Presentation_1_Predictability of Seawater DMS During the North Atlantic Aerosol and Marine Ecosystem Study (NAAMES).pdf
This work presents an overview of a unique set of surface ocean dimethylsulfide (DMS) measurements from four shipboard field campaigns conducted during the North Atlantic Aerosol and Marine Ecosystem Study (NAAMES) project. Variations in surface seawater DMS are discussed in relation to biological a...
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ftfrontimediafig:oai:figshare.com:article/13603316 2023-05-15T17:28:11+02:00 Presentation_1_Predictability of Seawater DMS During the North Atlantic Aerosol and Marine Ecosystem Study (NAAMES).pdf Thomas G. Bell Jack G. Porter Wei-Lei Wang Michael J. Lawler Emmanuel Boss Michael J. Behrenfeld Eric S. Saltzman 2021-01-18T11:35:49Z https://doi.org/10.3389/fmars.2020.596763.s001 https://figshare.com/articles/presentation/Presentation_1_Predictability_of_Seawater_DMS_During_the_North_Atlantic_Aerosol_and_Marine_Ecosystem_Study_NAAMES_pdf/13603316 unknown doi:10.3389/fmars.2020.596763.s001 https://figshare.com/articles/presentation/Presentation_1_Predictability_of_Seawater_DMS_During_the_North_Atlantic_Aerosol_and_Marine_Ecosystem_Study_NAAMES_pdf/13603316 CC BY 4.0 CC-BY Oceanography Marine Biology Marine Geoscience Biological Oceanography Chemical Oceanography Physical Oceanography Marine Engineering dimethylsulfide North Atlantic marine aerosol DMS artificial neural network Text Presentation 2021 ftfrontimediafig https://doi.org/10.3389/fmars.2020.596763.s001 2021-01-20T23:58:11Z This work presents an overview of a unique set of surface ocean dimethylsulfide (DMS) measurements from four shipboard field campaigns conducted during the North Atlantic Aerosol and Marine Ecosystem Study (NAAMES) project. Variations in surface seawater DMS are discussed in relation to biological and physical observations. Results are considered at a range of timescales (seasons to days) and spatial scales (regional to sub-mesoscale). Elevated DMS concentrations are generally associated with greater biological productivity, although chlorophyll a (Chl) only explains a small fraction of the DMS variability (15%). Physical factors that determine the location of oceanic temperature fronts and depth of vertical mixing have an important influence on seawater DMS concentrations during all seasons. The interplay of biomass and physics influences DMS concentrations at regional/seasonal scales and at smaller spatial and shorter temporal scales. Seawater DMS measurements are compared with the global seawater DMS climatology and predictions made using a recently published algorithm and by a neural network model. The climatology is successful at capturing the seasonal progression in average seawater DMS, but does not reproduce the shorter spatial/temporal scale variability. The input terms common to the algorithm and neural network approaches are biological (Chl) and physical (mixed layer depth, photosynthetically active radiation, seawater temperature). Both models predict the seasonal North Atlantic average seawater DMS trends better than the climatology. However, DMS concentrations tend to be under-predicted and the episodic occurrence of higher DMS concentrations is poorly predicted. The choice of climatological seawater DMS product makes a substantial impact on the estimated DMS flux into the North Atlantic atmosphere. These results suggest that additional input terms are needed to improve the predictive capability of current state-of-the-art approaches to estimating seawater DMS. Conference Object North Atlantic Frontiers: Figshare |
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Open Polar |
collection |
Frontiers: Figshare |
op_collection_id |
ftfrontimediafig |
language |
unknown |
topic |
Oceanography Marine Biology Marine Geoscience Biological Oceanography Chemical Oceanography Physical Oceanography Marine Engineering dimethylsulfide North Atlantic marine aerosol DMS artificial neural network |
spellingShingle |
Oceanography Marine Biology Marine Geoscience Biological Oceanography Chemical Oceanography Physical Oceanography Marine Engineering dimethylsulfide North Atlantic marine aerosol DMS artificial neural network Thomas G. Bell Jack G. Porter Wei-Lei Wang Michael J. Lawler Emmanuel Boss Michael J. Behrenfeld Eric S. Saltzman Presentation_1_Predictability of Seawater DMS During the North Atlantic Aerosol and Marine Ecosystem Study (NAAMES).pdf |
topic_facet |
Oceanography Marine Biology Marine Geoscience Biological Oceanography Chemical Oceanography Physical Oceanography Marine Engineering dimethylsulfide North Atlantic marine aerosol DMS artificial neural network |
description |
This work presents an overview of a unique set of surface ocean dimethylsulfide (DMS) measurements from four shipboard field campaigns conducted during the North Atlantic Aerosol and Marine Ecosystem Study (NAAMES) project. Variations in surface seawater DMS are discussed in relation to biological and physical observations. Results are considered at a range of timescales (seasons to days) and spatial scales (regional to sub-mesoscale). Elevated DMS concentrations are generally associated with greater biological productivity, although chlorophyll a (Chl) only explains a small fraction of the DMS variability (15%). Physical factors that determine the location of oceanic temperature fronts and depth of vertical mixing have an important influence on seawater DMS concentrations during all seasons. The interplay of biomass and physics influences DMS concentrations at regional/seasonal scales and at smaller spatial and shorter temporal scales. Seawater DMS measurements are compared with the global seawater DMS climatology and predictions made using a recently published algorithm and by a neural network model. The climatology is successful at capturing the seasonal progression in average seawater DMS, but does not reproduce the shorter spatial/temporal scale variability. The input terms common to the algorithm and neural network approaches are biological (Chl) and physical (mixed layer depth, photosynthetically active radiation, seawater temperature). Both models predict the seasonal North Atlantic average seawater DMS trends better than the climatology. However, DMS concentrations tend to be under-predicted and the episodic occurrence of higher DMS concentrations is poorly predicted. The choice of climatological seawater DMS product makes a substantial impact on the estimated DMS flux into the North Atlantic atmosphere. These results suggest that additional input terms are needed to improve the predictive capability of current state-of-the-art approaches to estimating seawater DMS. |
format |
Conference Object |
author |
Thomas G. Bell Jack G. Porter Wei-Lei Wang Michael J. Lawler Emmanuel Boss Michael J. Behrenfeld Eric S. Saltzman |
author_facet |
Thomas G. Bell Jack G. Porter Wei-Lei Wang Michael J. Lawler Emmanuel Boss Michael J. Behrenfeld Eric S. Saltzman |
author_sort |
Thomas G. Bell |
title |
Presentation_1_Predictability of Seawater DMS During the North Atlantic Aerosol and Marine Ecosystem Study (NAAMES).pdf |
title_short |
Presentation_1_Predictability of Seawater DMS During the North Atlantic Aerosol and Marine Ecosystem Study (NAAMES).pdf |
title_full |
Presentation_1_Predictability of Seawater DMS During the North Atlantic Aerosol and Marine Ecosystem Study (NAAMES).pdf |
title_fullStr |
Presentation_1_Predictability of Seawater DMS During the North Atlantic Aerosol and Marine Ecosystem Study (NAAMES).pdf |
title_full_unstemmed |
Presentation_1_Predictability of Seawater DMS During the North Atlantic Aerosol and Marine Ecosystem Study (NAAMES).pdf |
title_sort |
presentation_1_predictability of seawater dms during the north atlantic aerosol and marine ecosystem study (naames).pdf |
publishDate |
2021 |
url |
https://doi.org/10.3389/fmars.2020.596763.s001 https://figshare.com/articles/presentation/Presentation_1_Predictability_of_Seawater_DMS_During_the_North_Atlantic_Aerosol_and_Marine_Ecosystem_Study_NAAMES_pdf/13603316 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
doi:10.3389/fmars.2020.596763.s001 https://figshare.com/articles/presentation/Presentation_1_Predictability_of_Seawater_DMS_During_the_North_Atlantic_Aerosol_and_Marine_Ecosystem_Study_NAAMES_pdf/13603316 |
op_rights |
CC BY 4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.3389/fmars.2020.596763.s001 |
_version_ |
1766120726663790592 |