Third revision of the global surface seawater dimethyl sulfide climatology (DMS-Rev3)
This paper presents an updated estimation of the bottom-up global surface seawater dimethyl sulfide (DMS) climatology. This update, called DMS-Rev3, is the third of its kind and includes five significant changes from the last climatology, L11 (Lana et al., 2011), that was released about a decade ago...
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ftcopernicus:oai:publications.copernicus.org:essd96295 2023-05-15T18:18:54+02:00 Third revision of the global surface seawater dimethyl sulfide climatology (DMS-Rev3) Hulswar, Shrivardhan Simó, Rafel Galí, Martí Bell, Thomas G. Lana, Arancha Inamdar, Swaleha Halloran, Paul R. Manville, George Mahajan, Anoop Sharad 2022-07-05 application/pdf https://doi.org/10.5194/essd-14-2963-2022 https://essd.copernicus.org/articles/14/2963/2022/ eng eng doi:10.5194/essd-14-2963-2022 https://essd.copernicus.org/articles/14/2963/2022/ eISSN: 1866-3516 Text 2022 ftcopernicus https://doi.org/10.5194/essd-14-2963-2022 2022-07-11T16:22:43Z This paper presents an updated estimation of the bottom-up global surface seawater dimethyl sulfide (DMS) climatology. This update, called DMS-Rev3, is the third of its kind and includes five significant changes from the last climatology, L11 (Lana et al., 2011), that was released about a decade ago. The first change is the inclusion of new observations that have become available over the last decade, creating a database of 873 539 observations leading to an ∼ 18-fold increase in raw data as compared to the last estimation. The second is significant improvements in data handling, processing, and filtering, to avoid biases due to different observation frequencies which result from different measurement techniques. Thirdly, we incorporate the dynamic seasonal changes observed in the geographic boundaries of the ocean biogeochemical provinces. The fourth change involves the refinement of the interpolation algorithm used to fill in the missing data. Lastly, an upgraded smoothing algorithm based on observed DMS variability length scales (VLS) helps to reproduce a more realistic distribution of the DMS concentration data. The results show that DMS-Rev3 estimates the global annual mean DMS concentration to be ∼ 2.26 nM (2.39 nM without a sea-ice mask), i.e., about 4 % lower than the previous bottom-up L11 climatology. However, significant regional differences of more than 100 % as compared to L11 are observed. The global sea-to-air flux of DMS is estimated at ∼ 27.1 TgS yr −1 , which is about 4 % lower than L11, although, like the DMS distribution, large regional differences were observed. The largest changes are observed in high concentration regions such as the polar oceans, although oceanic regions that were under-sampled in the past also show large differences between revisions of the climatology. Finally, DMS-Rev3 reduces the previously observed patchiness in high productivity regions. The new climatology, along with the algorithm, can be found in the online repository: https://doi.org/10.17632/hyn62spny2.1 ... Text Sea ice Copernicus Publications: E-Journals Earth System Science Data 14 7 2963 2987 |
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Open Polar |
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Copernicus Publications: E-Journals |
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ftcopernicus |
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English |
description |
This paper presents an updated estimation of the bottom-up global surface seawater dimethyl sulfide (DMS) climatology. This update, called DMS-Rev3, is the third of its kind and includes five significant changes from the last climatology, L11 (Lana et al., 2011), that was released about a decade ago. The first change is the inclusion of new observations that have become available over the last decade, creating a database of 873 539 observations leading to an ∼ 18-fold increase in raw data as compared to the last estimation. The second is significant improvements in data handling, processing, and filtering, to avoid biases due to different observation frequencies which result from different measurement techniques. Thirdly, we incorporate the dynamic seasonal changes observed in the geographic boundaries of the ocean biogeochemical provinces. The fourth change involves the refinement of the interpolation algorithm used to fill in the missing data. Lastly, an upgraded smoothing algorithm based on observed DMS variability length scales (VLS) helps to reproduce a more realistic distribution of the DMS concentration data. The results show that DMS-Rev3 estimates the global annual mean DMS concentration to be ∼ 2.26 nM (2.39 nM without a sea-ice mask), i.e., about 4 % lower than the previous bottom-up L11 climatology. However, significant regional differences of more than 100 % as compared to L11 are observed. The global sea-to-air flux of DMS is estimated at ∼ 27.1 TgS yr −1 , which is about 4 % lower than L11, although, like the DMS distribution, large regional differences were observed. The largest changes are observed in high concentration regions such as the polar oceans, although oceanic regions that were under-sampled in the past also show large differences between revisions of the climatology. Finally, DMS-Rev3 reduces the previously observed patchiness in high productivity regions. The new climatology, along with the algorithm, can be found in the online repository: https://doi.org/10.17632/hyn62spny2.1 ... |
format |
Text |
author |
Hulswar, Shrivardhan Simó, Rafel Galí, Martí Bell, Thomas G. Lana, Arancha Inamdar, Swaleha Halloran, Paul R. Manville, George Mahajan, Anoop Sharad |
spellingShingle |
Hulswar, Shrivardhan Simó, Rafel Galí, Martí Bell, Thomas G. Lana, Arancha Inamdar, Swaleha Halloran, Paul R. Manville, George Mahajan, Anoop Sharad Third revision of the global surface seawater dimethyl sulfide climatology (DMS-Rev3) |
author_facet |
Hulswar, Shrivardhan Simó, Rafel Galí, Martí Bell, Thomas G. Lana, Arancha Inamdar, Swaleha Halloran, Paul R. Manville, George Mahajan, Anoop Sharad |
author_sort |
Hulswar, Shrivardhan |
title |
Third revision of the global surface seawater dimethyl sulfide climatology (DMS-Rev3) |
title_short |
Third revision of the global surface seawater dimethyl sulfide climatology (DMS-Rev3) |
title_full |
Third revision of the global surface seawater dimethyl sulfide climatology (DMS-Rev3) |
title_fullStr |
Third revision of the global surface seawater dimethyl sulfide climatology (DMS-Rev3) |
title_full_unstemmed |
Third revision of the global surface seawater dimethyl sulfide climatology (DMS-Rev3) |
title_sort |
third revision of the global surface seawater dimethyl sulfide climatology (dms-rev3) |
publishDate |
2022 |
url |
https://doi.org/10.5194/essd-14-2963-2022 https://essd.copernicus.org/articles/14/2963/2022/ |
genre |
Sea ice |
genre_facet |
Sea ice |
op_source |
eISSN: 1866-3516 |
op_relation |
doi:10.5194/essd-14-2963-2022 https://essd.copernicus.org/articles/14/2963/2022/ |
op_doi |
https://doi.org/10.5194/essd-14-2963-2022 |
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Earth System Science Data |
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14 |
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7 |
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2963 |
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2987 |
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