An autonomous aerosol sampler/elemental analyzer designed for ocean buoys and remote land sites

Sholkovitz, Edward R.; Allsup, G.; Hosom, David S.; Purcell, Michael

doi:10.1016/s1352-2310(01)00068-1

Cited by 8 publications

(5 citation statements)

References 15 publications

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“…The general arrangement of our multi-sample filtering head is based, primarily, on the WHOI Buoy-Mounted Aerosol Sampler, which collects 24 aerosol samples onto filters arranged in a circle (a filter rosette) (Sholkovitz et al, 2001). In this design, one position is for sample collection, and filters are rotated into place as necessary.…”

Section: Existing Particulate Samplersmentioning

confidence: 99%

A suspended-particle rosette multi-sampler for discrete biogeochemical sampling in low-particle-density waters

Breier

Rauch

McCartney

et al. 2009

Deep Sea Research Part I: Oceanographic Research Papers

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a b s t r a c tTo enable detailed investigations of early stage hydrothermal plume formation and abiotic and biotic plume processes we developed a new oceanographic tool. The Suspended Particulate Rosette sampling system has been designed to collect geochemical and microbial samples from the rising portion of deep-sea hydrothermal plumes. It can be deployed on a remotely operated vehicle for sampling rising plumes, on a wire-deployed water rosette for spatially discrete sampling of non-buoyant hydrothermal plumes, or on a fixed mooring in a hydrothermal vent field for time series sampling. It has performed successfully during both its first mooring deployment at the East Pacific Rise and its first remotely-operated vehicle deployments along the Mid-Atlantic Ridge. It is currently capable of rapidly filtering 24 discrete large-watervolume samples (30-100 L per sample) for suspended particles during a single deployment (e.g. 490 L per sample at 4-7 L per minute through 1 mm pore diameter polycarbonate filters). The Suspended Particulate Rosette sampler has been designed with a long-term goal of seafloor observatory deployments, where it can be used to collect samples in response to tectonic or other events. It is compatible with in situ optical sensors, such as laser Raman or visible reflectance spectroscopy systems, enabling in situ particle analysis immediately after sample collection and before the particles alter or degrade.

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Section: Existing Particulate Samplersmentioning

confidence: 99%

A suspended-particle rosette multi-sampler for discrete biogeochemical sampling in low-particle-density waters

Breier

Rauch

McCartney

et al. 2009

Deep Sea Research Part I: Oceanographic Research Papers

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“…The buoys were first deployed in November 2013 (Buoys M3‐A and M4‐A; Stuut et al., 2013), subsequently re‐deployed in 2014 and 2015 (Buoy M3‐B; Bale, 2014; and Buoys M3‐C and M4‐C; Stuut et al., 2015), and recovered in 2016 (Stuut et al., 2016). The buoys were built at NIOZ, based on the aerosol‐collecting buoys designed by E. Sholkovitz (e.g., Sholkovitz & Sedwick, 2006; Sholkovitz et al., 2001), and are still being developed (Figure 2). The buoys consist of a carrousel with 24 filters which rotate under the air inlet, synchronously with the subsurface sediment traps below the buoys at 8 to 22‐day sample intervals (Table 1).…”

Section: Methodsmentioning

confidence: 99%

Seasonality in Saharan Dust Across the Atlantic Ocean: From Atmospheric Transport to Seafloor Deposition

et al. 2021

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Saharan dust is transported in great quantities from the North African continent every year, most of which is deposited across the North Atlantic Ocean. This dust impacts regional and global climate by affecting the atmospheric radiation balance and altering ocean carbon budgets. However, little research has been carried out on time series of Saharan dust collected in situ across the open Atlantic. Here, we present a unique three‐year time series of Saharan dust along a trans‐Atlantic transect, sampled by moored surface buoys and subsurface sediment traps. Results show a good correlation between the particle‐size distributions of atmospheric dust and the lithogenic particles settling to the deep ocean floor, confirming the aeolian origin of the lithogenic particles intercepted by the subsurface sediment traps, even in the distal western part of the Atlantic Ocean. Dust from both dry and wet deposition as collected by the sediment traps, shows increased deposition fluxes and coarser grain size in summer and/or autumn that coincides with increased precipitation at the sampling sites as derived from satellite data. In contrast, both buoys that sampled dust during transport at sea level show little seasonal variation in both concentration and particle size, as the large amounts of dust transported in summer and early autumn at high altitudes are far above their sampling range. This implies that wet deposition in summer and autumn defines the typical seasonal trends of both the dust deposition flux and its particle‐size distribution observed in the sediment traps.

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“…In fall 2001, the PSI ozone sensor was integrated onto a 3 m dia. discus buoy ( Figure 5), along with aerosol and iron/rainwater sensors (Sholkovitz et al, 2001). A central computer recorded meteorological data (wind speed and direction, temperature, relative humidity, and rain), and sent it to the ozone controller.…”

Section: Tests and Field Deploymentsmentioning

confidence: 99%

New Ozone Measurement Systems for Autonomous Operation on Ocean Buoys and Towers*

Hintsa¹,

Allsup²,

Eck³

et al. 2004

J. Atmos. Oceanic Technol.

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We have built and tested two autonomous ozone measurement systems for use on ocean buoys and towers. They are based on low-power atmospheric ozone sensors from Physical Sciences Inc. (PSI) and 2B Technologies. The PSI sensor operates at 1 Hz with a precision of 1 ppb, but requires about 45 W with the present data system; the 2B makes a measurement every 10 seconds with a precision of 1-2 ppb and uses less than 4 W. The sensors have been packaged in watertight enclosures, with a set of valves and filters to keep out seawater and aerosols. A controller uses data from the sensors and a meteorological system to determine whether sampling should proceed. If a sensor malfunction (such as an incorrect valve position or a temperature beyond its proper range) is detected, the controller attempts to correct it. Both sensors have been tested and used over the ocean, and one complete ozone measurement system (with the PSI sensor) has been successfully deployed on a buoy off Woods Hole. In 2003, this system was operated at the Chesapeake Bay Lighthouse Tower for over a month with excellent results. The2B system was also successfully tested in 2003, at a nearby offshore tower. The design of the systems and their testing and deployments are described, and data from some of the first experiments are presented.

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An autonomous aerosol sampler/elemental analyzer designed for ocean buoys and remote land sites

Cited by 8 publications

References 15 publications

A suspended-particle rosette multi-sampler for discrete biogeochemical sampling in low-particle-density waters

A suspended-particle rosette multi-sampler for discrete biogeochemical sampling in low-particle-density waters

Seasonality in Saharan Dust Across the Atlantic Ocean: From Atmospheric Transport to Seafloor Deposition

New Ozone Measurement Systems for Autonomous Operation on Ocean Buoys and Towers*

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