Shifts in Phytoplankton Community Structure Across an Anticyclonic Eddy Revealed From High Spectral Resolution Lidar Scattering Measurements
Changes in airborne high spectral resolution lidar (HSRL) measurements of scattering, depolarization, and attenuation coincided with a shift in phytoplankton community composition across an anticyclonic eddy in the North Atlantic. We normalized the total depolarization ratio (δ) by the particulate b...
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fttriple:oai:gotriple.eu:10670/1.i3sljy 2023-05-15T17:34:46+02:00 Shifts in Phytoplankton Community Structure Across an Anticyclonic Eddy Revealed From High Spectral Resolution Lidar Scattering Measurements Schulien, Jennifer A. Della Penna, Alice Gaube, Peter Chase, Alison P. Haëntjens, Nils Graff, Jason R. Hair, Johnathan W. Hostetler, Chris A. Scarino, Amy Jo Boss, Emmanuel S. Karp-boss, Lee Behrenfeld, Michael J. 2020-01-01 https://doi.org/10.3389/fmars.2020.00493 https://archimer.ifremer.fr/doc/00641/75313/75809.pdf https://archimer.ifremer.fr/doc/00641/75313/ en eng Frontiers Media SA doi:10.3389/fmars.2020.00493 10670/1.i3sljy https://archimer.ifremer.fr/doc/00641/75313/75809.pdf https://archimer.ifremer.fr/doc/00641/75313/ other Archimer, archive institutionnelle de l'Ifremer Frontiers In Marine Science (2296-7745) (Frontiers Media SA), 2020-06 , Vol. 7 , N. 493 , P. 13p. envir geo Text https://vocabularies.coar-repositories.org/resource_types/c_18cf/ 2020 fttriple https://doi.org/10.3389/fmars.2020.00493 2023-01-22T17:55:33Z Changes in airborne high spectral resolution lidar (HSRL) measurements of scattering, depolarization, and attenuation coincided with a shift in phytoplankton community composition across an anticyclonic eddy in the North Atlantic. We normalized the total depolarization ratio (δ) by the particulate backscattering coefficient (bbp) to account for the covariance in δ and bbp that has been attributed to multiple scattering. A 15% increase in δ/bbp inside the eddy coincided with decreased phytoplankton biomass and a shift to smaller and more elongated phytoplankton cells. Taxonomic changes (reduced dinoflagellate relative abundance inside the eddy) were also observed. The δ signal is thus potentially most sensitive to changes in phytoplankton shape because neither the observed change in the particle size distribution (PSD) nor refractive index (assuming average refractive indices) are consistent with previous theoretical modeling results. We additionally calculated chlorophyll-a (Chl) concentrations from measurements of the diffuse light attenuation coefficient (Kd) and divided by bbp to evaluate another optical metric of phytoplankton community composition (Chl:bbp), which decreased by more than a factor of two inside the eddy. This case study demonstrates that the HSRL is able to detect changes in phytoplankton community composition. High spectral resolution lidar measurements reveal complex structures in both the vertical and horizontal distribution of phytoplankton in the mixed layer providing a valuable new tool to support other remote sensing techniques for studying mixed layer dynamics. Our results identify fronts at the periphery of mesoscale eddies as locations of abrupt changes in near-surface optical properties. Text North Atlantic Unknown Frontiers in Marine Science 7 |
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envir geo Schulien, Jennifer A. Della Penna, Alice Gaube, Peter Chase, Alison P. Haëntjens, Nils Graff, Jason R. Hair, Johnathan W. Hostetler, Chris A. Scarino, Amy Jo Boss, Emmanuel S. Karp-boss, Lee Behrenfeld, Michael J. Shifts in Phytoplankton Community Structure Across an Anticyclonic Eddy Revealed From High Spectral Resolution Lidar Scattering Measurements |
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envir geo |
description |
Changes in airborne high spectral resolution lidar (HSRL) measurements of scattering, depolarization, and attenuation coincided with a shift in phytoplankton community composition across an anticyclonic eddy in the North Atlantic. We normalized the total depolarization ratio (δ) by the particulate backscattering coefficient (bbp) to account for the covariance in δ and bbp that has been attributed to multiple scattering. A 15% increase in δ/bbp inside the eddy coincided with decreased phytoplankton biomass and a shift to smaller and more elongated phytoplankton cells. Taxonomic changes (reduced dinoflagellate relative abundance inside the eddy) were also observed. The δ signal is thus potentially most sensitive to changes in phytoplankton shape because neither the observed change in the particle size distribution (PSD) nor refractive index (assuming average refractive indices) are consistent with previous theoretical modeling results. We additionally calculated chlorophyll-a (Chl) concentrations from measurements of the diffuse light attenuation coefficient (Kd) and divided by bbp to evaluate another optical metric of phytoplankton community composition (Chl:bbp), which decreased by more than a factor of two inside the eddy. This case study demonstrates that the HSRL is able to detect changes in phytoplankton community composition. High spectral resolution lidar measurements reveal complex structures in both the vertical and horizontal distribution of phytoplankton in the mixed layer providing a valuable new tool to support other remote sensing techniques for studying mixed layer dynamics. Our results identify fronts at the periphery of mesoscale eddies as locations of abrupt changes in near-surface optical properties. |
format |
Text |
author |
Schulien, Jennifer A. Della Penna, Alice Gaube, Peter Chase, Alison P. Haëntjens, Nils Graff, Jason R. Hair, Johnathan W. Hostetler, Chris A. Scarino, Amy Jo Boss, Emmanuel S. Karp-boss, Lee Behrenfeld, Michael J. |
author_facet |
Schulien, Jennifer A. Della Penna, Alice Gaube, Peter Chase, Alison P. Haëntjens, Nils Graff, Jason R. Hair, Johnathan W. Hostetler, Chris A. Scarino, Amy Jo Boss, Emmanuel S. Karp-boss, Lee Behrenfeld, Michael J. |
author_sort |
Schulien, Jennifer A. |
title |
Shifts in Phytoplankton Community Structure Across an Anticyclonic Eddy Revealed From High Spectral Resolution Lidar Scattering Measurements |
title_short |
Shifts in Phytoplankton Community Structure Across an Anticyclonic Eddy Revealed From High Spectral Resolution Lidar Scattering Measurements |
title_full |
Shifts in Phytoplankton Community Structure Across an Anticyclonic Eddy Revealed From High Spectral Resolution Lidar Scattering Measurements |
title_fullStr |
Shifts in Phytoplankton Community Structure Across an Anticyclonic Eddy Revealed From High Spectral Resolution Lidar Scattering Measurements |
title_full_unstemmed |
Shifts in Phytoplankton Community Structure Across an Anticyclonic Eddy Revealed From High Spectral Resolution Lidar Scattering Measurements |
title_sort |
shifts in phytoplankton community structure across an anticyclonic eddy revealed from high spectral resolution lidar scattering measurements |
publisher |
Frontiers Media SA |
publishDate |
2020 |
url |
https://doi.org/10.3389/fmars.2020.00493 https://archimer.ifremer.fr/doc/00641/75313/75809.pdf https://archimer.ifremer.fr/doc/00641/75313/ |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Archimer, archive institutionnelle de l'Ifremer Frontiers In Marine Science (2296-7745) (Frontiers Media SA), 2020-06 , Vol. 7 , N. 493 , P. 13p. |
op_relation |
doi:10.3389/fmars.2020.00493 10670/1.i3sljy https://archimer.ifremer.fr/doc/00641/75313/75809.pdf https://archimer.ifremer.fr/doc/00641/75313/ |
op_rights |
other |
op_doi |
https://doi.org/10.3389/fmars.2020.00493 |
container_title |
Frontiers in Marine Science |
container_volume |
7 |
_version_ |
1766133694975705088 |