A5068998315- Atmospheric and Environmental Gas Dynamics
- Methane Hydrates and Related Phenomena
- Marine and coastal ecosystems
- Oceanographic and Atmospheric Processes
- Arctic and Antarctic ice dynamics
- Ocean Acidification Effects and Responses
- Environmental Monitoring and Data Management
- Atmospheric Ozone and Climate
- Coastal wetland ecosystem dynamics
- Coastal and Marine Management
- Scientific Computing and Data Management
- Climate change and permafrost
- Climate variability and models
- Isotope Analysis in Ecology
- Marine and environmental studies
- Atmospheric chemistry and aerosols
- Geology and Paleoclimatology Research
- Hydrocarbon exploration and reservoir analysis
- Geophysics and Gravity Measurements
- Aquatic and Environmental Studies
- Meteorological Phenomena and Simulations
- Distributed and Parallel Computing Systems
- Spacecraft and Cryogenic Technologies
- Geological Studies and Exploration
- Water Quality Monitoring Technologies
Helmholtz-Zentrum Hereon
2014-2025
University of California, Los Angeles
2003-2020
Philips (United Kingdom)
2020
California Institute of Technology
2011
Planetary Science Institute
2003
Alfred-Wegener-Institut Helmholtz-Zentrum für Polar- und Meeresforschung
2003
Oxygen (O(2)) is a critical constraint on marine ecosystems. As oceanic O(2) falls to hypoxic concentrations, habitability for aerobic organisms decreases rapidly. We show that the spatial extent of hypoxia highly sensitive small changes in ocean's content, with maximum responses at suboxic concentrations where anaerobic metabolisms predominate. In model-based reconstructions historical oxygen changes, world's largest zone, Pacific Ocean, varies size by factor 2. This attributable...
Long‐term trends and average seasonal variability in the upper ocean carbon cycle are investigated at Station ALOHA, site of U.S. JGOFS Hawaii Ocean Time series program (HOT), on basis a 14‐year time (1988–2002) dissolved inorganic (DIC), alkalinity, 13 C/ 12 C ratio DIC data. Salinity‐normalized (sDIC) computed oceanic p CO 2 show distinct upward 1.2 ± 0.1 μmol kg −1 yr 2.5 μatm , respectively, while isotopic (expressed as δ oc ) decreases mean rate −0.027 0.001‰ . More than half rates...
Using an Observing System Simulation Experiment (OSSE), we investigate the impact of JAXA Greenhouse gases SATellite ‘IBUKI’ (GOSAT) sampling on estimation terrestrial biospheric flux with NASA Carbon Monitoring Flux (CMS-Flux) and attribution strategy. The simulated observations in OSSE use actual column carbon dioxide (XCO2 ) b2.9 retrieval sensitivity quality control for year 2010 processed through Atmospheric CO2 Observations from Space algorithm. CMS-Flux is a variational inversion...
Abstract Quantifying variability in the ocean carbon sink remains problematic due to sparse observations and spatiotemporal surface p CO 2 . To address this challenge, we have updated improved ECCO‐Darwin, a global biogeochemistry model that assimilates both physical biogeochemical observations. The consists of an adjoint‐based circulation estimate from Estimating Circulation Climate Ocean (ECCO) consortium ecosystem developed by Massachusetts Institute Technology Darwin Project. In addition...
The inventory and variability of oceanic dissolved inorganic carbon (DIC) is driven by the interplay physical, chemical, biological processes. Quantifying spatiotemporal these drivers crucial for a mechanistic understanding ocean sink its future trajectory. Here, we use Estimating Circulation Climate Ocean-Darwin biogeochemistry state estimate to generate global-ocean, data-constrained DIC budget investigate how spatial seasonal-to-interannual in three-dimensional circulation, air-sea CO2...
Abstract. The Coastal Observing System for Northern and Arctic Seas (COSYNA) was established in order to better understand the complex interdisciplinary processes of northern seas coasts a changing environment. Particular focus is given German Bight North Sea as prime example heavily used coastal area, Svalbard an coast that under strong pressure due global change.The COSYNA automated observing modelling system designed monitor real-time conditions provide short-term forecasts, data, data...
Abstract NASA's Carbon Monitoring System Flux Pilot Project (FPP) was designed to better understand contemporary carbon fluxes by bringing together state‐of‐the art models with remote sensing data sets. Here we report on simulations using Goddard Earth Observing Model, version 5 (GEOS‐5) which used evaluate the consistency of two different sets observationally informed land and ocean atmospheric CO 2 records. Despite observation inputs, average difference in annual terrestrial biosphere flux...
Abstract. We describe FESOM-C, the coastal branch of Finite-volumE Sea ice – Ocean Model (FESOM2), which shares with FESOM2 many numerical aspects, in particular its finite-volume cell-vertex discretization. Its dynamical core differs implementation time stepping, use a terrain-following vertical coordinate, and formulation for hybrid meshes composed triangles quads. The first two distinctions were critical coding FESOM-C as an independent branch. mesh capability improves efficiency, since...
Abstract Estuaries regulate carbon cycling along the land‐ocean continuum and thus influence export to ocean, global budgets. The Elbe Estuary in Germany has been altered by large anthropogenic perturbations, such as widespread heavy metal pollution, minimally treated wastewater before 1980s, establishment of treatment plants after 1990s, an overall nutrient pollutant load reduction last three decades. Based on extensive evaluation key ecosystem variables, analysis available inorganic...
Abstract. Within the context of predicted and observed increase in droughts floods with climate change, large summer are likely to become more frequent. These extreme events can alter typical biogeochemical patterns coastal systems. The Elbe River flood June 2013 not only caused major damages several European countries but also generated large-scale changes estuary adjacent German Bight. high-frequency monitoring network within Coastal Observing System for Northern Arctic Seas (COSYNA)...
Nutrient and carbon dynamics within the river-estuary-coastal water systems are key processes in understanding flux of matter from terrestrial environment to ocean. Here, we analysed those by following a sampling approach based on travel time an advanced calculation nutrient fluxes tidal part. We started with nearly Lagrangian river (River Elbe, Germany; 580 km 8 days). After subsequent investigation estuary, followed plume raster German Bight (North Sea) using three ships simultaneously. In...
We investigate interannual variability of the upper ocean carbon cycle in subtropical North Pacific on basis a 14‐year time series (1988–2002) parameters from Station ALOHA, site U.S. JGOFS Hawaii Ocean Time program (HOT). The data reveal substantial near‐surface concentrations dissolved inorganic normalized to constant salinity (sDIC, peak‐to‐peak amplitude ±4 μmol kg −1 ), computed surface partial pressure CO 2 ( p , ±6 ppm), and 13 C/ 12 C ratio DIC (±0.07‰). A strong anticorrelation r =...
Abstract Modular Observation Solutions of Earth Systems (MOSES) is a novel observation system that specifically designed to unravel the impact distinct, dynamic events on long-term development environmental systems. Hydrometeorological extremes such as recent European droughts or floods 2013 caused severe and lasting damage. Modeling studies suggest abrupt permafrost thaw accelerate Arctic greenhouse gas emissions. Short-lived ocean eddies seem comprise significant share marine carbon uptake...
The goal of this study is to provide a universally applicable procedure for systematic evaluation in situ measured data from single sensors regarding quantifying the uncertainty measurement results. As determining an environmental parameter also depends on itself, focus here will be set variable water temperature first place. A separate analysis salinity and other follow later publications. With series planned manuscripts different parameters, we aim at providing common understanding how...
The Kunming-Montreal Global Diversity Framework includes strategies to reduce biodiversity loss and restore degraded ecosystems. In Ghana, mangrove ecosystems are experiencing rapid degradation despite their ecological economic relevance coastal communities, efforts conserve areas. Studies on the interrelationship between mangroves sustainable livelihoods for indigenous communities scant although they interdependent. This study employed a co-design transdisciplinary approach that involved...
The Helmholtz Association's Research Field Earth and Environment the German Marine Alliance (DAM)—a partnership between federal government, five northern states, 25 research-oriented organizations—have come together to connect distributed data infrastructures of their members partners. Their collaboration aims create a Data Ecosystem, facilitating centralized access marine information. This ecosystem will provide open global FAIR (Findable, Accessible, Interoperable, Reusable) from science....
Cabled coastal observatories are often seen as future-oriented marine technology that enables science to conduct observational and experimental studies under water year round, independent of physical accessibility the target area. Additionally, availability (unrestricted) electricity an Internet connection allows operation complex setups sensor systems for longer periods time, thus creating a kind laboratory beneath water. After successful several decades in terrestrial atmospheric research...
Few Southern Hemisphere time series measurements of biogeochemical tracers are available, and this scarcity is a major impediment in understanding the biological physical processes underlying oceanic carbon nutrient cycles vast parts global oceans. We make use bi‐monthly carbonate parameters from 1998 to 2010 upper Subantarctic Surface Water east New Zealand's South Island at 45.85°S 171.50°E investigate seasonal trends these species controlling their variability. This reveals positive...
Abstract. The German Bight was exposed to record high riverine discharges in June 2013, as a result of flooding the Elbe and Weser rivers. Several anomalous observations suggested that hydrodynamical biogeochemical states system were impacted by this event. In study, we developed model coupled it with previously introduced high-resolution southern North Sea order better characterize these impacts gain insight into underlying processes. Performance assessed using an extensive set situ...
In 2018, Europe experienced an unprecedented heatwave and drought, especially in central northern Europe, which caused decreased terrestrial production affected ecosystem health. this study, the effects of event on marine environment are investigate, with a focus biogeochemical response German Bight North Sea. Using time series data from FerryBoxes, research cruises, monitoring programs remote sensing we compare conditions 2018 to climatological values. We find that (1) rapid warming surface...
Interhemispheric signal transmission in the Atlantic Ocean connects deep water production regions of both hemispheres. The nature these interactions and large‐scale responses to perturbations on timescales years millennia have been investigated using a global three‐dimensional ocean general circulation model coupled dynamic‐thermodynamic sea ice model. reproduces many aspects today's oceanic circulation. A set experiments shows sensitivity changes different surface boundary conditions....
A thorough and reliable assessment of changes in sea surface water temperatures (SSWTs) is essential for understanding the effects global warming on long-term trends marine ecosystems their communities. The first temperature measurements were established almost a century ago, especially coastal areas, some them are still operation. However, while earlier times these done by hand every day, current environmental observation stations (ELTOS) often fully automated integrated cabled underwater...