Stacy Deppeler
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View article: Fluxes of Biogenic and Oxygenated VOCs From In Situ Mesocosm Studies of Seawaters From the South‐West Pacific Ocean
Fluxes of Biogenic and Oxygenated VOCs From In Situ Mesocosm Studies of Seawaters From the South‐West Pacific Ocean Open
Volatile organic compounds (VOCs) are key atmospheric species influencing oxidative capacity and secondary organic aerosol formation. Oceans emit a variety of VOCs via complex biological, chemical, and physical processes. Although dimethyl…
Eco-physiological response of <i>Phaeocystis antarctica</i> and <i>Fragilariopsis</i> sp. to increases in irradiance and temperature Open
Phaeocystis antarctica and Fragilariopsis are key phytoplankton taxa in the Southern Ocean that have different bloom magnitude and phenology, reflecting their differing physiological traits. Here, we investigate the physiological response …
View article: Relating Dimethyl Sulphide and Methanethiol Fluxes to Surface Biota in the South‐West Pacific Using Shipboard Air‐Sea Interface Tanks
Relating Dimethyl Sulphide and Methanethiol Fluxes to Surface Biota in the South‐West Pacific Using Shipboard Air‐Sea Interface Tanks Open
Dimethyl sulphide (DMS) and methanethiol (MeSH) emissions from South Pacific surface seawater were determined in deck board Air‐Sea Interface Tanks during the Sea2Cloud voyage in March 2020. The measured fluxes from water to headspace (F) …
Pronounced Diel Cycling of Dissolved Carbohydrates and Amino Acids in the Surface Ocean and across Diverse Regimes Open
The metabolism of phytoplankton cells is synchronized with the diel light cycle. Likewise, associated heterotrophic bacteria adjust their diel expression of transporter- and catabolism-related genes to target the dissolved organic matter r…
Evidence of nitrate-based nighttime atmospheric nucleation driven by marine microorganisms in the South Pacific Open
Our understanding of ocean–cloud interactions and their effect on climate lacks insight into a key pathway: do biogenic marine emissions form new particles in the open ocean atmosphere? Using measurements collected in ship-borne air–sea in…
Quantified effect of seawater biogeochemistry on the temperature dependence of sea spray aerosol fluxes Open
Future change in sea surface temperature may influence climate via various air–sea feedbacks and pathways. In this study, we investigate the influence of surface seawater biogeochemical composition on the temperature dependence of number-b…
Microplastic pollution distribution: Differences between marine reserves and urbanised areas Open
Microplastic particles (<5 mm) have been observed to be widely distributed in the oceans, from estuaries the deep ocean trenches. While plastic pollution in the marine environment is a growing concern worldwide, relatively little is known …
View article: Air-Sea fluxes of dimethyl sulphide and methanethiol in the South-West Pacific
Air-Sea fluxes of dimethyl sulphide and methanethiol in the South-West Pacific Open
Air-sea fluxes of dimethyl sulphide (DMS) and methanethiol (MeSH) from surface seawater in the remote Southern Pacific Ocean were measured in three Air-Sea Interface Tank (ASIT) experiments during the Sea2Cloud voyage in March 2020. The me…
Comment on acp-2022-790 Open
Abstract. Future change in sea surface temperature may influence climate via various air-sea feedbacks and pathways. In this study, we investigate the influence of surface seawater biogeochemical composition on the temperature dependence o…
Nighttime atmospheric nucleation driven by marine microorganisms Open
Understanding ocean-cloud interactions and their effect on climate requires that atmospheric new particle formation is characterized. Yet, the process of particle formation from marine biogenic gaz-phase emissions has not been evidenced in…
View article: Sea2Cloud: From Biogenic Emission Fluxes to Cloud Properties in the Southwest Pacific
Sea2Cloud: From Biogenic Emission Fluxes to Cloud Properties in the Southwest Pacific Open
The goal of the Sea2Cloud project is to study the interplay between surface ocean biogeochemical and physical properties, fluxes to the atmosphere, and ultimately their impact on cloud formation under minimal direct anthropogenic influence…
View article: Antarctic subglacial flux: a driver of climate sensitivity on coastal margins
Antarctic subglacial flux: a driver of climate sensitivity on coastal margins Open
Climate warming is increasing glacial melt on the Antarctic continent, in turn shifting hydrostatic pressure on subglacial and surface lakes. This has a direct impact on the rates ofgroundwater discharge, with feedbacks to local and region…
Quantified effect of seawater biogeochemistry on the temperature dependence of sea spray aerosol fluxes Open
Future change in sea surface temperature may influence climate via various air-sea feedbacks and pathways. In this study, we investigate the influence of surface seawater biogeochemical composition on the temperature dependence of sea spra…
Dimethyl sulfide cycling in the sea surface microlayer in the southwestern Pacific – Part 1: Enrichment potential determined using a novel sampler Open
Elevated dimethyl sulfide (DMS) concentrations in the sea surface microlayer (SML) have been previously related to DMS air–sea flux anomalies in the southwestern Pacific. To further address this, DMS, its precursor dimethylsulfoniopropiona…
Dimethyl sulfide cycling in the sea surface microlayer in the southwestern Pacific – Part 2: Processes and rates Open
As the sea surface microlayer (SML) is the uppermost oceanic layer and differs in biogeochemical composition to the underlying subsurface water (SSW), it is important to determine whether processes in the SML modulate gas exchange, particu…
Comment on egusphere-2022-504 Open
As the sea surface microlayer (SML) is the uppermost oceanic layer and differs in biogeochemical composition to the underlying subsurface water (SSW), it is important to determine whether processes in the SML modulate gas exchange, particu…
Phytoplankton Responses to Bacterially Regenerated Iron in a Southern Ocean Eddy Open
In the Subantarctic sector of the Southern Ocean, vertical entrainment of iron (Fe) triggers the seasonal productivity cycle but diminishing physical supply during the spring to summer transition forces microbial assemblages to rapidly acc…
DMS cycling in the Sea Surface Microlayer in the South West Pacific: 1. Enrichment potential determined using a novel sampler Open
Elevated dimethyl sulfide (DMS) concentrations in the sea surface microlayer (SML) have been previously related to DMS air-sea flux anomalies in the South West Pacific. To further address this, DMS, its precursor dimethylsulfoniopropionate…
DMS cycling in the Sea Surface Microlayer in the South West Pacific: 2. Processes and Rates Open
As the sea surface microlayer (SML) is the uppermost oceanic layer and differs in biogeochemical composition to the underlying subsurface water (SSW), it is important to determine whether processes in the SML modulate gas exchange, particu…
Evidence for the Impact of Climate Change on Primary Producers in the Southern Ocean Open
Within the framework of the Marine Ecosystem Assessment for the Southern Ocean (MEASO), this paper brings together analyses of recent trends in phytoplankton biomass, primary production and irradiance at the base of the mixed layer in the …
Ocean acidification reduces growth and grazing impact of Antarctic heterotrophic nanoflagellates Open
High-latitude oceans have been identified as particularly vulnerable to ocean acidification if anthropogenic CO2 emissions continue. Marine microbes are an essential part of the marine food web and are a critical link in biogeochemical pro…
Author response to Reviewer 2 Open
Heterotrophic nanoflagellates play and important role in pelagic marine ecosystems as grazers of picoplankton and as prey for microheterotrophs (ciliates and heterotrophic dinoflagellates).Polar marine ecosytems are especially vulnerable t…
Author response to Reviewer 1 Open
This work is part of a minicosm investigation of the effects of increasing fCO2 levels on a natural planktonic microbial community of Prydz Bay, East Antarctica, and deals with the response of heterotrophic flagellates (HNF), nano-and pico…
Microbial Competition in the Subpolar Southern Ocean: An Fe–C Co-limitation Experiment Open
Iron (Fe) is a paradox in the modern ocean – it is central to many life-critical enzymes but is scarce across most surface waters. The high cellular demand and low bioavailability of Fe likely puts selective pressure on marine microorganis…