Research Group Leader of Southern Ocean Carbon-Climate Observatory (SOCCO), Principal Researcher at CSIR. Ocean biogeochemist

Cape Town
Joined August 2014
For the record - I am deactivating my twitter/ X account. ... cause elon.
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📰 Preprint now available ' Observed global ocean phytoplankton phenology indices' by Sarah-Anne Nicholson, Thomas Ryan-Keogh, Sandy. Thomalla, Nicolette Chang, & Marie Smith #SANAP @SOCCO_Science @dsigovza @NRF_News @environmentza @ESSD_journal essd.copernicus.org/preprint…
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Sandy Thomalla retweeted
🚨JOB ALERT🚨 We are recruiting for 2 new positions to work on ocean-climate modelling and model development. Applications close 1st January. Go to csir.co.za/vacancies and search for refs: 313330 or 313331 Please note South African candidates will be given preference.
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Sandy Thomalla retweeted
Junior researcher Thulwaneng Mashifane, @SOCCO_Science RGL Dr Sandy Thomalla & senior researcher Precious Mongwe represented #TeamCSIR as speakers at the All-Atlantic Ocean Research & Innovation Alliance that was held on 21 & 22 Nov at the CT ICC. socco.org.za/ for more
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Catching up with @bdwake and @OceanTerra at the @WCRP_climate conference in Kigali, Rwanda. All past participants of the XX Dissertations Symposium in Chemical Oceanography (DISCO), Honolulu Hawaii, where we first met in 2006.
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For access to the data you can check out the @SOCCO_Science Zenodo repository where we will be applying regular updates going forward to this data product zenodo.org/communities/socco…
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By proving multiple algorithms we hope that users can interrogate the distribution of NPP to identify consensus or outliers for informed decisions of regional analyses
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Here we took 5 different algorithms and applied them to the @esa @PlymouthMarine Ocean Colour Climate Change Initiative data to develop one of the longest records available for NPP
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Sandy Thomalla retweeted
Today our Research Group Leader @SandyThomalla spoke about “Trends in Southern Ocean phytoplankton bloom phenology, primary production and iron stress” at the @WCRP_climate conference
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Not sure if anyone still uses Twitter these days(!), but I want to get the word out that I will soon be hiring 2 postdocs (and recruiting PhD students) to join me at the University of St Andrews in Scotland. All things ocean, carbon, and climate. (1/2)
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Proud to share my first author and first publication from my Ph.D co-authored by @SandyThomalla @oceanchiq et al. Here, we use historical datasets and satellite match-ups to develop a remote sensing algorithm for detection of multiple phytoplankton groups in the Benguela.
New Research: Remote sensing of phytoplankton community composition in the northern Benguela upwelling system: Marine phytoplankton in the northern Benguela upwelling system (nBUS) serve as a food and energy source fuelling marine food… #MarineScience frontiersin.org/articles/10.…
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Sandy Thomalla retweeted
The authors @SandyThomalla @Phytoplankton @tjryankeogh & @oceanchiq would like to thank all the institutions and funding bodies which made this research possible @CSIR @dsigovza @NRF_News @MARIS_UCT
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Sandy Thomalla retweeted
We may have found one of the reasons why larger marine species such as whales, seabirds and seals have begun to alter their breeding and feeding patterns across the Southern Ocean
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Sandy Thomalla retweeted
Seasonal adjustments such as this also raise concerns that the base of the food web may become desynchronised from higher tropic levels, known as the match/mis-match hypothesis.
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Sandy Thomalla retweeted
The seasonal adjustments we find are being driven by large scale changes in ocean physics and chemistry, which could impact global climate by altering natural CO2 uptake
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Sandy Thomalla retweeted
Over 10 years ago @SandyThomalla classified the Southern Ocean into regimes using chlorophyll-a and seasonality. Here we are able to do the same classification and look at how it is changing.
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Sandy Thomalla retweeted
The robustness of these trends were tested using different methods to calculate the phenology. The trends were the same across the methods
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