Andreas Lehmann
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View article: Reconstruction of the Spatial Physical and Bio-Geochemical Fields based on of earth observations, numerical modeling and AI methods within the framework of 4DBaltDyn ESA project
Reconstruction of the Spatial Physical and Bio-Geochemical Fields based on of earth observations, numerical modeling and AI methods within the framework of 4DBaltDyn ESA project Open
Modern satellite data offer powerful and unprecedented tools for monitoring the marine environment on a global scale. However, due to their inherent nature, these observations are predominantly limited to the sea surface, thus providing on…
View article: FAIRification of sensor-based time-series data – a demonstration of the Helmholtz DataHub digital ecosystem 
FAIRification of sensor-based time-series data – a demonstration of the Helmholtz DataHub digital ecosystem  Open
In environmental sciences, observational data remains indispensable for monitoring and understanding of natural processes, validating earth system models and remote sensing products, and training of data driven methods. However, unified st…
View article: Application of SMOS SSS L4 data to improve the understanding of the salinity dynamics and circulation of the Baltic Sea
Application of SMOS SSS L4 data to improve the understanding of the salinity dynamics and circulation of the Baltic Sea Open
The Baltic Sea is a semi-enclosed shelf sea and characterized by its distinct geographical and oceanographic features. One of the Baltic’s most remarkable features is its surface salinity gradient that is horizontally decreasing from…
View article: Validation of three-dimensional hydrodynamic models of the Gulf of Finland
Validation of three-dimensional hydrodynamic models of the Gulf of Finland Open
A model-intercomparison study was conducted, the first of its kind for the Baltic Sea, whose aim was to systematically simulate the basic three-dimensional hydrographic properties of a realistic, complex basin. Simulations of the hydrograp…
View article: Identifying potentially high risk areas for environmental pollution in the Baltic Sea
Identifying potentially high risk areas for environmental pollution in the Baltic Sea Open
The study aims at the identification of areas in the Baltic Sea from where potential pollution is transported to vulnerable regions. Generally, there is higher risk of ship accidents along the shipping routes and along the approaching rout…
View article: Climate challenges for fish larvae: Interactive multi-stressor effects impair acclimation potential of Atlantic herring larvae
Climate challenges for fish larvae: Interactive multi-stressor effects impair acclimation potential of Atlantic herring larvae Open
Fish early life stages are particularly vulnerable and heavily affected by changing environmental factors. The interactive effects of multiple climate change-related stressors on fish larvae remain, however, largely underexplored. As risin…
View article: Development and operation of a novel non-invasive opto-acoustic underwater fish observatory in Kiel Bight, Southwestern Baltic Sea
Development and operation of a novel non-invasive opto-acoustic underwater fish observatory in Kiel Bight, Southwestern Baltic Sea Open
This study presents a trilateral test array of new opto-acoustic Underwater Fish Observatories (UFOs) that were operated and tested in Kiel Bight as part of the “UFOTriNet” project. While hydroacoustic and optical techniques have so far be…
View article: Early arrival of spring‐spawning Atlantic herring <i>Clupea harengus</i> at their spawning ground in the Kiel Fjord, western Baltic, relates to increasing winter seawater temperature
Early arrival of spring‐spawning Atlantic herring <i>Clupea harengus</i> at their spawning ground in the Kiel Fjord, western Baltic, relates to increasing winter seawater temperature Open
The disturbance of marine organism phenology due to climate change and the subsequent effects on recruitment success are still poorly understood, especially in migratory fish species, such as the Atlantic herring ( Clupea harengus ; Clupei…
View article: An interlinked research data infrastructure for time-series data from the Helmholtz Research Field Earth &amp; Environment
An interlinked research data infrastructure for time-series data from the Helmholtz Research Field Earth & Environment Open
Time-series data are crucial sources of reference information in all environmental sciences. And beyond typical research applications, the consistent and timely publication of such data is increasingly important for monitoring and issuing …
View article: Changing impact of large-scale atmospheric circulation variability on the water mass exchange and circulation of the Baltic Sea for the period 1950-2022
Changing impact of large-scale atmospheric circulation variability on the water mass exchange and circulation of the Baltic Sea for the period 1950-2022 Open
Different North Atlantic winter climate regimes force different circulation patterns in the Baltic Sea. Furthermore, as the atmospheric circulation, to a large extent, controls patterns of water circulation and biophysical aspects relevant…
View article: Longer and more frequent marine heatwaves in the Western Baltic Sea
Longer and more frequent marine heatwaves in the Western Baltic Sea Open
Marine heatwaves (MHW) are globally occurring events observed with potentially long-lasting ecological effects and socio-economic repercussions. The Western Baltic Sea (WBS) is a transitional region between the North Sea and the Baltic Pro…
View article: CAVIAR: Climate variability of the Baltic Sea area and the response of the general circulation of the Baltic Sea to climate variability
CAVIAR: Climate variability of the Baltic Sea area and the response of the general circulation of the Baltic Sea to climate variability Open
No abstracts are to be cited without prior reference to the author.The warming trend for the entire globe (1850–2005) is 0.04°C per decade. A specific warming period started around 1980 and continues at least until 2005, with a temperature…
View article: CAVIAR: Climate Variability of the Baltic Sea area
CAVIAR: Climate Variability of the Baltic Sea area Open
No abstracts are to be cited without prior reference to the author.Climate Variability of the Baltic Sea area
View article: Drift Patterns Of Cod Early Life Stages In The Baltic: Exchange Between The Western And Eastern Stock, A Physical Modelling Approach
Drift Patterns Of Cod Early Life Stages In The Baltic: Exchange Between The Western And Eastern Stock, A Physical Modelling Approach Open
No abstracts are to be cited without prior reference to the author.In order to clarify mechanisms influencing reproductive success of Baltic cod a modelling exercise was performed to examine the effect of the wind driven circulation on th…
View article: German Marine Seismic Data Access
German Marine Seismic Data Access Open
Reflection seismic data are the prime source of information for the subsurface structure as they provide the highest resolution of any geophysical technique. As such they have been used for a large variety of academic and commercial purpos…
View article: Variations of temperature, salinity and oxygen of the Baltic Sea for the period 1950 to 2020
Variations of temperature, salinity and oxygen of the Baltic Sea for the period 1950 to 2020 Open
Highlights
\n• Detailed analysis of temperature, salinity and oxygen variations in the Baltic Sea for the period 1950 to 2020.
\n• Linear trend of SST of 0.4°C per decade.
\n• Trend in SST follows closely the air temperature variation.
\n•…
View article: From local to global: Community services in interdisciplinary research data management
From local to global: Community services in interdisciplinary research data management Open
GEOMAR research covers a unique range of physical, chemical, biological and geological ocean processes. The department Digital Research Services develops and provides advice and tools to support scientific data workflows, including metadat…
View article: Changing impact of the large-scale atmospheric circulation on the regional climate variability of the Baltic Sea for the period 1950-2022
Changing impact of the large-scale atmospheric circulation on the regional climate variability of the Baltic Sea for the period 1950-2022 Open
A detailed assessment of climate variability of the Baltic Sea area for the period 1958-2009 (Lehmann et al. 2011) revealed that recent changes in the warming trend since the mid-1980s, were associated with changes in the large-scale atmos…
View article: Changing impact of the large-scale atmospheric circulation on the regional climate variability of the Baltic Sea in winters 1950/51-2020/21
Changing impact of the large-scale atmospheric circulation on the regional climate variability of the Baltic Sea in winters 1950/51-2020/21 Open
<p>A detailed assessment of climate variability of the Baltic Sea area for the period 1958-2009 (Lehmann et al. 2011) revealed that recent changes in the warming trend since the mid-1980s, were associated with changes in the large-sc…
View article: Climate change in the Baltic Sea region: a summary
Climate change in the Baltic Sea region: a summary Open
Based on the Baltic Earth Assessment Reports of this thematic issue in Earth System Dynamics and recent peer-reviewed literature, current knowledge of the effects of global warming on past and future changes in climate of the Baltic Sea re…
View article: Salinity dynamics of the Baltic Sea
Salinity dynamics of the Baltic Sea Open
In the Baltic Sea, salinity and its large variability, both horizontal and vertical, are key physical factors in determining the overall stratification conditions. In addition to that, salinity and its changes also have large effects on va…
View article: Reply on RC2
Reply on RC2 Open
Abstract. In the Baltic Sea, salinity and its large variability, both horizontal and vertical, are key physical factors in determining the overall stratification conditions. In addition to that, salinity and its changes also have large eff…
View article: Reply on RC1
Reply on RC1 Open
Abstract. In the Baltic Sea, salinity and its large variability, both horizontal and vertical, are key physical factors in determining the overall stratification conditions. In addition to that, salinity and its changes also have large eff…
View article: Comment on esd-2021-15
Comment on esd-2021-15 Open
Abstract. In the Baltic Sea, salinity and its large variability, both horizontal and vertical, are key physical factors in determining the overall stratification conditions. In addition to that, salinity and its changes also have large eff…
View article: Climate Change in the Baltic Sea Region: A Summary
Climate Change in the Baltic Sea Region: A Summary Open
Based on the Baltic Earth Assessment Reports of this thematic issue in Earth System Dynamics and recent peer-reviewed literature, current knowledge about the effects of global warming on past and future changes in climate of the Baltic Sea…
View article: Salinity dynamics of the Baltic Sea
Salinity dynamics of the Baltic Sea Open
In the Baltic Sea, salinity and its large variability, both horizontal and vertical, are key physical factors in determining the overall stratification conditions. In addition to that, salinity and its changes also have large effects on va…
View article: A new distributed data analysis framework for better scientific collaborations
A new distributed data analysis framework for better scientific collaborations Open
<p>A common challenge for projects with multiple involved research institutes is a well-defined and productive collaboration. All parties measure and analyze different aspects, depend on each other, share common methods, and exchange…
View article: A new distributed data analysis framework for better scientific collaborations
A new distributed data analysis framework for better scientific collaborations Open
A common challenge for projects with multiple involved research institutes is a well-defined and productive collaboration. All parties measure and analyze different aspects, depend on each other, share common methods, and exchange the late…