Suche
Ergebnisse
-
Potential influence of overpressurized gas on the induced seismicity in the St. Gallen deep geothermal project (Switzerland)
(2019)Solid Earth DiscussionsIn July 2013, the city of St. Gallen conducted a deep geothermal project that aimed to exploit energy for district heating and generating power. A few days after an injection test and two acid stimulations that caused only minor seismicity, a gas kick forced the operators to inject drilling mud to combat the kick. Subsequently, multiple earthquakes were induced on a fault several hundred meters away from the well, including a ML 3.5 event ...Working Paper -
A Convolutional Neural Network for Classifying Cloud Particles Recorded by Imaging Probes
(2019)Atmospheric Measurement Techniques DiscussionsDuring typical field campaigns, millions of cloud particle images are captured with imaging probes. Our interest lies in classifying these particles in order to compute the statistics needed for understanding clouds. Given the large volume of collected data, this raises the need for an automated classification approach. Traditional classification methods that require extracting features manually (e.g. decision trees and support vector ...Working Paper -
Carbon/nitrogen interactions in European forests and semi-natural vegetation. Part I: Fluxes and budgets of carbon, nitrogen and greenhouse gases from ecosystem monitoring and modelling
(2019)Biogeosciences DiscussionsWorking Paper -
An urban ecohydrological model to quantify the effect of vegetation on urban climate and hydrology (UT&C v1.0)
(2019)Geoscientific Model Development DiscussionsIncreasing urbanization is likely to intensify the urban heat island effect, decrease outdoor thermal comfort and enhance runoff generation in cities. Urban green spaces are often proposed as a mitigation strategy to counteract these adverse effects and many recent developments of urban climate models focus on the inclusion of green and blue infrastructure to inform urban planning. However, many models still lack the ability to account ...Working Paper -
Estimates of mean residence times of phosphorus in commonly-considered inorganic soil phosphorus pools
(2019)Biogeosciences DiscussionsQuantification of turnover of inorganic soil phosphorus (P) pools is essential to improve our understanding of P cycling in soil-plant systems at different spatial scales. Turnover can be quantified using mean residence time (MRT), however, to date there is little information on MRT of P in soil P pools. We introduce an approach to quantify MRT of P in sequentially-extracted inorganic soil P pools using data from isotope exchange kinetic ...Working Paper -
Stratospheric ozone trends for 1985–2018: sensitivity to recent large variability
(2019)Atmospheric Chemistry and Physics DiscussionsThe Montreal Protocol has successfully prevented catastrophic losses of stratosphericozone, and signs of recovery are now evident. Nevertheless, recent work suggests that ozone in thelower stratosphere (<24 km) continued to decline over 1998–2016, offsetting recovery at higher altitudes and preventing a statistically significant increase in quasi-global (60◦S – 60◦N) total column ozone. In 2017, a large lower stratospheric ozone ...Working Paper -
A High Speed Particle Phase Discriminator (PPD-HS) for the classification of airborne particles, as tested in a continuous flow diffusion chamber
(2019)Atmospheric Measurement Techniques DiscussionsA new instrument, the High Speed Particle Phase Discriminator (PPD-HS) developed at the University of Hertfordshire, for sizing individual cloud hydrometeors and determining their phase is described herein. PPD-HS performs an in-situ analysis of the spatial intensity distribution of near forward scattered light for individual hydrometeors yielding shape properties. Discrimination of spherical and aspherical particles is based on an analysis ...Working Paper -
Modelling impacts of spatially variable erosion drivers on suspended sediment dynamics
(2019)Earth Surface Dynamics DiscussionsWorking Paper -
Glaciohydraulic seismic tremors on an Alpine glacier
(2019)The Cryosphere DiscussionsHydraulic processes impact viscous and brittle ice deformation. Water-driven fracturing as well as turbulent waterflow within and beneath glaciers radiate seismic waves which provide insights into otherwise hard-to-access englacial and subglacial environments. In this study, we analyze glaciohydraulic tremors recorded by four seismic arrays installed in different parts of Glacier de la Plaine Morte, Switzerland. Data were recorded during ...Working Paper