A5050061545- Climate variability and models
- Atmospheric and Environmental Gas Dynamics
- Cosmology and Gravitation Theories
- Black Holes and Theoretical Physics
- Meteorological Phenomena and Simulations
- Climate Change Policy and Economics
- Relativity and Gravitational Theory
- Ionosphere and magnetosphere dynamics
- Phagocytosis and Immune Regulation
- Atmospheric chemistry and aerosols
- Simulation Techniques and Applications
- Geophysics and Gravity Measurements
- Galaxies: Formation, Evolution, Phenomena
- Climate Change and Health Impacts
- Earthquake Detection and Analysis
- Solar and Space Plasma Dynamics
- Protein Degradation and Inhibitors
- Chronic Lymphocytic Leukemia Research
- Peptidase Inhibition and Analysis
- Global Energy and Sustainability Research
- Combustion and Detonation Processes
- Cryospheric studies and observations
- Scientific Research and Discoveries
- Advanced Breast Cancer Therapies
- Atmospheric Ozone and Climate
CICERO Center for International Climate Research
2020-2024
Potsdam Institute for Climate Impact Research
2024
Stockholm University
2016-2018
KTH Royal Institute of Technology
2016-2018
St Petersburg University
2016
University of Oslo
2010-2015
The possibility that the dark matter comprises primordial black holes (PBHs) is considered, with particular emphasis on currently allowed mass windows at $10^{16}$ - $10^{17}\,$g, $10^{20}$ $10^{24}\,$g and $1$ $10^{3}\,M_{\odot}$. Planck relics of smaller evaporating PBHs are also considered. All relevant constraints (lensing, dynamical, large-scale structure accretion) reviewed various effects necessary for a precise calculation PBH abundance (non-Gaussianity, non-sphericity, critical...
This study evaluates global climate models participating in the Coupled Model Intercomparison Project phase 6 (CMIP6) for their performance simulating extreme indices defined by Expert Team on Climate Change Detection and Indices (ETCCDI). We compare climatology patterns of simulated CMIP6 with those from HadEX3 four reanalysis datasets CMIP5 multi-model ensemble using root-mean-square errors 1981–2000 period. Regional evaluations are conducted 41 sub-regions, Intergovernmental Panel Sixth...
Abstract This paper analyzes the ensemble of regional climate model (RCM) projections for Europe completed within EURO‐CORDEX project. Projections are available two greenhouse gas concentration scenarios RCP2.6 (22 members) and RCP8.5 (55 at 0.11° resolution from 11 RCMs driven by eight global models (GCMs). The RCM results compared with driving CMIP5 but also a subset last generation CMIP6 projections. Maximum warming is projected all ensembles in Northern winter, along maximum...
The use of regional climate model (RCM)-based projections for providing information in a research and service contexts is currently expanding very fast. This has been possible thanks to considerable effort developing comprehensive ensembles RCM projections, especially Europe, the EURO-CORDEX community (Jacob et al., 2014, 2020). As end 2019, developed set 55 historical scenario (RCP8.5) using 8 driving global models (GCMs) 11 RCMs. article presents ensemble including its design. We target...
The basics of teleparallel gravity and its extensions are reviewed with particular emphasis on the problem Lorentz-breaking choice connection in pure-tetrad versions theories. Various possible ways to covariantise such models discussed. A by-product is a new form $f(T)$ field equations.
Abstract. Reduced-complexity climate models (RCMs) are critical in the policy and decision making space, directly used within multiple Intergovernmental Panel on Climate Change (IPCC) reports to complement results of more comprehensive Earth system models. To date, evaluation RCMs has been limited a few independent studies. Here we introduce systematic form Reduced Complexity Model Intercomparison Project (RCMIP). We expect RCMIP will extend over phases, with Phase 1 being first. In 1, focus...
Abstract. While the Intergovernmental Panel on Climate Change (IPCC) physical science reports usually assess a handful of future scenarios, Working Group III contribution climate mitigation to IPCC's Sixth Assessment Report (AR6 WGIII) assesses hundreds thousands emissions scenarios. A key task in WGIII is global mean temperature outcomes these scenarios consistent manner, given challenge that from different integrated assessment models (IAMs) come with sectoral and gas-to-gas coverage...
Global warming is leading to increased heat stress in many regions around the world. An extensive number of indicators (HSIs) has been developed measure associated impacts on human health. Here we calculate eight HSIs for global climate models participating Coupled Model Intercomparison Project Phase 6 (CMIP6). We compare their future trends as function mean temperature, with particular focus highly populated regions. All analyzed increase significantly (p < 0.01) all considered Moreover,...
Abstract With increasing global interest in molecular hydrogen to replace fossil fuels, more attention is being paid potential leakages of into the atmosphere and its environmental consequences. Hydrogen not directly a greenhouse gas, but chemical reactions change abundances gases methane, ozone, stratospheric water vapor, as well aerosols. Here, we use model ensemble five atmospheric chemistry models estimate 100-year time-horizon Global Warming Potential (GWP100) hydrogen. We GWP100 11.6 ±...
Over the last decades, climate science has evolved rapidly across multiple expert domains. Our best tools to capture state-of-the-art knowledge in an internally self-consistent modeling framework are increasingly complex fully coupled Earth System Models (ESMs). However, computational limitations and structural rigidity of ESMs mean that full range uncertainties domains difficult with alone. The choice instead more computationally efficient reduced complexity models (RCMs), which...
A ghost-free theory of gravity with two dynamical metrics both coupled to matter is shown be consistent and viable. Its cosmological implications are studied, the models, in particular context partially massless gravity, found explain cosmic acceleration without resorting dark energy.
Certain inflationary models as well realisations of phase transitions in the early Universe predict formation primordial black holes. For most mass ranges, fraction matter form holes is limited by many different observations on various scales. Primordial are assumed to be formed when overdensities that cross horizon have Schwarzschild radii larger than horizon. Traditionally it was therefore black-hole masses were equal at their time formation. However, detailed calculations collapse show...
Abstract Reliable projections of extremes by climate models are becoming increasingly important in the context change and associated societal impacts. Extremes definition rare events, characterized a small sample with large uncertainties. The evaluation extreme events model simulations thus requires performance measures that compare full distributions rather than simple summaries. This paper proposes use integrated quadratic distance (IQD) for this purpose. IQD is applied to evaluate CMIP5...
Abstract. This paper complements a series of now four publications that document the release Earth System Model Evaluation Tool (ESMValTool) v2.0. It describes new diagnostics on hydrological cycle, extreme events, impact assessment, regional evaluations, and ensemble member selection. The are developed by large community scientists aiming to facilitate evaluation comparison system models (ESMs) which participating in Coupled Intercomparison Project (CMIP). second this tool aims support ESMs...
Abstract. Resolved spatial information for climate change projections is critical to any robust assessment of impacts and adaptation options. However, the range spatially resolved future scenario assessments available limited, due significant computational human demands Earth System Model (ESM) pipelines. In order explore a wider variety societal outcomes enable coupling into modeling frameworks, rapid emulation ESM response therefore desirable. Existing linear pattern scaling methods assume...
Ongoing failure to reduce anthropogenic greenhouse gas emissions rates has fuelled debate within scientific, policy and public discourses on whether the 1.5&#176;C high-ambition Paris Agreement goal remains reach. The Working Group III (WG3) contribution of Sixth Assessment Intergovernmental Panel Climate Change (IPCC) report provided global mean temperature projections from 1202 integrated assessment model derived pathways. Of these, 97 were deemed be consistent with goal, interpreted...
Introducing METEOR (Multivariate Emulation of Time-Evolving and Overlapping Responses) - a spatially resolved impacts emulator. P. Spatially emulators can produce such data with fraction the computational cost required by full Earth system models, allowing exploration much richer scenario space.METEOR uses model output to emulate impact response patterns varying decay timescales forcing changes. As such, allows for projection future climate changes, including modelling hysteresis in...
Given the significant role of volatile organic compounds (VOCs) on ozone formation, methane lifetime, atmospheric hydrogen secondary aerosol overall chemistry, and both indirect direct health impacts, their accurate representation in global chemistry models is crucial. In this context, we introduce Volatile Organic Compounds Model Intercomparison Project (VOCMIP) invite modeling groups to participate collaborative effort. VOCMIP aims identify model consistencies discrepancies, enhance...
Abstract. While the IPCC’s physical science report usually assesses a handful of future scenarios, IPCC Sixth Assessment Working Group III (AR6 WGIII) on climate mitigation hundreds to thousands emissions scenarios. A key task is assess global-mean temperature outcomes these scenarios in consistent manner, given challenge that emission from different integrated assessment models come with sectoral and gas-to-gas coverage cannot all be assessed consistently by complex Earth System Models. In...