Markus Rex
YOU?
Author Swipe
View article: New insights in atmospheric methane variability in the Arctic by ship-borne measurements during MOSAiC
New insights in atmospheric methane variability in the Arctic by ship-borne measurements during MOSAiC Open
The sparse network of Arctic land-based stations results in significant data gaps for atmospheric methane (CH4), particularly in sea-ice covered regions. Ship-based measurements can complement these data, improving understanding of regiona…
View article: Ship-borne atmospheric measurements during MOSAiC contribute to detect CH4 sources and transport pathways in the Arctic 
Ship-borne atmospheric measurements during MOSAiC contribute to detect CH4 sources and transport pathways in the Arctic  Open
The Arctic region plays a crucial role in the global methane (CH4) budget, as it is anticipated to contain substantial CH4 sources, such as (subsea) permafrost. The sparse network of land-based meteorological observation stations in the Ar…
View article: How ENSO affects ozone, RHi and transport dynamics at the UTLS above Palau and the Tropical West Pacific
How ENSO affects ozone, RHi and transport dynamics at the UTLS above Palau and the Tropical West Pacific Open
The Upper Troposphere/Lower Stratosphere (UT/LS) above the Tropical West Pacific (TWP) is an important pathway into the global stratosphere, influencing stratospheric chemistry and atmospheric dynamics overall. Its composition and dynamics…
View article: ENSO impact on mid-tropospheric composition above the Tropical Western Pacific via air mass transport
ENSO impact on mid-tropospheric composition above the Tropical Western Pacific via air mass transport Open
The Tropical West Pacific (TWP) is the key entry point of air into the stratosphere during Northern Hemispheric winter. Thus, the local air composition can influence global atmospheric chemistry and dynamics. Its interannual variability is…
View article: Air mass transport to the tropical western Pacific troposphere inferred from ozone and relative humidity balloon observations above Palau
Air mass transport to the tropical western Pacific troposphere inferred from ozone and relative humidity balloon observations above Palau Open
The transport history of tropospheric air masses above the tropical western Pacific (TWP) is reflected by the local ozone and relative humidity (RH) characteristics. In boreal winter, the TWP is the main global entry point for air masses i…
View article: Air Mass Transport to the UTLS above the Tropical West Pacific
Air Mass Transport to the UTLS above the Tropical West Pacific Open
The Tropical West Pacific (TWP) is the key entry point of air into the stratosphere during Northern Hemispheric winter. Our previous work showed how transport to the TWP troposphere is modulated by the movement of the Intertropical Converg…
View article: Measurement report: The Palau Atmospheric Observatory and its ozonesonde record – continuous monitoring of tropospheric composition and dynamics in the tropical western Pacific
Measurement report: The Palau Atmospheric Observatory and its ozonesonde record – continuous monitoring of tropospheric composition and dynamics in the tropical western Pacific Open
The tropical western Pacific is recognized as an important region for stratosphere–troposphere exchange but lies in a data-sparse location that had a measurement gap in the global ozone sounding network. The Palau Atmospheric Observatory (…
View article: Overview of the MOSAiC expedition: Ecosystem
Overview of the MOSAiC expedition: Ecosystem Open
The international and interdisciplinary sea-ice drift expedition “The Multidisciplinary drifting Observatory for the Study of Arctic Climate” (MOSAiC) was conducted from October 2019 to September 2020. The aim of MOSAiC was to study the in…
View article: Comment on egusphere-2023-1518
Comment on egusphere-2023-1518 Open
Abstract. Due to the unique local air chemistry, the transport history of tropospheric air masses above the remote tropical West Pacific (TWP) is reflected by local ozone (O3) and relative humidity (RH) characteristics. In boreal winter, t…
View article: Air Mass Transport to the Tropical West Pacific Troposphere inferred from Ozone and Relative Humidity Balloon Observations above Palau
Air Mass Transport to the Tropical West Pacific Troposphere inferred from Ozone and Relative Humidity Balloon Observations above Palau Open
Due to the unique local air chemistry, the transport history of tropospheric air masses above the remote tropical West Pacific (TWP) is reflected by local ozone (O3) and relative humidity (RH) characteristics. In boreal winter, the TWP is …
View article: Comment on egusphere-2023-1023
Comment on egusphere-2023-1023 Open
Abstract. The Tropical West Pacific is recognized as an important region for stratosphere-troposphere exchange, but has been a measurement gap in the global ozone sounding network. The Palau Atmospheric Observatory (PAO) was established to…
View article: Measurement Report: The Palau Atmospheric Observatory and its Ozonesonde Record - Continuous Monitoring of Tropospheric Composition and Dynamics in the Tropical West Pacific
Measurement Report: The Palau Atmospheric Observatory and its Ozonesonde Record - Continuous Monitoring of Tropospheric Composition and Dynamics in the Tropical West Pacific Open
The Tropical West Pacific is recognized as an important region for stratosphere-troposphere exchange, but has been a measurement gap in the global ozone sounding network. The Palau Atmospheric Observatory (PAO) was established to study the…
View article: Model calculations of the contribution of tropospheric SO2 to the stratospheric aerosol layer
Model calculations of the contribution of tropospheric SO2 to the stratospheric aerosol layer Open
The stratospheric aerosol layer is important for stratospheric chemistry, climate change and in geo-engineering. Yet the processes governing the transport of sulfur to the stratosphere are poorly quantified. We present model calculations o…
View article: Neural representation of the stratospheric ozone chemistry
Neural representation of the stratospheric ozone chemistry Open
In climate modeling, the stratospheric ozone layer is typically only considered in a highly simplified form due to computational constraints. For climate projections, it would be of advantage to include the mutual interactions between stra…
View article: SWIFT-AI: Significant Speed-up in Modelling the Stratospheric Ozone Layer
SWIFT-AI: Significant Speed-up in Modelling the Stratospheric Ozone Layer Open
<p>Common representations of the stratospheric ozone layer in climate modeling are widely considered only in a very simplified way. Neglecting the mutual interactions of ozone with atmospheric temperature and dynamics has the effect …
View article: Arctic sea ice anomalies during the MOSAiC winter 2019/20
Arctic sea ice anomalies during the MOSAiC winter 2019/20 Open
During the winter of 2019/2020, as the Multidisciplinary drifting Observatory for the Study of Arctic Climate (MOSAiC) project started its work, the Arctic Oscillation (AO) experienced some of its largest shifts, ranging from a highly nega…
View article: A Year in the Changing Arctic Sea Ice
A Year in the Changing Arctic Sea Ice Open
Faced with a declining summer sea ice extent, enhanced warming relative to the rest of the globe, altered ecosystem dynamics, shifts in circulation and hydrological patterns, amplifying feedbacks, and potential looming tipping points, the …
View article: Overview of the MOSAiC expedition: Atmosphere
Overview of the MOSAiC expedition: Atmosphere Open
With the Arctic rapidly changing, the needs to observe, understand, and model the changes are essential. To support these needs, an annual cycle of observations of atmospheric properties, processes, and interactions were made while driftin…
View article: Overview of the MOSAiC expedition: Physical oceanography
Overview of the MOSAiC expedition: Physical oceanography Open
Arctic Ocean properties and processes are highly relevant to the regional and global coupled climate system, yet still scarcely observed, especially in winter. Team OCEAN conducted a full year of physical oceanography observations as part …
View article: Overview of the MOSAiC expedition: Snow and sea ice
Overview of the MOSAiC expedition: Snow and sea ice Open
Year-round observations of the physical snow and ice properties and processes that govern the ice pack evolution and its interaction with the atmosphere and the ocean were conducted during the Multidisciplinary drifting Observatory for the…
View article: Chemical Evolution of the Exceptional Arctic Stratospheric Winter 2019/2020 Compared to Previous Arctic and Antarctic Winters
Chemical Evolution of the Exceptional Arctic Stratospheric Winter 2019/2020 Compared to Previous Arctic and Antarctic Winters Open
The winter 2019/2020 showed the lowest ozone mixing ratios ever observed in the Arctic winter stratosphere. It was the coldest Arctic stratospheric winter on record and was characterized by an unusually strong and long‐lasting polar vortex…
View article: Origin of Tropospheric Air Masses in the Tropical West Pacific and related transport processes inferred from balloon-borne Ozone and Water Vapour observations from Palau
Origin of Tropospheric Air Masses in the Tropical West Pacific and related transport processes inferred from balloon-borne Ozone and Water Vapour observations from Palau Open
<p>Motivated by previous measurements of very low tropospheric ozone concentrations in the Tropical West Pacific (TWP) and the implied low oxidizing capacity of this key region for transport into the stratosphere in boreal winter (e.…
View article: Atmospheric processes in the Central Arctic during MOSAiC
Atmospheric processes in the Central Arctic during MOSAiC Open
<p>The atmosphere plays a central role in the Arctic climate system and its recent changes. Enhanced Arctic atmospheric warming over the past decades is linked with many key processes, including variability in large-scale circulation…
View article: The sensitivity of chemical loss of Arctic ozone to future levels of GHGs
The sensitivity of chemical loss of Arctic ozone to future levels of GHGs Open
<p>The chemical loss of ozone during Arctic winter and spring due to anthropogenic halogens is driven by temperature at high latitudes, with more loss occurring during cold years with meteorological conditions that are favourable for…
View article: Near&#8208;Complete Local Reduction of Arctic Stratospheric Ozone by Severe Chemical Loss in Spring 2020
Near‐Complete Local Reduction of Arctic Stratospheric Ozone by Severe Chemical Loss in Spring 2020 Open
<p>In the Antarctic ozone hole, ozone mixing ratios have been decreasing to extremely low values of 0.01&#8211;0.1 ppm in nearly all spring seasons since the late 1980s, corresponding to 95&#8211;99% local chemical loss. In c…
View article: Comment on tc-2020-375
Comment on tc-2020-375 Open
As the Multidisciplinary drifting Observatory for the Study of Arctic Climate (MOSAiC) project went into effect during the winter of 2019/2020, the Arctic Oscillation (AO) has experienced some of the largest shifts from a highly negative i…
View article: Improved Circulation in the Northern Hemisphere by Adjusting Gravity Wave Drag Parameterizations in Seasonal Experiments With ICON‐NWP
Improved Circulation in the Northern Hemisphere by Adjusting Gravity Wave Drag Parameterizations in Seasonal Experiments With ICON‐NWP Open
The stratosphere is one of the main potential sources for subseasonal to seasonal predictability in midlatitudes in winter. The ability of an atmospheric model to realistically simulate the stratospheric dynamics is essential in order to m…