Remote sensing of Southern Ocean phytoplankton blooms in a warming world.
Marine phytoplankton are important ubiquitous phototrophs that play an essential role in biogeochemical cycles, mediate global climate, are at the base of food webs and fuel fisheries worldwide. Since 2006, ca. 60-90% of the increase in global ocean heat, associated with the burning of fossil fuels...
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ftunivcanter:oai:ir.canterbury.ac.nz:10092/100142 2023-05-15T13:55:49+02:00 Remote sensing of Southern Ocean phytoplankton blooms in a warming world. Montie, Shinae 2020 application/pdf https://hdl.handle.net/10092/100142 https://doi.org/10.26021/6364 English en eng University of Canterbury https://hdl.handle.net/10092/100142 http://dx.doi.org/10.26021/6364 All Rights Reserved https://canterbury.libguides.com/rights/theses Theses / Dissertations 2020 ftunivcanter https://doi.org/10.26021/6364 2022-09-08T13:30:53Z Marine phytoplankton are important ubiquitous phototrophs that play an essential role in biogeochemical cycles, mediate global climate, are at the base of food webs and fuel fisheries worldwide. Since 2006, ca. 60-90% of the increase in global ocean heat, associated with the burning of fossil fuels has occurred in the Southern Ocean (SO) alone. Being unicellular, short-lived and fast growing, phytoplankton can respond rapidly to changes in sea surface temperature (SST). Concurrent with long-term small increases in average SST, according to the latest IPCC Special Report on the Oceans and Cryosphere (2019), the more dramatic increases in short term warming events, that is marine heatwaves (MHWs), are very likely to also be attributable to global warming. Little is known about how oceanic warming coupled with MHWs will affect phytoplankton distribution and abundances in the SO. This research aims to address this research gap by quantifying the effects of SST anomalies and MHWs on chlorophyll-a (chl-a) concentrations, a proxy for phytoplankton biomass, using satellite measurements of ocean colour and remote sensing applications. First, I correlated SST and chl-a anomalies on a pixel-by-pixel scale for the entire Ross Sea region of the SO over 20 years. The Ross Sea is the most productive region in Antarctica’s coastal zone, accounting for ~30% of total annual primary production. Therefore, a recent observed decrease in chl-a in this region warranted further research scrutiny. Both positive and negative correlations between SST and chl-a anomalies were found. Based on Anova and post hoc Tukey tests, I found that correlations for different zones varied systematically across monthly, seasonal and annual timescales. Highly significant differences occurred between months and seasons, more specifically, between March and December, and autumn and summer, representing the coldest and warmest periods in the year accounted for during this study. Second, I identified all extreme summer MHW events across the SO over a 16 year ... Other/Unknown Material Antarc* Ross Sea Southern Ocean University of Canterbury, Christchurch: UC Research Repository Ross Sea Southern Ocean |
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Open Polar |
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University of Canterbury, Christchurch: UC Research Repository |
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ftunivcanter |
language |
English |
description |
Marine phytoplankton are important ubiquitous phototrophs that play an essential role in biogeochemical cycles, mediate global climate, are at the base of food webs and fuel fisheries worldwide. Since 2006, ca. 60-90% of the increase in global ocean heat, associated with the burning of fossil fuels has occurred in the Southern Ocean (SO) alone. Being unicellular, short-lived and fast growing, phytoplankton can respond rapidly to changes in sea surface temperature (SST). Concurrent with long-term small increases in average SST, according to the latest IPCC Special Report on the Oceans and Cryosphere (2019), the more dramatic increases in short term warming events, that is marine heatwaves (MHWs), are very likely to also be attributable to global warming. Little is known about how oceanic warming coupled with MHWs will affect phytoplankton distribution and abundances in the SO. This research aims to address this research gap by quantifying the effects of SST anomalies and MHWs on chlorophyll-a (chl-a) concentrations, a proxy for phytoplankton biomass, using satellite measurements of ocean colour and remote sensing applications. First, I correlated SST and chl-a anomalies on a pixel-by-pixel scale for the entire Ross Sea region of the SO over 20 years. The Ross Sea is the most productive region in Antarctica’s coastal zone, accounting for ~30% of total annual primary production. Therefore, a recent observed decrease in chl-a in this region warranted further research scrutiny. Both positive and negative correlations between SST and chl-a anomalies were found. Based on Anova and post hoc Tukey tests, I found that correlations for different zones varied systematically across monthly, seasonal and annual timescales. Highly significant differences occurred between months and seasons, more specifically, between March and December, and autumn and summer, representing the coldest and warmest periods in the year accounted for during this study. Second, I identified all extreme summer MHW events across the SO over a 16 year ... |
format |
Other/Unknown Material |
author |
Montie, Shinae |
spellingShingle |
Montie, Shinae Remote sensing of Southern Ocean phytoplankton blooms in a warming world. |
author_facet |
Montie, Shinae |
author_sort |
Montie, Shinae |
title |
Remote sensing of Southern Ocean phytoplankton blooms in a warming world. |
title_short |
Remote sensing of Southern Ocean phytoplankton blooms in a warming world. |
title_full |
Remote sensing of Southern Ocean phytoplankton blooms in a warming world. |
title_fullStr |
Remote sensing of Southern Ocean phytoplankton blooms in a warming world. |
title_full_unstemmed |
Remote sensing of Southern Ocean phytoplankton blooms in a warming world. |
title_sort |
remote sensing of southern ocean phytoplankton blooms in a warming world. |
publisher |
University of Canterbury |
publishDate |
2020 |
url |
https://hdl.handle.net/10092/100142 https://doi.org/10.26021/6364 |
geographic |
Ross Sea Southern Ocean |
geographic_facet |
Ross Sea Southern Ocean |
genre |
Antarc* Ross Sea Southern Ocean |
genre_facet |
Antarc* Ross Sea Southern Ocean |
op_relation |
https://hdl.handle.net/10092/100142 http://dx.doi.org/10.26021/6364 |
op_rights |
All Rights Reserved https://canterbury.libguides.com/rights/theses |
op_doi |
https://doi.org/10.26021/6364 |
_version_ |
1766262689975238656 |