A5027752478- Arctic and Antarctic ice dynamics
- Marine and coastal ecosystems
- Methane Hydrates and Related Phenomena
- Ocean Acidification Effects and Responses
- Atmospheric and Environmental Gas Dynamics
- Marine Biology and Ecology Research
- Marine Bivalve and Aquaculture Studies
- Isotope Analysis in Ecology
- Cryospheric studies and observations
- Geological Studies and Exploration
- Geology and Paleoclimatology Research
- Microbial Community Ecology and Physiology
- Climate change and permafrost
- Food Industry and Aquatic Biology
- Marine and coastal plant biology
- Physiological and biochemical adaptations
- Oceanographic and Atmospheric Processes
- Polar Research and Ecology
- Species Distribution and Climate Change
- Marine and fisheries research
- Coral and Marine Ecosystems Studies
- Ecosystem dynamics and resilience
- Marine and environmental studies
- Influenza Virus Research Studies
- Marine Ecology and Invasive Species
Aarhus University
2016-2025
Royal Netherlands Institute for Sea Research
2024
Mediterranean Institute for Advanced Studies
2011-2019
Grønlands Naturinstitut
2019
Princeton University
2016
Consejo Superior de Investigaciones Científicas
2011-2014
Universitat de les Illes Balears
2011
Climate change challenges organisms to adapt or move track changes in environments space and time. We used two measures of thermal shifts from analyses global temperatures over the past 50 years describe pace climate that species should track: velocity (geographic isotherms time) shift seasonal timing temperatures. Both are higher ocean than on land at some latitudes, despite slower warming. These indices give a complex mosaic predicted range phenology deviate simple poleward migration...
Abstract. Freshwater discharge from glaciers is increasing across the Arctic in response to anthropogenic climate change, which raises questions about potential downstream effects marine environment. Whilst a combination of long-term monitoring programmes and intensive field campaigns have improved our knowledge glacier–ocean interactions recent years, especially with respect fjord/ocean circulation, there are extensive gaps concerning how affect biogeochemistry productivity. Following two...
Arctic Ocean primary productivity is limited by light and inorganic nutrients. With sea ice cover declining in recent decades, nitrate limitation has been speculated to become more prominent. Although much learned about supply from general patterns of ocean circulation water column stability, a quantitative analysis requires dedicated turbulence measurements that have only started accumulate the last dozen years. Here we present new observations turbulent vertical flux Laptev Sea, Baffin...
Abstract. Primary production on the coast and in Greenland fjords sustains important local sustenance fisheries. However, unprecedented melting of Ice Sheet (GrIS) is impacting coastal ocean, its effects fjord ecology remain understudied. It has been suggested that as glaciers retreat, primary regimes may be altered, rendering less productive. Here we investigate patterns productivity a northeast (Young Sound, 74∘ N), which receives run-off from GrIS via land-terminating glaciers. We...
The Arctic marine system is large and heterogeneous, harsh remote, now changing very rapidly, all of which contribute to our current inadequate understanding its basic structures functions. In particular, many key processes within external the Ocean are intrinsically linked freshwater system, itself undergoing rapid uncertain change. role (delivery, disposition, storage, export) in has recently received significant attention; however, due fact that few studies able cover regions seasons...
Abstract. Measurements of dissolved organic carbon (DOC), nitrogen (DON), and phosphorus (DOP) concentrations are used to characterize the matter (DOM) pool important components biogeochemical cycling in coastal ocean. Here, we present first edition a global database (CoastDOM v1; available at https://doi.org/10.1594/PANGAEA.964012, Lønborg et al., 2023) compiling previously published unpublished measurements DOC, DON, DOP waters. These data complemented by hydrographic such as temperature...
A Marine Climate Impacts Workshop was held from 29 April to 3 May 2012 at the US National Center of Ecological Analysis and Synthesis in Santa Barbara. This workshop culmination a series six meetings over past three years, which had brought together 25 experts climate change ecology, analysis large datasets, palaeontology, marine ecology physical oceanography. Aims these workshops were produce global synthesis impacts on biota, identify sensitive habitats taxa, inform current...
Greenland's fjords and coastal waters are highly productive sustain important fisheries. However, retreating glaciers increasing meltwater changing fjord circulation biogeochemistry, which may threaten future productivity. The freshening of Greenland caused by unprecedented melting the Ice Sheet alter carbonate chemistry in waters, influencing CO2 uptake causing biological consequences from acidification. few studies to date explore current acidification state waters. Here we present...
Larval stages are among those most vulnerable to ocean acidification (OA). Projected atmospheric CO2 levels for the end of this century may lead negative impacts on communities dominated by calcifying taxa with planktonic life stages. We exposed Mediterranean mussel (Mytilus galloprovincialis) sperm and early pHT 8.0 (current pH) 7.6 (2100 level) manipulating pCO2 level (380 1000 ppm). Sperm activity was examined at ambient temperatures (16–17 °C) using individual males as replicates. also...
Abstract Aim To assess confidence in conclusions about climate‐driven biological change through time, and identify approaches for strengthening scientific ecological impacts of climate change. Location Global. Methods We outlined a framework inferences drawn from impact studies the systematic integration prior expectations, long‐term data quantitative statistical procedures. then developed numerical index ( C ) used it to evaluate current practices 208 marine comprising 1735 time series....
An experiment was performed in order to analyze the effects of increase water temperature and CO2 partial pressure expected for end this century a present phytoplankton community inhabiting Arctic Ocean. We analyzed both factors acting independently together, test possible interactions between them. The arctic planktonic incubated under 6 different treatments combining three experimental temperatures (1 ºC, ºC 10 ºC) with two levels 380 ppm or 1000 ppm, at UNIS installations Longyearbyen...
Abstract. Climate warming is especially severe in the Arctic, where average temperature increasing 0.4 °C per decade, two to three times higher than global rate. Furthermore, Arctic has lost more half of its summer ice extent since 1980 and predictions suggest that will be free as early 2050, which could increase rate warming. Predictions based on metabolic theory ecology assume enhance rates thus both primary production respiration increase. However, these do not consider specific balance...
Ocean acidification and warming are two main consequences of climate change that can directly affect biological ecosystem processes in marine habitats. The Arctic is the region world experiencing at steepest rate compared with other latitudes. Since planktonic microorganisms play a key role biogeochemical cycles ocean it crucial to simultaneously evaluate effect increasing CO2 on microbial communities. Here, from water samples high-Arctic fjord (Svalbard), using an experimental microcosms...
Abstract. The metabolism of the Arctic Ocean is marked by extremely pronounced seasonality and spatial heterogeneity associated with light conditions, ice cover, water masses nutrient availability. Here we report marine planktonic metabolic rates (net community production, gross primary production respiration) along three different seasons year, for a total eight cruises western sector European (Fram Strait – Svalbard region) in margin: one at end 2006 (fall/winter), two 2007 (early spring...
Abstract Rising temperatures in the Arctic Ocean are causing sea ice and glaciers to melt at record breaking rates, which has consequences for carbon cycling that yet be fully understood. Microbial is driven by internal processing of situ produced organic (OC), however recent research suggests water from could introduce an allochthonous source OC microbial food web with ramifications metabolic balance plankton communities. In this study, we characterized autochthonous sources Western...
Abstract. The measurements of dissolved organic carbon (DOC), nitrogen (DON), and phosphorus (DOP) are used to characterize the matter (DOM) pool important components biogeochemical cycling in coastal ocean. Here, we present first edition a global database (CoastDOM v1; available at https://figshare.com/s/512289eb43c4f8e8eaef) compiling previously published unpublished DOC, DON, DOP collected waters. These data complemented by hydrographic such as temperature salinity and, extent possible,...
The Arctic Ocean is predicted to freshen by 30-50% 2100, with coastal areas receiving significant freshwater from melting glaciers and permafrost. This influx of freshwater, along increased sediment carbon inputs, altering the water chemistry Greenland’s coasts, potentially impacting food webs. In this study, we examine how sediment-rich, glacial meltwater affects microbial web in a high fjord. We differentiate effects freshening alone (using Milli-Q water) those combined...
The rapidly melting Arctic glaciers deliver substantial amounts of allochthonous material to the coastal ocean, altering environment in which biogeochemical processes are taking place. Perturbed aquatic carbon cycling is a particularly troubling outcome intensified glacial runoff, with increasing heterotrophy and outgassing CO2 among chief concerns. As key factors influencing activity heterotrophic microbes, quantity quality organic warrant closer examination. To address relevant aspects, we...
Arctic fjord ecosystems are undergoing rapid changes due to climate warming, glacier retreat, and shifts in oceanography, with significant implications for biogeochemical cycling biological productivity. As glaciers retreat discharge increases, fjords becoming fresher, morphology is changing, altering circulation, vertical structure, the light environment. Traditionally, marine-terminating have been considered more productive nutrient renewal from subglacial plumes. However, this...
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 temporal differences concentrations stocks across the ocean, how these relate temperature salinity. We estimated a median stock 3.15 Pg C (interquartile range (IQR) = 0.85 C), with being 2.2 times higher than open ocean surface waters. Globally seasonally, salinity was main driver correlated negatively...