A5050427264- Fire effects on ecosystems
- Forest ecology and management
- Landslides and related hazards
- Atmospheric and Environmental Gas Dynamics
- Atmospheric chemistry and aerosols
- Plant Water Relations and Carbon Dynamics
- Atmospheric Ozone and Climate
- Meteorological Phenomena and Simulations
- Forest Biomass Utilization and Management
- Remote Sensing in Agriculture
- Tree-ring climate responses
- Cryospheric studies and observations
- Soil Moisture and Remote Sensing
- Species Distribution and Climate Change
- Protist diversity and phylogeny
- Urban Heat Island Mitigation
- Leaf Properties and Growth Measurement
- Solar-Powered Water Purification Methods
- Air Quality and Health Impacts
- Slime Mold and Myxomycetes Research
- Membrane Separation Technologies
- Fire dynamics and safety research
- Ecology and Vegetation Dynamics Studies
- Precipitation Measurement and Analysis
- Air Quality Monitoring and Forecasting
Technical University of Munich
2009-2020
The University of Melbourne
2020
Institute for Advanced Study
2018
Climate change is expected to exacerbate the frequency of drought-induced tree mortality world-wide. To better predict associated species composition and forest dynamics on various scales develop adequate adaptation strategies, more information mechanisms driving often observed patchiness die-back needed. Although forest-edge effects may play an important role within given context, only few corresponding studies exist. Here, we investigate regional Scots pine in Franconia, Germany, after a...
Climate change has affected plant phenology; increasing temperatures are associated with advancing first flowering dates. The impact on duration, however, rarely been studied. In this study, we analysed dates and durations from a 27 year dataset of weekly flower observations 232 species the island Guernsey in English Channel. aim study was to explore variation trends relationships between dates, duration temperature. We specifically looked for evidence that traits, such as life forms...
Fog harvesting techniques for water collection have been implemented successfully worldwide several decades. However, at locations with high wind speeds, traditional installations require maintenance efforts endangering the sustainability of projects. Furthermore, efficiency fog meshes and quality in field are key questions implementation large-scale facilities. This study presents a novel, durable collector design investigates yield (fog + rain) inorganic different potential test site...
Continuous formaldehyde measurements were performed at the high-altitude GAW site Environmental Research Station Schneefernerhaus for more than one year. This unique dataset was analyzed daily and seasonal variation influence of large-scale synoptic conditions air-mass origin on observed concentrations. The average course exhibited maxima in afternoon minima night, however differing between seasons. general strong with values winter, spring, summer, fall 0.350, 0.529, 0.986, 0.429 ppbv,...
Field measurements of surface dead fine fuel moisture content (FFMC) are integral to wildfire management, but conventional measurement techniques limited. Automated sticks offer a potential solution, providing standardised, continuous and real-time measure moisture. As such, they used as an analogue for their performance in this context has not been widely evaluated. We assessed the ability automated predict FFMC across range forest types. combined concurrent stick from 27 sites (570...
With recent climate changes, Scots pine (Pinus sylvestris L.) forests have been affected by die-off events. Assisted migration of adapted provenances mitigates drought impacts and promotes forest regeneration. Although suitable are difficult to identify traditional ecophysiological techniques, which time consuming invasive, plant water status can be easily assessed infrared thermography. Thus, we examined the stress responses 2-year-old potted seedlings from six (Bulgaria, France, Germany,...
Abstract Among soil-inhabiting protists, myxomycetes stand out by their macroscopic fructifications which have allowed studies on ecology and distribution for more than two hundred years. One of the most distinct ecological guilds in are nivicolous or “snowbank” myxomycete species, produce fruit bodies at edge melting snowbanks spring. Relationship between occurrence myxamoebae remain unknown. In this study we used modern molecular techniques, direct DNA amplification from soil extracts (NGS...
Within the CO2 time series measured at Environmental Research Station Schneefernerhaus (UFS), Germany, as part of Global Atmospheric Watch (GAW) program, pollution episodes are traced back to local and regional emissions, identified by δ13C(CO2) well ratios CO CH4 mixing ratios. Seven sudden enhancements in tropospheric ratio measurements mixing/isotopic during five winter months from October 2012 February 2013. The short-term variations closely correlated with changes ratios, achieving mean...
Rain properties vary spatially and temporally for several reasons. In particular, rain types (convective stratiform) affect the drop size distribution (DSD). It has also been established that local weather conditions are influenced by large-scale circulations. However, effect of these circulations on microstructures not sufficiently addressed. Based DSD measurements from 16 disdrometers located in Lausanne, Switzerland, we present evidence differs among general patterns (GWLs). GWLs were...
Abstract. From the rural Global Atmosphere Watch (GAW) site Hohenpeissenberg in pre-alpine area of southern Germany, a data set 24 C2–C8 non-methane hydrocarbons over period 7 years was analyzed. Receptor modeling performed by positive matrix factorization (PMF) and resulting factors were interpreted with respect to source profiles photochemical aging. Differing from other studies, no direct attribution intended because, due chemistry along transport, mass conservation receptor is not given....
Abstract. Dead fine fuel (e.g., litter) moisture content is an important parameter for both forest fire and ecological applications as it related to ignitability, behavior soil respiration. Real-time availability of this value would thus be a great benefit risk management prevention. However, the comprehensive literature review in paper shows that there no easy-to-use method automated measurements available. This study investigates applicability four different sensor types (permittivity...
Abstract. Forest fire danger rating based on sparse meteorological stations is known to be potentially misleading when assigned larger areas of complex topography. This case study examines several indices data from two at different elevations during a major drought period. was caused by persistent high pressure system, inducing pronounced temperature inversion and its associated thermal belt with much warmer, dryer conditions in intermediate elevations. Thus, massive drying fuels, leading...
This study presents continuous atmospheric CO2 and δ13C measurements by wavelength-scanned cavity ring down spectroscopy (Picarro G1101-i) at the high-mountain station Schneefernerhaus, Germany. values were post-corrected for methane water spectral interferences using accompanying of CH4 H2O, in dried air, respectively. The best precision ±0.2‰ ±4 ppb was obtained with an integration time about 1 hour 2 hours CO2. seasonality studied fitting background curves a complete 2-year period....
Fine fuel moisture content is a key parameter in fire danger and behaviour applications. For modelling purposes, equilibrium (EMC) curves are an important input parameter. This paper provides EMC data for central European fuels adds methodological considerations that can be used to improve existing test procedures. Litter samples of Norway spruce (Picea abies (L.) Karst.), Scots pine (Pinus sylvestris L.), beech (Fagus sylvatica L.) pedunculate oak (Quercus robur were subjected three...
Along with the global climate change, there is an increasing interest for its effect on phenological patterns such as start and end of growing season. Scientific digital webcams are used this purpose taking every day one or more images from same natural motive showing example trees grassland sites. To derive webcam images, regions manually defined these by expert subsequently a time series percentage greenness derived analyzed respect to structural changes. While standard approach leads...
Abstract. To assist atmospheric monitoring at high-alpine sites, a statistical approach for distinguishing between the dominant air masses was developed. This based on principal component analysis using five gas-phase and two meteorological variables. The focused Schneefernerhaus site Zugspitze Mountain, Germany. investigated year divided into 2-month periods, which repeated. Using 33.3 % 66.6 percentiles of first components, nine mass regimes were defined. These interpreted with respect to...
Abstract. Dead fine fuel (e.g. litter) moisture content is an important parameter for both forest fire and ecological applications as it related to ignitability, behavior well soil respiration. However, the comprehensive literature review in this paper shows that there no easy-to-use method automated measurements available. This study investigates applicability of four different sensor types (permittivity electrical resistance measuring principles) measurement. Comparisons were made manual...