Results 141 to 150 of about 38,278 (336)

Northern Eurasia Future Initiative (NEFI): facing the challenges and pathways of global change in the twenty-first century [PDF]

open access: yes, 2017
During the past several decades, the Earth system has changed significantly, especially across Northern Eurasia. Changes in the socio-economic conditions of the larger countries in the region have also resulted in a variety of regional environmental ...
Albrechtova, Jana   +23 more
core   +1 more source

The Role of Ballasting, Seawater Viscosity and Oxygen‐Dependent Remineralization for Export and Transfer Efficiencies in the Global Ocean

open access: yesGlobal Biogeochemical Cycles, Volume 39, Issue 5, May 2025.
Abstract The particulate organic carbon (POC) flux from the euphotic zone to the deep ocean is central to the biological carbon pump. It is typically evaluated using “export efficiency” and “transfer efficiency,” which reflect POC formation and sinking and carbon sequestration efficiency in the ocean's interior, respectively.
Onur Karakuş   +7 more
wiley   +1 more source

Ice Model Calibration Using Semi-continuous Spatial Data [PDF]

open access: yesarXiv, 2019
Rapid changes in Earth's cryosphere caused by human activity can lead to significant environmental impacts. Computer models provide a useful tool for understanding the behavior and projecting the future of Arctic and Antarctic ice sheets. However, these models are typically subject to large parametric uncertainties due to poorly constrained model input
arxiv  

Dissolved Organic Carbon in Coastal Waters: Global Patterns, Stocks and Environmental Physical Controls

open access: yesGlobal Biogeochemical Cycles, Volume 39, Issue 5, May 2025.
Abstract Dissolved organic carbon (DOC) in coastal waters is integral to biogeochemical cycling, but global and regional drivers of DOC are still uncertain. In this study we explored spatial and temporal differences in DOC concentrations and stocks across the global coastal ocean, and how these relate to temperature and salinity.
Christian Lønborg   +37 more
wiley   +1 more source

Theoretical Modeling of Secondary Microseisms Considering Source and Receiver Site Structures, With a Focus on Ocean‐Bottom Sediment Effects

open access: yesJournal of Geophysical Research: Solid Earth, Volume 130, Issue 5, May 2025.
Abstract Opposite‐direction oceanic wave interactions at the ocean surface generate microseisms between 0.1 and ∼ ${\sim} $0.5 Hz, known as secondary microseisms (SM). SM recordings aid in imaging Earth's crust, but they also impede monitoring seismic signals due to tectonic activities.
Zongbo Xu   +3 more
wiley   +1 more source

Glacier data assimilation on an Arctic glacier: Learning from large ensemble twin experiments [PDF]

open access: yesarXiv
Glacier modeling is crucial for quantifying the evolution of cryospheric processes. At the same time, uncertainties hamper process understanding and predictive accuracy. Here, we suggest improving glacier mass balance simulations for the Kongsvegen glacier in Svalbard through the application of Bayesian data assimilation techniques in a set of large ...
arxiv  

Quantitative implications of the secondary role of carbon dioxide climate forcing in the past glacial-interglacial cycles for the likely future climatic impacts of anthropogenic greenhouse-gas forcings [PDF]

open access: yesarXiv, 2007
A review of the recent refereed literature fails to confirm quantitatively that carbon dioxide (CO2) radiative forcing was the prime mover in the changes in temperature, ice-sheet volume, and related climatic variables in the glacial and interglacial periods of the past 650,000 years, even under the "fast response" framework where the convenient if ...
arxiv  

Dam‐Induced Alternations of Flow and Sediment Regimes in the Tibetan Plateau: An Example of the Yarlung Tsangpo River

open access: yesWater Resources Research, Volume 61, Issue 5, May 2025.
Abstract Dams heavily regulate the natural hydrological regimes, impacting on riverine ecosystem and local communities. Yet, the impacts of dams on flow and sediment alterations in the alpine basins, such as the Yarlung Tsangpo River with its immense hydropower potential, remain largely understudied due to limited fine‐scale hydrological records. Here,
Dongmei Zhao   +6 more
wiley   +1 more source

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