Shipboard Lidar as a Tool for Remotely Measuring the Distribution and Bulk Characteristics of Marine Particles
Light detection and ranging (lidar) can provide remote estimates of the vertical distribution of optical properties in the ocean, potentially revolutionizing our ability to characterize the spatial structure of upper ocean ecosystems. However, challenges associated with quantifying the relationship...
Main Author: | |
---|---|
Format: | Text |
Language: | unknown |
Published: |
ODU Digital Commons
2021
|
Subjects: | |
Online Access: | https://digitalcommons.odu.edu/oeas_etds/183 https://digitalcommons.odu.edu/cgi/viewcontent.cgi?article=1183&context=oeas_etds |
id |
ftolddominionuni:oai:digitalcommons.odu.edu:oeas_etds-1183 |
---|---|
record_format |
openpolar |
spelling |
ftolddominionuni:oai:digitalcommons.odu.edu:oeas_etds-1183 2023-05-15T17:36:17+02:00 Shipboard Lidar as a Tool for Remotely Measuring the Distribution and Bulk Characteristics of Marine Particles Collister, Brian Leigh 2021-12-01T08:00:00Z application/pdf https://digitalcommons.odu.edu/oeas_etds/183 https://digitalcommons.odu.edu/cgi/viewcontent.cgi?article=1183&context=oeas_etds unknown ODU Digital Commons https://digitalcommons.odu.edu/oeas_etds/183 https://digitalcommons.odu.edu/cgi/viewcontent.cgi?article=1183&context=oeas_etds In Copyright. URI: http://rightsstatements.org/vocab/InC/1.0/ This Item is protected by copyright and/or related rights. You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. For other uses you need to obtain permission from the rights-holder(s). OES Theses and Dissertations Depolarization Lidar Ocean particles Remote sensing Geographic Information Sciences Oceanography Physics text 2021 ftolddominionuni 2023-01-16T18:44:52Z Light detection and ranging (lidar) can provide remote estimates of the vertical distribution of optical properties in the ocean, potentially revolutionizing our ability to characterize the spatial structure of upper ocean ecosystems. However, challenges associated with quantifying the relationship between lidar measurements and biogeochemical properties of interest have prevented its adoption for routinely mapping the vertical structure of marine ecosystems. To address this, we developed a shipboard oceanographic lidar that measures attenuation (α) and linear depolarization (δ) at scales identical to those of in-water optical and biogeochemical measurements. The instrument’s ability to resolve the distribution of optical and biogeochemical properties was characterized during a series of field campaigns in the Mid-Atlantic Bight (MAB) and Gulf of Maine (GoM). α resolved vertical and horizontal gradients in absorption and chlorophyll concentration associated with the Chesapeake Bay outflow and distinct water masses in the GoM. δ was related to the particulate backscattering ratio, an optical proxy for particle size and composition, suggesting that δ could provide information on the material properties of marine particles. After initial characterizations, we conducted a 13-day deployment in the GoM and western North Atlantic to sample a mesoscale coccolithophore bloom. Bloom features were mapped at sub-kilometer scales and δ was used to distinguish coccoliths/coccolithophores from non-calcified particles. Finally, a model parameterized with in-water optical measurements from the bloom and laboratory linear depolarization measurements was used to explore the influence of multiple scattering and particle characteristics on measurements of δ. Single scattering measurements of δ exhibited a complex dependency on particle shape, size, and composition that was consistent with scattering calculations for non-spherical particles. Model results suggested that variability in δ was driven predominantly by shifts in particle ... Text North Atlantic Old Dominion University: ODU Digital Commons |
institution |
Open Polar |
collection |
Old Dominion University: ODU Digital Commons |
op_collection_id |
ftolddominionuni |
language |
unknown |
topic |
Depolarization Lidar Ocean particles Remote sensing Geographic Information Sciences Oceanography Physics |
spellingShingle |
Depolarization Lidar Ocean particles Remote sensing Geographic Information Sciences Oceanography Physics Collister, Brian Leigh Shipboard Lidar as a Tool for Remotely Measuring the Distribution and Bulk Characteristics of Marine Particles |
topic_facet |
Depolarization Lidar Ocean particles Remote sensing Geographic Information Sciences Oceanography Physics |
description |
Light detection and ranging (lidar) can provide remote estimates of the vertical distribution of optical properties in the ocean, potentially revolutionizing our ability to characterize the spatial structure of upper ocean ecosystems. However, challenges associated with quantifying the relationship between lidar measurements and biogeochemical properties of interest have prevented its adoption for routinely mapping the vertical structure of marine ecosystems. To address this, we developed a shipboard oceanographic lidar that measures attenuation (α) and linear depolarization (δ) at scales identical to those of in-water optical and biogeochemical measurements. The instrument’s ability to resolve the distribution of optical and biogeochemical properties was characterized during a series of field campaigns in the Mid-Atlantic Bight (MAB) and Gulf of Maine (GoM). α resolved vertical and horizontal gradients in absorption and chlorophyll concentration associated with the Chesapeake Bay outflow and distinct water masses in the GoM. δ was related to the particulate backscattering ratio, an optical proxy for particle size and composition, suggesting that δ could provide information on the material properties of marine particles. After initial characterizations, we conducted a 13-day deployment in the GoM and western North Atlantic to sample a mesoscale coccolithophore bloom. Bloom features were mapped at sub-kilometer scales and δ was used to distinguish coccoliths/coccolithophores from non-calcified particles. Finally, a model parameterized with in-water optical measurements from the bloom and laboratory linear depolarization measurements was used to explore the influence of multiple scattering and particle characteristics on measurements of δ. Single scattering measurements of δ exhibited a complex dependency on particle shape, size, and composition that was consistent with scattering calculations for non-spherical particles. Model results suggested that variability in δ was driven predominantly by shifts in particle ... |
format |
Text |
author |
Collister, Brian Leigh |
author_facet |
Collister, Brian Leigh |
author_sort |
Collister, Brian Leigh |
title |
Shipboard Lidar as a Tool for Remotely Measuring the Distribution and Bulk Characteristics of Marine Particles |
title_short |
Shipboard Lidar as a Tool for Remotely Measuring the Distribution and Bulk Characteristics of Marine Particles |
title_full |
Shipboard Lidar as a Tool for Remotely Measuring the Distribution and Bulk Characteristics of Marine Particles |
title_fullStr |
Shipboard Lidar as a Tool for Remotely Measuring the Distribution and Bulk Characteristics of Marine Particles |
title_full_unstemmed |
Shipboard Lidar as a Tool for Remotely Measuring the Distribution and Bulk Characteristics of Marine Particles |
title_sort |
shipboard lidar as a tool for remotely measuring the distribution and bulk characteristics of marine particles |
publisher |
ODU Digital Commons |
publishDate |
2021 |
url |
https://digitalcommons.odu.edu/oeas_etds/183 https://digitalcommons.odu.edu/cgi/viewcontent.cgi?article=1183&context=oeas_etds |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
OES Theses and Dissertations |
op_relation |
https://digitalcommons.odu.edu/oeas_etds/183 https://digitalcommons.odu.edu/cgi/viewcontent.cgi?article=1183&context=oeas_etds |
op_rights |
In Copyright. URI: http://rightsstatements.org/vocab/InC/1.0/ This Item is protected by copyright and/or related rights. You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. For other uses you need to obtain permission from the rights-holder(s). |
_version_ |
1766135728428810240 |