Auflistung nach Schlagwort "modeling"
Anzeige der Dokumente 1-20 von 25
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A New Population of Ultra‐Relativistic Electrons in the Outer Radiation Zone
; ; ; ; ; ; (Journal of Geophysical Research: Space Physics, 2022-05-09)
Van Allen Probes measurements revealed the presence of the most unusual structures in the ultra‐relativistic radiation belts. Detailed modeling, analysis of pitch angle distributions, analysis of the difference between ... -
Abrupt Climate and Weather Changes Across Time Scales
; ; ; ; (Paleoceanography and Paleoclimatology, 2020)
The past provides evidence of abrupt climate shifts and changes in the frequency of climate and weather extremes. We explore the nonlinear response to orbital forcing and then consider climate millennial variability down ... -
Atmospheric CO2 Concentration Based on Boron Isotopes Versus Simulations of the Global Carbon Cycle During the Plio‐Pleistocene
(Paleoceanography and Paleoclimatology, 2023-02-21)
Atmospheric carbon dioxide concentrations (pCO2) beyond ice core records have been reconstructed from δ11B derived from planktic foraminifera found in equatorial sediment cores. Here, I applied a ... -
Bayesian Quantification and Reduction of Uncertainties in 3D Geomechanical‐Numerical Models
; (Journal of Geophysical Research: Solid Earth, 2022-12-29)
The distance to failure of the upper crustal rock in the prevalent stress field is of importance to better understand fault reactivation by natural and induced processes as well as to plan and manage georeservoirs. In ... -
Carbon Dioxide and Methane Release Following Abrupt Thaw of Pleistocene Permafrost Deposits in Arctic Siberia
; ; ; ; ; ; ; ; ; (Journal of Geophysical Research: Biogeosciences, 2021-11-01)
The decomposition of thawing permafrost organic matter (OM) to the greenhouse gases (GHG) carbon dioxide (CO2) and methane forms a positive feedback to global climate change. Data on in situ GHG fluxes from thawing permafrost ... -
Constraining Uncertainty in Projected Gross Primary Production With Machine Learning
; ; Camps‐Valls, Gustau; Friedlingstein, Pierre; ; (Journal of Geophysical Research: Biogeosciences, 2020-11-21)
The terrestrial biosphere is currently slowing down global warming by absorbing about 30% of human emissions of carbon dioxide (CO2). The largest flux of the terrestrial carbon uptake is gross primary production (GPP) ... -
Efficiency and Accuracy of Micro-Macro Models for Mineral Dissolution
; ; ; (Water Resources Research, 2020)
Micro-macro models for dissolution processes are derived from detailed pore-scale models applying upscaling techniques. They consist of flow and transport equations at the scale of the porous medium (macroscale). Both ... -
Exploring the Iron-Binding Potential of the Ocean Using a Combined pH and DOC Parameterization
; ; (Global Biogeochemical Cycles, 2020)
The major part of dissolved iron (DFe) in seawater is bound to organic matter, which prevents iron from adsorptive removal by sinking particles and essentially regulates the residence time of DFe and its availability for ... -
Fuzzy map comparisons enable objective hydro‐morphodynamic model validation
; ; ; (Earth Surface Processes and Landforms, 2021-11-18)
Numerical modeling represents a state‐of‐the‐art technique to simulate hydro‐morphodynamic processes in river ecosystems. Numerical models are often validated based on observed topographic change in the form of pixel ... -
Hyper-Resolution Continental-Scale 3-D Aquifer Parameterization for Groundwater Modeling
; ; Maxwell, Reed (Water Resources Research, 2020)
Groundwater is the world's most important freshwater resource. Despite this importance, groundwater flow and interactions between groundwater and other parts of the hydrological cycle are often neglected or simplified in ... -
Impact of Cyclonic Wind Anomalies Caused by Massive Winter Sea Ice Retreat in the Barents Sea on Atlantic Water Transport Toward the Arctic: A Model Study
; ; ; ; (Journal of Geophysical Research: Oceans, 2023-03-15)
The Arctic is warming much faster than the global average. This is known as Arctic Amplification and is caused by feedbacks in the local climate system. In this study, we explore a previously proposed hypothesis that an ... -
Impacts of the Desiccation of the Aral Sea on the Central Asian Dust Life‐Cycle
; ; (Journal of Geophysical Research: Atmospheres, 2022-11-06)
The formation of the Aralkum (Aral Desert), following the severe desiccation of the former Aral Sea since the 1960s, has created what may be regarded as one of the world's most significant anthropogenic dust sources. In ... -
Learning by Doing: Seasonal and Diurnal Features of Tropical Precipitation in a Global‐Coupled Storm‐Resolving Model
;; ; (Geophysical Research Letters, 2022-12-26)
Using the global and coupled ICOsahedral Nonhydrostatic model with the Sapphire configuration (ICON‐S) and a grid spacing of 5 km, we describe seasonal and diurnal features of the tropical rainbelt and assess the limits ... -
Modeling the Microwave Emission of Snow on Arctic Sea Ice for Estimating the Uncertainty of Satellite Retrievals
; ; ; ; (Journal of Geophysical Research: Oceans, 2020)
Within a rapidly changing Arctic climate system, snow on sea ice is an important climate parameter. A common method to derive snow depth on an Arctic-wide scale is based on passive microwave satellite observations. However, ... -
Modeling the Transport and Deposition of 10Be Produced by the Strongest Solar Proton Event During the Holocene
; ; ; ; ; ; ; ; ; (Journal of Geophysical Research: Atmospheres, 2022-06-28)
Prominent excursions in the number of cosmogenic nuclides (e.g., 10Be) around 774 CE/775 document the most severe solar proton event (SPE) throughout the Holocene. Its manifestation in ice cores is valuable for geochronology, ... -
Modeling urban regions: Comparing random forest and support vector machines for cellular automata
; ; Krelaus, Leonie; (Transactions in GIS, 2021-05-05)
Cellular automaton (CA) are important tools that provide insight into urbanization dynamics and possible future patterns. The calibration process is the core theme of these models. This study compares the performance of ... -
Multiphysics Modeling of a Brittle-Ductile Lithosphere: 2. Semi-brittle, Semi-ductile Deformation and Damage Rheology
; (Journal of Geophysical Research: Solid Earth, 2020)
The brittle-ductile transition is a domain of finite extent characterized by high differential stress where both brittle and ductile deformation are likely to occur. Understanding its depth location, extent, and stability ... -
Offshore Freshened Groundwater in Continental Margins
; ; ; ; ; ; ; ; ; ; ; ; ; ; ; Martin‐Nagle, Renée; ; ; ; ; Trembath‐Reichert, Elizabeth; ; ; (Reviews of Geophysics, 2021-01-04)
First reported in the 1960s, offshore freshened groundwater (OFG) has now been documented in most continental margins around the world. In this review we compile a database documenting OFG occurrences and analyze it to ... -
ogs5py: A Python‐API for the OpenGeoSys 5 Scientific Modeling Package
Müller, Sebastian; Zech, Alraune; (Groundwater, 2020-06-16)
High‐performance numerical codes are an indispensable tool for hydrogeologists when modeling subsurface flow and transport systems. But as they are written in compiled languages, like C/C++ or Fortran, established software ... -
Partitioning the Uncertainty of Ensemble Projections of Global Glacier Mass Change
; ; Anderson, Brian; ; Champollion, Nicolas; ; ; ; Kraaijenbrink, Philip; Malles, Jan-Hendrik; ; Radi?, Valentina; ; ; Shannon, Sarah; van de Wal, Roderik; (Earth's Future, 2020)
Glacier mass loss is recognized as a major contributor to current sea level rise. However, large uncertainties remain in projections of glacier mass loss on global and regional scales. We present an ensemble of 288 glacier ...
