Giddy, ISNicholson, Sarah-AnneQueste, RYThomalla, Sandy JSwart, S2023-10-262023-10-262023-08Giddy, I., Nicholson, S., Queste, R., Thomalla, S.J. & Swart, S. 2023. Sea-ice impacts inter-annual variability in bloom phenology and carbon export in the Weddell Sea. <i>Geophysical Research Letters, 50(16).</i> http://hdl.handle.net/10204/131790094-82761944-8007https://doi.org/10.1029/2023GL103695http://hdl.handle.net/10204/13179The Antarctic Marginal Ice Zone (MIZ) accounts for 15% of the Southern Ocean's primary production (PP), but limited data has hindered understanding of its variability and connection to carbon export. Using a combination of gliders, biogeochemical Argo floats and satellite observations in the northeast Weddell Sea, we show that years with more sea-ice formation over winter are followed by more intense phytoplankton blooms (~15% greater daily PP) and export to 100 m (~50% higher daily carbon export) the following summer. However, the carbon export beyond the deepest winter mixed layer did not vary in proportion to PP, suggesting different drivers of carbon export at depth compared to surface waters. Furthermore, across the entire MIZ, the response of blooms to sea-ice volume was spatially variable, indicating the need to consider spatial heterogeneity in the response of the biological carbon pump to future sea-ice changes.FulltextenAntarctic marginal ice zoneBloom phenologyCarbon exportSea-ice impactWeddell SeaArticleGiddy, I., Nicholson, S., Queste, R., Thomalla, S. J., & Swart, S. (2023). Sea-ice impacts inter-annual variability in bloom phenology and carbon export in the Weddell Sea. <i>Geophysical Research Letters, 50(16)</i>, http://hdl.handle.net/10204/13179Giddy, IS, Sarah-Anne Nicholson, RY Queste, Sandy J Thomalla, and S Swart "Sea-ice impacts inter-annual variability in bloom phenology and carbon export in the Weddell Sea." <i>Geophysical Research Letters, 50(16)</i> (2023) http://hdl.handle.net/10204/13179Giddy I, Nicholson S, Queste R, Thomalla SJ, Swart S. Sea-ice impacts inter-annual variability in bloom phenology and carbon export in the Weddell Sea. Geophysical Research Letters, 50(16). 2023; http://hdl.handle.net/10204/13179.TY - Article AU - Giddy, IS AU - Nicholson, Sarah-Anne AU - Queste, RY AU - Thomalla, Sandy J AU - Swart, S AB - The Antarctic Marginal Ice Zone (MIZ) accounts for 15% of the Southern Ocean's primary production (PP), but limited data has hindered understanding of its variability and connection to carbon export. Using a combination of gliders, biogeochemical Argo floats and satellite observations in the northeast Weddell Sea, we show that years with more sea-ice formation over winter are followed by more intense phytoplankton blooms (~15% greater daily PP) and export to 100 m (~50% higher daily carbon export) the following summer. However, the carbon export beyond the deepest winter mixed layer did not vary in proportion to PP, suggesting different drivers of carbon export at depth compared to surface waters. Furthermore, across the entire MIZ, the response of blooms to sea-ice volume was spatially variable, indicating the need to consider spatial heterogeneity in the response of the biological carbon pump to future sea-ice changes. DA - 2023-08 DB - ResearchSpace DP - CSIR J1 - Geophysical Research Letters, 50(16) KW - Antarctic marginal ice zone KW - Bloom phenology KW - Carbon export KW - Sea-ice impact KW - Weddell Sea LK - https://researchspace.csir.co.za PY - 2023 SM - 0094-8276 SM - 1944-8007 T1 - Sea-ice impacts inter-annual variability in bloom phenology and carbon export in the Weddell Sea TI - Sea-ice impacts inter-annual variability in bloom phenology and carbon export in the Weddell Sea UR - http://hdl.handle.net/10204/13179 ER -26991