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  • 1
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    A catalog of reference genomes from the human microbiome (2010)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2010-05-22
    Description: The human microbiome refers to the community of microorganisms, including prokaryotes, viruses, and microbial eukaryotes, that populate the human body. The National Institutes of Health launched an initiative that focuses on describing the diversity of microbial species that are associated with health and disease. The first phase of this initiative includes the sequencing of hundreds of microbial reference genomes, coupled to metagenomic sequencing from multiple body sites. Here we present results from an initial reference genome sequencing of 178 microbial genomes. From 547,968 predicted polypeptides that correspond to the gene complement of these strains, previously unidentified ("novel") polypeptides that had both unmasked sequence length greater than 100 amino acids and no BLASTP match to any nonreference entry in the nonredundant subset were defined. This analysis resulted in a set of 30,867 polypeptides, of which 29,987 (approximately 97%) were unique. In addition, this set of microbial genomes allows for approximately 40% of random sequences from the microbiome of the gastrointestinal tract to be associated with organisms based on the match criteria used. Insights into pan-genome analysis suggest that we are still far from saturating microbial species genetic data sets. In addition, the associated metrics and standards used by our group for quality assurance are presented.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2940224/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2940224/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Human Microbiome Jumpstart Reference Strains Consortium -- Nelson, Karen E -- Weinstock, George M -- Highlander, Sarah K -- Worley, Kim C -- Creasy, Heather Huot -- Wortman, Jennifer Russo -- Rusch, Douglas B -- Mitreva, Makedonka -- Sodergren, Erica -- Chinwalla, Asif T -- Feldgarden, Michael -- Gevers, Dirk -- Haas, Brian J -- Madupu, Ramana -- Ward, Doyle V -- Birren, Bruce W -- Gibbs, Richard A -- Methe, Barbara -- Petrosino, Joseph F -- Strausberg, Robert L -- Sutton, Granger G -- White, Owen R -- Wilson, Richard K -- Durkin, Scott -- Giglio, Michelle Gwinn -- Gujja, Sharvari -- Howarth, Clint -- Kodira, Chinnappa D -- Kyrpides, Nikos -- Mehta, Teena -- Muzny, Donna M -- Pearson, Matthew -- Pepin, Kymberlie -- Pati, Amrita -- Qin, Xiang -- Yandava, Chandri -- Zeng, Qiandong -- Zhang, Lan -- Berlin, Aaron M -- Chen, Lei -- Hepburn, Theresa A -- Johnson, Justin -- McCorrison, Jamison -- Miller, Jason -- Minx, Pat -- Nusbaum, Chad -- Russ, Carsten -- Sykes, Sean M -- Tomlinson, Chad M -- Young, Sarah -- Warren, Wesley C -- Badger, Jonathan -- Crabtree, Jonathan -- Markowitz, Victor M -- Orvis, Joshua -- Cree, Andrew -- Ferriera, Steve -- Fulton, Lucinda L -- Fulton, Robert S -- Gillis, Marcus -- Hemphill, Lisa D -- Joshi, Vandita -- Kovar, Christie -- Torralba, Manolito -- Wetterstrand, Kris A -- Abouellleil, Amr -- Wollam, Aye M -- Buhay, Christian J -- Ding, Yan -- Dugan, Shannon -- FitzGerald, Michael G -- Holder, Mike -- Hostetler, Jessica -- Clifton, Sandra W -- Allen-Vercoe, Emma -- Earl, Ashlee M -- Farmer, Candace N -- Liolios, Konstantinos -- Surette, Michael G -- Xu, Qiang -- Pohl, Craig -- Wilczek-Boney, Katarzyna -- Zhu, Dianhui -- HHSN272200900017C/PHS HHS/ -- N01 AI30071/AI/NIAID NIH HHS/ -- U54 HG003273/HG/NHGRI NIH HHS/ -- U54 HG003273-04/HG/NHGRI NIH HHS/ -- U54 HG003273-04S1/HG/NHGRI NIH HHS/ -- U54 HG003273-05/HG/NHGRI NIH HHS/ -- U54 HG003273-05S1/HG/NHGRI NIH HHS/ -- U54 HG003273-05S2/HG/NHGRI NIH HHS/ -- U54 HG003273-06/HG/NHGRI NIH HHS/ -- U54 HG003273-06S1/HG/NHGRI NIH HHS/ -- U54 HG003273-06S2/HG/NHGRI NIH HHS/ -- U54 HG003273-07/HG/NHGRI NIH HHS/ -- U54 HG003273-08/HG/NHGRI NIH HHS/ -- U54 HG004973/HG/NHGRI NIH HHS/ -- U54 HG004973-01/HG/NHGRI NIH HHS/ -- U54 HG004973-02/HG/NHGRI NIH HHS/ -- U54-AI084844/AI/NIAID NIH HHS/ -- U54-HG003079/HG/NHGRI NIH HHS/ -- U54-HG003273/HG/NHGRI NIH HHS/ -- U54-HG004968/HG/NHGRI NIH HHS/ -- U54-HG004969/HG/NHGRI NIH HHS/ -- U54-HG004973/HG/NHGRI NIH HHS/ -- Canadian Institutes of Health Research/Canada -- New York, N.Y. -- Science. 2010 May 21;328(5981):994-9. doi: 10.1126/science.1183605.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20489017" target="_blank"〉PubMed〈/a〉
    Keywords: Bacteria/classification/genetics ; Bacterial Proteins/chemistry/genetics ; Biodiversity ; Computational Biology ; Databases, Genetic ; Gastrointestinal Tract/microbiology ; Genes, Bacterial ; Genetic Variation ; Genome, Archaeal ; *Genome, Bacterial ; Humans ; Metagenome/*genetics ; Metagenomics/methods/standards ; Mouth/microbiology ; Peptides/chemistry/genetics ; Phylogeny ; Respiratory System/microbiology ; *Sequence Analysis, DNA/standards ; Skin/microbiology ; Urogenital System/microbiology
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 2
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    Aryl hydrocarbon receptor antagonists promote the expansion of human hematopoietic stem cells (2010)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2010-08-07
    Description: Although practiced clinically for more than 40 years, the use of hematopoietic stem cell (HSC) transplants remains limited by the ability to expand these cells ex vivo. An unbiased screen with primary human HSCs identified a purine derivative, StemRegenin 1 (SR1), that promotes the ex vivo expansion of CD34+ cells. Culture of HSCs with SR1 led to a 50-fold increase in cells expressing CD34 and a 17-fold increase in cells that retain the ability to engraft immunodeficient mice. Mechanistic studies show that SR1 acts by antagonizing the aryl hydrocarbon receptor (AHR). The identification of SR1 and AHR modulation as a means to induce ex vivo HSC expansion should facilitate the clinical use of HSC therapy.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3033342/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3033342/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Boitano, Anthony E -- Wang, Jian -- Romeo, Russell -- Bouchez, Laure C -- Parker, Albert E -- Sutton, Sue E -- Walker, John R -- Flaveny, Colin A -- Perdew, Gary H -- Denison, Michael S -- Schultz, Peter G -- Cooke, Michael P -- ES004869/ES/NIEHS NIH HHS/ -- ES007685/ES/NIEHS NIH HHS/ -- ES04699/ES/NIEHS NIH HHS/ -- P42 ES004699/ES/NIEHS NIH HHS/ -- P42 ES004699-24/ES/NIEHS NIH HHS/ -- R01 ES004869/ES/NIEHS NIH HHS/ -- R01 ES004869-23/ES/NIEHS NIH HHS/ -- R01 ES007685/ES/NIEHS NIH HHS/ -- R01 ES007685-11/ES/NIEHS NIH HHS/ -- New York, N.Y. -- Science. 2010 Sep 10;329(5997):1345-8. doi: 10.1126/science.1191536. Epub 2010 Aug 5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA 92037, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20688981" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antigens, CD/analysis ; Antigens, CD34/analysis ; Aryl Hydrocarbon Hydroxylases/genetics/metabolism ; Cell Count ; Cell Lineage ; Cell Proliferation ; Cells, Cultured ; Cytochrome P-450 CYP1B1 ; Cytokines/pharmacology ; Glycoproteins/analysis ; Hematopoiesis ; *Hematopoietic Stem Cell Transplantation ; Hematopoietic Stem Cells/cytology/drug effects/metabolism/*physiology ; Humans ; Mice ; Mice, Inbred NOD ; Mice, SCID ; Multipotent Stem Cells/cytology/drug effects/physiology ; Peptides/analysis ; Purines/*metabolism/*pharmacology ; Receptors, Aryl Hydrocarbon/*antagonists & inhibitors/metabolism ; Signal Transduction ; Small Molecule Libraries ; Species Specificity ; Tetrachlorodibenzodioxin/pharmacology
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 3
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    Sequencing of Culex quinquefasciatus establishes a platform for mosquito comparative genomics (2010)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2010-10-12
    Description: Culex quinquefasciatus (the southern house mosquito) is an important mosquito vector of viruses such as West Nile virus and St. Louis encephalitis virus, as well as of nematodes that cause lymphatic filariasis. C. quinquefasciatus is one species within the Culex pipiens species complex and can be found throughout tropical and temperate climates of the world. The ability of C. quinquefasciatus to take blood meals from birds, livestock, and humans contributes to its ability to vector pathogens between species. Here, we describe the genomic sequence of C. quinquefasciatus: Its repertoire of 18,883 protein-coding genes is 22% larger than that of Aedes aegypti and 52% larger than that of Anopheles gambiae with multiple gene-family expansions, including olfactory and gustatory receptors, salivary gland genes, and genes associated with xenobiotic detoxification.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3740384/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3740384/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Arensburger, Peter -- Megy, Karine -- Waterhouse, Robert M -- Abrudan, Jenica -- Amedeo, Paolo -- Antelo, Beatriz -- Bartholomay, Lyric -- Bidwell, Shelby -- Caler, Elisabet -- Camara, Francisco -- Campbell, Corey L -- Campbell, Kathryn S -- Casola, Claudio -- Castro, Marta T -- Chandramouliswaran, Ishwar -- Chapman, Sinead B -- Christley, Scott -- Costas, Javier -- Eisenstadt, Eric -- Feschotte, Cedric -- Fraser-Liggett, Claire -- Guigo, Roderic -- Haas, Brian -- Hammond, Martin -- Hansson, Bill S -- Hemingway, Janet -- Hill, Sharon R -- Howarth, Clint -- Ignell, Rickard -- Kennedy, Ryan C -- Kodira, Chinnappa D -- Lobo, Neil F -- Mao, Chunhong -- Mayhew, George -- Michel, Kristin -- Mori, Akio -- Liu, Nannan -- Naveira, Horacio -- Nene, Vishvanath -- Nguyen, Nam -- Pearson, Matthew D -- Pritham, Ellen J -- Puiu, Daniela -- Qi, Yumin -- Ranson, Hilary -- Ribeiro, Jose M C -- Roberston, Hugh M -- Severson, David W -- Shumway, Martin -- Stanke, Mario -- Strausberg, Robert L -- Sun, Cheng -- Sutton, Granger -- Tu, Zhijian Jake -- Tubio, Jose Manuel C -- Unger, Maria F -- Vanlandingham, Dana L -- Vilella, Albert J -- White, Owen -- White, Jared R -- Wondji, Charles S -- Wortman, Jennifer -- Zdobnov, Evgeny M -- Birren, Bruce -- Christensen, Bruce M -- Collins, Frank H -- Cornel, Anthony -- Dimopoulos, George -- Hannick, Linda I -- Higgs, Stephen -- Lanzaro, Gregory C -- Lawson, Daniel -- Lee, Norman H -- Muskavitch, Marc A T -- Raikhel, Alexander S -- Atkinson, Peter W -- HHSN266200400001C/PHS HHS/ -- HHSN266200400039C/AI/NIAID NIH HHS/ -- HHSN266200400039C/PHS HHS/ -- N01-AI-30071/AI/NIAID NIH HHS/ -- N01AI30071/AI/NIAID NIH HHS/ -- ZIA AI000810-13/Intramural NIH HHS/ -- New York, N.Y. -- Science. 2010 Oct 1;330(6000):86-8. doi: 10.1126/science.1191864.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Center for Disease Vector Research, University of California Riverside, Riverside, CA 92521, USA. arensburger@gmail.com〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20929810" target="_blank"〉PubMed〈/a〉
    Keywords: Aedes/genetics ; Animals ; Anopheles gambiae/genetics ; Chromosome Mapping ; Chromosomes/*genetics ; Culex/classification/*genetics/physiology ; DNA Transposable Elements ; *Genes, Insect ; *Genome ; Insect Proteins/genetics/physiology ; Insect Vectors/genetics ; Molecular Sequence Data ; Multigene Family ; Phylogeny ; Receptors, Odorant/genetics ; Retroelements ; *Sequence Analysis, DNA
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 4
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    Modelling surface ozone during the 2003 heat-wave in the UK (2010)
    Copernicus
    Details
    Publication Date: 2010-08-27
    Description: The EMEP4UK modelling system is a high resolution (5×5 km2) application of the EMEP chemistry-transport model, designed for scientific and policy studies in the UK. We demonstrate the use and performance of the EMEP4UK system through the study of ground-level ozone (O3) during the extreme August 2003 heat-wave. Meteorology is generated by the Weather Research and Forecast (WRF) model, nudged every six hours with reanalysis data. We focus on SE England, where hourly average O3 reached up to 140 ppb during the heat-wave. EMEP4UK accurately reproduces elevated O3 and much of its day-to-day variability during the heat-wave. Key O3 precursors, nitrogen dioxide and isoprene, are less well simulated, but show generally accurate diurnal cycles and concentrations to within a factor of ~2–3 of observations. The modelled surface O3 distribution has an intricate spatio-temporal structure, governed by a combination of meteorology, emissions and photochemistry. A series of sensitivity runs with the model are used to explore the factors that influenced O3 levels during the heat-wave. Various factors appear to be important on different days and at different sites. Ozone imported from outside the model domain, especially the south, is very important on several days during the heat-wave, contributing up to 85 ppb. The effect of dry deposition is also important on several days. Modelled isoprene concentrations are generally best simulated if isoprene emissions are changed from the base emissions: typically doubled, but elevated by up to a factor of five on one hot day. We found that accurate modelling of the exact positions of nitrogen oxide and volatile organic compound plumes is crucial for the successful simulation of O3 at a particular time and location. Variations in temperature of ±5 K were found to have impacts on O3 of typically less than ±10 ppb.
    Print ISSN: 1680-7316
    Electronic ISSN: 1680-7324
    Topics: Geosciences
    Published by Copernicus on behalf of European Geosciences Union.
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  • 5
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    Review and parameterisation of bi-directional ammonia exchange between vegetation and the atmosphere (2010)
    Copernicus
    Details
    Publication Date: 2010-11-04
    Description: Current deposition schemes used in atmospheric chemical transport models do not generally account for bi-directional exchange of ammonia (NH3). Bi-directional exchange schemes, which have so far been applied at the plot scale, can be included in transport models, but need to be parameterised with appropriate values of the ground layer compensation point (χg), stomatal compensation point (χs) and cuticular resistance (Rw). We review existing measurements of χg, χs as well as Rw and compile a comprehensive dataset from which we then propose generalised parameterisations. χs is related to Γs, the non-dimensional ratio of [NH4+]apo and [H+]apo in the apoplast, through the temperature dependence of the combined Henry and dissociation equilibrium. The meta-analysis suggests that the nitrogen (N) input is the main driver of the apoplastic and bulk leaf concentrations of ammonium (NH4 apo
    Print ISSN: 1680-7316
    Electronic ISSN: 1680-7324
    Topics: Geosciences
    Published by Copernicus on behalf of European Geosciences Union.
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  • 6
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    Enhancement of the volcanogenic "bromine explosion" via reactive nitrogen chemistry (Kīlauea volcano, Hawai'i) (2010)
    Copernicus
    Details
    Publication Date: 2010-04-20
    Description: Since the first detection of bromine monoxide in volcanic plumes attention has focused on the atmospheric synthesis and impact of volcanogenic reactive halogens. We report here new measurements of BrO in the volcanic plume emitted from Kīlauea volcano – the first time reactive halogens have been observed in emissions from a hotspot volcano. Observations were carried out by ground-based Differential Optical Absorption Spectroscopy in 2007 and 2008 at Pu'u'O'o crater, and at the 2008 magmatic vent that opened within Halema'uma'u crater. BrO was readily detected in the Halema'uma'u plume (average column amount of 3×1015 molec cm−2) and its abundance was strongly correlated with that of SO2. However, anticorrelation between NO2 and SO2 (and BrO) abundances in the same plume strongly suggest an active role of NOx in reactive halogen chemistry. The calculated SO2/BrO molar ratio of ~1600 is comparable to observations at other volcanoes, although the BrO mixing ratio is roughly double that observed elsewhere. While BrO was not observed in the Pu'u'O'o plume this was probably merely a result of the detection limit of our measurements and based on understanding of the Summit and East Rift magmatic system we expect reactive halogens to be formed also in the Pu'u'O'o emissions. If this is correct then based on the long term SO2 flux from Pu'u'O'o we calculate that Kīlauea emits ~480 Mg yr−1 of reactive bromine and may thus represent an important source to the tropical Pacific troposphere.
    Electronic ISSN: 1680-7375
    Topics: Geosciences
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  • 7
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    Review and parameterisation of bi-directional ammonia exchange between vegetation and the atmosphere (2010)
    Copernicus
    Details
    Publication Date: 2010-04-20
    Description: Current deposition schemes used in atmospheric chemical transport models do not generally account for bi-directional exchange of ammonia (NH3). Bi-directional exchange schemes, which have so far been applied at the plot scale, can be included in transport models, but need to be parameterised with appropriate values of the stomatal compensation point (χs) and cuticular resistance (Rw). We here review existing measurements of χs as well as Rw and compile a comprehensive dataset from which we then propose generalised parameterisations. χs is related to Γs, the non-dimensional ratio of [NH4+]apo and [H+]apo in the apoplast, through the temperature dependence of the combined Henry and solubility equilibrium. The meta-analysis suggests that the nitrogen (N) input is the main driver of the apoplastic and bulk leaf concentrations of ammonium (NH+4 apo, NH+4 bulk). For managed ecosystems, the main source of N is fertilisation which is reflected in a peak value of χs a few days following application, but also alters seasonal values of NH+4 apo and NH+4 bulk. We propose a parameterisation for χs which includes peak values as a function of amount and type of fertiliser application which gradually decreases to a background value. The background χs is set based on total N input to the ecosystem as a yearly fertiliser application and N deposition (Ndep). For non-managed ecosystems, χs is parameterised based solely on the link with Ndep. For Rw we propose a general parameterisation as a function of atmospheric Relative Humidity (RH), incorporating a minimum value (R w(min)), which depends on the ratio of atmospheric acid concentrations (SO2, HNO3 and HCl) to NH3 concentrations. The parameterisations are based mainly on datasets from temperate locations in northern Europe making them most suitable for up-scaling in these regions (Unified EMEP model for example). In principle, the parameterisations should be applicable to other climates, though there is a need for more underpinning data, with the uncertainties being especially large for tropical and subtropical conditions.
    Electronic ISSN: 1680-7375
    Topics: Geosciences
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  • 8
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    Dry deposition of reactive nitrogen to European ecosystems: a comparison of inferential models across the NitroEurope network (2010)
    Copernicus
    Details
    Publication Date: 2010-12-01
    Description: Inferential models have long been used to determine pollutant dry deposition to ecosystems from measurements of air concentrations and as part of national and regional atmospheric chemistry and transport models, and yet models still suffer very large uncertainties. An inferential network of 55 sites throughout Europe for atmospheric reactive nitrogen (Nr) was established in 2007, providing ambient concentrations of gaseous NH3, NO2, HNO3 and HONO and aerosol NH4+ and NO3− as part of the NitroEurope Integrated Project. Network results providing modelled inorganic Nr dry deposition to the 55 monitoring sites are presented, using four existing dry deposition routines, revealing inter-model differences and providing ensemble average deposition estimates. Dry deposition is generally largest over forests in regions with large ambient NH3 concentrations, exceeding 30–40 kg N ha−1 yr−1 over parts of The Netherlands and Belgium, while some remote forests in Scandinavia receive less than 2 kg N ha−1 yr−1. Turbulent Nr deposition to short vegetation ecosystems is generally smaller than to forests due to reduced turbulent exchange, but also because NH3 inputs to fertilised, agricultural systems is limited by the presence of a substantial NH3 source in the vegetation, leading to periods of emission as well as deposition. Differences between models reach a factor 2–3 and are often greater than differences between monitoring sites. For soluble Nr gases such as NH3 and HNO3, non-stomatal pathways are responsible for most of the annual uptake over many surfaces, especially the non-agricultural land uses, but parameterisations of the sink strength vary considerably among models. For aerosol NH4+ and NO3−, discrepancies between theoretical models and field flux measurements lead to much uncertainty in dry deposition rates for fine particles (0.1–0.5 μm). The validation of inferential models at the ecosystem scale is best achieved by comparison with direct long-term micrometeorological Nr flux measurements, but too few such datasets are available, especially for HNO3 and aerosol NH4+ and NO3−.
    Electronic ISSN: 1680-7375
    Topics: Geosciences
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  • 9
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    Field inter-comparison of eleven atmospheric ammonia measurement techniques (2010)
    Copernicus
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    Publication Date: 2010-01-27
    Description: Eleven instruments for the measurement of ambient concentrations of atmospheric ammonia gas (NH3), based on eight different measurement methods were inter-compared above an intensively managed agricultural field in late summer 2008 in Southern Scotland. To test the instruments over a wide range of concentrations, the field was fertilised with urea midway through the experiment, leading to an increase in the average concentration from 10 to 100 ppbv. The instruments deployed included three wet-chemistry systems, one with offline analysis (annular rotating batch denuder, RBD) and two with online-analysis (Annular Denuder sampling with online Analysis, AMANDA; AiRRmonia), two Quantum Cascade Laser Absorption Spectrometers (a large-cell dual system; DUAL-QCLAS, and a compact system; c-QCLAS), two photo-acoustic spectrometers (WaSul-Flux; Nitrolux-100), a Cavity Ring Down Spectrosmeter (CRDS), a Chemical Ionisation Mass Spectrometer (CIMS), an ion mobility spectrometer (IMS) and an Open-Path Fourier Transform Infra-Red (OP-FTIR) Spectrometer. The instruments were compared with each other and with the average concentration of all instruments. An overall good agreement of hourly average concentrations between the instruments (R2〉0.84), was observed for NH3 concentrations at the field of up to 120 ppbv with the slopes against the average ranging from 0.67 (DUAL-QCLAS) to 1.13 (AiRRmonia) with intercepts of −0.74 ppbv (RBD) to +2.69 ppbv (CIMS). More variability was found for performance for lower concentrations (
    Print ISSN: 1867-1381
    Electronic ISSN: 1867-8548
    Topics: Geosciences
    Published by Copernicus on behalf of European Geosciences Union.
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