Sebastian Wagner results 38
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The Last Glacial Maximum (LGM) and Last Interglacial (LIG) provide insights into the response of the North Atlantic–European climate variability to strongly contrasting boundary conditions. Using six CMIP6/PMIP4 models, we compare temperature–precipitation patterns, atmospheric circulation, and variability, with emphasis on the North Atlantic Oscillation (NAO). Across climate states, the leading modes of wintertime sea-level p...
Species-specific flight behavior of migrating and non-migrating European psyllid speciesNARA Subscribed
Psyllids are small (2.5–4 mm), phytophagous, plant sap-feeding insects. Several species, in the genus Cacopsylla , are known as pests of fruit trees in Europe and adjacent countries. Interestingly, some species are multivoltine, such as the pear psyllids Cacopsylla pyri and C. pyricola , while closely related psyllid species of pear, plum, and apple ( C. pyrisuga , C. pruni , and C. picta, resp.) are univoltine and migrate bet...
Per- and polyfluoroalkyl substances (PFAS) constitute a group of anthropogenic compounds that are ubiquitously distributed in the environment due to their widespread use in various industrial processes and consumer products. Among foodstuffs of animal origin, wild boar ( Sus scrofa ) livers may contain particularly high levels of PFAS. Additionally, wild boars have been identified as suitable bioindicators and are used by Germ...
Emergence of a Resource Acquisition Trade‐off at the Community Scale during Environmental ChangeNARA Subscribed
Biomass‐weighted mean traits of a community's constituent species are a useful tool to assess environmental filtering in community function in response to environmental change. We show that annually averaged phytoplankton community function, expressed by the community mean traits phosphate and light affinity, responded strongly and reversibly to long‐term changes in nutrient supply over a 42‐year period of eutrophication and r...
Global tree-ring response and inferred climate variation following the mid-thirteenth century Samalas eruptionNARA Subscribed
The largest explosive volcanic eruption of the Common Era in terms of estimated sulphur yield to the stratosphere was identified in glaciochemical records 40 years ago, and dates to the mid-thirteenth century. Despite eventual attribution to the Samalas (Rinjani) volcano in Indonesia, the eruption date remains uncertain, and the climate response only partially understood. Seeking a more global perspective on summer surface tem...
Sedimentation history of Lake Taymyr, Central Russian Arctic, since the Last Glacial MaximumNARA Subscribed
Hydro‐acoustic and seismic data and 2‐ to 16‐m‐long sediment cores from the central area of Lake Taymyr (Taymyr Peninsula, central Russian Arctic) were investigated to reconstruct its sedimentation history. Granulometric, chronological, geochemical and biological data from the sediment cores reveal two lowstands and two highstands of the lake level, which is today located ca. 5 m above sea level during summer. Our study confir...
Highly variable sediment deposition in Lake Imandra, NW Russia, since the Late PleistoceneNARA Subscribed
To understand the dynamics of sediment deposition and the potential influences of complex current systems in large lakes, Lake Imandra (Kola Peninsula) has been investigated. Seismic and echo‐sounder data of the central part of Bolshaya Imandra reveal the sediment architecture in unprecedented detail. In addition, the sediment core data indicate highly variable depositional processes since the Late Pleistocene. The complex mor...
Climate and environmental history at Lake Levinson‐Lessing, Taymyr Peninsula, during the last 62 kyrNARA Subscribed
The 45.95 m‐long sediment succession shown in core Co1401 from Lake Levinson‐Lessing allows the reconstruction of the largely unexplored environmental and climatic history of the Taymyr Peninsula of the past 62 kyr. The core was analysed with a multidisciplinary approach including lithological, granulometric, geochemical and pollen analyses. The proxy data indicate a relatively stable, herb‐dominated environment with only subt...
The observed recent surface air temperature development across Svalbard and concurring footprints in local sea ice coverNARA Subscribed
The Svalbard archipelago in the Arctic North Atlantic is experiencing rapid changes in the surface climate and sea ice distribution, with impacts for the coupled climate system and the local society. This study utilizes observational data of surface air temperature (SAT) from 1980–2016 across the whole Svalbard archipelago, and sea ice extent (SIE) from operational sea ice charts to conduct a systematic assessment of climatolo...
Journal ClubNARA Subscribed
Aim Large tropical trees form the interface between ground and airborne observations, offering a unique opportunity to capture forest properties remotely and to investigate their variations on broad scales. However, despite rapid development of metrics to characterize the forest canopy from remotely sensed data, a gap remains between aerial and field inventories. To close this gap, we propose a new pan‐tropical model to predic...
Summary Dimethylsulfoniopropionate ( DMSP ) is an abundant osmolyte and anti‐stress compound produced primarily in marine ecosystems. After its release into the environment, microorganisms can exploit DMSP as a source of sulfur and carbon, or accumulate it as an osmoprotectant. However, import systems for this ecophysiologically important compatible solute, and its stress‐protective properties for microorganisms that do not pr...