A5038805772- Marine and coastal ecosystems
- Ocean Acidification Effects and Responses
- Analytical Chemistry and Sensors
- Marine Biology and Ecology Research
- Coral and Marine Ecosystems Studies
- Lower Extremity Biomechanics and Pathologies
- Smart Materials for Construction
- Water Quality Monitoring Technologies
- Foot and Ankle Surgery
- Environmental Monitoring and Data Management
- Underwater Vehicles and Communication Systems
- Radioactivity and Radon Measurements
- Neurogenetic and Muscular Disorders Research
- Water Quality Monitoring and Analysis
- Tropical and Extratropical Cyclones Research
- Tendon Structure and Treatment
- Marine Bivalve and Aquaculture Studies
- Environmental Chemistry and Analysis
- Arctic and Antarctic ice dynamics
- Oceanographic and Atmospheric Processes
- Child and Adolescent Health
- Maritime Navigation and Safety
- Geochemistry and Geologic Mapping
- Adolescent and Pediatric Healthcare
- Marine and fisheries research
University of North Carolina Wilmington
2021-2024
Scripps Institution of Oceanography
2011-2023
University of California, San Diego
2011-2023
Podiatry Institute
2000-2023
American College of Foot and Ankle Surgeons
2020
Temple University
2000
Performance of autonomous pH sensors is evaluated by comparing in situ data to independent bench-top measurements and co-located pH, O 2 , p CO sensors. While the best practice always deploy a properly calibrated sensor, lengthy time period required for sensor conditioning calibration often results deployment without comprehensive calibration. Quality control (QC) procedures are examined determine errors associated with different approaches lay framework practices. Sensor packages employing...
Accurate observations of the Earth system are required to understand how our planet is changing and help manage its resources. The aquatic environment−including lakes, rivers, wetlands, estuaries, coastal open oceans−is a fundamental component controlling key physical, biological, chemical processes that allow life flourish. Yet, this environment critically undersampled in both time space. New cost-effective sampling solutions urgently needed. Here, we highlight potential improve by tapping...
We use autonomous nitrate (NO3−), oxygen (O2), and dissolved inorganic carbon (DIC) observations to examine the relationship between ratios of C:N:O at an upwelling site in Southern California Current System. Mean 95% confidence intervals observed by sensors over 8 months were NO3−:O2 = −0.11 ± 0.002, NO3−:DIC 0.14 0.001, DIC:O2 −0.83 0.01, good agreement with Redfield ratios. Variability on weekly time scale is attributable shifts biological demand nutrient availability shown exhibit a...
Abstract Ion‐sensitive field effect transistor‐based pH sensors have been shown to perform well in high frequency and long‐term ocean sampling regimes. The Honeywell Durafet is widely used due its stability, fast response, characterization over a large range of oceanic conditions. However, potentiometric monitoring inherently complicated by the fact that require careful calibration. Offsets calibration coefficients observed when comparing laboratory field‐based calibrations prior work has...
Ocean acidification, the decrease in seawater pH as a result of increasing carbon dioxide, has been shown to be an important driver oyster mortality West Coast shellfisheries [1]. Yet chemistry is only sparsely measured, especially relative its high variability coastal ecosystems, due complexity and cost appropriate sensors their maintenance. Worse, data are rarely communicated real time water quality or aquacultural managers. In Agua Hedionda Lagoon (AHL) Carlsbad, CA, researchers from...
Coastal populations and hazards are escalating simultaneously, leading to an increased importance of coastal ocean observations. Many well-established observational techniques expensive, require complex technical training, offer little no public engagement. Smartfin, oceanographic sensor–equipped surfboard fin citizen science program, was designed alleviate these issues. Smartfins typically used by surfers paddlers in surf zone nearshore regions where they can help fill gaps between other...
In April and May of 2020, a large phytoplankton bloom composed primarily the dinoflagellate Lingulodinium polyedra reached historic levels in geographic expanse, duration, density along coast southern California, United States, Baja California Norte, Mexico. Here, we report water quality parameters dissolved oxygen pH over course red tide, as measured by multiple sensors deployed various locations San Diego County, document extent mass organism mortality using field surveys community science...
Research assessing the biological impacts of global ocean change often requires a burdensome characterization seawater carbonate chemistry. For laboratory-based acidification research, this impedes scope experimental design. Honeywell Durafet® III pH electrodes provide precise and continuous measurements. In addition to use in oceanographic sensor packages, Durafets can also be used laboratory track control treatments via Universal Dual Analyzers (UDA). Here we performance data,...
As ocean acidification (OA) sensor technology develops and improves, in situ deployment of such sensors is becoming more widespread. However, the scientific value these data depends on development application best practices for calibration, validation, quality assurance as well further optimization measurement technologies themselves. Here, we summarize results a two-day workshop OA held February 2018, Victoria, British Columbia, Canada, drawing collective experience perspectives...
Nearshore coastal waters are highly dynamic in both space and time. They can be difficult to sample using conventional methods due their shallow depth, tidal variability, the presence of strong currents breaking waves. High resolution satellite sensors used provide synoptic views Surface Temperature (ST), but performance such ST products nearshore zone is poorly understood. Close shoreline, pixels influenced by mixed composition water land, as a result sensor's spatial resolution. This cause...
The tracer monitored titration (TMT) technique is evaluated for measurement of dissolved oxygen. TMT developed in this work uses a simple apparatus consisting low-precision pump titrant delivery and an optical detector based on white LED two photodiodes with interference filters. It shown that the classic Winkler method can be made free routine volumetric gravimetric measurements by application theory, which allows tracking amounts sample using chemical tracer. precision prototype setup was 0.3% RSD.
Abstract Owing to the high cost of commercial optical sensors, there is a need develop low‐cost sensing packages expand monitoring aquatic environments, particularly in under‐resourced regions. Visual methods monitor properties water, like Secchi disk and Forel‐Ule color scale, remain use modern era owing their simplicity, long history use. Yet, recent years have seen advances low‐cost, electronic‐based sensing. Here, designs miniaturized hand‐held device (mini‐Secchi disk) that measures...
Here we describe the data obtained by a successful proof-of-concept initiative to launch first ocean color imager on board CubeSat satellite and collect research-grade imagery at severalfold higher spatial resolution than any other mission. The 3U CubeSat, named SeaHawk, flew nominal altitude of 585 km. Its sensor, HawkEye, collected 7,471 push-broom images 230 × 780 km2 best-in-class 130 m2 per pixel. sensor is built with comparatively low-cost commercial off-the-shelf optoelectronics was...
Variable gas diffusion cell geometries were tested for the extraction of dissolved inorganic carbon (DIC) from a microfluidic (tens to hundreds microliters) seawater sample. With focus on optimization geometry, we compare five unique designs. Using 3-D printing technology streamline prototyping and testing process, able conceive, design, fabricate, thoroughly evaluate each design over course about one month. In total, 1043 DIC measurements carried out in 109 experiments working manifolds. We...
Nearshore coastal waters are among the most dynamic regions on planet and difficult to sample from conventional oceanographic platforms. It has been suggested that environmental sampling of nearshore could be improved by mobilising vast numbers citizens who partake in marine recreational sports, like surfing. In this paper, we compared two approaches for measuring sea surface temperature (SST), an Essential Climate Variable, when One technique involved attaching a commercially-available...
The role of phytoplankton as ocean primary producers and their influence on global biogeochemical cycles makes them arguably the most important living organisms in sea. Like plants land, exhibit seasonal that are controlled by physical, chemical, biological processes. Nearshore coastal waters often contain highest levels biomass. Yet, owing to difficulties sampling this dynamic region, less is known about seasonality nearshore (e.g., surf zone) compared offshore coastal, shelf open waters....
A low-cost (~$100), do-it-yourself (DIY) ultrasonic water level sensor/datalogger has been designed, constructed, and tested for use in education, citizen/community science, research settings. The sensor package comprises an distance sensor, a microcontroller running Arduino firmware, micro-SD card datalogging, real-time clock timekeeping sleep functions, OLED screen display. Electronics are housed custom containers using either upcycled plastic or laser-cut acrylic. Reported accuracy is 5...
The accuracy and precision of satellite sea surface temperature (SST) products in nearshore coastal waters are not well known, owing to a lack in-situ data available for validation. It has been suggested that recreational watersports enthusiasts, who immerse themselves waters, be used as platform improve sampling fill this gap. One tool worldwide by surfers is the Smartfin, which contains sensor integrated into surfboard fin. If tools such Smartfin considered validation work, they must...