Missing SO2 oxidant in the coastal atmosphere? – observations from high-resolution measurements of OH and atmospheric sulfur compounds Atmospheric Chemistry and Physics DOI 10.5194/acp-14-12209-2014 20 November 2014 Sulfuric acid plays a major role in the formation of aerosol particles and clouds. Measurements at the west coast of Ireland reveal that oxidation of SO2 by OH explains only 20%, on average, of H2SO4 formation in coastal marine air. Additional sources may be oxidation by Criegee intermediates produced photolytically and/or formation from SO3 instead of SO2 in the oxidation of dimethyl sulfide suggesting an important role of marine emissions in the self-cleaning power of the atmosphere. Read more
Historical impact of water infrastructure on water levels of the Mekong River and the Tonle Sap system Hydrology and Earth System Sciences DOI 10.5194/hess-18-4529-2014 17 November 2014 This paper analyses the historical water levels of the Mekong River and Tonle Sap system by comparing pre- and post-1991 daily observations from six stations along the Mekong mainstream from Chiang Saen (northern Thailand), to Stung Treng (Cambodia), and the Prek Kdam station on the Tonle Sap River. Read more
Changes in extreme regional sea surface height due to an abrupt weakening of the Atlantic meridional overturning circulation Ocean Science DOI 10.5194/os-10-881-2014 7 November 2014 As an extreme scenario of dynamical sea level changes, regional sea surface height (SSH) changes that occur in the North Atlantic due to an abrupt weakening of the Atlantic meridional overturning circulation (AMOC) are simulated. Two versions of the same ocean-only model are used to study the effect of ocean model resolution on these SSH changes. Read more
Gas emissions at the continental margin west of Svalbard: mapping, sampling, and quantification Biogeosciences DOI 10.5194/bg-11-6029-2014 6 November 2014 The authors mapped, sampled, and quantified gas emissions at the continental margin west of Svalbard in late summer 2012. They found that gas emissions occurred widespread between about 80 and 415 m water depth, which indicates that hydrate dissolution might only be one of several triggers for active hydrocarbon seepage in that area. Read more
Determining the focal mechanisms of the events in the Carpathian region of Ukraine Geoscientific Instrumentation, Methods and Data Systems DOI 10.5194/gi-3-229-2014 30 October 2014 The paper is devoted to mathematical modelling of propagation of seismic waves in inhomogeneous media. The trial and error method for determining the angles of orientation of fault plane and earthquake mechanism has been proposed. The graphic and trial and error approaches have been applied for determining the source parameters of earthquakes in seismically active region of Eastern Carpathian. Read more
Analytical approach for predicting fresh water discharge in an estuary based on tidal water level observations Hydrology and Earth System Sciences DOI 10.5194/hess-18-4153-2014 17 October 2014 In this study, the authors investigate the influence of river discharge on tidal wave propagation in the Yangtze estuary with specific attention to residual water level slope. Read more
An autonomous adaptive low-power instrument platform (AAL-PIP) for remote high-latitude geospace data collection Geoscientific Instrumentation, Methods and Data Systems DOI 10.5194/gi-3-211-2014 10 October 2014 This paper presents the development considerations and design for ground-based instrumentation that is being deployed on the East Antarctic Plateau along a 40° magnetic meridian chain to investigate interhemispheric magnetically conjugate geomagnetic coupling and other space-weather-related phenomena. Read more
Mapping the physico-chemical properties of mineral dust in western Africa: mineralogical composition Atmospheric Chemistry and Physics DOI 10.5194/acp-14-10663-2014 10 October 2014 In the last few years, several ground-based and airborne field campaigns have allowed the exploration of the properties and impacts of mineral dust in western Africa. This paper explores the synthesis of these observations to provide a large-scale quantitative view of the mineralogical composition and its variability according to source region and time after transport. Read more
Constraining CO2 emissions from open biomass burning by satellite observations of co-emitted species: a method and its application to wildfires in Siberia Atmospheric Chemistry and Physics DOI 10.5194/acp-14-10383-2014 1 October 2014 A method to constrain carbon dioxide (CO2) emissions from open biomass burning by using satellite observations of co-emitted species and a chemistry-transport model (CTM) is proposed and applied to the case of wildfires in Siberia. Read more
The origin of noise and magnetic hysteresis in crystalline permalloy ring-core fluxgate sensors Geoscientific Instrumentation, Methods and Data Systems DOI 10.5194/gi-3-201-2014 29 September 2014 In certain polycrystalline permalloy fluxgate sensors, a single phenomenon may cause both fluxgate noise and magnetic hysteresis; explain Barkhausen jumps, remanence and coercivity; and avoid domain denucleation. This phenomenon, domain wall reconnection, is presented as part of a theoretical model. Read more
