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Effects of vernal equinox solar eclipse on temperatures and wind directions in Switzerland
(2017)Atmospheric Chemistry and Physics DiscussionsThe vernal equinox total solar eclipse of 20 March 2015 produced a maximum occultation of 65.8 to 70.1 % over Switzerland during the morning hours (09:22 to 11:48 CET). Skies were generally clear over the Swiss Alps due to a persistent high-pressure band between the UK and Russia associated with a rather weak pressure gradient over the continent. To assess the effects of penumbral shading on near-surface meteorology across Switzerland, ...Working Paper -
The representation of solar cycle signals in stratospheric ozone. Part II: Analysis of global models
(2017)Atmospheric Chemistry and Physics DiscussionsWorking Paper -
Engaging inhabitants into energy transition in climate and energy model (CEM) regions: case studies of Freistadt, Ebreichsdorf and Baden
(2017)LINKS Working Paper ~ Engaging inhabitants into energy transition in climate and energy model (CEM) regionsWorking Paper -
Experimental observation of transient δ18O interaction between snow and advective airflow under various temperature gradient conditions
(2017)The Cryosphere DiscussionsStable water isotopes (δ18O) obtained from snow and ice samples of polar regions are used to reconstruct past climate variability, but heat and mass transport processes can affect the isotopic composition. Here we present an experimental study on the effect on the snow isotopic composition by airflow through a snow pack in controlled laboratory conditions. The influence of isothermal and controlled temperature gradient conditions on the ...Working Paper -
PathfinderTURB: an automatic boundary layer algorithm. Development, validation and application to study the impact on in-situ measurements at the Jungfraujoch
(2017)Atmospheric Chemistry and Physics DiscussionsContinuous observations of the vertical structure of the planetary boundary layer are invaluable for the validation of atmospheric transport models on the micro and meso scale. Lidar and ceilometer backscatter observations offer a robust technique with growing spatial coverage, but the obtained backscatter profiles need to be carefully translated into boundary layer parameters. Here we present the development of the PathfinderTURB algorithm ...Working Paper -
Advancing land surface model development with satellite-based Earth observations
(2016)Hydrology and Earth System Sciences DiscussionsThe land surface forms an essential part of the climatesystem. It interacts with the atmosphere through the exchangeof water and energy and hence influences weather andclimate, as well as their predictability. Correspondingly, theland surface model (LSM) is an essential part of any weatherforecasting system. LSMs rely on partly poorly constrainedparameters, due to sparse land surface observations.With theuse of newly available land surface ...Working Paper -
The response of Opalinus Clay when exposed to cyclic relative humidity variations
(2016)Solid Earth DiscussionsClay shale specimens were exposed to cyclic relative humidity variations to investigate the response of the material to natural environmental changes. Opalinus Clay, a clay shale chosen as host rock for nuclear waste disposal in Switzerland, was utilized. The specimens were exposed to stepwise relative humidity cycles where they were alternately allowed to equilibrate at 66 and 93% relative humidity. Principal strains were monitored ...Working Paper -
HEPPA-II model-measurement intercomparison project: EPP indirect effects during the dynamically perturbed NH winter 2008/2009
(2016)Atmospheric Chemistry and Physics DiscussionsWe compare simulations from three high-top (with upper lid above 120 km) and five medium-top (with upper lid around 80 km) atmospheric models with observations of odd nitrogen (NOx = NO + NO2), temperature, and carbon monoxide from seven satellite instruments (ACE-FTS on SciSat, GOMOS, MIPAS, and SCIAMACHY on Envisat, MLS on Aura, SABER on TIMED, and SMR on Odin) during the Northern Hemisphere (NH) polar winter 2008/2009. The models ...Working Paper -
How accurate are estimates of glacier ice thickness? Results from ITMIX, the Ice Thickness Models Intercomparison eXperiment
(2016)The Cryosphere DiscussionsWorking Paper -
Initiation of a major calving event on Bowdoin Glacier captured by UAV photogrammetry
(2016)The Cryosphere DiscussionsWorking Paper