A5033593268- Methane Hydrates and Related Phenomena
- Arctic and Antarctic ice dynamics
- Geology and Paleoclimatology Research
- Marine and coastal ecosystems
- Ocean Acidification Effects and Responses
- Atmospheric and Environmental Gas Dynamics
- Groundwater and Isotope Geochemistry
- Marine Biology and Ecology Research
- Arctic and Russian Policy Studies
- Hydrocarbon exploration and reservoir analysis
- Cerebrospinal fluid and hydrocephalus
- CO2 Sequestration and Geologic Interactions
- Geological Studies and Exploration
- Cryospheric studies and observations
Helmholtz-Zentrum Hereon
2020-2025
Universität Hamburg
2022
Coastal Impact
2021
Dalhousie University
2020
Abstract This case study of Kongsfjorden, western coastal Svalbard, provides insights on how freshwater runoff from marine‐ and land‐terminating glaciers influences the biogeochemical cycles distribution patterns carbon, nutrients, trace elements in an Arctic fjord system. We collected samples water column at stations along axis proglacial river catchments, analyzed concentrations dissolved elements, together with as well alkalinity inorganic carbon. Statistical tools were applied to...
The Arctic Ocean and its coastal areas are especially vulnerable to climate change. Its ecosystem is rapidly changing in response temperature increase, loss of sea ice, freshwater input. However, the scientific community currently lacks sufficient information on mechanisms drivers behind biogeochemical cycling these additional inputs consequences that may arise for environment.This case study Kongsfjorden, western Svalbard, provides insights how runoff from marine- land-terminating glaciers...
Early studies revealed relationships between barium (Ba), particulate organic carbon and silicate, suggesting applications for Ba as a paleoproductivity tracer of modern ocean circulation.
Abstract Alkalinity generation from rock weathering modulates Earth’s climate at geological time scales. Although lithology is thought to dominantly control alkalinity globally, the role of other first-order controls appears elusive. Particularly challenging remains discrimination climatic and erosional influences. Based on global observations, here we uncover erosion rate in governing riverine alkalinity, accompanied by areal proportion carbonate, mean annual temperature, catchment area,...
Abstract. As a shelf-dominated basin, the Arctic Ocean and its biogeochemistry are heavily influenced by continental riverine sources. Radium isotopes (226Ra, 228Ra, 224Ra, 223Ra), transferred from sediments to seawater, making them ideal tracers of sediment–water exchange processes ocean mixing. two long-lived radium quartet, 226Ra 228Ra (226Ra with t1∕2 1600 years 5.8 years) can provide insight into water mass compositions, distribution patterns, as well mixing their associated timescales...
Earth and Space Science Open Archive This preprint has been submitted to is under consideration at Journal of Geophysical Research - Oceans. ESSOAr a venue for early communication or feedback before peer review. Data may be preliminary.Learn more about preprints preprintOpen AccessYou are viewing the latest version by default [v1]Strong margin influence on Arctic Ocean barium cycle revealed Pan-Arctic synthesisAuthorsLaura M.WhitmoreiDAlan M.ShilleriDTristan JHorneriDYangXiangiDMaureen...
Abstract. As a shelf dominated basin, the Arctic Ocean and its biogeochemistry are heavily influenced by continental riverine sources. Radium isotopes (226Ra, 228Ra, 224Ra, 223Ra), transferred from sediments to seawater, making them ideal tracers of sediment-water exchange processes ocean mixing. 226Ra 228Ra two longer-lived Quartet t1/2 = 1600 y 5.8 y). Because their long half-lives they can provide insight into water mass compositions, distribution patterns, as well mixing associated...
<p>Alkalinity generation from rock weathering is thought to modulate the Earth’s climate at geological time scales. Here, we use global alkalinity data paired with consistent measurements of erosion rates develop an empirically-based model for riverine concentration, demonstrating impact both (i.e. rate) and temperature) on generation, globally. We show that carbonate rocks very responsive temperature flux ocean will be significantly altered by warming as early...
<p>The long-lived radium isotopes, <sup>226</sup>Ra (<em>t<sub>1/2</sub></em>= 1600 yrs.) and <sup>228</sup>Ra (<em>t<sub>1/2</sub></em> = 5.8 yrs.), are established shelf-sea tracers, capable of discerning key water-mass compositions distribution patterns from source to sea. Within the North Sea, has not only...
<p>The North Sea’s location has made it an object of oceanographic study for over 150 years. But within the more recent past, this shelf sea with its strong continental pump system captivated science’s attention a different reason: artificial ocean alkalinization (AOA). Through enhancement metabolic pathways or addition dissolved alkaline minerals into to draw down atmospheric CO<sub>2</sub>, AOA seems offer compelling...