A5053593800- Methane Hydrates and Related Phenomena
- Marine and coastal ecosystems
- Coastal wetland ecosystem dynamics
- Geology and Paleoclimatology Research
- Geological and Geophysical Studies
- Atmospheric and Environmental Gas Dynamics
- Coastal and Marine Management
- Marine Biology and Ecology Research
- Aquatic Ecosystems and Phytoplankton Dynamics
- Coastal and Marine Dynamics
- Ocean Acidification Effects and Responses
- Isotope Analysis in Ecology
- demographic modeling and climate adaptation
- Coral and Marine Ecosystems Studies
- Cardiovascular Disease and Adiposity
- Diet and metabolism studies
- Water Quality and Pollution Assessment
- Radioactivity and Radon Measurements
- Arctic and Antarctic ice dynamics
- Groundwater and Isotope Geochemistry
- Mercury impact and mitigation studies
- Assistive Technology in Communication and Mobility
- Marine and fisheries research
- Marine Bivalve and Aquaculture Studies
- Fish biology, ecology, and behavior
University of Gothenburg
2020-2025
Universidade Federal de Santa Catarina
2017-2020
University of California, Santa Cruz
2018
The term 'Blue Carbon' was coined about a decade ago to highlight the important carbon sequestration capacity of coastal vegetated ecosystems. has paved way for development programs and policies that preserve restore these threatened ecosystems climate change mitigation. Blue research focused on quantifying stocks burial rates in sediments or accumulating as biomass. This focus habitat-bound led us losing sight mobile blue fraction. Oceans, largest active reservoir carbon, have become...
Abstract Mangroves and saltmarshes are biogeochemical hotspots storing carbon in sediments the ocean following lateral export (outwelling). Coastal seawater pH is modified by both uptake of anthropogenic dioxide natural processes, e.g., wetland inputs. Here, we investigate how mangroves influence coastal carbonate chemistry quantify contribution alkalinity dissolved inorganic (DIC) outwelling to blue budgets. Observations from 45 16 worldwide revealed that >70% intertidal wetlands more...
Mangrove soils are highly enriched in organic carbon. Tidal pumping drives seawater and oxygen into mangrove during flood tide releases carbon-rich porewater ebb tides. Here, we resolve semi-diurnal (flood/ebb tides), diel (day/night) weekly (neap/spring tides) drivers of porewater-derived CO2 fluxes two mangroves update global estimates emissions building on earlier observations from other sites. controlled pCO2 variability within the creeks. The highest values (2,585–6,856 µatm) 222Rn...
Coastal ecosystems play a major role in marine carbon budgets, but substantial uncertainties remain the sources and fluxes of coastal dioxide (CO 2 ). Here, we assess when, where, how submarine groundwater discharge (SGD) releases CO to shallow ecosystems. Time-series observations dissolved radon ( 222 Rn, natural tracer) across 40 systems from 14 countries revealed large SGD-derived fluxes. The mean partial pressure was 35 times higher than surface seawater. flux 148 ± 226 millimoles per...
Marine heatwaves (MHWs) are a major concern worldwide due to their increasing impacts in recent years, and these extreme events may trigger deoxygenation of coastal waters affected by sewage eutrophication. Here we investigate the combined effects MHWs nutrient enrichment on water quality biodiversity Bay Santa Catarina Island (Brazil). We used historical (1994–2020) sea surface temperature data from satellites situ physical, chemical biological parameters assess temporal trends. Oxygen...
Submarine groundwater discharge (SGD) is an important pathway for carbon and nutrients to the coastal ocean, sometimes exceeding river inputs. SGD fluxes can have implications long-term storage, ocean acidification nutrient dynamics. Here, we used radium (223Ra 226Ra) isotopes quantify SGD-derived of dissolved inorganic (DIC) organic (DOC) carbon, nitrate (NO3−), nitrite (NO2−), ammonium (NH4+) phosphate (PO43−) in a spring-fed bay Japan Sea. The average water residence times using...
Abstract Lateral fluxes (i.e., outwelling) of dissolved organic (DOC) and inorganic (DIC) carbon total alkalinity were estimated using radium isotopes at the groundwater, mangrove creek, continental shelf scales in Amazon region. Observations salinity creek indicated tidally driven groundwater exchange as main source carbon. Radium‐derived transport rates indicate that is exported out on timescales 22 ± 7 d. Bicarbonate was form (82% 11%) all samples, followed by DOC (13% 12%) CO 2 (5% 4%)....
Abstract We report high‐resolution observations of N 2 O sea‐air fluxes at six fjords spanning arctic, subarctic, and temperate climates. Icelandic Swedish were sources 97.6 ± 10.5 19.9 19.3 μg m −2 day −1 , respectively. These showed increasing concentrations toward the head. In contrast, a Greenland fjord exhibited net uptake −8.3 7.8 with decreasing concentration head fjord. Individual appear to have unique drivers such as temperature, salinity, chlorophyll, pH but no overarching driver...
Nitrous oxide (N2O) distribution and dynamics in high latitude fjords are relatively unknown. Surface water N2O concentrations were measured six located Sweden, Iceland, Greenland, which represent highly diverse environmental conditions terms of oxygen, eutrophication climate. This study provides one the few spatial resolution observations sea-air fluxes currently available fjords. The two Icelandic showed highest emissions (97.6±10.5 μg m⁻²...
Abstract Tidewater glaciers are highly vulnerable to climate change due warming from both atmospheric and seawater sources. Most tidewater rapidly retreating, but little is known about how glacial melting modifies coastal biogeochemical cycles. Here, we investigate carbonate nutrient dynamics fluxes in an expanding proglacial tidal lagoon connected Europe's largest glacier Iceland (Vatnajökull). The N:P:Si ratios (2:1:30) imply a system deficient nitrogen. large variations the freshwater...
Abstract Mangroves store significant amounts of carbon in both sediment and water. Methane (CH 4 ) is often produced anoxic, organic‐rich sediments during degradation released to overlying waters via porewater exchange. Yet, a portion CH can be oxidized CO 2 before emission. Here, we investigate whether oxidation impacts its emissions using high‐temporal resolution concentration stable isotope (δ 13 C‐CH observations collected over 14 tidal cycles Brazilian mangrove creeks with no river...
Abstract Mangrove‐dominated coastlines have high carbon sequestration capacity, but it remains unclear whether tidally outwelled is transformed within the coastal ocean or exported offshore. Here, we used radium isotopes ( 224 Ra and 223 Ra) to investigate outwelling in two mangrove seascapes Brazil across multiple spatial scales. We sampled porewaters define source composition, creek waters resolve tidal cycles, cross‐shelf transects trace seascapes. Radium were positively correlated with...
People with Developmental Disabilities (DD) often rely on other people to perform basic activities such as leaving the house and accessing public spaces. This problem, exaggerated by a decrease in community engagement, has been documented their sense of self-efficacy. Telepresence robots provide unique opportunity for DD access spaces, particularly those who are homebound or dependent others using transportation buying exhibit tickets. research evaluates use telepresence operated exploring...
ABSTRACT The Conceição Lagoon, located in south Brazil, is a semi-enclosed coastal ecosystem that has seasonal hypoxic and anoxic conditions its vertically stratified central region, characterized as site of retention mineralization organic matter. This study investigates water column dynamics the region Lagoon (CCL) relation to physical chemical variables, order understand events. Surface, halocline bottom waters were evaluated at three sampling sites along CCL. samples collected triplicate...
Mangrove soils are highly enriched in organic carbon. Tidal pumping drives seawater and oxygen into mangrove sediments during flood tide releases carbon-rich porewater ebb tides. Here, we resolve semi-diurnal (flood/ebb tides), diel (day/night) weekly (neap/spring tides) drivers of porewater-derived CO2 fluxes two mangroves update global estimates emissions. controlled pCO2 variability within the creeks. The highest values (2,585-6,856 µatm) 222Rn (2,315-6,159 dpm m-3) lowest pH (6.8-7.1)...
Mangroves have high CO2 sequestration capacity, storing large amounts of carbon on their biomass and sediments/soil. Mangrove is also transported to the ocean, i.e. outwelling or lateral fluxes, where it can be stored for long time scales. Here, we used radium isotopes (224Ra 223Ra) resolve alkalinity ocean from two mangrove seascapes in Brazil. We sampled porewaters define source composition, creek waters tidal cycles, performed transects away into continental shelf trace across seascape....