In-situ particle size distribution, volume concentration, and other measurements collected from profiled LISST-200X sensor throughout the Bedford Basin during the Halifax Joint Learning Opportunity from 2024-09-25 to 2025-03-11 (NCEI Accession 0304370)

Published by NOAA National Centers for Environmental Information | National Oceanic and Atmospheric Administration, Department of Commerce | Metadata Last Checked: January 29, 2026 | Last Modified: 2025-05-19T00:00:00.000+00:00

This dataset contains time-series profiled measurements from a LISST-200X sensor (Sequoia Scientific, Inc.) collected during an ocean alkalinity enhancement (OAE) field trial conducted by Planetary Technologies in collaboration with Dalhousie University in Halifax, Nova Scotia, Canada. This dataset was collected under a Joint Learning Opportunity (JLO) funded by Carbon to Sea and COVE. The sensor was deployed to provide direct, in-situ measurements of particles and particle properties (e.g., size, concentration) to (1) address open questions related to alkaline feedstock transport and fate, as well as environmental impacts from alkalinity dosing (e.g., secondary precipitation), and (2) support the refinement and validation of models used to predict alkaline feedstock transport and dissolution kinetics. The LISST-200X was profiled at different locations and times throughout the Bedford Basin and surrounding waters from September 2024 to March 2025, both in and out of the mixing zone where alkalinity was being dosed. Profiling was performed during the approximately biweekly boat surveys conducted throughout the trial. The sensor measured particle size distribution, mean particle diameter, volume concentration, beam attenuation, and other variables. Additional information about the sensor deployment, profile locations, measurement parameters, data format, and processing can be found in the included supplemental document.

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description	This dataset contains time-series profiled measurements from a LISST-200X sensor (Sequoia Scientific, Inc.) collected during an ocean alkalinity enhancement (OAE) field trial conducted by Planetary Technologies in collaboration with Dalhousie University in Halifax, Nova Scotia, Canada. This dataset was collected under a Joint Learning Opportunity (JLO) funded by Carbon to Sea and COVE. The sensor was deployed to provide direct, in-situ measurements of particles and particle properties (e.g., size, concentration) to (1) address open questions related to alkaline feedstock transport and fate, as well as environmental impacts from alkalinity dosing (e.g., secondary precipitation), and (2) support the refinement and validation of models used to predict alkaline feedstock transport and dissolution kinetics. The LISST-200X was profiled at different locations and times throughout the Bedford Basin and surrounding waters from September 2024 to March 2025, both in and out of the mixing zone where alkalinity was being dosed. Profiling was performed during the approximately biweekly boat surveys conducted throughout the trial. The sensor measured particle size distribution, mean particle diameter, volume concentration, beam attenuation, and other variables. Additional information about the sensor deployment, profile locations, measurement parameters, data format, and processing can be found in the included supplemental document.
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identifier	gov.noaa.nodc:0304370
issued	2025-05-16T00:00:00.000+00:00
keyword	[ "0304370", "BEAM ATTENUATION COEFFICIENT", "DEPTH - OBSERVATION", "WATER TEMPERATURE", "bottle", "temperature probe", "optical", "physical", "time series", "Dalhousie University", "Sequoia Scientific, Inc.", "Sequoia Scientific, Inc.", "Ocean Carbon and Acidification Data System (OCADS)", "East Coast - US/Canada", "North Atlantic Ocean", "oceanography", "Ocean Carbon and Acidification Data System (OCADS) Project", "Carbon to Sea and COVE's 2024 Ocean Alkalinity Enhancement (OAE) Joint Learning Opportunity (JLO)", "EARTH SCIENCE > OCEANS > OCEAN OPTICS > ATTENUATION/TRANSMISSION", "EARTH SCIENCE > OCEANS > OCEAN TEMPERATURE > WATER TEMPERATURE", "Time series", "Beamc", "Depth", "Meandiam", "PSD", "Temperature", "Totconc", "Transmission", "TEMPERATURE PROBES > TEMPERATURE PROBES", "OCEAN > ATLANTIC OCEAN > NORTH ATLANTIC OCEAN", "Bedford Basin", "Halifax Harbor", "Tufts Cove" ]
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rights	otherRestrictions
spatial	-63.545167,44.615267,-63.6682,44.720183
temporal	2024-09-25T00:00:00+00:00/2025-03-11T00:00:00+00:00
title	In-situ particle size distribution, volume concentration, and other measurements collected from profiled LISST-200X sensor throughout the Bedford Basin during the Halifax Joint Learning Opportunity from 2024-09-25 to 2025-03-11 (NCEI Accession 0304370)