A5083662446- Atmospheric Ozone and Climate
- Atmospheric and Environmental Gas Dynamics
- Atmospheric chemistry and aerosols
- Climate variability and models
- Meteorological Phenomena and Simulations
- Air Quality Monitoring and Forecasting
- Ocean Acidification Effects and Responses
- Distributed and Parallel Computing Systems
- Hydrology and Drought Analysis
- Scientific Computing and Data Management
- Air Quality and Health Impacts
- Methane Hydrates and Related Phenomena
- Hydrology and Watershed Management Studies
- Atmospheric aerosols and clouds
- Medical Imaging Techniques and Applications
- Climate Change Policy and Economics
- Vehicle emissions and performance
- Computational Physics and Python Applications
- Chemical Synthesis and Reactions
- Precipitation Measurement and Analysis
- Geophysics and Gravity Measurements
- Ionosphere and magnetosphere dynamics
- Coastal and Marine Management
- Spectroscopy and Laser Applications
- Protist diversity and phylogeny
Deutsches Zentrum für Luft- und Raumfahrt e. V. (DLR)
2017-2025
NSF National Center for Atmospheric Research
2022
Dienstleistungszentrum Ländlicher Raum
2021
Plymouth Marine Laboratory
2019
Bodeker Scientific (New Zealand)
2017-2018
NOAA Earth System Research Laboratory
2010-2018
Cooperative Institute for Research in Environmental Sciences
2010-2018
University of Colorado Boulder
2010-2018
National Oceanic and Atmospheric Administration
2016
NOAA Chemical Sciences Laboratory
2013-2014
The Tropospheric Ozone Assessment Report (TOAR) is an activity of the International Global Atmospheric Chemistry Project. This paper a component report, focusing on present-day distribution and trends tropospheric ozone relevant to climate global atmospheric chemistry model evaluation. Utilizing TOAR surface database, several figures present daytime average at 2702 non-urban monitoring sites, highlighting regions seasons world with greatest levels. Similarly, ozonesonde commercial aircraft...
From the earliest observations of ozone in lower atmosphere 19th century, both measurement methods and portion globe observed have evolved changed. These different uncertainties biases, data records differ with respect to coverage (space time), information content, representativeness. In this study, various datasets are reviewed selected for inclusion historical record background levels, based on relationship technique modern UV absorption standard, absence interfering pollutants,...
Abstract. The evolution of tropospheric ozone from 1850 to 2100 has been studied using data Phase 6 the Coupled Model Intercomparison Project (CMIP6). We evaluate long-term changes coupled atmosphere–ocean chemistry–climate models, focusing on CMIP Historical and ScenarioMIP ssp370 experiments, for which detailed tropospheric-ozone diagnostics were archived. model ensemble evaluated against a suite surface, sonde satellite observations past several decades found reproduce well salient...
Abstract. In this paper, we describe the construction of Stratospheric Water and Ozone Satellite Homogenized (SWOOSH) database, which includes vertically resolved ozone water vapor data from a subset limb profiling satellite instruments operating since 1980s. The primary SWOOSH products are zonal-mean monthly-mean time series mixing ratio on pressure levels (12 per decade 316 to 1 hPa). level provided several independent grids (2.5, 5, 10°), additional include two coarse 3-D griddings (30°...
Abstract. Ozone profile trends over the period 2000 to 2016 from several merged satellite ozone data sets and ground-based measured by four techniques at stations of Network for Detection Atmospheric Composition Change indicate significant increases in upper stratosphere, between 35 48 km altitude (5 1 hPa). Near 2 hPa (42 km), has been increasing about 1.5 % per decade tropics (20° S 20° N), 2.5 60° latitude bands both hemispheres. At levels below hPa), are smaller not statistically...
Abstract. >We analyse simulations performed for the Chemistry-Climate Model Initiative (CCMI) to estimate return dates of stratospheric ozone layer from depletion caused by anthropogenic chlorine and bromine. We consider a total 155 20 models, including range sensitivity studies which examine impact climate change on recovery. For control (unconstrained nudging towards analysed meteorology) there is large spread (±20 DU in global average) predictions absolute column. Therefore, model...
Abstract. Stratospheric ozone and water vapour are key components of the Earth system, past future changes to both have important impacts on global regional climate. Here, we evaluate long-term in these species from pre-industrial period (1850) end 21st century Coupled Model Intercomparison Project phase 6 (CMIP6) models under a range emissions scenarios. There is good agreement between CMIP multi-model mean observations for total column (TCO), although there substantial variation individual...
Precipitation is a key component of the hydrological cycle and one most important variables in weather climate studies. Accurate reliable precipitation data are crucial for determining trends variability. In this study, eleven different datasets compared, six reanalysis five observational datasets, including ERA5 WFDE5 from ECMWF family, to quantify differences between widely used identify their particular strengths shortcomings. The comparisons focused on common time period 1983 through...
Abstract. Trends in the vertical distribution of ozone are reported and compared for a number new recently revised data sets. The amount ozone-depleting compounds stratosphere (as measured by equivalent effective stratospheric chlorine – EESC) was maximised second half 1990s. We examine periods before after peak to see if any change trend is discernible record that might be attributable EESC trend, though no attribution attempted. Prior 1998, trends upper (~ 45 km, 4 hPa) found −5 −10 % per...
Abstract. The Earth System Model Evaluation Tool (ESMValTool) is a community diagnostics and performance metrics tool designed to improve comprehensive routine evaluation of system models (ESMs) participating in the Coupled Intercomparison Project (CMIP). It has undergone rapid development since first release 2016 now well-tested that provides end-to-end provenance tracking ensure reproducibility. consists (1) an easy-to-install, well-documented Python package providing core functionalities...
Abstract. This paper describes the second major release of Earth System Model Evaluation Tool (ESMValTool), a community diagnostic and performance metrics tool for evaluation system models (ESMs) participating in Coupled Intercomparison Project (CMIP). Compared to version 1.0, released 2016, ESMValTool 2.0 (v2.0) features brand new design, with an improved interface revised preprocessor. It also significantly enhanced part that is described three companion papers. The has been specifically...
Abstract Major sudden stratospheric warmings (SSWs), vortex formation, and final breakdown dates are key highlight points of the polar vortex. These phenomena relevant for stratosphere‐troposphere coupling, which explains interest in understanding their future changes. However, up to now, there is not a clear consensus on projected changes robust, particularly Northern Hemisphere, possibly due short data record or relatively moderate CO 2 forcing. The new simulations performed under Coupled...
Abstract Long‐term atmospheric NO x /CO enhancement ratios in megacities provide evaluations of emission inventories. A fuel‐based inventory approach that diverges from conventional bottom‐up methods explains 1970–2015 trends Los Angeles. Combining this comparison with similar measurements other U.S. cities demonstrates motor vehicle emissions controls were largely responsible for urban the past half century. Differing ratio and European over 25 years highlights alternative strategies...
Abstract. Peak stratospheric chlorofluorocarbon (CFC) and other ozone depleting substance (ODS) concentrations were reached in the mid- to late 1990s. Detection attribution of expected recovery layer an atmosphere with reduced ODSs as well efforts understand evolution presence increasing greenhouse gases are key current research topics. These require a critical examination changes accurate knowledge spatial (geographical vertical) temporal response. For such examination, it is vital that...
Abstract. In the framework of SI2N (SPARC (Stratosphere-troposphere Processes And their Role in Climate)/IO3C (International Ozone Commission)/IGACO-O3 (Integrated Global Atmospheric Chemistry Observations – Ozone)/NDACC (Network for Detection Composition Change)) initiative, several long-term vertically resolved merged ozone data sets produced from satellite measurements have been analysed and compared. This paper presents an overview methods, assumptions, challenges involved constructing...
Abstract Simulating clouds with global climate models is challenging as the relevant physics involves many nonlinear processes covering a wide range of spatial and temporal scales. As key components hydrological cycle system, an evaluation from used for projections important prerequisite assessing confidence in results these models. Here, we compare output contributing to phase 6 Coupled Model Intercomparison Project (CMIP6) satellite data their predecessors (CMIP5). We use multiproduct...
Future increases in stratospheric water vapour risk amplifying climate change and slowing down the recovery of ozone layer. However, state-of-the-art models strongly disagree on magnitude these under global warming. Uncertainty primarily arises from complex processes leading to dehydration air during its tropical ascent into stratosphere. Here we derive an observational constraint this longstanding uncertainty. We use a statistical-learning approach infer historical co-variations between...
Abstract. This study gives an overview of interannual variations total ozone and 50 hPa temperature. It is based on newer longer records from the 1979 to 2001 Total Ozone Monitoring Spectrometer (TOMS) Solar Backscatter Ultraviolet (SBUV) instruments, US National Center for Environmental Prediction (NCEP) reanalyses. Multiple linear least squares regression used attribute various natural anthropogenic explanatory variables. Usually, maps temperature look very similar, reflecting a close...
Abstract. High vertical resolution ozone measurements from eight different satellite-based instruments have been merged with data the global ozonesonde network to calculate monthly mean values in 5° latitude zones. These ''Tier 0'' number densities and mixing ratios are provided on 70 altitude levels (1 km) pressure spaced ~ 1 km apart (878.4 hPa 0.046 hPa). The Tier 0 sparse do not cover entire globe or range. To provide a gap-free database, least squares regression model is fitted then...
Abstract. A new database of trace gases and aerosols with global coverage, derived from high vertical resolution profile measurements, has been assembled as a collection binary data files; hereafter referred to the "Binary DataBase Profiles" (BDBP). Version 1.0 BDBP, described here, includes measurements different satellite- (HALOE, POAM II III, SAGE I II) ground-based measurement systems (ozonesondes). In addition primary product ozone, secondary other gases, aerosol extinction, temperature...
[1] October mean total column ozone data from four Antarctic stations form the basis for understanding evolution of hole since 1960. While these show similar emergence 1960 to 1980, records are divergent in last two decades. The effects long-term changes vortex shape and location considered by gridding measurements equivalent latitude. A clear eastward shift position with time is revealed, which fraction taken inside/outside collar region. After including only those made inside vortex,...
Abstract. Earth System Models (ESMs) allow numerical simulations of the Earth's climate system. Driven by need to better understand change and its impacts, these models have become increasingly sophisticated over time, generating vast amounts data. To effectively evaluate complex state-of-the-art ESMs ensure their reliability, new tools for comprehensive analysis are essential. The open-source community-driven Model Evaluation Tool (ESMValTool) addresses this critical providing a software...