T. Nygrén

1.4k total citations
85 papers, 1.1k citations indexed

About

T. Nygrén is a scholar working on Astronomy and Astrophysics, Geophysics and Aerospace Engineering. According to data from OpenAlex, T. Nygrén has authored 85 papers receiving a total of 1.1k indexed citations (citations by other indexed papers that have themselves been cited), including 62 papers in Astronomy and Astrophysics, 36 papers in Geophysics and 30 papers in Aerospace Engineering. Recurrent topics in T. Nygrén's work include Ionosphere and magnetosphere dynamics (62 papers), Earthquake Detection and Analysis (28 papers) and Solar and Space Plasma Dynamics (22 papers). T. Nygrén is often cited by papers focused on Ionosphere and magnetosphere dynamics (62 papers), Earthquake Detection and Analysis (28 papers) and Solar and Space Plasma Dynamics (22 papers). T. Nygrén collaborates with scholars based in Finland, Romania and Russia. T. Nygrén's co-authors include T. Turunen, L. Jalonen, A. Huuskonen, Anita Aikio, Markku Lehtinen, Mirela Voiculescu, J. Oksman, E. D. Tereshchenko, Lei Cai and B. Z. Khudukon and has published in prestigious journals such as Physical Review Letters, Journal of Geophysical Research Atmospheres and Proceedings of the IEEE.

In The Last Decade

T. Nygrén

82 papers receiving 1.0k citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
T. Nygrén Finland 20 976 468 457 249 163 85 1.1k
В. Е. Куницын Russia 23 1.1k 1.1× 779 1.7× 390 0.9× 265 1.1× 215 1.3× 79 1.3k
J. A. Secan United States 14 850 0.9× 451 1.0× 607 1.3× 141 0.6× 287 1.8× 38 1.0k
E. J. Fremouw United States 17 1.1k 1.1× 485 1.0× 767 1.7× 168 0.7× 319 2.0× 61 1.3k
J. L. Semeter United States 22 1.1k 1.1× 475 1.0× 338 0.7× 228 0.9× 108 0.7× 76 1.2k
D. B. Muldrew Canada 20 1.1k 1.2× 489 1.0× 278 0.6× 248 1.0× 92 0.6× 52 1.2k
E. D. Tereshchenko Russia 17 746 0.8× 591 1.3× 203 0.4× 275 1.1× 129 0.8× 82 932
G. S. Bust United States 20 1.4k 1.5× 744 1.6× 851 1.9× 347 1.4× 315 1.9× 80 1.5k
Juha Vierinen Norway 21 1.4k 1.5× 637 1.4× 539 1.2× 243 1.0× 215 1.3× 129 1.7k
P. G. Richards United States 20 1.3k 1.3× 541 1.2× 454 1.0× 259 1.0× 121 0.7× 49 1.4k
J. Noto United States 14 781 0.8× 278 0.6× 202 0.4× 166 0.7× 143 0.9× 53 941

Countries citing papers authored by T. Nygrén

Since Specialization
Citations

This map shows the geographic impact of T. Nygrén'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 T. Nygrén with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites T. Nygrén more than expected).

Fields of papers citing papers by T. Nygrén

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of T. Nygrén

This figure shows the co-authorship network connecting the top 25 collaborators of T. Nygrén. A scholar is included among the top collaborators of T. Nygrén 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 T. Nygrén. T. Nygrén 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.
Cai, Lei, Anita Aikio, & T. Nygrén. (2014). Solar wind effect on Joule heating in the high‐latitude ionosphere. Journal of Geophysical Research Space Physics. 119(12). 13 indexed citations
2.
Nygrén, T., et al.. (2011). Electric fields and neutral winds from monostatic incoherent scatter measurements by means of stochastic inversion. Journal of Geophysical Research Atmospheres. 116(A5). 25 indexed citations
3.
Virtanen, Ilkka, et al.. (2008). Lag profile inversion method for EISCAT data analysis. Annales Geophysicae. 26(3). 571–581. 23 indexed citations
4.
Tereshchenko, E. D., et al.. (2000). Irregular structures of the F layer at high latitudes during ionospheric heating. Annales Geophysicae. 18(9). 1197–1209. 11 indexed citations
5.
Nygrén, T., et al.. (1997). Mapping the Ionospheric F Region by Means of Satellite Tomography. Acta Geodaetica et Geophysica Hungarica. 32(3-4). 395–405. 2 indexed citations
6.
Nygrén, T., et al.. (1997). Long alternating codes: 1. Search by playing dominoes. Radio Science. 32(1). 1–8. 6 indexed citations
7.
Nygrén, T.. (1996). Studies of the E-region ion-neutral collision frequency using the EISCAT incoherent scatter radar. Advances in Space Research. 18(3). 79–82. 8 indexed citations
8.
Eglitis, P., T. R. Robinson, I. W. McCrea, et al.. (1995). Doppler spectrum statistics obtained from three different-frequency radar auroral experiments. Annales Geophysicae. 13(1). 56–65. 15 indexed citations
9.
Tereshchenko, E. D., et al.. (1993). Comparison of ionospheric total electron content measured using the difference Doppler and incoherent scatter methods. Annales Geophysicae. 11(1). 10–16. 3 indexed citations
10.
Lanchester, B. S., T. Nygrén, M. J. Jarvis, & Roger Edwards. (1993). Gravity wave parameters measured with EISCAT and Dynasonde. Annales Geophysicae. 11(10). 925–936. 25 indexed citations
11.
Turunen, T., T. Nygrén, & A. Huuskonen. (1993). Nocturnal high-latitude E-region in winter during extremely quiet conditions. Journal of Atmospheric and Terrestrial Physics. 55(4-5). 783–795. 19 indexed citations
12.
Nygrén, T., K. Kaila, A. Huuskonen, & T. Turunen. (1992). Determination of E region effective recombination coefficient using impulsive precipitation events. Geophysical Research Letters. 19(5). 445–448. 13 indexed citations
13.
McCrea, I. W., K. Schlegel, T. Nygrén, & T. B. Jones. (1991). COSCAT, a new auroral radar facility on 930 MHz-system description and first results. Annales Geophysicae. 9(7). 461–469. 8 indexed citations
14.
Nygrén, T.. (1990). Vertical plasma transport due to electric fields and neutral winds in the auroral ionosphere. Advances in Space Research. 10(6). 297–305. 4 indexed citations
15.
Nygrén, T.. (1989). Studies of sporadic E-layer using the EISCAT incoherent scatter radar. Advances in Space Research. 9(5). 73–81. 4 indexed citations
16.
Nygrén, T., L. Jalonen, A. Huuskonen, & T. Turunen. (1984). Density profiles of sporadic E-layers containing two metal ion species. Journal of Atmospheric and Terrestrial Physics. 46(10). 885–893. 15 indexed citations
17.
Nygrén, T., et al.. (1981). Anomalous multiple traces below fE in high gain ionograms recorded at Sodankylä. Journal of Atmospheric and Terrestrial Physics. 43(2). 151–156. 1 indexed citations
18.
Turunen, T., T. Nygrén, & L. Jalonen. (1980). Observations of the reflection coefficient of the sporadic E-layer at high latitudes. Journal of Atmospheric and Terrestrial Physics. 42(2). 147–154. 6 indexed citations
19.
Turunen, T., T. Nygrén, & L. Jalonen. (1979). Observations of the reflection coefficient of the sporadic E-layer at high latitudes. 1 indexed citations
20.
Nygrén, T., et al.. (1974). Sensitivity of Doppler RADAR with Sell-Detecting Diode Oscillators. IEEE Transactions on Microwave Theory and Techniques. 22(5). 494–498. 10 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.

Explore authors with similar magnitude of impact

Breakdown of academic impact, for papers by В. Е. Куницын Breakdown of academic impact, for papers by J. A. Secan Breakdown of academic impact, for papers by E. J. Fremouw Breakdown of academic impact, for papers by J. L. Semeter Breakdown of academic impact, for papers by D. B. Muldrew Breakdown of academic impact, for papers by E. D. Tereshchenko Breakdown of academic impact, for papers by G. S. Bust Breakdown of academic impact, for papers by Juha Vierinen Breakdown of academic impact, for papers by P. G. Richards Breakdown of academic impact, for papers by J. Noto
Rankless by CCL
2026