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| 1 | Preliminary multiproxy surface air temperature field reconstruction for China over the past millennium显示文摘We present the first millennial-length gridded field reconstruction of annual temperature for China, and analyze the reconstruction for spatiotemporal changes and associated uncertainties, based on a network of 415 well-distributed and accurately dated climatic proxy series.The new reconstruction method is a modified form of the point-by-point regression (PPR) approach.The main difference is the incorporation of the 'composite plus scale' (CPS) and 'Regularized errors-in-variables' (EIV) algorithms to allow for the assimilation of various types of the proxy data.Furthermore, the search radius is restricted to a grid size; this restriction helps effectively exclude proxy data possibly correlated with temperature but belonging to a different climate region.The results indicate that: 1) the past temperature record in China is spatially heterogenic, with variable correlations between cells in time; 2) the late 20th century warming in China probably exceeds mean temperature levels at any period of the past 1000 years, but the temperature anomalies of some grids in eastern China during the Medieval climate anomaly period are warmer than during the modern warming; 3) the climatic variability in the eastern and western regions of China was not synchronous during much of the last millennium, probably due to the influence of the Tibetan Plateau.Our temperature reconstruction may serve as a reference to test simulation results over the past millennium, and help to finely analyze the spatial characteristics and the driving mechanism of the past temperature variability.However, the lower reconstruction skill scores for some grid points underline that the present set of available proxy data series is not yet sufficient to accurately reconstruct the heterogeneous climate of China in all regions, and that there is the need for more highly resolved temperature proxies, particularly in the Tibetan Plateau. | SHI Feng YANG Bao Lucien Von GUNTEN | 2012 | Science China Earth Sciences2012，55，12： | 18 |
| 2 | Biochar colloids and their use in contaminants removal显示文摘In this study, we report on the extraction, characterization, and potential applications of colloidal biochar derived from pyrolyzed wood-an untapped source of carbonaceous particles.A series of characterizations was performed on biochar colloids to unravel their colloidal properties and surface chemistry through which it was found that they have a net negative charge and are stable between pH 3 and 10.Moreover,our initial toxicity tests showed that biochar colloids themselves are not toxic and they can be used in remediation applications,which led us to investigate(1)their copper sorption,a model inorganic contaminant,in a scenario that biochar colloids are released into the environment and(2)their potential use in organic pollutants adsorption and degradation.Copper sorption studies showed that biochar colloids have a copper sorption capacity as high as 22 mg g^(−1) in sub-ppm copper solutions.This increased the acute 48 h lethal concentration(LC50)of copper for Daphnia magna by 21 ppb,which is comparable to the previously reported effect by dissolved organic matter.Adsorption and degradation of methylene blue(MB),an often-used proxy for organic contaminants in water,were studied by coupling the biochar colloids to positively charged TiO_(2) nanoparticles and using it as a photocatalyst.The hybrid MB photodegradation efficiency was 21%higher than that of TiO_(2) nanoparticles alone.Enhancement of demethylation is proposed as the main degradation mechanism of MB,as confirmed by liquid chromatography-mass spectroscopy(LC/MS),and the positive impact of biochar colloids is ascribed to their abundant adsorption sites,which may facilitate MB adsorption and its photocatalytic degradation. | Salman Safari Konstantin von Gunten MdSamrat Alam Magdalena Hubmann Tamzin ABlewett Ziyi Chi Daniel SAlessi | 2019 | Biochar2019，1，2： | 4 |
| 3 | Reactions of chlorine with inorganic and organic compounds during water treatment—Kinetics and mechanisms: A critical review显示文摘 | Marie Deborde Urs von Gunten | 2007 | Water Research2007，，1： | 2 |
| 4 | Ozonation of drinking water: Part I. Oxidation kinetics and product formation显示文摘 | Urs von Gunten | 2003 | Water Research2003，，7： | 2 |
| 5 | A new rabbit model for the study of early brain injury after subarachnoid hemorrhage显示文摘 | Serge Marbacher Lukas Andereggen Volker Neuschmelting Hans Rudolf Widmer Michael von Gunten Jukka Takala Stephan M. Jakob Javier Fandino | 2012 | Journal of Neuroscience Methods2012，，2： | 2 |
| 6 | Ozonation of drinking water: Part II. Disinfection and by-product formation in presence of bromide, iodide or chlorine显示文摘 | Urs von Gunten | 2002 | Water Research2002，，7： | 2 |
| 7 | Current concepts in malignant bowel obstruction management显示文摘 | Eric Roeland Charles F. Gunten | 2009 | Current Oncology Reports2009，，4： | 2 |
| 8 | Chlorination of phenols:Kinetics and formation of chloroform显示文摘 | Gallard H Von Gunten U | 2002 | Environ Sci Technol2002，36，5： | 1 |
| 9 | The challenge of micropollutants in aquatic systems显示文摘 | SCHWARZENBACH R P ESCHER B FENNER K HOFSTETTER T B JOHNSON C A GUNTEN U V WEHRLI B | 2006 | Science2006，313，8： | 1 |
| 10 | Reactions of chlorine with inorganicand organic compounds during water treatment: Kinetics and mechanisms, A critical review显示文摘 | Debordea M Gunten U V | 2008 | Water Research2008，42，1： | 1 |
| 11 | Chlorination of natural organic matter:Kinetics of chlorination and of THM formation显示文摘 | Gallard H Von Gunten U | 2002 | Water Res2002，36，1： | 1 |
| 12 | Setting goals to maintain hop显示文摘 | Von Roenn JH Von Gunten CF | 2003 | J Clinical Oncology2003，21，3： | 1 |
| 13 | Ozonation of drinking water (part I ) oxidation kinetics and product formation显示文摘 | Von Gunten U | 2003 | Water Research2003，37，7： | 1 |
| 14 | Cognitive impact of neu- ronal pathology in the entorhinal cortex and CA1 field in Alzheimer' s disease显示文摘 | von Gunten A Kovari E Bussiere T | 2006 | Neurobiol Aging2006，27，： | 1 |
| 15 | Comparison of the efficiency of ·OH radical formation during ozonation and the advanced oxidation processes O3/H2O2 and UV/H2O2显示文摘 | Rosenfeldt E J Linden K G Canonica S von Gunten U | 2006 | Water Research2006，40，20： | 1 |
| 16 | Phototransformation of selected pharmaceuticals during UV treatment of drinking water显示文摘 | Canonica S Meunier L Von Gunten U | 2008 | Water Research2008，42，12： | 1 |
| 17 | Chlorination of natural organic matter: kinetics of chlorination and of THM for- mation 显示文摘 | GALLARD H von GUNTEN U | 2002 | Water Research2002，36，12： | 1 |
| 18 | Ozonation of drinking water(Ⅱ):Disinfection and by-product formation in presence of bromide,iodide or chlorine显示文摘 | von Gunten U | 2003 | Water Research2003，37，7： | 1 |
| 19 | Influence of carbonate on the ozone/hydrogen peroxide-basd advanced oxidation process for drinking water treatment 显示文摘 | Acero J Von Gunten U | 2000 | Ozone Science Engineering2000，22，： | 1 |
| 20 | Implications of sequential use of UV and ozone for drinking water quality显示文摘 | Meunier L Canonica S von Gunten U | 2006 | Water Research2006，40，9： | 1 |
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