Andrea K. Steiner
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View article: Evaluation of reanalysis precipitable water vapor under typhoon conditions using multi-source observations
Evaluation of reanalysis precipitable water vapor under typhoon conditions using multi-source observations Open
Precipitable water vapor (PWV) exhibits rapid and complex variations during typhoons, and its evaluation under typhoon conditions remains challenging due to sparse observations over the oceans. This study systematically evaluates PWV estim…
View article: Farming system is the main driver of enteric methanogenesis in grass-based veal calves
Farming system is the main driver of enteric methanogenesis in grass-based veal calves Open
Developing grass-based veal production from male dairy calves could be a low-input solution for raising such animals, particularly in organic systems. However, the impact of grazing on enteric methane emissions of young animals is not well…
View article: The potential of GNSS radio occultation data for the analysis of the tropical width: a comparison with reanalyses
The potential of GNSS radio occultation data for the analysis of the tropical width: a comparison with reanalyses Open
The tropics are expanding poleward as a result of anthropogenic climate change. This in turn has great implications on the temperature and precipitation patterns in the subtropical regions. Previous studies have found varying widening tren…
View article: Recent Warming of the Southern Hemisphere Subtropical Lower Stratosphere and Antarctic Ozone Healing
Recent Warming of the Southern Hemisphere Subtropical Lower Stratosphere and Antarctic Ozone Healing Open
Observed temperature changes from 2002 to 2022 reveal a pronounced warming of the Southern Hemisphere (SH) subtropical lower stratosphere, and a cooling of the Antarctic lower stratosphere. In contrast, model simulations of 21st‐century st…
View article: Exploring the potential of GNSS radio occultation for the analysis of tropical width metrics
Exploring the potential of GNSS radio occultation for the analysis of tropical width metrics Open
The tropics are expanding poleward as a result of anthropogenic climate change, this in turn has great implications on the temperature and precipitation patterns in the subtropical regions. Previous studies have found varying widening tren…
View article: Observed changes in the temperature and height of the globally resolved lapserate tropopause
Observed changes in the temperature and height of the globally resolved lapserate tropopause Open
The tropopause is a key indicator of atmospheric climate change, influenced by both the troposphere and stratosphere. Here we present a global view of tropopause changes, using high-resolution GNSS radio occultation data from 2002 to 2024.…
View article: Effects of dietary forage on feed efficiency of poultry from a slow-growing and a dual-purpose strain for organic fattening systems
Effects of dietary forage on feed efficiency of poultry from a slow-growing and a dual-purpose strain for organic fattening systems Open
Dual-purpose chickens are increasingly used in European organic poultry systems. To test whether lower feed conversion efficiency of dual-purpose chickens could be counterbalanced by less intensive feeds with higher proportions of dietary …
View article: Observed zonally and meridionally resolved trends in lapse rate tropopause temperature and height over the past two decades
Observed zonally and meridionally resolved trends in lapse rate tropopause temperature and height over the past two decades Open
The tropopause is a sensitive indicator of both radiative and dynamic changes in the atmospheric climate system. This study presents an analysis of lapse-rate tropopause (LRT) trends using remote-sensing satellite data for the period 2002-…
View article: Double jet streams and their connection to heatwaves in the Northern Hemisphere
Double jet streams and their connection to heatwaves in the Northern Hemisphere Open
Heat extremes are exacerbated by ongoing climate change and have severe consequences on humans and the environment. Climate change also leads to changes in atmospheric circulation that affect the jet stream. One configuration of the jet st…
View article: Stacking machine learning model for vertical interpolation of precipitable water vapor using GNSS networks and radio occultation data
Stacking machine learning model for vertical interpolation of precipitable water vapor using GNSS networks and radio occultation data Open
This study proposes a stacking machine learning (SML) model for the vertical interpolation of precipitable water vapor (PWV), addressing the issue of missing near-surface water vapor information in radio occultation (RO) profiles, where me…
View article: Observational perspective on sudden stratospheric warmings and blocking from Eliassen–Palm fluxes
Observational perspective on sudden stratospheric warmings and blocking from Eliassen–Palm fluxes Open
In this study, we examine eight major boreal sudden stratospheric warming (SSW) events between 2007 and 2019 to understand the vertical coupling between the troposphere and stratosphere as well as the relationship between SSWs and blocking…
View article: Strong persistent cooling of the stratosphere after the Hunga eruption
Strong persistent cooling of the stratosphere after the Hunga eruption Open
The 2022 eruption of the Hunga volcano was a major event that propelled aerosols and water vapor up to an altitude of 53–57 km. It caused an unprecedented stratospheric hydration that is expected to affect composition, thermal structure, c…
View article: Signs of climate variability in double tropopause global distribution from radio occultation data
Signs of climate variability in double tropopause global distribution from radio occultation data Open
In a standard atmosphere, there is a single lapse rate tropopause (in what follows, tropopause) that separates the troposphere below from the stratosphere above. However, in certain situations, such as in regions of strong vertical wind sh…
View article: Trade-offs between milk production potential, tannin content and plant diversity depend on grassland mixtures
Trade-offs between milk production potential, tannin content and plant diversity depend on grassland mixtures Open
International audience
View article: Observed Impacts of the Hunga Tonga Eruption on Stratospheric Temperature
Observed Impacts of the Hunga Tonga Eruption on Stratospheric Temperature Open
The massive eruption of the Hunga Tonga-Hunga Ha'apai (HTHH) volcano in 2022 not only set a record for plume height, transporting aerosols and water vapor up to an altitude of more than 50 km into the mesosphere, it also resulted in a subs…
View article: Observational perspective on SSWs and blocking from EP fluxes
Observational perspective on SSWs and blocking from EP fluxes Open
In this study, we examine eight major boreal Sudden Stratospheric Warming (SSW) events between 2007 and 2019 to understand the vertical coupling between the troposphere and stratosphere, as well as the relationship between SSWs and blockin…
View article: Evapotranspiration affects condensed tannin levels and MPP differently in four grassland mixes
Evapotranspiration affects condensed tannin levels and MPP differently in four grassland mixes Open
Dairy farming faces challenges of summer fodder scarcity and methane emissions. To address these issues, one may incorporate plants rich in condensed tannins (CT) into temporary grassland mixes. However, knowledge regarding the link betwee…
View article: Effects of dietary Sanguisorba minor, Plantago lanceolata, and Lotus corniculatus on urinary N excretion of dairy cows
Effects of dietary Sanguisorba minor, Plantago lanceolata, and Lotus corniculatus on urinary N excretion of dairy cows Open
Context Mitigating urinary nitrogen (N) losses is an important target of sustainable cattle nutrition concepts. One option to achieve this may be dietary inclusion of tanniferous herbs. Aims Aim of the study was to investigate herbs with d…
View article: Heat stored in the Earth system 1960–2020: where does the energy go?
Heat stored in the Earth system 1960–2020: where does the energy go? Open
The Earth climate system is out of energy balance, and heat has accumulated continuously over the past decades, warming the ocean, the land, the cryosphere, and the atmosphere. According to the Sixth Assessment Report by Working Group I of…
View article: Compound climate extremes: attribution and risk assessment to different compound extreme events in Africa
Compound climate extremes: attribution and risk assessment to different compound extreme events in Africa Open
Detection and attribution of climate extremes in Africa has predominantly focused on univariate analysis of drought events and heat waves in different regions of the continent, although there have been unusual extreme events such as the Et…
View article: Pathways of Influence Between Northern Hemisphere Blocking and Stratospheric Polar Vortex Variability
Pathways of Influence Between Northern Hemisphere Blocking and Stratospheric Polar Vortex Variability Open
We apply a causal inference‐based framework to test and quantify previously suggested causal relationships between Northern Hemisphere blocking, upward wave‐activity fluxes and stratospheric polar vortex (SPV) variability using reanalysis …
View article: Comment on essd-2022-239
Comment on essd-2022-239 Open
Abstract. The Earth climate system is out of energy balance and heat has accumulated continuously over the past decades, warming the ocean, the land, the cryosphere and the atmosphere. According to the 6th Assessment Report of the Intergov…
View article: Heat stored in the Earth system 1960–2020: Where does the energy go?
Heat stored in the Earth system 1960–2020: Where does the energy go? Open
The Earth climate system is out of energy balance and heat has accumulated continuously over the past decades, warming the ocean, the land, the cryosphere and the atmosphere. According to the 6th Assessment Report of the Intergovernmental …
View article: Observing the climate impact of large wildfires on stratospheric temperature
Observing the climate impact of large wildfires on stratospheric temperature Open
<p>In the future, large wildfires are expected to become more frequent and intense. Not only do they pose a serious threat to people and ecosystems, but they also affect the Earth's atmosphere. Aerosols from large wildfires can even …
View article: Observed connection between blocking and sudden stratospheric warming events using GNSS radio occultation observations
Observed connection between blocking and sudden stratospheric warming events using GNSS radio occultation observations Open
<p>A better understanding of the dynamics in the upper troposphere and lower stratosphere (UTLS) is important for e.g., improving surface weather predictability. This study focuses on wave propagation in the UTLS and its role in the …
View article: Observational evidence of large changes of Earth's atmospheric thermal structure in the 21st century
Observational evidence of large changes of Earth's atmospheric thermal structure in the 21st century Open
<p>Historically, retrieving the detailed structure of atmospheric temperature trends from observations has been demanding. For decades, observations of upper-air temperature have either lacked the necessary vertical resolution, or th…