bluuebunny/crossref_metadata_2025_split huggingface dataset:
ChemInform Abstract: Cellulose Sulfonic Acid as a Green, Efficient, and Reusable Catalyst for Nazarov Cyclization of Unactivated Dienones and Pyrazoline Synthesis.
Authors: Daneshfar Zahra , Rostami Ali 
Published: April 2016

AbstractCellulose sulfonic acid efficiently catalyzes both the cyclization of dienones and the cyclization of in situ generated α,β‐unsaturated hydrazones.
ChemInform Abstract: Copper N‐Heterocyclic Carbene: A Catalyst for Aerobic Oxidation or Reduction Reactions.
Authors: Zhan Le‐Wu , Han Lei , Xing Ping , Jiang Biao 
Published: April 2016

AbstractCopper N‐heterocyclic carbene complexes are suitable catalysts for both the aerobic oxidation and the reduction reactions.
ChemInform Abstract: Visible‐Light‐Induced Photocatalysis of 1,1,1‐Trifluoro‐2‐iodoethane with Alkylalkenes and Silyl Enol Ethers.
Authors: Huang Meiwei , Li Lun , Zhao Zhi‐Gang , Chen Qing‐Yun , Guo Yong 
Published: April 2016

AbstractThe visible‐light‐induced photoredox reactions of alkylalkenes with trifluoroiodoethane involve a simultaneous introduction of a trifluoroethyl group and an iodine atom to both sides of the double bond of the alkenes, whereas the same reaction with aromatic silyl enol ethers leads to β‐trifluoromethyl ketones.
ChemInform Abstract: NMP and O2 as Radical Initiator: Trifluoromethylation of Alkenes to Tertiary β‐Trifluoromethyl Alcohols at Room Temperature.
Authors: Liu Chao , Lu Qingquan , Huang Zhiyuan , Zhang Jian , Liao Fan , Peng Pan , Lei Aiwen 
Published: April 2016

AbstractA novel strategy is developed to trigger CF3 radicals by using in situ generated peroxide in NMP under O2 or air as the radical initiator.
ChemInform Abstract: Rhodium(III)‐Catalyzed Direct Cyanation of Aromatic C—H Bond to Form 2‐(Alkylamino)benzonitriles Using N‐Nitroso as Directing Group.
Authors: Dong Jiawei , Wu Zhongjie , Liu Zhengyi , Liu Ping , Sun Peipei 
Published: April 2016

AbstractUsing N‐tosyl‐N‐cyanoaniline as CN source, the Rh‐catalyzed cyanation of N‐alkyl‐N‐nitroso‐anilines proceeds in modest to high yields.
ChemInform Abstract: Single‐Component Phosphinous Acid Ruthenium(II) Catalysts for Versatile C—H Activation by Metal‐Ligand Cooperation.
Authors: Zell Daniel , Warratz Svenja , Gelman Dmitri , Garden Simon J. , Ackermann Lutz 
Published: April 2016

AbstractThis method allows the chemo‐, site‐ and E/Z‐selective arylation of alkenes and arenes and represents the first application of well‐defined single‐component ruthenium catalysts for this type of reaction.
ChemInform Abstract: Copper‐Catalyzed Cyclopropanol Ring Opening C(sp3)—C(sp3) Cross‐Couplings with (Fluoro)Alkyl Halides.
Authors: Ye Zhishi , Gettys Kristen E. , Shen Xingyu , Dai Mingji 
Published: April 2016

AbstractThe title reaction affords β‐(fluoro)alkylated ketones under mild conditions and with good functional group compatibility.
ChemInform Abstract: Synthesis of o‐Aminophenols via a Formal Insertion Reaction of Arynes into Hydroxyindolinones.
Authors: Chen Zhilong , Wang Qiu 
Published: April 2016

AbstractA series of 1‐(2‐hydroxyphenyl)indolinones (V) is readily prepared by a fluoride‐mediated reaction of N‐hydroxyindolinones with benzyne precursor (II).
ChemInform Abstract: Synthesis of Ethers via Reaction of Carbanions and Monoperoxyacetals.
Authors: Kyasa ShivaKumar , Meier Rebecca N. , Pardini Ruth A. , Truttmann Tristan K. , Kuwata Keith T. , Dussault Patrick H. 
Published: April 2016

AbstractA series of monoperoxy acetals, especially those bearing a ‐Thp group, reacts with organo‐lithium and organo‐magnesium reagents to afford different types of ethers which, in part, are difficult to prepare by other methods.
ChemInform Abstract: Dimethyltin Dichloride Catalyzed Regioselective Alkylation of cis‐1,2‐Diols at Room Temperature.
Authors: Saikam Varma , Dara Saidulu , Yadav Mahipal , Singh Parvinder Pal , Vishwakarma Ram A. 
Published: April 2016

AbstractThe title reaction is carried out with the halides (II) and (V), generally under conditions A).
ChemInform Abstract: Lewis Acid Catalyzed Asymmetric Three‐Component Coupling Reaction: Facile Synthesis of α‐Fluoromethylated Tertiary Alcohols.
Authors: Aikawa Kohsuke , Kondo Daisuke , Honda Kazuya , Mikami Koichi 
Published: April 2016

AbstractIn the presence of a (S)‐DTBM‐SEGPHOS‐derived Pd‐catalyst a three‐component coupling giving α‐halodifuoromethylated α‐hydroxy esters with quaternary stereocenters.
ChemInform Abstract: 1,4‐Diazabicyclo[2.2.2]octane‐Promoted Aminotrifluoromethylthiolation of α,β‐Unsaturated Carbonyl Compounds: N‐Trifluoromethylthio‐4‐nitrophthalimide Acts as Both the Nitrogen and SCF3 Sources.
Authors: Xiao Qing , He Qijie , Li Juncheng , Wang Jun 
Published: April 2016

AbstractThe title reaction affords β‐amino ketones and esters (III) and (V) in good yields.
ChemInform Abstract: Diastereoselective Synthesis of Trisubstituted Cyclopropanes by Palladium‐Catalyzed Intramolecular Allylic Alkylation of α‐Aryl Esters.
Authors: Nemoto Tetsuhiro , Tsuruda Kazuki , Yoshida Mariko , Kono Masato , Hamada Yasumasa 
Published: April 2016

AbstractVarious trisubstituted cyclopropane derivatives are obtained by acid‐catalyzed intramolecular allylic carboxylation followed by a palladium‐catalyzed intramolecular allylic alkylation with an α‐aryl ester enolate.
ChemInform Abstract: Titanium and Zirconium Hydride‐Catalyzed Regioselective Isomerization of 1,4‐Dihydrofulvenes: Access to 1‐Substituted 1,2‐Dihydrofulvenes.
Authors: Joseph Jomy , Preethalayam Preethanuj , Radhakrishnan K. V. , Jaroschik Florian , Vasse Jean‐Luc 
Published: April 2016

AbstractThe Zr‐catalyzed double‐bond migration in 1,4‐dihydrofulvenes (VI) and (VIII), obtained by Zr‐catalyzed hydroalumination of pentafulvene (I) and a subsequent addition of aldehyde at low temperature, give rises to isomeric 1,2‐dihydrofulvenes (III) and (IX).
ChemInform Abstract: Highly Efficient Mechanochemical N‐Arylation of Amino Alcohols and Diamines with Cu0 Powder.
Authors: Martina Katia , Rinaldi Laura , Baricco Francesca , Boffa Luisa , Cravotto Giancarlo 
Published: April 2016

AbstractThe N‐arylation of amino alcohols and diamines with iodobenzene derivatives in a planetary ball mill is investigated.
ChemInform Abstract: 3,3′‐Diiodobinaphthol and 3,3′‐Diiodobiphenol Derivatives as Hypervalent Iodine Organocatalysts for the α‐Oxytosylation of Ketones.
Authors: Brenet Simon , Minozzi Clementine , Clarens Bastien , Amiri Lilia , Berthiol Florian 
Published: April 2016

AbstractA range of new families of hypervalent iodine oxidation organocatalysts is synthesized and tested for the α‐oxytosylation reaction of various ketones.
ChemInform Abstract: Copper(I)‐Catalyzed Intramolecular Trifluoromethylation of Methylenecyclopropanes.
Authors: Zhu Zi‐Zhong , Chen Kai , Yu Liu‐Zhu , Tang Xiang‐Ying , Shi Min 
Published: April 2016

AbstractThis copper(I)‐catalyzed ring‐opening‐closure/trifluoromethylation cascade proceeds through a radical process.
ChemInform Abstract: Recyclable Organocatalyst‐Promoted One‐Pot Asymmetric Synthesis of Spirooxindoles Bearing Multiple Stereogenic Centers.
Authors: Huang Xin , Pham Kenny , Yi Wenbin , Zhang Xiaofeng , Clamens Cecilia , Hyatt Jeremy H. , Jasinsk Jerry P. , Tayvah Uriel , Zhang Wei 
Published: April 2016

AbstractA recyclable fluorous bifunctional Cinchona alkaloid/thiourea‐catalyzed, one‐pot four‐component Michael/Mannich/cyclization sequence is developed for the asymmetric synthesis of spirooxindoles containing 2‐piperidinone and tetrahydropyridine rings.
ChemInform Abstract: One‐Pot Synthesis of Spirofluorenyl‐ and Spiroindeno[1,2‐b]indolyl Oxindoles via Sequential Inter‐ and Intramolecular Friedel—Crafts Reactions.
Authors: Lim Jin Woo , Moon Hye Ran , Kim Su Yeon , Kim Jae Nyoung 
Published: April 2016

AbstractMeta‐arylphenols and 2‐arylindoles undergo TiCl4‐mediated sequential inter‐ and intramolecular Friedel—Crafts reactions with isatins to give the title compounds.
ChemInform Abstract: Synthesis of α‐Benzyloxyamino‐γ‐butyrolactones via a Polar Radical Crossover Cycloaddition Reaction.
Authors: Cavanaugh Cortney L. , Nicewicz David A. 
Published: April 2016

AbstractTitle compounds are synthesized from simple oxime acids such as (II) and (VIII) and oxidizable alkenes using the Fukuzumi acridinium photooxidant and substoichiometric amounts of diphenyl disulfide as a redox‐active cocatalyst.
ChemInform Abstract: Silica Gel‐Promoted Practical Synthesis of Oxindole—Nitrones from Diazooxindoles and Nitrosoarenes under Solvent‐Free Conditions.
Authors: Zhang Yun‐Hao , Wu Ming‐Yue , Huang Wen‐Cai 
Published: April 2016

AbstractThis synthesis is advantageous with regards to operational simplicity, broad substrate scope and excellent yields.
ChemInform Abstract: Asymmetric Synthesis of 1H‐Pyrrol‐3(2H)‐ones from 2,3‐Diketoesters by Combination of Aldol Condensation with Benzilic Acid Rearrangement.
Authors: Sha Qiang , Arman Hadi , Doyle Michael P. 
Published: April 2016

AbstractA new two‐step method for the highly enantioselective synthesis of 1H‐pyrrol‐3(2H)‐ones is reported using 2,3‐diketoesters in asymmetric aldol reactions for the first time.
ChemInform Abstract: Palladium‐Catalyzed C‐2 C—H Heteroarylation of Chiral Oxazolines: Diverse Synthesis of Chiral Oxazoline Ligands.
Authors: Xi Tuo , Mei Yuncai , Lu Zhan 
Published: April 2016

AbstractA series of differently substituted chiral oxazolines is prepared through palladium‐catalyzed C—H functionalization.
ChemInform Abstract: Efficient Conversion of Carbon Dioxide at Atmospheric Pressure to 2‐Oxazolidinones Promoted by Bifunctional Cu(II)‐Substituted Polyoxometalate‐Based Ionic Liquids.
Authors: Wang Mei‐Yan , Song Qing‐Wen , Ma Ran , Xie Jia‐Ning , He Liang‐Nian 
Published: April 2016

AbstractVarious oxazole derivatives are synthesized by carboxylative cyclization of propargylic amines with CO2 using a Cu(II)‐substituted polyoxometalate‐based ionic liquid as catalyst.
ChemInform Abstract: One‐Pot Synthesis of 3,4‐Dihydropyridin‐2‐ones via Tandem Reaction of Blaise Reaction Intermediate and Acrylic Ester.
Authors: Meng Tuanjie , Liu Lantao , Jia Huiyi , Ren Lifeng , Feng Cuilan , Wang Xiaojuan , Zhao Wenxian 
Published: April 2016

AbstractA series of readily available nitriles, bromoacetic esters, and acrylic esters are employed to give access to various 3,4‐dihydropyridin‐2‐ones.
ChemInform Abstract: Access to a New Class of Synthetic Building Blocks via Trifluoromethoxylation of Pyridines and Pyrimidines.
Authors: Feng Pengju , Lee Katarzyna N. , Lee Johnny W. , Zhan Chengbo , Ngai Ming‐Yu 
Published: April 2016

AbstractA broad spectrum of differently substituted pyridines and some pyrimidines are treated with Togni reagent I (II) to produce derivatives bearing the important ‐O‐CF3 function.
ChemInform Abstract: Copper Promoted Synthesis of Substituted Quinolines from Benzylic Azides and Alkynes.
Authors: Luo Ching‐Zong , Gandeepan Parthasarathy , Wu Yun‐Ching , Chen Wei‐Chen , Cheng Chien‐Hong 
Published: April 2016

AbstractThis methodology allows the synthesis of quinolines in a simple step with excellent regioselectivity.
ChemInform Abstract: Mild and Efficient Silver(I) Triflate Catalyzed Synthesis of 2‐Aryl‐2,3‐dihydroquinolin‐4(1H)‐ones, and Their Antioxidant Activities.
Authors: Pandit Rameshwar Prasad , Sharma Kavita , Lee Yong Rok 
Published: April 2016

AbstractThe title quinolinones are efficiently obtained under mild reaction conditions starting from a variety of o‐aminoacetophenones and aryl aldehydes.
ChemInform Abstract: Silver(I)—N‐Heterocyclic Carbene Catalyzed Multicomponent Reactions: A Facile Synthesis of Multisubstituted Pyridines.
Authors: Kankala Shravankumar , Pagadala Ramakanth , Maddila Suresh , Vasam Chandra Sekhar , Jonnalagadda Sreekantha B. 
Published: April 2016

AbstractThe facile one‐pot reaction between ketones, aldehydes, malononitrile, and ammonium acetate allows the synthesis of multisubstituted and fused pyridines in high yields and with short reaction times.
ChemInform Abstract: Highly Regioselective Synthesis of 3,6‐Disubstituted 2‐(Methylsulfanyl)pyrimidin‐4(3H)‐ones.
Authors: dos Santos Josiane M. , da Silveira Alessandra S. , Souza Laura A. , Lobo Marcio M. , Bonacorso Helio G. , Martins Marcos A. P. , Zanatta Nilo 
Published: April 2016

AbstractThe title pyrimidinones are highly regioselectively obtained by cyclocondensation of trichloro‐alkenones with non‐symmetric substituted isothiourea sulfates under mild basic conditions.
ChemInform Abstract: Tandem Pd‐Catalyzed C—C Coupling/Recyclization of 2‐(2‐Bromoaryl)cyclopropane‐1,1‐dicarboxylates with Primary Nitro Alkanes.
Authors: Mikhaylov Andrey A. , Dilman Alexander D. , Novikov Roman A. , Khoroshutina Yulia A. , Struchkova Marina I. , Arkhipov Dmitry E. , Nelyubina Yulia V. , Tabolin Andrey A. , Ioffe Sema L. 
Published: April 2016

AbstractThe title process provides the first successful synthetic approach to 1H‐2,3‐benzoxazine 3‐oxides.
ChemInform Abstract: Gold(I)‐Catalyzed Highly Stereoselective Synthesis of Polycyclic Indolines: The Construction of Four Contiguous Stereocenters.
Authors: Yang Jin‐Ming , Li Peng‐Hua , Wei Yin , Tang Xiang‐Ying , Shi Min 
Published: April 2016

AbstractThe selective formation of either the oxa‐bridged‐ring system (III) or ring‐opened polycyclic indoline derivatives (II) is controlled by using different gold‐catalyst systems.
ChemInform Abstract: Synthesis and Evaluation of Functionalized Aminobenzoboroxoles as Potential Anticancer Agents.
Authors: Suman Pathi , Patel Bhawankumar P. , Kasibotla Agasthya V. , Solano Lucas N. , Jonnalagadda Subash C. 
Published: April 2016

AbstractStarting from o‐boronobenzaldehyde, various N‐alkylated aminobenzoboroxole derivatives are synthesized by a reductive amination protocol.
ChemInform Abstract: Magnesium‐Catalyzed Nitrile Hydroboration.
Authors: Weetman Catherine , Anker Mathew D. , Arrowsmith Merle , Hill Michael S. , Kociok‐Koehn Gabriele , Liptrot David J. , Mahon Mary F. 
Published: April 2016

AbstractMGDA is the most efficient precatalyst in the reductive hydroboration of aliphatic and aromatic nitriles with pinacolborane (II).
ChemInform Abstract: One‐Pot Homologation of Boronic Acids: A Platform for Diversity‐Oriented Synthesis.
Authors: Muir Calum W. , Vantourout Julien C. , Isidro‐Llobet Albert , Macdonald Simon J. F. , Watson Allan J. B. 
Published: April 2016

AbstractFormal homologation of sp2‐hybridized boronic acids, such as (I), (IV), and (VII) is achieved via cross‐coupling of boronic acids with conjunctive bromoaryl/vinyl MIDA boronates.
ChemInform Abstract: Reactions of 1,3‐Diketones with a Dipeptide Isothiazolidin‐3‐one: Toward Agents That Covalently Capture Oxidized Protein Tyrosine Phosphatase 1B.
Authors: Ruddraraju Kasi Viswanatharaju , Parsons Zachary D. , Llufrio Elizabeth M. , Frost Natasha L. , Gates Kent S. 
Published: April 2016

AbstractModel dipeptide (I) is prepared for a detailed title study.
ChemInform Abstract: Auxiliary‐Directed Pd‐Catalyzed γ‐C(sp3)—H Bond Activation of α‐Aminobutanoic Acid Derivatives.
Authors: Pasunooti Kalyan Kumar , Banerjee Biplab , Yap Terence , Jiang Yaojia , Liu Chuan‐Fa 
Published: April 2016

AbstractA new bidentate auxiliary derived from isoxazole‐3‐carboxamide, when placed on a primary amine compound, directs Pd‐catalyzed activation of inert γ‐C(sp3)—H bonds for C—C bond formation.
ChemInform Abstract: Viridicatumtoxins: Expanding on a Rare Tetracycline Antibiotic Scaffold.
Authors: Shang Zhuo , Salim Angela A. , Khalil Zeinab , Quezada Michelle , Bernhardt Paul V. , Capon Robert J. 
Published: April 2016

AbstractNew viridicatumtoxins C (IIb), D (III), E (IV), and F (V) as well as known viridicatumtoxins A (I) and B (IIa) are isolated from the inner tissues of an intertidal pulmonate mollusk (Siphonaria sp.).
ChemInform Abstract: New Naturally Occurring Diacetylenic Spiroacetal Enol Ethers from Artemisia selengensis.
Authors: Wang Kelvin D. G. , Wang Junsong , Xie Sai‐Sai , Li Zhong‐Rui , Kong Ling‐Yi , Luo Jun 
Published: April 2016

AbstractThe three new diacetylenic spiroacetal enol ethers, artemiselenols A‐C (Ia)‐(Ic), are isolated from the title plant.
ChemInform Abstract: Ca18.75Li10.5 [Al39N55]:Eu2+ — Supertetrahedron Phosphor for Solid‐State Lighting.
Authors: Wagatha Peter , Pust Philipp , Weiler Volker , Wochnik Angela S. , Schmidt Peter J. , Scheu Christina , Schnick Wolfgang 
Published: April 2016

AbstractCa18.75Li10.5 [Al39N55]:Eu2+ (0.5 mol%) is prepared by hot pressing of stoichiometric amounts of Li3N, CaH2, AlN, and EuF3 (Mo‐lined corundum crucibles in an isostatic press, 51.7 MPa N2, 1250 °C, 5 h).
ChemInform Abstract: Li4(NH2)3Cl Amide‐Chloride: A New Synthesis Route, and Hydrogen Storage Kinetic and Thermodynamic Properties.
Authors: Gamba N. S. , Arneodo Larochette P. , Gennari F. C. 
Published: April 2016

AbstractLi4(NH2)3Cl is prepared by ball milling of a stoichiometric mixture of LiNH2 and LiCl (400 rpm, 5 h) followed by ball milling with LiH to form a composite.
ChemInform Abstract: Recent Applications of Phosphane‐based Palladium Catalysts in Suzuki‐Miyaura Reactions Involved in Total Syntheses of Natural Products
Authors: Rossi Renzo , Bellina Fabio , Lessi Marco , Manzini Chiara , Marianetti Giulia , Perego Luca A. 
Published: April 2016

AbstractReview: 805 refs.
ChemInform Abstract: Recent Advances in Research of Natural and Synthetic Bioactive Quinolines
Authors: Chung Po‐Yee , Bian Zhao‐Xiang , Pun Ho‐Yuen , Chan Dessy , Chan Albert Sun‐Chi , Chui Chung‐Hin , Tang Johnny Cheuk‐On , Lam Kim‐Hung 
Published: April 2016

AbstractReview: 124 refs.
ChemInform Abstract: Recent Progress in Simulations of the Paramagnetic State of Magnetic Materials
Authors: Abrikosov I. A. , Ponomareva A. V. , Steneteg P. , Barannikova S. A. , Alling B. 
Published: April 2016

AbstractReview: first‐principles simulations of magnetic materials above the magnetic order‐disorder transition temperature with focus on 3D‐transition metals, their alloys and compdounds; 160 refs.
Scalability of Continuous Flow Production of Metal–Organic Frameworks
Authors: Rubio‐Martinez Marta , Hadley Trevor D. , Batten Michael P. , Constanti‐Carey Keri , Barton Tim , Marley Dylan , Mönch Andreas , Lim Kok‐Seng , Hill Matthew R. 
Published: April 2016

AbstractAchieving the large‐scale production of metal–organic frameworks (MOFs) is crucial for their utilization in applied settings. For many MOFs, quality suffers from large‐scale, batch reaction systems. We have developed continuous processes for their production which showed promise owing to their versatility and the high quality of the products. Here, we report the successful upscaling of this concept by more than two orders of magnitude to deliver unprecedented production rates and space‐time‐yields (STYs) while maintaining the product quality. Encouragingly, no change in the reaction parameters, obtained at small scale, was required. The production of aluminium fumarate was achieved at an STY of 97 159 kg m−3 day−1 and a rate of 5.6 kg h−1.
A Power Control Method to Save Energy for Wayside Energy Storage Systems in dc‐Electrified Railway System
Authors: KOBAYASHI HIROYASU , ASANO JUNICHI , SAITO TATSUHITO , KONDO KEIICHIRO 
Published: April 2016

SUMMARYThe introduction of wayside energy storage systems is effective for the recovery of regenerative brake energy in dc‐electrified railways. However, considering the cost of their deployment, it is preferable to maximize the energy saving effect with a minimum capacity of the energy storage devices (ESDs). In this paper, we propose a power control method that can improve the energy saving effect while managing the energy of the ESDs. The proposed method is implemented by controlling the filter capacitor voltage of the line side of the power converter for the ESDs depending on their energy and the line voltage of the overhead contact line to which they are connected. Next, the proposed method is verified by numerical simulations and experimental tests with a 1 kW class downsized model.
Wearable Potentiometric Sensors Based on Commercial Carbon Fibres for Monitoring Sodium in Sweat
Authors: Parrilla Marc , Ferré Jordi , Guinovart Tomàs , Andrade Francisco J. 
Published: April 2016

AbstractThe use of commercial carbon fibres (CCF) to build wearable potentiometric sensors for the real‐time monitoring of sodium levels in sweat during exercise is presented. CCF are an attractive substrate for building wearable electrochemical sensors because of their good electrical conductivity, chemical inertness, flexibility and mechanical resilience. In the first part of this work, the analytical performance of these novel potentiometric ion‐selective electrodes made with CCFs is presented. Then, through the incorporation of a solid‐contact reference electrode, the development of a complete miniaturized potentiometric cell with a Nernstian response (59.2±0.6 mV/log [Na+], N=4) is obtained. Finally, the cell is integrated into a wearable patch and attached onto the skin of an athlete. The analytical characterization of the wearable patch shows a near‐Nernstian response (55.9±0.8 mV/log [Na+], N=3) for sodium levels from 10−3 M to 10−1 M in artificial sweat, well within the physiological range of interest. The device shows low noise levels and very good stability (−0.4±0.3 mV ⋅ h−1). To improve the usability of the sensor in real scenarios, a calibration‐free approach is also explored. This platform opens new and attractive avenues for the generation of meaningful personalized physiological information that could be applied – among many other fields – in sports, nutrition and healthcare.
The assumption of uniform specific discharge: unsafe at any time?
Authors: Karlsen R. H. , Seibert J. , Grabs T. , Laudon H. , Blomkvist P. , Bishop K. 
Published: April 2016

AbstractNearby catchments in the same landscape are often assumed to have similar specific discharge (runoff per unit catchment area). Five years of streamflow from 14 nested catchments in a 68 km2 landscape was used to test this assumption, with the hypothesis that the spatial variability in specific discharge is smaller than the uncertainties in the measurement. The median spatial variability of specific discharge, defined as subcatchment deviation from the catchment outlet, was 33% at the daily scale. This declined to 24% at a monthly scale and 19% at an annual scale. These specific discharge differences are on the same order of magnitude as predicted for major land‐use conversions or a century of climate change. Spatial variability remained when considering uncertainties in specific discharge, and systematic seasonal patterns in specific discharge variation further provide confidence that these differences are more than just errors in the analysis of catchment area, rainfall variability or gauging. Assuming similar specific discharge in nearby catchments can thus lead to spurious conclusions about the effects of disturbance on hydrological and biogeochemical processes. Copyright © 2016 John Wiley & Sons, Ltd.