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Anzeige der Dokumente 2798-2817 von 6904
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High-resolution observations of the solar photosphere and chromosphere
(Univ. Freiburg (Breisgau), 2007)Observations of the sun are almost always impaired by the turbulent motion of air in Earth's atmosphere. The turbulence would limit the theoretical resolution of modern large telescopes to that of amateur telescopes without ... -
Higher subsoil carbon storage in species-rich than species-poor temperate forests
(Environmental Research Letters, 2014)Forest soils contribute ca. 70% to the global soil organic carbon (SOC) pool and thus are an important element of the global carbon cycle. Forests also harbour a large part of the global terrestrial biodiversity. It is ... -
Higher than present global mean sea level recorded by an Early Pliocene intertidal unit in Patagonia (Argentina)
; ; ; ; ; ; ; ; (Communications Earth & Environment, 2020-12-23)
Reconstructions of global mean sea level from earlier warm periods in Earth’s history can help constrain future projections of sea level rise. Here we report on the sedimentology and age of a geological unit in central ... -
Highlighting Theodor W. Engelmann's “Farbe und Assimilation” [Color and Assimilation]
(Limnology and Oceanography Bulletin, 2021-10-22)
In 1883, Theodor Wilhelm Engelmann, a German scientist, wrote his essay “color and assimilation” (Ger.: “Farbe und Assimilation”) describing the state of the art in photosynthesis research, his recent findings, and further ... -
Highly isotopically depleted isoprenoids - molecular markers for ancient methane venting
; ; Seifert, Richard; Wehrung, Patrick; ; Michaelis, Walter (Geochimica et cosmochimica acta, 1999)
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Highly isotopically depleted isoprenoids ; molecular markers for ancient methane venting
; ; Seifert, Richard; Wehrung, Patrick; ; Michaelis, Walter (Geochimica et cosmochimica acta, 1999)
We propose that organic compounds found in a Miocene limestone from Marmorito (Northem Italy) are source markers for organic matter present in aneient methane vent systems (cold seeps). The limestone contains high ... -
Highly resolved modeling of extreme wind speed in North America and Europe
; ; ; (Atmospheric Science Letters, 2022-02-17)
High wind speed (U) is one of the most dangerous natural hazards in North America and Europe. As a result, spatially explicit, statistical estimation of extreme U is of particular relevance for many sectors. However, the ... -
High‐Frequency (6 Hz) PKPab Precursors and Their Sensitivity to Deep Earth Heterogeneity
Sens‐Schönfelder, C.; Bataille, K.; (Geophysical Research Letters, 2021-01-22)
We present observations on a new precursory phase of seismic waves scattered in the deep Earth. This phase arrives prior to the PKPab wave at epicentral distances larger than 155°, and we call it PKPab precursor. We show ... -
High‐Resolution Aircraft Observations of Turbulence and Waves in the Free Atmosphere and Comparison With Global Model Predictions
; ; (Journal of Geophysical Research: Atmospheres, 2022-08-23)
High‐resolution flight data obtained from in situ measurements in the free atmosphere aboard the High Altitude and Long Range Research Aircraft (HALO) are used to determine eddy dissipation rates along extended flights ... -
High‐resolution facies analysis of a coastal sabkha in the eastern Gulf of Salwa (Qatar): A spatio‐temporal reconstruction
; ; ; ; ; (Sedimentology, 2021-10-12)
Abstract Sabkhas are key landforms along the southern coast of the Arabian Gulf and represent modern analogues for depositional and diagenetic processes controlling properties and quality of ancient hydrocarbon‐bearing ... -
High‐resolution in situ stable isotope measurements reveal contrasting atmospheric vapour dynamics above different urban vegetation
; ; ; ; (Hydrological Processes, 2023-09-14)
Abstract We monitored stable water isotopes in liquid precipitation and atmospheric water vapour ...
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High‐Resolution Integrated Transport Model for Studying Surface Water–Groundwater Interaction
Broecker, Tabea; Sobhi Gollo, Vahid; Fox, Aryeh;; Nützmann, Gunnar; Arnon, Shai; Hinkelmann, Reinhard (Groundwater, 2021-01-11)
Transport processes that lead to exchange of mass between surface water and groundwater play a significant role for the ecological functioning of aquatic systems, for hydrological processes and for biogeochemical ... -
High‐Resolution Observations of Turbulence Distributions Across Tropopause Folds
; ; ; Lübken, Franz‐Josef (Journal of Geophysical Research: Atmospheres, 2021-03-22)
In this study, we interpret two vertical turbulence measurements. We acquired these uninterrupted high‐resolution dissipation rate profiles with the balloon‐borne instrument LITOS (Leibniz Institute Turbulence Observations ... -
High‐Resolution Simulations of the Plume Dynamics in an Idealized 79°N Glacier Cavity Using Adaptive Vertical Coordinates
; ; ; ; (Journal of Advances in Modeling Earth Systems, 2023-10-02)
Abstract For better projections of sea level rise, two things are needed: an improved understanding ...
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High‐resolution XEOL spectroscopy setup at the X‐ray absorption spectroscopy beamline P65 of PETRA III
(Journal of Synchrotron Radiation, 2022-08-11)A newly designed setup to perform steady‐state X‐ray excited optical luminescence (XEOL) spectroscopy and simultaneous XEOL and X‐ray absorption spectroscopy characterization at beamline P65 of PETRA III is described. The ... -
High‐Resolution, Basin‐Scale Simulations Reveal the Impact of Intermediate Zonal Jets on the Atlantic Oxygen Minimum Zones
(Journal of Advances in Modeling Earth Systems, 2023-02-20)
Eastward zonal jets at intermediate depths of 300–800 m connect the oxygen‐rich western boundary of the Atlantic basin with the oxygen minimum zones (OMZs) on the eastern boundary. They are not well represented in climate ... -
High‐temperature treatments of niobium under high vacuum, dilute air‐ and nitrogen‐atmospheres as investigated by in situ X‐ray absorption spectroscopy
(Journal of Synchrotron Radiation, 2020-12-18)Niobium metal foils were heat‐treated at 900°C under different conditions and in situ investigated with time‐resolved X‐ray absorption fine‐structure (EXAFS and XANES) measurements. The present study aims to mimic the ... -
Hillslope Sediment Supply Limits Alluvial Valley Width
; ; (AGU Advances, 2022-10-31)
River‐valley morphology preserves information on tectonic and climatic conditions that shape landscapes. Observations suggest that river discharge and valley‐wall lithology are the main controls on valley width. Yet, current ... -
Himalayan hazard cascades – modern and medieval outburst floods in Pokhara, Nepal
; ; ; ; ; ; ; (Earth Surface Processes and Landforms, 2023-01-22)
Abstract In May 2012, a sediment‐laden flood along the Seti Khola (= river) caused 72 fatalities ...
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Hindered Trench Migration Due To Slab Steepening Controls the Formation of the Central Andes
; ; ; (Journal of Geophysical Research: Solid Earth, 2022-12-08)
The formation of the Central Andes dates back to ∼50 Ma, but its most pronounced episode, including the growth of the Altiplano‐Puna Plateau and pulsatile tectonic shortening phases, occurred within the last 25 Ma. The ...
