A5079064197- Atmospheric and Environmental Gas Dynamics
- Atmospheric chemistry and aerosols
- Species Distribution and Climate Change
- Plant and animal studies
- Remote Sensing in Agriculture
- Meteorological Phenomena and Simulations
- Atmospheric Ozone and Climate
- Allergic Rhinitis and Sensitization
- Land Use and Ecosystem Services
- Climate variability and models
- Lichen and fungal ecology
- Cryospheric studies and observations
- Atmospheric aerosols and clouds
- Spectroscopy and Laser Applications
- Ecology and Vegetation Dynamics Studies
- Insects and Parasite Interactions
- Air Quality and Health Impacts
- Animal Ecology and Behavior Studies
- Plant Reproductive Biology
- Hydrology and Drought Analysis
- Remote Sensing and LiDAR Applications
- Entomological Studies and Ecology
- Animal and Plant Science Education
- Indoor Air Quality and Microbial Exposure
- Soil Carbon and Nitrogen Dynamics
Technical University of Munich
2017-2025
University of Chinese Academy of Sciences
2021
Abstract A paper published in Global Change Biology 2006 revealed that phenological responses 1971–2000 matched the warming pattern Europe, but a lack of chilling and adaptation farming may have reversed these findings. Therefore, for 1951–2018 corresponding data set, we determined changes as linear trends analysed their variation by plant traits/groups, across season time well attribution to following IPCC methodology. Although spring summer phases wild plants advanced less (maximum...
Droughts during the growing season are projected to increase in frequency and severity Central Europe future. Thus, area-wide monitoring of agricultural drought this region is becoming more important. In context, it essential know where when vegetation growth primarily water-limited whether remote sensing-based indices can detect these areas. To answer questions, we conducted a correlation analysis between Normalized Difference Vegetation Index (NDVI) Land Surface Temperature (LST) within...
Abstract Background The implementation of emission mitigation policies in Europe over the last two decades has generally improved air quality, which resulted lower aerosol particle mass, number, and black carbon mass concentration. However, little is known whether decreasing concentrations at a lower-altitude level can be observed free troposphere (FT), an important layer atmosphere, where particles have longer lifetime may affect climate dynamics. In this study, we used data from...
Abstract. A continuous, 36-year measurement composite of atmospheric carbon dioxide (CO2) at three locations on Mount Zugspitze, Germany, was studied. For a comprehensive site characterization analyses CO2 weekly periodicity and diurnal cycle were performed to provide evidence for local sources sinks, showing clear weekday weekend differences, with dominantly higher levels during the daytime weekdays. case study trace gases (CO NO) passenger numbers summit indicate that close by did not...
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...
Anthropogenic carbon dioxide (CO2) emissions mainly come from cities and their surrounding areas. Thus, continuous measuring of CO2 in urban areas is great significance to studying human emissions. We developed a compact, precise, self-calibrated in-situ CO2/H2O sensor based on TDLAS (tunable diode laser absorption spectroscopy), WMS (wavelength modulation VCSEL (vertical-cavity surface-emitting laser). Multi-harmonic detection utilized improve the precision both measurements 0.02 ppm for...
Climate impacts on the pollen season are well-described however less is known how frequently atmospheric transport influences start of season. Based long-term phenological flowering and airborne data (1987-2017) for six stations seven taxa across Bavaria, Germany, we studied changes in season, compared dates to determine sources, analyzed likelihood by HYSPLIT back trajectories. Species advanced their more early spring (e.g., Corylus Alnus up 2 days yr-1) than mid (Betula, Fraxinus, Pinus);...
Abstract. Critical data selection is essential for determining representative baseline levels of atmospheric trace gases even at remote measurement sites. Different techniques have been used around the world, which could potentially lead to reduced compatibility when comparing from different stations. This paper presents a novel statistical method named adaptive diurnal minimum variation (ADVS) based on CO2 patterns typically occurring elevated mountain Its capability and applicability were...
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....
Atmospheric CO2 measurements are important in understanding the global carbon cycle and studying local sources sinks. Ground satellite-based provide information on different temporal spatial scales. However, compatibility of such at single sites is still underexplored, applicability consistent data processing routines remains a challenge. In this study, we present an inter-comparison among representative surface column-averaged records derived from continuous in-situ measurements,...
Low-cost phenological experiments with cut twigs are increasingly used to study bud development in response spring warming and photoperiod. However, a broader variety of species needs be tackled particular the influence insufficient winter chilling deserves more attention. Therefore, we investigated if how requirements can efficiently by this low-tech approach could successfully implemented as citizen science or school project. We conducted an experiment on burst leaf Corylus avellana L....
Contemporary climate change leads to earlier spring phenological events in Europe. In forests, which overstory strongly regulates the microclimate beneath, it is not clear if further equally shifts timing of leaf unfolding for over- and understory main deciduous forest species, such as Fagus sylvatica L. (European beech). Furthermore, known yet how this vertical (mis)match—the difference between understory—affects remotely sensed satellite signal. To investigate this, we disentangled start...
The precipitation diurnal cycle (PDC) varies with the season and location. Its link to large-scale weather circulations has been studied in different regions. However, comparable information is lacking for Central Europe. Two decades of hourly data were combined records objective patterns over Germany, focusing on general atmospheric wind directions (WD). PDC characterized by frequency average amount precipitation. generally two peaks: one morning other afternoon. peak small compared that...
Abstract Phenology serves as a major indicator of ongoing climate change. Long-term phenological observations are critically important for tracking and communicating these changes. The observation network across Germany is operated by the National Meteorological Service with contribution from volunteering activities. However, number observers has strongly decreased last decades, possibly resulting in increasing uncertainties when extracting reliable information map interpolation. We studied...
Meteorological conditions and the distribution of pollen sources are two most decisive factors influencing concentration airborne grass pollen. However, knowledge about land-use types, their potential emission, importance local remains limited. In this study, wild concentrations from 27 stations in Bavaria, Germany, were linked to within a 30 km radius. Agricultural derived InVeKos database, which contains detailed information on agricultural types spatial distribution. Non-agricultural...
Weather explains the decline and increase in insect biomass Germany over 34 years – interview with authors // A model recently published Nature is able to explain previously unexplained temporal using complex locally highly variable weather data (MÜLLER et al. 2023). More significantly, was predict well of independent increases observed there between 2016 2022. anomalies associated climate change thus have a decisive influence on development highlight need further intensify existing...
Abstract. Critical data selection is essential for determining representative baseline levels of atmospheric trace gas measurements even at remote measuring sites. Different techniques have been used around the world which could potentially lead to bias when comparing from different stations. This paper presents a novel statistical method based on CO2 diurnal pattern occurring typically high elevated mountain Its capability and applicability was studied records 2010 2016 six Global...
<p>Real-time on-site observations are the fundamentals for studies of climate change, especially in phenology. The online environmental data collection and analysis platform BAYSICS has been developed Bavaria, Germany, order to assist promote essential climatic related research citizen scientists. In this study, we focus on presenting a novel aspect from such an integrated network – using interactive web applications guide scientists through applied change topics,...
<p>Aeroallergens contribute a major climate change impact on human health since warming favours the production and advances release of plant pollen. This goes in line with widely observed advance flowering response to increasing temperatures. However, documented phenological changes vary species traits, seasons, sites. Nevertheless, start end dates are known build solid baseline for assessing spatial temporal patterns pollen calendars. A closer look at match/mismatch season...