Jošt V. Lavrič
A5077081236- Atmospheric and Environmental Gas Dynamics
- Atmospheric chemistry and aerosols
- Atmospheric Ozone and Climate
- Atmospheric aerosols and clouds
- Methane Hydrates and Related Phenomena
- Climate variability and models
- Hydrocarbon exploration and reservoir analysis
- Cryospheric studies and observations
- Meteorological Phenomena and Simulations
- Plant Water Relations and Carbon Dynamics
- Spectroscopy and Laser Applications
- Geology and Paleoclimatology Research
- Remote Sensing in Agriculture
- Environmental and biological studies
- Geochemistry and Geologic Mapping
- Plant responses to elevated CO2
- Air Quality and Health Impacts
- Groundwater and Isotope Geochemistry
- Geography and Environmental Studies
- Isotope Analysis in Ecology
- Air Quality Monitoring and Forecasting
- Climate change and permafrost
- Fire effects on ecosystems
- Marine and coastal ecosystems
- Ocean Acidification Effects and Responses
Max Planck Institute for Biogeochemistry
2015-2024
ACOEM (France)
2022
Integrated Carbon Observation System
2016-2018
Max Planck Society
2010-2016
Centre National de la Recherche Scientifique
2010-2012
Université de Versailles Saint-Quentin-en-Yvelines
2011-2012
Laboratoire des Sciences du Climat et de l'Environnement
2010-2012
Commissariat à l'Énergie Atomique et aux Énergies Alternatives
2011-2012
Université Paris Sciences et Lettres
2010
Laboratoire de Glaciologie et Géophysique de l’Environnement
2010
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 Between 1 September and 4 October 2014, a combined airborne ground-based measurement campaign was conducted to study tropical deep convective clouds over the Brazilian Amazon rain forest. The new German research aircraft, High Altitude Long Range Research Aircraft (HALO), modified Gulfstream G550, extensive instrumentation were deployed in near Manaus (State of Amazonas). part German–Brazilian Aerosol, Cloud, Precipitation, Radiation Interactions Dynamics Convective Cloud...
Abstract. To monitor the continental carbon cycle, a fully automated low maintenance measurement system is installed at Zotino Tall Tower Observatory in Central Siberia (ZOTTO, 60°48' N, 89°21' E) since April 2009. A cavity ring-down spectroscopy (CRDS) analyzer continuously measures dioxide (CO2) and methane (CH4) from six heights up to 301 m a.g.l. Buffer volumes each air line remove short term CO2 CH4 mixing ratio fluctuations associated with turbulence, allow continuous, near-concurrent...
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. The Total Carbon Column Observing Network (TCCON) is a ground-based network of Fourier Transform Spectrometer (FTS) sites around the globe, where column abundances CO2, CH4, N2O, CO and O2 are measured. CO2 constrained with precision better than 0.25% (1-σ). To achieve similarly high accuracy, calibration to World Meteorological Organization (WMO) standards required. This paper introduces first aircraft campaign five European TCCON mobile FTS instrument. A series WMO in-situ...
The causes of the ∼80 ppmv increase atmospheric carbon dioxide (CO 2 ) during last glacial‐interglacial climatic transition remain debated. We analyzed parallel evolution CO and its stable isotopic ratio ( δ 13 in European Project for Ice Coring Antarctica (EPICA) Dome C ice core to bring additional constraints. Agreeing well but largely improving Taylor record lower resolution, our is characterized by a W shape, with two negative excursions 0.5‰ Heinrich 1 Younger Dryas events, bracketing...
Abstract. We present inverse modelling (top down) estimates of European methane (CH4) emissions for 2006–2012 based on a new quality-controlled and harmonised in situ data set from 18 atmospheric monitoring stations. applied an ensemble seven models performed four inversion experiments, investigating the impact different sets stations use priori information emissions. The infer total CH4 26.8 (20.2–29.7) Tg yr−1 (mean, 10th 90th percentiles all inversions) EU-28 experiments. For comparison,...
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...
The hydroxyl radical (OH) removes most atmospheric pollutants from air. loss frequency of OH radicals due to the combined effect all gas-phase reactive species is a measureable quantity termed total reactivity. Here we present reactivity observations in pristine Amazon rainforest air, as function season, time-of-day and height (0-80 m). Total low during wet (10 s(-1)) high dry season (62 s(-1)). Comparison individually measured trace gases reveals strong variation unaccounted for reactivity,...
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. In the Amazonian atmosphere, aerosol coarse mode comprises a complex, diverse, and variable mixture of bioaerosols emitted from rain forest ecosystem, long-range transported Saharan dust (we use Sahara as shorthand for source regions in Africa north Equator), marine aerosols Atlantic Ocean, smoke particles deforestation fires. For forest, are significance with respect to biogeochemical hydrological cycling, well ecology biogeography. However, knowledge on physicochemical biological...
Abstract. Black carbon (BC) aerosols influence the Earth's atmosphere and climate, but their microphysical properties, spatiotemporal distribution, long-range transport are not well constrained. This study presents airborne observations of transatlantic BC-rich African biomass burning (BB) smoke into Amazon Basin using a Single Particle Soot Photometer (SP2) as several complementary techniques. We base our results on trace gases off Brazilian coast onboard HALO (High Altitude LOng range)...
During the summer of 2018, a widespread drought developed over Northern and Central Europe. The increase in temperature reduction soil moisture have influenced carbon dioxide (CO2) exchange between atmosphere terrestrial ecosystems various ways, such as photosynthesis, changes ecosystem respiration, or allowing more frequent fires. In this study, we characterize resulting perturbation atmospheric CO2 seasonal cycles. 2018 has good coverage European regions affected by drought, investigation...
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...
Abstract Smoke from vegetation fires affects air quality, atmospheric cycling, and the climate in Amazon rain forest. A major unknown has remained quantity of long-range transported smoke Africa relation to local regional fire emissions. Here we quantify abundance, seasonality, properties African central Amazonia. We show that it accounts for ~ 60% black carbon concentrations during wet season 30% dry season. The influences aerosol-radiation interactions across entire Amazon, with strongest...
Abstract. The effect of aerosol loading on solar radiation and the subsequent photosynthesis is a relevant question for estimating climate feedback mechanisms. This quantified in present study using ground-based measurements from five remote sites boreal hemiboreal (coniferous mixed) forests Eurasia. diffuse fraction global associated with direct aerosols, i.e. excluding clouds, increases an increase loading. approximately 0.11 days characterized by low to 0.2–0.27 relatively high leads...
Abstract. We present methane (CH4) flux estimates for 2005 to 2013 from a Bayesian inversion focusing on the high northern latitudes (north of 50° N). Our is based atmospheric transport modelled by Lagrangian particle dispersion model FLEXPART and CH4 observations 17 in situ five discrete flask-sampling sites distributed over North America Eurasia. fluxes are determined at monthly temporal resolution variable grid with maximum 1° × 1°. finds source 82 84 Tg yr−1, constituting ∼ 15 % global...
Abstract. We use a global chemical transport model (GEOS-Chem) to interpret observed light-absorbing aerosols in Amazonia during the wet season. Observed aerosol properties, including black carbon (BC) concentration and light absorption, at Amazon Tall Tower Observatory (ATTO) site central have relatively low background levels but frequently show high peaks study period of January–April 2014. With daily temporal resolution for open fire emissions modified optical our successfully captures...
Aerosols produced by wildfires are a common phenomenon in boreal regions. For the Siberian taiga, it is still an open question if effects of aerosols on atmospheric conditions increase net CO2 uptake or photosynthesis. We investigated factors controlling forest ecosystem productivity (NEP) and explored how clouds smoke modulate radiation as major factor NEP during fire events years 2012 2013. To characterize underlying mechanisms response to environmental drivers, Artificial Neural Networks...
We employed a global high-resolution inverse model to optimize the CH4 emission using Greenhouse gas Observing Satellite (GOSAT) and surface observation data for period from 2011–2017 two main source categories of anthropogenic natural emissions. used Emission Database Global Atmospheric Research (EDGAR v4.3.2) methane scaled them by country match national inventories reported United Nations Framework Convention on Climate Change (UNFCCC). Wetland soil sink prior fluxes were simulated...
We present a global 0.1° × high-resolution inverse model, NIES-TM-FLEXPART-VAR (NTFVAR), and methane emission evaluation using the Greenhouse Gas Observing Satellite (GOSAT) satellite ground-based observations from 2010–2012. Prior fluxes contained two variants of anthropogenic emissions, Emissions Database for Global Atmospheric Research (EDGAR) v4.3.2 adjusted EDGAR which were scaled to match country totals by national reports United Nations Framework Convention on Climate Change (UNFCCC),...
Abstract. In September/October 2009, six European ground-based Fourier Transform Spectrometers (FTS) of the Total Carbon Column Observation Network (TCCON) were calibrated for first time using aircraft measurements. The campaign was part Infrastructure Measurement Cycle (IMECC) project. During this campaign, altitude profiles several trace gases and meteorological parameters taken close to FTS sites (typically within 1–2 km distance flight altitudes below 5000 m). Profiles CO2, CH4, CO H2O...
Abstract. We present long-term (5-year) measurements of particulate matter with an upper diameter limit ∼ 10 µm (PM10), elemental carbon (EC), organic (OC), and water-soluble (WSOC) in aerosol filter samples collected at the Zotino Tall Tower Observatory middle-taiga subzone (Siberia). The data are complemented monoxide (CO) measurements. Air mass back trajectory analysis satellite image were used to characterise potential source regions transport pathway haze plumes. Polluted background...