A5018606646- Marine and coastal ecosystems
- Arctic and Antarctic ice dynamics
- Ocean Acidification Effects and Responses
- Oceanographic and Atmospheric Processes
- Marine Biology and Ecology Research
- Polar Research and Ecology
- Climate change and permafrost
- Environmental Monitoring and Data Management
- Atmospheric and Environmental Gas Dynamics
- Microbial Community Ecology and Physiology
- Offshore Engineering and Technologies
- Cryospheric studies and observations
- Advanced Computational Techniques and Applications
- Physiological and biochemical adaptations
- Aquatic Ecosystems and Phytoplankton Dynamics
- Peatlands and Wetlands Ecology
- Protist diversity and phylogeny
- Methane Hydrates and Related Phenomena
- Oil Spill Detection and Mitigation
- Ecology and biodiversity studies
- Fish Ecology and Management Studies
- Climate variability and models
- Water Quality Monitoring Technologies
- Smart Materials for Construction
- Geology and Paleoclimatology Research
Oberlin College
2020-2025
Duke University
2014-2022
University of Virginia
2018
University of New Hampshire
2014
The west Antarctic Peninsula (WAP) is a region of rapid environmental changes, with regional differences in climate warming along the north–south axis peninsula. Along WAP, Palmer corresponds to warmer lesser sea ice extent north compared Rothera ~ 400 km south. Comprehensive and comparative, year-round assessments WAP microbial community dynamics coastal surface waters at these two locations are imperative understand effects variations on dynamics, but this still lacking. We report seasonal...
New production (New P, the rate of net primary (NPP) supported by exogenously supplied limiting nutrients) and community (NCP, gross not consumed respiration) are closely related but mechanistically distinct processes. They set carbon balance in upper ocean define an limit for export from system. The relationships, relative magnitudes variability P (from 15NO3- uptake), O2 : argon-based NCP sinking particle (based on 238U 234Th disequilibrium) increasingly well documented still clearly...
Phytoplankton division rate (µ), loss (l), and specific accumulation (r) were calculated using Chlorophyll-a (Chl) phytoplankton carbon (Cphyto) derived from bio-optical measurements on 12 Argo profiling floats in a north-south section of the western North Atlantic Ocean (40° N to 60° N). The float results used quantify seasonal phenology bloom dynamics for region. Latitudinally varying observed. In north, CPhyto peak was higher, occurred later, accompanied by higher total annual...
Employing continuous in situ measurements of dissolved O2/Ar and O2 the Arctic Ocean, we investigate mechanisms controlling physical (abiotic) biological oxygen saturation state variability surface ocean beneath sea ice. were made underway using Equilibrator Inlet Mass Spectrometry (EIMS) during an icebreaker survey transiting upper Ocean across North Pole late summer 2011. Using concurrently collected total oxygen, devolve (Ar) signals at unprecedented horizontal resolution ocean. In Nansen...
High-resolution ocean biophysical models are now routinely being conducted at basin and global-scale, opening opportunities to deepen our understanding of the mechanistic coupling physical biological processes mesoscale. Prior using these test scientific questions, we need assess their skill. While progress has been made in validating mean field, little work done evaluate skill simulated mesoscale variability. Here use geostatistical 2-D variograms quantify magnitude spatial scale...
Abstract The Western Antarctic Peninsula (WAP) has been experiencing rapid regional warming since at least the 1950s, however, impacts of this local scale are variable and nuanced. Previous studies that have linked sea‐ice variability to biogeochemical cycles food web dynamics often combine local‐scale data with coarse‐resolution satellite data, which may not adequately capture conditions. In study, we analyzed in situ observations collected as part a 28‐year record (1992–2020) from Palmer...
Abstract Lake Erie's Western Basin is a eutrophic region and likely hotspot for carbon transformation. While this basin has received much attention its high nutrient loads from the Maumee River recurring harmful algal blooms, gone understudied. To investigate seasonal spatial variability in inorganic organic budgets, we completed three surveys spring, summer, fall on transect to South Bass Island. In each survey, observed higher of all species within 11 km mouth relative sites outside Bay....
The field of oceanography is transitioning from data-poor to data-rich, thanks in part increased deployment in-situ platforms and sensors, such as those that instrument the US-funded Ocean Observatories Initiative (OOI). However, generating science-ready data products these particularly making biogeochemical measurements, often requires extensive end-user calibration validation procedures, which can present a significant barrier. Openly available community-developed -vetted Best Practices...
Abstract Interest in winter limnology is growing rapidly, but progress hindered by a shortage of standardized multivariate datasets on conditions. Addressing the data gap will enhance our understanding ecosystem function and lake response to environmental change. Here, we describe dataset generated multi‐institutional sampling campaign across all five Laurentian Great Lakes some their connecting waters (the Winter Grab). The objective Grab was characterize mid‐winter limnological conditions...
Abstract In this study, we compare mechanistic and empirical approaches to reconstruct the air‐sea flux of biological oxygen ( ) by parameterizing physical saturation anomaly (ΔO 2[phy] in order separate contribution from total oxygen. The first approach matches ΔO monthly climatology argon a global ocean circulation model's output. second derives an iterative mass balance model forced satellite‐based drivers prior sampling day assuming that interactions are dominant factors driving surface...