Claudia Frey

762 total citations
30 papers, 412 citations indexed

About

Claudia Frey is a scholar working on Oceanography, Ecology and Pollution. According to data from OpenAlex, Claudia Frey has authored 30 papers receiving a total of 412 indexed citations (citations by other indexed papers that have themselves been cited), including 20 papers in Oceanography, 16 papers in Ecology and 12 papers in Pollution. Recurrent topics in Claudia Frey's work include Marine and coastal ecosystems (20 papers), Wastewater Treatment and Nitrogen Removal (12 papers) and Microbial Community Ecology and Physiology (9 papers). Claudia Frey is often cited by papers focused on Marine and coastal ecosystems (20 papers), Wastewater Treatment and Nitrogen Removal (12 papers) and Microbial Community Ecology and Physiology (9 papers). Claudia Frey collaborates with scholars based in Switzerland, United States and Germany. Claudia Frey's co-authors include Maren Voß, Bess B. Ward, Xin Sun, Amal Jayakumar, Frederike Korth, Cliff S. Law, Nicola Wannicke, Barbara Deutsch, Emilio García‐Robledo and Susanna Hietanen and has published in prestigious journals such as Environmental Science & Technology, Global Change Biology and Limnology and Oceanography.

In The Last Decade

Claudia Frey

27 papers receiving 408 citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
Claudia Frey Switzerland 11 238 235 141 90 87 30 412
Elizabeth K. Robertson Sweden 10 191 0.8× 171 0.7× 195 1.4× 90 1.0× 154 1.8× 17 463
Sheryl Oliveira Fernandes India 13 328 1.4× 112 0.5× 164 1.2× 58 0.6× 109 1.3× 25 507
SA Sañudo-Wilhelmy United States 7 163 0.7× 247 1.1× 81 0.6× 68 0.8× 101 1.2× 8 442
Wei Wen Wong Australia 11 219 0.9× 134 0.6× 78 0.6× 143 1.6× 133 1.5× 33 413
William Porubsky United States 8 201 0.8× 137 0.6× 62 0.4× 87 1.0× 127 1.5× 10 355
Jeffrey Abell United States 7 186 0.8× 335 1.4× 94 0.7× 61 0.7× 129 1.5× 8 471
Hang Gao Germany 4 191 0.8× 136 0.6× 162 1.1× 41 0.5× 95 1.1× 7 312
Birgit Nagel Germany 10 255 1.1× 240 1.0× 133 0.9× 42 0.5× 76 0.9× 11 442
Fengyu Deng China 7 294 1.2× 143 0.6× 258 1.8× 37 0.4× 202 2.3× 8 482
Helena Jäntti Finland 9 176 0.7× 190 0.8× 118 0.8× 31 0.3× 126 1.4× 15 324

Countries citing papers authored by Claudia Frey

Since Specialization
Citations

This map shows the geographic impact of Claudia Frey'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 Claudia Frey with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Claudia Frey more than expected).

Fields of papers citing papers by Claudia Frey

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Claudia Frey. 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 Claudia Frey. The network helps show where Claudia Frey may publish in the future.

Co-authorship network of co-authors of Claudia Frey

This figure shows the co-authorship network connecting the top 25 collaborators of Claudia Frey. A scholar is included among the top collaborators of Claudia Frey 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 Claudia Frey. Claudia Frey 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.
Frey, Claudia, Christiane Hassenrück, Moritz F. Lehmann, et al.. (2025). Processes and microorganisms driving nitrous oxide production in the Benguela Upwelling System. Limnology and Oceanography. 70(4). 850–869. 1 indexed citations
2.
Richardson, Christina, Bernhard Peucker‐Ehrenbrink, Annie Bourbonnais, et al.. (2025). Effects of climate change on river and groundwater nutrient inputs to the coastal ocean. Communications Earth & Environment. 6(1).
3.
Baya, Pascale A., et al.. (2024). Isotopomer labeling and oxygen dependence of hybrid nitrous oxide production. Biogeosciences. 21(14). 3215–3238. 2 indexed citations
4.
Frey, Claudia, Weiyi Tang, Bess B. Ward, & Moritz F. Lehmann. (2024). Sample preservation methods for nitrous oxide concentration and isotope ratio measurements in aquatic environments. Limnology and Oceanography Methods. 22(10). 771–788. 1 indexed citations
5.
Tang, Weiyi, Bess B. Ward, Laura A. Bristow, et al.. (2023). Database of nitrification and nitrifiers in the global ocean. Earth system science data. 15(11). 5039–5077. 14 indexed citations
6.
Förster, Stefan, et al.. (2023). The Amazon shelf sediments, a reactor that fuels intense nitrogen cycling at the seabed. Limnology and Oceanography. 68(10). 2211–2226. 1 indexed citations
7.
Manning, Cara C., et al.. (2023). Pyisotopomer: A Python package for obtaining intramolecular isotope ratio differences from mass spectrometric analysis of nitrous oxide isotopocules. Rapid Communications in Mass Spectrometry. 37(11). e9513–e9513. 6 indexed citations
8.
Babbin, Andrew R., Elizabeth Wallace, Xin Sun, et al.. (2023). All about nitrite: exploring nitrite sources and sinks in the eastern tropical North Pacific oxygen minimum zone. Biogeosciences. 20(12). 2499–2523. 8 indexed citations
9.
10.
Zopfi, Jakob, Claudia Frey, Paul Magyar, et al.. (2022). Isotopic signatures of biotic and abiotic N2O production and consumption in the water column of meromictic, ferruginous Lake La Cruz (Spain). Limnology and Oceanography. 67(8). 1760–1775. 5 indexed citations
11.
Frey, Claudia, et al.. (2022). Einfluss der traumazentrierten Psychotherapie mit EMDR-Therapie auf somatische Komorbiditäten. MMW - Fortschritte der Medizin. 164(S8). 9–12.
12.
Sun, Xin, Claudia Frey, Emilio García‐Robledo, Amal Jayakumar, & Bess B. Ward. (2021). Microbial niche differentiation explains nitrite oxidation in marine oxygen minimum zones. The ISME Journal. 15(5). 1317–1329. 39 indexed citations
13.
Sun, Xin, Claudia Frey, Emilio García‐Robledo, Amal Jayakumar, & Bess B. Ward. (2021). Correction: Microbial niche differentiation explains nitrite oxidation in marine oxygen minimum zones. The ISME Journal. 15(8). 2492–2492. 1 indexed citations
14.
Frey, Claudia, Hermann W. Bange, Eric P. Achterberg, et al.. (2020). Regulation of nitrous oxide production in low-oxygen waters off the coast of Peru. Biogeosciences. 17(8). 2263–2287. 55 indexed citations
15.
Zopfi, Jakob, et al.. (2019). Direct O 2 control on the partitioning between denitrification and dissimilatory nitrate reduction to ammonium in lake sediments. Biogeosciences. 16(23). 4705–4718. 23 indexed citations
16.
Wannicke, Nicola, Claudia Frey, Cliff S. Law, & Maren Voß. (2018). The response of the marine nitrogen cycle to ocean acidification. Global Change Biology. 24(11). 5031–5043. 48 indexed citations
17.
Ji, Qixing, Claudia Frey, Xin Sun, et al.. (2018). Nitrogen and oxygen availabilities control water column nitrous oxide production during seasonal anoxia in the Chesapeake Bay. Biogeosciences. 15(20). 6127–6138. 23 indexed citations
18.
19.
Korth, Frederike, et al.. (2014). Nitrate source identification in the Baltic Sea using its isotopic ratios in combination with a Bayesian isotope mixing model. Biogeosciences. 11(17). 4913–4924. 56 indexed citations
20.
Frey, Claudia, et al.. (2009). Repurposing virtual patients within the electronic virtual patient (eVIP) project.. Bio-Algorithms and Med-Systems. 5. 84. 2 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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2026