Tobias Könemann
A5069219624- Atmospheric chemistry and aerosols
- Air Quality and Health Impacts
- Atmospheric aerosols and clouds
- Air Quality Monitoring and Forecasting
- Atmospheric Ozone and Climate
- Indoor Air Quality and Microbial Exposure
- Environmental and biological studies
- Remote Sensing in Agriculture
- Atmospheric and Environmental Gas Dynamics
- Plant Water Relations and Carbon Dynamics
- Geography and Environmental Studies
- Species Distribution and Climate Change
- Health and Medical Studies
- demographic modeling and climate adaptation
- Luminescence and Fluorescent Materials
- Climate variability and models
- Polar Research and Ecology
- Arctic and Antarctic ice dynamics
- Dendrimers and Hyperbranched Polymers
- Methane Hydrates and Related Phenomena
- Analytical Chemistry and Sensors
- Cryospheric studies and observations
- Biosensors and Analytical Detection
- Hydrocarbon exploration and reservoir analysis
- Synthetic Aperture Radar (SAR) Applications and Techniques
Max Planck Institute for Chemistry
2015-2020
Max Planck Institute for Biogeochemistry
2019
Abstract. The Amazon Basin plays key roles in the carbon and water cycles, climate change, atmospheric chemistry, biodiversity. It has already been changed significantly by human activities, more pervasive change is expected to occur coming decades. therefore essential establish long-term measurement sites that provide a baseline record of present-day climatic, biogeochemical, conditions will be operated over decades monitor region, as perturbations increase future. Tall Tower Observatory...
Abstract. Airborne observations over the Amazon Basin showed high aerosol particle concentrations in upper troposphere (UT) between 8 and 15 km altitude, with number densities (normalized to standard temperature pressure) often exceeding those planetary boundary layer (PBL) by 1 or 2 orders of magnitude. The measurements were made during German–Brazilian cooperative aircraft campaign ACRIDICON–CHUVA, where ACRIDICON stands for Aerosol, Cloud, Precipitation, Radiation Interactions Dynamics...
Abstract. Size-resolved long-term measurements of atmospheric aerosol and cloud condensation nuclei (CCN) concentrations hygroscopicity were conducted at the remote Amazon Tall Tower Observatory (ATTO) in central Basin over a 1-year period full seasonal cycle (March 2014–February 2015). The provide climatology CCN properties characteristic Amazonian rain forest site.The continuously cycled through 10 levels supersaturation (S = 0.11 to 1.10 %) span particle size range from 20 245 nm. mean...
Abstract. Atmospheric particles of biological origin, also referred to as bioaerosols or primary aerosol (PBAP), are important various human health and environmental systems. There has been a recent steep increase in the frequency published studies utilizing commercial instrumentation based on ultraviolet laser/light-induced fluorescence (UV-LIF), such WIBS (wideband integrated bioaerosol sensor) UV-APS (ultraviolet aerodynamic particle sizer), for detection both outdoors built environment....
Abstract. Size-resolved measurements of atmospheric aerosol and cloud condensation nuclei (CCN) concentrations hygroscopicity were conducted over a full seasonal cycle at the remote Amazon Tall Tower Observatory (ATTO, March 2014–February 2015). In preceding companion paper, we presented annually seasonally averaged data parametrizations (Part 1; Pöhlker et al., 2016a). present study 2), analyze key features implications CCN properties for following characteristic conditions: Empirically...
Abstract. The Amazon rainforest is a sensitive ecosystem experiencing the combined pressures of progressing deforestation and climate change. Its atmospheric conditions oscillate between biogenic biomass burning (BB) dominated states. further represents one few remaining continental places where atmosphere approaches pristine during occasional wet season episodes. Tall Tower Observatory (ATTO) has been established in central Amazonia to investigate complex interactions atmosphere. Physical...
Abstract. The Amazon rain forest experiences the combined pressures from human-made deforestation and progressing climate change, causing severe potentially disruptive perturbations of ecosystem's integrity stability. To intensify research on critical aspects Amazonian biosphere–atmosphere exchange, Tall Tower Observatory (ATTO) has been established in central Basin. Here we present a multi-year analysis backward trajectories to derive an effective footprint region observatory, which spans...
Non-methane hydrocarbons (NMHCs) such as ethane and propane are significant atmospheric pollutants precursors of tropospheric ozone, while the Middle East is a global emission hotspot due to extensive oil gas production. Here we compare in situ hydrocarbon measurements, performed around Arabian Peninsula, with model simulations that include current inventories (EDGAR) state-of-the-art circulation chemistry mechanisms (EMAC model). While measurements high mixing ratios over Gulf adequately...
Abstract. Primary biological aerosol particles (PBAPs) in the atmosphere are highly relevant for Earth system, climate, and public health. The analysis of PBAPs, however, remains challenging due to their high diversity large spatiotemporal variability. For real-time PBAP analysis, light-induced fluorescence (LIF) instruments have been developed widely used laboratory ambient studies. interpretation data from these instruments, is often limited by a lack spectroscopic information. This study...
Abstract. Airborne observations over the Amazon Basin showed high aerosol particle concentrations in upper troposphere (UT) between 8 and 15 km altitude, with number densities (normalized to standard temperature pressure) often exceeding those planetary boundary layer (PBL) by one or two orders of magnitude. The measurements were made during German-Brazilian cooperative aircraft campaign ACRIDICON-CHUVA on German High Altitude Long Range Research Aircraft (HALO). took place September/October...
Abstract. Fluorescent dyed polystyrene latex spheres (PSLs) are commonly used for characterization and calibration of instruments detecting fluorescence signals from particles suspended in the air other fluids. Instruments like Ultraviolet Aerodynamic Particle Sizer (UV-APS) Waveband Integrated Bioaerosol Sensor (WIBS) widely bioaerosol research, but these present significant technical physical challenges requiring careful with standard particles. Many research communities use flow cytometry...
Abstract. The Amazon Basin plays key roles in the carbon and water cycles, climate change, atmospheric chemistry, biodiversity. It already has been changed significantly by human activities, more pervasive change is expected to occur next decades. therefore essential establish long-term measurement sites that provide a baseline record of present-day climatic, biogeochemical, conditions will be operated over coming decades monitor region as perturbations increase future. Tall Tower...
Characteristic particle size, fluorescence intensity, and spectra are important features to detect categorize bioaerosols. A prototype size-resolved single-particle spectrometer (S2FS) was developed simultaneously measure aerodynamic diameters spectra. Emission dispersed in 512 channels from 370 610 nm, where a major portion of biological emission occurs. The S2FS consists an sizer with 355 nm laser excitation source intensified charge-coupled device as the detector. Highly fluorescent...
Abstract. Atmospheric particles of biological origin, also referred to as bioaerosols or primary aerosol (PBAP), are important various human health and environmental systems. There has been a recent steep increase in the frequency published studies utilizing commercial instrumentation based on ultraviolet laser/light-induced fluorescence (UV-LIF), such WIBS (wideband integrated bioaerosol sensor) UV-APS (ultraviolet aerodynamic particle sizer), for detection both outdoors built environment....
Abstract. The Amazon rain forest experiences the combined pressures from man-made deforestation and progressing climate change, causing severe potentially disruptive perturbations of ecosystem's integrity stability. To intensify research on critical aspects Amazonian biosphere-atmosphere exchange, Tall Tower Observatory (ATTO) has been established in central Basin. Here we present a multi-year analysis backward trajectories to derive an effective footprint region observatory, which spans...
Abstract. The Amazon rain forest is considered a very sensitive ecosystem that could be significantly affected by changing climate. It still one of the few places on Earth where atmosphere in continent approaches near-pristine conditions for some periods year. Tall Tower Observatory (ATTO) has been built central Amazonia to monitor atmospheric and conditions. at ATTO site oscillate between biogenic biomass burning (BB) dominated states. By using comprehensive ground-based aerosol measurement...
Abstract. Size-resolved long-term measurements of atmospheric aerosol and cloud condensation nuclei (CCN) concentrations as well hygroscopicity were conducted at the remote Amazon Tall Tower Observatory (ATTO) in central Basin over a one-year period full seasonal cycle (March 2014–February 2015). The presented provide climatology CCN properties for characteristic Amazonian rain forest site. continuously cycled through 10 levels supersaturation (S = 0.11 to 1.10 %) span particle size range...
Abstract. Size-resolved measurements of atmospheric aerosol and cloud condensation nuclei (CCN) concentrations hygroscopicity were conducted at the remote Amazon Tall Tower Observatory (ATTO) in central Basin over a full seasonal cycle (Mar 2014–Feb 2015). In companion part 1 paper, we presented an in-depth CCN characterization based on annually as well seasonally averaged time intervals discuss different parametrization strategies to represent Amazonian cycling modelling studies (M. Pöhlker...
Abstract. Primary biological aerosol particles (PBAP) in the atmosphere are highly relevant for Earth system, climate, and public health. The analysis of PBAP, however, remains challenging due to their high diversity large spatiotemporal variability. For real-time PBAP analysis, light-induced fluorescence (LIF) instruments have been developed widely used laboratory ambient studies. interpretation data from these instruments, is often limited by a lack spectroscopic information. This study...