
Abstract We assembled homogenized long-term time series, up to 19 years, of measurements of net ecosystem exchange of CO2 (NEE) and its partitioning between gross primary production (GPP) and respiration (Reco) for five different ecosystems representing the main plant functional types (PFTs) in France. Part of these data was analyzed to determine the influence of the main environmental variables on
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Dissolved organic carbon in Alaskan Arctic snow: concentrations, light-absorption properties, and bioavailability Tellus B Chem. Phys. Meteorol. (IF 2.279) Pub Date : 2020-06-26 Yulan Zhang; Shichang Kang; Tanguang Gao; Michael Sprenger; Tingfeng Dou; Wei Han; Qi Zhang; Shiwei Sun; Wentao Du; Pengfei Chen; Junming Guo; Xiaoqing Cui; Mika Sillanpää
Abstract Dissolved organic carbon (DOC) plays an important role in the carbon cycle, radiative forcing, and biogeochemistry in cryospheric regions. In this study, concentrations, light-absorption properties and bioavailability of DOC from snow cover in Alaska were characterized. Results indicated that average concentrations of DOC in snow of Alaska (0.17 − 0.30 mg L−1) were lower than that found in
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Physical and chemical properties of aerosol particles and cloud residuals on Mt. Åreskutan in Central Sweden during summer 2014 Tellus B Chem. Phys. Meteorol. (IF 2.279) Pub Date : 2020-06-12 Emelie Linnéa Graham; Paul Zieger; Claudia Mohr; Ulla Wideqvist; Tabea Hennig; Annica M. L. Ekman; Radovan Krejci; Johan Ström; Ilona Riipinen
Abstract The size distribution, volatility and hygroscopicity of ambient aerosols and cloud residuals were measured with a differential mobility particle sizer (DMPS) and a volatility–hygroscopicity tandem differential mobility analyser (VHTDMA) coupled to a counterflow virtual impactor (CVI) inlet during the Cloud and Aerosol Experiment at Åre (CAEsAR) campaign at Mt. Åreskutan during summer 2014
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Deuterium excess and 17O-excess variability in meteoric water across the Pacific Northwest, USA Tellus B Chem. Phys. Meteorol. (IF 2.279) Pub Date : 2020-06-12 John Bershaw; Dougal D. Hansen; Andrew J. Schauer
Abstract High-precision triple oxygen isotope analysis of water has given rise to a novel second-order parameter, 17O-excess (often denoted as Δ17O), which describes the deviation from a reference relationship between δ18O and δ17O. This tracer, like deuterium excess (d-excess), is affected by kinetic fractionation (diffusion) during phase changes within the hydrologic cycle. However, unlike d-excess
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A 210-year tree-ring δ18O record in North China and its relationship with large-scale circulations Tellus B Chem. Phys. Meteorol. (IF 2.279) Pub Date : 2020-06-05 Lu Wang; Yu Liu; Qiang Li; Huiming Song; Qiufang Cai; Changfeng Sun; Congxi Fang; Ruoshi Liu
Abstract Tree-ring stable oxygen isotope (δ18OTR) demonstrates the enormous potential for revealing hydrological climate changes and large-scale atmospheric circulations. Here, we established the 210-year δ18OTR chronology of Pinus tabulaeformis Carr. in Baotou, southwest Inner Mongolia, North China. The regional precipitation δ18O (δ18OP) and June-July-August relative humidity (RHJJA) were the two
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Airborne survey of trace gases and aerosols over the Southern Baltic Sea: from clean marine boundary layer to shipping corridor effect Tellus B Chem. Phys. Meteorol. (IF 2.279) Pub Date : 2019-12-10 Marco Zanatta; Heiko Bozem; Franziska Köllner; Johannes Schneider; Daniel Kunkel; Peter Hoor; Julia de Faria; Andreas Petzold; Ulrich Bundke; Katherine Hayden; Ralf M. Staebler; Hannes Schulz; Andreas B. Herber
Abstract The influence of shipping on air quality over the Southern Baltic Sea was investigated by characterizing the horizontal and vertical distribution of aerosols and trace gases using airborne measurements in the summer of 2015. Generally, continental and anthropogenic emissions affected the vertical distribution of atmospheric pollutants, leading to pronounced stratification in and above the
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Ozone exchange within and above an irrigated Californian orchard Tellus B Chem. Phys. Meteorol. (IF 2.279) Pub Date : 2020-02-11 J.S. Brown; M.M. Shapkalijevski; M.C. Krol; T. Karl; H.G. Ouwersloot; A.F. Moene; E.G. Patton; J. Vilà-Guerau de Arellano
Abstract In this study, the canopy effects on the vertical ozone exchange within and above Californian orchard are investigated. We examined the comprehensive dataset obtained from the Canopy Horizontal Array Turbulence Study (CHATS). CHATS typifies a rural central Californian site, with O3 mixing ratios of less than 60 ppb and moderate NOx mixing ratios. The CHATS campaign covered a complete irrigation
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The main controls of the precipitation stable isotopes at Kathmandu, Nepal Tellus B Chem. Phys. Meteorol. (IF 2.279) Pub Date : 2020-02-10 Niranjan Adhikari; Jing Gao; Tandong Yao; Yulong Yang; Di Dai
Abstract Precipitation stable isotopes (2H and 18O) are adequately understood on their climate controls in the Tibetan Plateau, especially the north of Himalayas via about 30 years’ studies. However, knowledge of controls on precipitation stable isotopes in Nepal (the south of Himalayas), is still far from sufficient. This study described the intra-seasonal and annual variations of precipitation stable
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The effects of moisture sources and local parameters on the 18O and 2H contents of precipitation in the west of Iran and the east of Iraq Tellus B Chem. Phys. Meteorol. (IF 2.279) Pub Date : 2020-02-03 Hossein Mohammadzadeh; Javad Eskandari Mayvan; Mojtaba Heydarizad
Abstract Iran and Iraq face a water shortage crisis especially in the recent decade. Hence, the regions with high potential water resources are highly important to these countries. Precipitation sampling for 18O and 2H analyses was conducted in 10 stations in the west of Iran and 2 stations in the east of Iraq during this study. Studying precipitation and its moisture sources using the backward trajectories
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Deuterium–hydrogen ratios, electrical conductivity and nitrate for high-resolution dating of polar ice cores Tellus B Chem. Phys. Meteorol. (IF 2.279) Pub Date : 2020-04-09 Gisela Dreschhoff; Högne Jungner; Claude M. Laird
Abstract In order to support the very high time resolution required to observe short-term variations in nitrates and all other ions represented by electrical conductivity in polar ice, a Fourier transform infrared spectrometer was developed for measurement of deuterium concentration in ice samples, as an additional support for the timescale of ultra-high resolution. The portable instrument provided
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THE FIRST TWENTY YEARS (1994-2014) OF OZONE SOUNDINGS FROM RAPA NUI (27°S, 109°W, 51 M A.S.L.). Tellus B Chem. Phys. Meteorol. (IF 2.279) Pub Date : 2016-01-01 L Gallardo,A Henríquez,A M Thompson,R Rondanelli,J Carrasco,A Orfanoz-Cheuquelaf,P Velásquez
Ozone (O3) soundings have been performed on Easter Island or Rapa Nui (27°S, 23 109°W, 51 m a.s.l.) since 1994 as part of the Global Atmospheric Watch (GAW) Programme of the World Meteorological Organization (WMO). In this work, we analyze 260 soundings compiled over the period 1994-2014, and make the data available for the international community. We characterize O3 profiles over this remote area