Sandy Thomalla

3.1k total citations
60 papers, 1.3k citations indexed

About

Sandy Thomalla is a scholar working on Oceanography, Ecology and Global and Planetary Change. According to data from OpenAlex, Sandy Thomalla has authored 60 papers receiving a total of 1.3k indexed citations (citations by other indexed papers that have themselves been cited), including 59 papers in Oceanography, 20 papers in Ecology and 11 papers in Global and Planetary Change. Recurrent topics in Sandy Thomalla's work include Marine and coastal ecosystems (56 papers), Marine Biology and Ecology Research (35 papers) and Oceanographic and Atmospheric Processes (25 papers). Sandy Thomalla is often cited by papers focused on Marine and coastal ecosystems (56 papers), Marine Biology and Ecology Research (35 papers) and Oceanographic and Atmospheric Processes (25 papers). Sandy Thomalla collaborates with scholars based in South Africa, United Kingdom and United States. Sandy Thomalla's co-authors include Sebastiaan Swart, Pedro M. S. Monteiro, Thomas Ryan‐Keogh, Nicolas Fauchereau, Robert Turnewitsch, Richard Sanders, Mike Lucas, Alex J. Poulton, Marié Smith and Sarah Nicholson and has published in prestigious journals such as Science, The Science of The Total Environment and Geophysical Research Letters.

In The Last Decade

Sandy Thomalla

59 papers receiving 1.3k citations

Peers — A (Enhanced Table)

Peers by citation overlap · career bar shows stage (early→late) cites · hero ref

Name h Career Trend Papers Cites
Sandy Thomalla South Africa 22 1.2k 414 320 218 111 60 1.3k
Eric Rehm United States 9 915 0.8× 303 0.7× 282 0.9× 142 0.7× 91 0.8× 20 1.1k
Arvind Singh India 20 775 0.6× 383 0.9× 341 1.1× 266 1.2× 137 1.2× 63 1.1k
Anna Luchetta Italy 11 1.5k 1.2× 500 1.2× 522 1.6× 409 1.9× 131 1.2× 15 1.7k
Sinjae Yoo South Korea 17 995 0.8× 363 0.9× 396 1.2× 175 0.8× 99 0.9× 35 1.1k
Nuncio Murukesh India 16 796 0.7× 212 0.5× 488 1.5× 406 1.9× 79 0.7× 42 1.1k
Gilberto Gaxiola‐Castro Mexico 22 923 0.8× 361 0.9× 523 1.6× 116 0.5× 126 1.1× 73 1.3k
Sarah L. C. Giering United Kingdom 17 963 0.8× 476 1.1× 271 0.8× 116 0.5× 153 1.4× 40 1.2k
Kevin L. Mahoney United States 6 534 0.4× 350 0.8× 206 0.6× 147 0.7× 101 0.9× 9 769
Khalid Elkalay Morocco 14 836 0.7× 189 0.5× 270 0.8× 163 0.7× 161 1.5× 31 1.0k
Nils Haëntjens United States 16 812 0.7× 264 0.6× 260 0.8× 168 0.8× 65 0.6× 27 972

Countries citing papers authored by Sandy Thomalla

Since Specialization
Citations

This map shows the geographic impact of Sandy Thomalla's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by Sandy Thomalla with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Sandy Thomalla more than expected).

Fields of papers citing papers by Sandy Thomalla

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Sandy Thomalla. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by Sandy Thomalla. The network helps show where Sandy Thomalla may publish in the future.

Co-authorship network of co-authors of Sandy Thomalla

This figure shows the co-authorship network connecting the top 25 collaborators of Sandy Thomalla. A scholar is included among the top collaborators of Sandy Thomalla based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with Sandy Thomalla. Sandy Thomalla is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

20 of 20 papers shown
1.
Nicholson, Sarah, Thomas Ryan‐Keogh, Sandy Thomalla, Nicolette Chang, & Marié Smith. (2025). Satellite-derived global-ocean phytoplankton phenology indices. Earth system science data. 17(5). 1959–1975. 3 indexed citations
2.
Thomalla, Sandy, Susanne Fietz, Saumik Samanta, et al.. (2025). Phytoplankton iron limitation in the Atlantic Southern Ocean driven by seasonal mixed‐layer dynamics. Limnology and Oceanography Letters. 10(6). 877–887. 1 indexed citations
3.
Ryan‐Keogh, Thomas, Alessandro Tagliabue, & Sandy Thomalla. (2025). Global decline in net primary production underestimated by climate models. Communications Earth & Environment. 6(1). 75–75. 4 indexed citations
4.
Boyd, Philip W., Kevin R. Arrigo, Mathieu Ardyna, et al.. (2024). The role of biota in the Southern Ocean carbon cycle. Nature Reviews Earth & Environment. 5(5). 390–408. 13 indexed citations
5.
Gregor, Luke, Jerry Tjiputra, Judith Hauck, et al.. (2024). Projected poleward migration of the Southern Ocean CO2 sink region under high emissions. Communications Earth & Environment. 5(1). 3 indexed citations
6.
Ryan‐Keogh, Thomas, et al.. (2023). Spatial and temporal drivers of fluorescence quantum yield variability in the Southern Ocean. Limnology and Oceanography. 68(3). 569–582. 3 indexed citations
7.
Ryan‐Keogh, Thomas, et al.. (2023). A new global oceanic multi-model net primary productivity data product. Earth system science data. 15(11). 4829–4848. 13 indexed citations
8.
Thomalla, Sandy, Marcel du Plessis, Nicolas Fauchereau, et al.. (2023). Southern Ocean phytoplankton dynamics and carbon export: insights from a seasonal cycle approach. Philosophical Transactions of the Royal Society A Mathematical Physical and Engineering Sciences. 381(2249). 20220068–20220068. 7 indexed citations
9.
Fietz, Susanne, Sandy Thomalla, Murat V. Ardelan, et al.. (2023). Absence of photophysiological response to iron addition in autumn phytoplankton in the Antarctic sea-ice zone. Biogeosciences. 20(14). 3073–3091. 3 indexed citations
10.
Swart, Sebastiaan, Marcel du Plessis, Sarah Nicholson, et al.. (2023). The Southern Ocean mixed layer and its boundary fluxes: fine-scale observational progress and future research priorities. Philosophical Transactions of the Royal Society A Mathematical Physical and Engineering Sciences. 381(2249). 20220058–20220058. 12 indexed citations
11.
Nicholson, Sarah, et al.. (2023). Sea‐Ice Impacts Inter‐Annual Variability of Phytoplankton Bloom Characteristics and Carbon Export in the Weddell Sea. Geophysical Research Letters. 50(16). 6 indexed citations
12.
Thomalla, Sandy & Thomas Ryan‐Keogh. (2022). Understanding the sensitivity of the Southern Ocean Biological Carbon pump to climate change: Insights from a seasonal cycle approach. Zenodo (CERN European Organization for Nuclear Research). 1 indexed citations
13.
Sun, Xin, et al.. (2022). Controls on nitrite oxidation in the upper Southern Ocean: insights from winter kinetics experiments in the Indian sector. Biogeosciences. 19(14). 3425–3444. 8 indexed citations
14.
Sun, Xin, Shantelle Smith, Alakendra N. Roychoudhury, et al.. (2022). The kinetics of ammonium uptake and oxidation across the Southern Ocean. Limnology and Oceanography. 67(4). 973–991. 11 indexed citations
15.
Thomalla, Sandy, Thomas Ryan‐Keogh, Alessandro Tagliabue, & Pedro M. S. Monteiro. (2021). Long term trend of increasing iron stress in Southern Ocean phytoplankton. 1 indexed citations
16.
Thomalla, Sandy, et al.. (2020). The Seasonal Cycle of Nitrogen Uptake and Nitrification in the Atlantic Sector of the Southern Ocean. Global Biogeochemical Cycles. 34(7). 33 indexed citations
17.
Mtshali, Thato N., Sandy Thomalla, Thomas Ryan‐Keogh, et al.. (2019). Seasonal Depletion of the Dissolved Iron Reservoirs in the Sub‐Antarctic Zone of the Southern Atlantic Ocean. Geophysical Research Letters. 46(8). 4386–4395. 21 indexed citations
18.
Ryan‐Keogh, Thomas, et al.. (2018). Seasonal regulation of the coupling between photosynthetic electron transport and carbon fixation in the Southern Ocean. Limnology and Oceanography. 63(5). 1856–1876. 10 indexed citations
19.
Thomalla, Sandy, et al.. (2017). An optimized method for correcting fluorescence quenching using optical backscattering on autonomous platforms. Limnology and Oceanography Methods. 16(2). 132–144. 42 indexed citations
20.
Ryan‐Keogh, Thomas, et al.. (2017). Modelled estimates of spatial variability of iron stress in the Atlantic sector of the Southern Ocean. Biogeosciences. 14(17). 3883–3897. 7 indexed citations

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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