A5007443211- Cryospheric studies and observations
- Climate change and permafrost
- Meteorological Phenomena and Simulations
- Atmospheric chemistry and aerosols
- Atmospheric aerosols and clouds
- Air Quality and Health Impacts
- Arctic and Antarctic ice dynamics
- Landslides and related hazards
- Winter Sports Injuries and Performance
- Climate variability and models
- Wind and Air Flow Studies
- Karst Systems and Hydrogeology
- Geology and Paleoclimatology Research
- Plant Water Relations and Carbon Dynamics
- Vehicle emissions and performance
- Physics and Engineering Research Articles
- Atmospheric and Environmental Gas Dynamics
- Atmospheric Ozone and Climate
- Noise Effects and Management
- Plant Ecology and Soil Science
- Precipitation Measurement and Analysis
- Solar Radiation and Photovoltaics
- Smart Materials for Construction
- Nanofluid Flow and Heat Transfer
- Wind Energy Research and Development
Universität Innsbruck
2014-2024
Abstract. The spatial structure and the progression speed of first ash layer from Icelandic Eyjafjallajökull volcano which reached Germany on 16/17 April is investigated remote sensing data numerical simulations. ceilometer network German Meteorological Service was able to follow over whole Germany. This turned out be a rather shallow only several hundreds metres thickness oriented slantwise in middle troposphere brought downward by large-scale sinking motion Southern Alps. Special Raman...
Abstract The flow and turbulence structure in the atmospheric boundary layer over complex mountainous terrain determines Earth–atmosphere interaction, that is, exchange of energy, mass, momentum between surface such free atmosphere. Numerical models for weather climate, even when operated at high or very grid resolution, are known to be deficient, leading inaccurate local forecasts (weather) scenarios (climate). nature reasons these deficiencies, however, difficult assess because systematic...
The mesoscale atmospheric model WRF is used over three Svalbard glaciers. simulations are done with a setup of the corresponding to state-of-the-art for polar conditions, Polar WRF, and it was validated using surface observations. ERA-Interim reanalysis boundary forcing nested smaller domains, 24 8 km, 2.7 km resolution. two-year period as well more detailed study 3 summer winter months. In addition sensitivity tests finer horizontal vertical resolution in layer different physics schemes...
Abstract. A series of major eruptions the Eyjafjallajökull volcano in Iceland started on 14 April 2010 and continued until end May 2010. The volcanic emissions moved over nearly whole Europe were observed first 16 Southern Germany with different remote sensing systems from ground space. Enhanced PM10 SO2 concentrations detected 17 at mountain stations (Zugspitze/Schneefernerhaus Schauinsland) as well Innsbruck by situ measurement devices. On 19 intensive vertical mixing advection along...
The scaled standard deviations of temperature and humidity are investigated in complex terrain. study area is a steep Alpine valley, with six measurement sites different slope, orientation roughness (i-Box experimental site, Inn Valley, Austria). Examined here several assumptions forming the basis Monin-Obukhov similarity theory (MOST), including constant turbulence fluxes height degree self-correlation between involved variables. Since basic for applicability MOST approach-horizontally...
Abstract. Although aerosols in the Arctic have multiple and complex impacts on regional climate, their removal due to deposition is still not well quantified. We combined meteorological, aerosol, precipitation, snowpack observations with simulations derive information about of sea salt components black carbon (BC) from November 2011 April 2012 at two locations close Ny-Ålesund, Svalbard. The dominating role contribution dust for composition atmospheric were reflected seasonal snowpack....
Abstract. Meteorological measurements were performed in a prominent ice cave (Eisriesenwelt, Austria) during full annual cycle. The data show the basic features of dynamically ventilated system with well distinguished winter and summer regime. calculated energy balance is largely determined by input long-wave radiation originating at host rock surface. On average turbulent fluxes withdraw from This more pronounced due to enhanced circulation lower humidity. During driving gradients reverse...
Abstract Kongsvegen is an Arctic glacier located in northwest Spitzbergen. We use meteorological observations made near the average equilibrium line of during decade 2001 to 2010 drive a energy and mass balance model. Average daily seasonal cycles are analyzed over course full decade, as well interannual variations parameters components. The calculated net radiation close zero sensible heat flux most important continuous source at surface. latent weak well. resultant constellation yields...
Abstract. State-of-the-art numerical snowpack models essentially rely on observational data for initialization, forcing, parametrization, and validation. Such are available in increasing amounts, but the propagation of related uncertainties simulation results has received rather limited attention so far. Depending their complexity, even small errors can have a profound effect simulations, which dilutes our confidence results. This paper aims at quantification overall fractional contributions...
"Valley-wind days" are characterized by synoptically undisturbed, clear-sky conditions, which lead to the formation of thermally-driven slope- and valley-wind circulations in mountain regions. A simple method is presented identify these conditions Inn Valley, Austria, using ERA-Interim geopotential height fields a index, calculated from measurements longwave incoming radiation, air temperature, humidity at single site on valley floor. As based identifying weak synoptic-scale flows clear...
Multiyear glaciometeorological data have been collected at about the equilibrium line of Kongsvegen glacier in Svalbard. During first summer investigation period, 0.6 m superimposed ice (SI) was built up because effective meltwater refreeze upon former surface. Thus winter accumulation is completely retained from runoff, and latent heat released equivalent to 27% July net radiation. This layer, as well part year's ice, disappeared during subsequent summer. Using a physically based snow...
We estimate annual anomalies of the surface mass balance glaciers on Svalbard for period 2000–2005 (six years), by calculating so‐called “satellite‐derived balance” ( B sat ) from time series satellite‐derived albedos. The method needs no other input variables. Surface albedos are extracted Moderate Resolution Imaging Spectroradiometer (MODIS)/Terra albedo product. validate MODIS comparing them with in situ measurements Kongsvegen, and we find a low root‐mean‐square error 0.04 higher‐quality...
Abstract. In order to investigate the spatial distribution of air pollutants in Inn valley (Tyrol, Austria) during wintertime, a joint field campaign three research projects ALPNAP (Monitoring and Minimisation Traffic-Induced Noise Air Pollution Along Major Alpine Transport Routes), INNAP (Boundary Layer Structure Valley high Pollution) INNOX (NOx-structure High was carried out January/February 2006. addition continuous ground based measurements, vertical profiles various meteorological...
Abstract. The Austrian RADiation monitoring network (ARAD) has been established to advance the national climate and support satellite retrieval, atmospheric modeling development of solar energy techniques. Measurements cover downward thermal infrared radiation using instruments according Baseline Surface Radiation Network (BSRN) standards. A unique feature ARAD is its vertical dimension five stations, covering an altitude range between about 200 m a.s.l (Vienna) 3100 a.s.l. (BSRN site...
Abstract Large‐scale modeling of glacier mass balance relies often on the output from regional climate models (RCMs). However, limited accuracy and spatial resolution RCM pose limitations simulations at subregional or local scales. Moreover, is still rarely available over larger regions for longer time periods. This study evaluates extent to which it possible derive reliable region‐wide estimates, using coarse (10 km) model forcing. Our data cover entire Svalbard archipelago one decade. To...
Abstract Diurnal cycles of turbulent sensible and latent heat fluxes are typically closely related to the diurnal solar irradiation under synoptically undisturbed clear‐sky conditions. In mountainous terrain, large variations can occur in topographic surface properties, which modify local radiation budget thus energy balance. Another characteristic terrain is local, thermally driven circulation systems, such as slope‐ valley‐wind system, equally affect exchange. Observations near‐surface...
We present data from two eddy covariance systems for determining the sensible and latent heat flux shear stress near earth's surface. One measures continuously since September 2010 close to village Ny-Ålesund, Svalbard, other one was located on Kongsvegen glacier a short period in April 2011. Two examples small-scale variability are discussed: surface external gravity waves associated with katabatic wind Broggerbreen few kilometres southwestern of an episode when at different measurement...
Glacier surface melt dynamics throughout Novaya Zemlya (NovZ) and Severnaya (SevZ) serve as a good indicator of ice mass ablation regional climate change in the Russian High Arctic. Here we report trends onset date (MOD) total days (TMD) by combining multiple resolution-enhanced active passive microwave satellite datasets analyze TMD correlations with local temperature sea extent. The glacier snowpack on SevZ melted significantly earlier (−7.3 days/decade) from 1992 to 2012 longer (7.7 1995...
Using luminescence to date the burial and exposure ages of rock surfaces has been a revolutionary new geochronological approach developed refined over past decade. Rock surface dating is based on principle that depth which signal bleached into dependent duration surface's sunlight. However, given recentness method development, effects basic light variables such as orientation incidence angle incoming bleaching have not tested. We designed an experiment in we controlled (t) granite sandstone...
Abstract. Ice caves are, similar to mountain glaciers, threatened by the warming climate. To better understand response of perennial ice in a changing climate, we analysed thermal characteristics sag-type cave Austrian Alps (Hundsalm cave), based on long-term temperature measurements for period 2008–2021. Observations show trend all parts as well distinct seasonal pattern with two main regimes, i.e., an open (winter) and closed (summer) period. During period, persistent stable stratification...