Helmut Willems

2.7k total citations
82 papers, 2.2k citations indexed

About

Helmut Willems is a scholar working on Atmospheric Science, Paleontology and Oceanography. According to data from OpenAlex, Helmut Willems has authored 82 papers receiving a total of 2.2k indexed citations (citations by other indexed papers that have themselves been cited), including 53 papers in Atmospheric Science, 43 papers in Paleontology and 37 papers in Oceanography. Recurrent topics in Helmut Willems's work include Geology and Paleoclimatology Research (53 papers), Paleontology and Stratigraphy of Fossils (39 papers) and Marine and coastal ecosystems (27 papers). Helmut Willems is often cited by papers focused on Geology and Paleoclimatology Research (53 papers), Paleontology and Stratigraphy of Fossils (39 papers) and Marine and coastal ecosystems (27 papers). Helmut Willems collaborates with scholars based in Germany, China and Netherlands. Helmut Willems's co-authors include Karin A F Zonneveld, Kai-Uwe Gräfe, Lin Ding, Qinghai Zhang, Tania Hildebrand-Habel, Αnnemiek Vink, K J Sebastian Meier, Ines Wendler, Michael Streng and Gerard J M Versteegh and has published in prestigious journals such as Earth and Planetary Science Letters, Geological Society of America Bulletin and Palaeogeography Palaeoclimatology Palaeoecology.

In The Last Decade

Helmut Willems

82 papers receiving 2.1k citations

Peers — A (Enhanced Table)

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

Name	h						Papers	Cites
Helmut Willems Germany	31	1.2k	970	943	526	482	82	2.2k
Ian C. Harding United Kingdom	23	1.2k 1.0×	616 0.6×	854 0.9×	378 0.7×	228 0.5×	57	2.0k
Robert A. Fensome Canada	21	796 0.6×	771 0.8×	830 0.9×	504 1.0×	220 0.5×	63	1.9k
Claudia Agnini Italy	25	1.9k 1.5×	619 0.6×	1.3k 1.4×	508 1.0×	479 1.0×	90	2.4k
Simonetta Monechi Italy	27	1.8k 1.5×	529 0.5×	1.3k 1.4×	412 0.8×	619 1.3×	80	2.3k
Stephen A. Schellenberg United States	16	1.3k 1.1×	631 0.7×	811 0.9×	476 0.9×	176 0.4×	26	1.8k
Graham L. Williams Canada	27	1.4k 1.1×	662 0.7×	1.3k 1.3×	246 0.5×	377 0.8×	67	2.2k
Hiroshi Nishi Japan	24	1.2k 1.0×	486 0.5×	1.1k 1.2×	384 0.7×	574 1.2×	111	2.0k
Erica M. Crouch New Zealand	19	1.4k 1.1×	474 0.5×	857 0.9×	432 0.8×	269 0.6×	35	1.9k
Noritoshi Suzuki Japan	23	622 0.5×	391 0.4×	829 0.9×	357 0.7×	399 0.8×	105	1.6k
David Bukry United States	21	1.5k 1.2×	561 0.6×	923 1.0×	493 0.9×	611 1.3×	61	2.3k

Countries citing papers authored by Helmut Willems

Since Specialization

Citations

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

Fields of papers citing papers by Helmut Willems

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Helmut Willems

This figure shows the co-authorship network connecting the top 25 collaborators of Helmut Willems. A scholar is included among the top collaborators of Helmut Willems 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 Helmut Willems. Helmut Willems is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

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20 of 20 papers shown

Zhang, Qinghai, Lin Ding, Xinming Chen, et al.. (2023). The large decline in carbonate δ238U from a PETM section at Tingri (South Tibet) was driven by local sea-level changes, not global oceanic anoxia. Earth and Planetary Science Letters. 612. 118164–118164. 8 indexed citations

Willems, Helmut, et al.. (2017). Genesis of Paleocene and Lower Eocene shallow-water nodular limestone of South Tibet (China). Carbonates and Evaporites. 34(2). 199–218. 6 indexed citations

Zhang, Qinghai, Ines Wendler, Xiaoxia Xu, Helmut Willems, & Lin Ding. (2017). Structure and magnitude of the carbon isotope excursion during the Paleocene-Eocene thermal maximum. Gondwana Research. 46. 114–123. 30 indexed citations

Li, Gang, Atsushi Matsuoka, & Helmut Willems. (2015). SEM morphological study of the clam shrimp type specimens of Eosestheria sihetunensis from the Lower Cretaceous Yixian Formation in western Liaoning, northeastern China. 30(30). 27–37. 7 indexed citations

Preto, Nereo, et al.. (2012). Onset of significant pelagic carbonate accumulation after the Carnian Pluvial Event (CPE) in the western Tethys. Facies. 59(4). 891–914. 28 indexed citations

Wendler, Ines, Helmut Willems, Kai-Uwe Gräfe, Lin Ding, & Hui Luo. (2011). Upper Cretaceous inter-hemispheric correlation between the Southern Tethys and the Boreal: chemo- and biostratigraphy and paleoclimatic reconstructions from a new section in the Tethys Himalaya, S-Tibet. Newsletters on Stratigraphy. 44(2). 137–171. 36 indexed citations

Gottschling, Marc, Susanne S. Renner, K J Sebastian Meier, Helmut Willems, & Helmut Keupp. (2008). TIMING DEEP DIVERGENCE EVENTS IN CALCAREOUS DINOFLAGELLATES¹. Journal of Phycology. 44(2). 429–438. 21 indexed citations

Li, Gang, Xiaoqiao Wan, Helmut Willems, & David J. Batten. (2007). 浙江における上部白亜紀蘭渓層からのConchostracan Genus Tenuestheriaの修正と中国東南部でのその生物層序学的重要性. Acta Geological Sinica. 81(6). 925–930. 4 indexed citations

Hollis, Christopher J., et al.. (2006). Late Quaternary Radiolarian Assemblages as Indicators for Paleoceanographic Changes North of the Subtropical Front, Offshore Eastern New Zealand, Southwest Pacific. Helmholtz-Zentrum für Polar-und Meeresforschung (Alfred-Wegener-Institut). 2006. 8 indexed citations

10.

Holzwarth, Ulrike, Oliver Esper, Karin A F Zonneveld, & Helmut Willems. (2005). Spatial Distribution of Organic-walled Dinoflagellate Cysts in Surface Sediments of the Benguela Upwelling System and Their Relationship to Environmental Parameters. AGUFM. 2005. 1 indexed citations

11.

Gottschling, Marc, et al.. (2005). Phylogeny of calcareous dinoflagellates as inferred from ITS and ribosomal sequence data. Molecular Phylogenetics and Evolution. 36(3). 444–455. 77 indexed citations

12.

Zonneveld, Karin A F, et al.. (2005). Organic-walled dinoflagellate cyst production in relation to upwelling intensity and lithogenic influx in the Cape Blanc region (off north-west Africa). Phycological Research. 53(2). 97–112. 36 indexed citations

13.

Streng, Michael, Tania Hildebrand-Habel, & Helmut Willems. (2004). Long-term evolution of calcareous dinoflagellate associations since the Late Cretaceous: comparison of a high- and a low-latitude core from the Indian Ocean.. Journal of Nannoplankton Research. 26(1). 13–45. 14 indexed citations

14.

Wendler, Ines, Karin A F Zonneveld, & Helmut Willems. (2002). Production of calcareous dinoflagellate cysts in response to monsoon forcing off Somalia: a sediment trap study. Marine Micropaleontology. 46(1-2). 1–11. 38 indexed citations

15.

Wendler, Jens E, Ines Wendler, & Helmut Willems. (2001). Orthopithonella collaris sp. nov., a new calcareous dinoflagellate cyst from the K/T boundary (Fish Clay, Stevns Klint/Denmark). Review of Palaeobotany and Palynology. 115(1-2). 69–77. 9 indexed citations

16.

Zonneveld, Karin A F, et al.. (2000). Spatial distribution of calcareous dinoflagellate cysts in surface sediments of the Atlantic Ocean between 13°N and 36°S.. Review of Palaeobotany and Palynology. 111(3-4). 197–223. 32 indexed citations

17.

Hildebrand-Habel, Tania & Helmut Willems. (2000). Distribution of calcareous dinoflagellates from the Maastrichtian to early Miocene of DSDP Site 357 (Rio Grande Rise, western South Atlantic Ocean). International Journal of Earth Sciences. 88(4). 694–707. 22 indexed citations

18.

Rühlemann, Carsten, et al.. (1999). Palaeoenvironmental information gained from calcareous dinoflagellates: the late Quaternary eastern and western tropical Atlantic Ocean in comparison. Palaeogeography Palaeoclimatology Palaeoecology. 146(1-4). 147–164. 41 indexed citations

19.

Hildebrand-Habel, Tania, et al.. (1998). Paleocene coccospheres from DSDP Leg 39, Site 356, Sao Paulo Plateau, S. Atlantic Ocean.. Journal of Nannoplankton Research. 20(1). 21–29. 1 indexed citations

20.

Willems, Helmut, et al.. (1996). Stratigraphy of the Upper Cretaceous and Lower Tertiary strata in the Tethyan Himalayas of Tibet (Tingri area, China). Geologische Rundschau. 85(4). 723–754. 3 indexed citations

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