Auflistung nach Titel
Anzeige der Dokumente 1672-1691 von 7025
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Directionality of the Martian Surface Radiation and Derivation of the Upward Albedo Radiation
; ; ; ; ; ; ; ; ; ; (Geophysical Research Letters, 2021-07-31)
Since 2012 August, the Radiation Assessment Detector (RAD) on the Curiosity rover has been characterizing the Martian surface radiation field which is essential in preparation for future crewed Mars missions. RAD observed ... -
Direct‐Push Color Logging Images Spatial Heterogeneity of Organic Carbon in Floodplain Sediments
; ; ; ; (Journal of Geophysical Research: Biogeosciences, 2020-12-10)
In soils and sediments, large amounts of total organic carbon (TOC) mark reducing conditions. As dark sediment colors are good predictors for high‐TOC zones, they indicate hot spots of biogeochemical turnover and microbial ... -
Discretization of Sea Ice Dynamics in the Tangent Plane to the Sphere by a CD‐Grid‐Type Finite Element
; (Journal of Advances in Modeling Earth Systems, 2022-12-15)
We present a new discretization of sea ice dynamics on the sphere. The approach describes sea ice motion in tangent planes to the sphere. On each triangle of the mesh, the ice dynamics are discretized in a local coordinate ... -
Discriminating Aromatic Parent Compounds and Their Derivative Isomers in Ice Grains From Enceladus and Europa Using a Laboratory Analogue for Spaceborne Mass Spectrometers
; ; ; ; (Earth and Space Science, 2023-04-20)
Abstract Results from the Cassini‐Huygens space mission at Enceladus revealed a substantial ...
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Discrimination of different volcanic rock units by magnetic properties — geothermal field at Reykjanes peninsula (SW-Iceland)
Vahle, C.;; Dietze, F.; Audunsson, H. (11. Symposium "Tektonik, Struktur- und Kristallingeologie", 2006-03)
The geothermal field at Reykjanes peninsula is located at the boundary where the submarine Reykjanes Ridge passes over into the rift zone of southwestern Iceland. The geothermal field coincides with a magnetic low in ... -
Discrimination of TiO2 polymorphs in sedimentary and metamorphic rocks
(Contributions to Mineralogy and Petrology, 2010)Investigation by Raman spectroscopy of samples from different geological settings shows that the occurrence of TiO2 polymorphs other than rutile can hardly be predicted, and furthermore, the occurrence of anatase is more ... -
Discussing surface crack structures in the Schorfheide region, NE Germany
(E&G – Quaternary Science Journal; Vol.65)Express Report -
Disentangling the Impact of Catchment Heterogeneity on Nitrate Export Dynamics From Event to Long‐Term Time Scales
; ; ; ; ; (Water Resources Research, 2021-01-12)
Defining effective measures to reduce nitrate pollution in heterogeneous mesoscale catchments remains challenging when based on concentration measurements at the outlet only. One reason for this is our limited understanding ... -
Disk transport rates from Ti isotopic signatures of refractory inclusions
; ; ; (Meteoritics & Planetary Science, 2022-11-10)
The early solar system was a dynamic period during which the formation of early solids set into motion the process of planet building. Although both astrophysical observations and theoretical modeling demonstrate the ... -
Diskussion des Mittelwerts der Wasserleitfähigkeit k in Torfen
(TELMA - Berichte der Deutschen Gesellschaft für Moor- und Torfkunde; Band 46; 2016)Abstract: Calculating the mean of data of the water conductivity ks/f, the geometric mean, respectively the median, will be preferred, because of the mainly geometric distribution of the data. A thought experiment ... -
Diskussion von Gesetzen zur Wasserleitfähigkeit in Torfböden
(TELMA - Berichte der Deutschen Gesellschaft für Moor- und Torfkunde; Band 52; 2022)Gezeigt wird, dass die üblichen Strömungsgesetze, basierend auf Druck- und Geschwindigkeitsgradienten nach Darcy und Hagen-Poiseuille, zur Beschreibung der Strömung von Wasser in Porensystemen von Torfböden physikalischen ... -
Diskussionspapier zur guten fachlichen Praxis der landwirtschaftlichen Moorbodennutzung
; ; ;; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; (TELMA - Berichte der Deutschen Gesellschaft für Moor- und Torfkunde; Band 46; 2016)
Abstract: In Germany, more than 70% of peat soils are used for agriculture. Due to drainage and utilization, these peat soils have considerable environmental impact. Drainage-based use also leads to continuous peat ... -
Disordered sodium alkoxides from powder data: crystal structures of sodium ethoxide, propoxide, butoxide and pentoxide, and some of their solvates
(Acta Crystallographica Section B, 2021-01-25)The crystal structures of sodium ethoxide (sodium ethanolate, NaOEt), sodium n‐propoxide (sodium n‐propanolate, NaOnPr), sodium n‐butoxide (sodium n‐butanolate, NaOnBu) and sodium n‐pentoxide (sodium n‐amylate, NaOnAm) ... -
Dispersal, location of bloom initiation, and nutrient conditions determine the dominance of the harmful dinoflagellate Alexandrium catenella: A meta‐ecosystem study
;; (Limnology and Oceanography, 2021-09-27)
Harmful algal blooms (HABs) are globally increasing in number and spatial extent. However, their propagation dynamics along environmental gradients and the associated interplay of abiotic factors and biotic interactions ... -
Dissecting the host galaxies of active galactic nuclei at high angular resolution
(Univ. Köln, 2007)The work presented here is concerned with issues related to the interplay of galaxy structure and the accretion phenomenon onto supermassive black holes (SMBH), i.e. active galactic nuclei (AGN). There is statistical ... -
Dissolved gases in the deep North Atlantic track ocean ventilation processes
; ; ; ; ; ; ; ; ; ; ; ; ; ; ; (Proceedings of the National Academy of Sciences, 2023)
Gas exchange between the atmosphere and ocean interior profoundly impacts global climate and biogeochemistry. However, our understanding of the relevant physical processes remains limited by a scarcity of direct observations. ... -
Dissolved organic matter concentration, molecular composition, and functional groups in contrasting management practices of peatlands
; ; ; (Journal of Environmental Quality, 2021-09-25)
About 91,300 ha of peatlands has been rewetted in western Europe since the mid‐1990s. Still, it is unknown how long‐term rewetting alters the dissolved organic matter (DOM) concentration, molecular composition, and functional ... -
Dissolved Organic Matter Fluorescence as a Tracer of Upwelling and Microbial Activities in Two Cyclonic Eddies in the Eastern Tropical North Atlantic
; ; ; ; (Journal of Geophysical Research: Oceans, 2023-08-18)
Abstract Mesoscale eddies are frequently observed in the Eastern Tropical North Atlantic (ETNA), ...
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Dissolved Organic Matter in the Upwelling System off Peru: Imprints of Bacterial Activity and Water Mass Characteristics
; (Journal of Geophysical Research: Biogeosciences, 2021-06-09)
Microbial degradation of dissolved organic matter (DOM) contributes to the formation and preservation of oxygen minimum zones (OMZs) in the ocean, but information on the spatial distribution and molecular composition of ... -
Dissolved, Labile, and Total Particulate Trace Metal Dynamics on the Northeast Greenland Shelf
; ; ; ; ; ; ; ; (Global Biogeochemical Cycles, 2022-11-28)
We present high‐resolution profiles of dissolved, labile, and total particulate trace metals (TMs) on the Northeast Greenland shelf from GEOTRACES cruise GN05 in August 2016. Combined with radium isotopes, stable oxygen ...
