{"id":"https://openalex.org/A5084800977","orcid":"https://orcid.org/0000-0002-2376-4578","observed_orcids":["https://orcid.org/0000-0002-2376-4578"],"display_name":"M. J. Klein","raw_author_names":["Klein, M. J.","Klein, Michael John","M J Klein","M. J. KLEIN","M. J. Klein","M. Klein","M.J. Klein","Michael J. Klein"],"full_name":"Klein, Michael John","works_count":151,"cited_by_count":869,"summary_stats":{"2yr_mean_citedness":0.0,"h_index":17,"i10_index":28},"ids":{"openalex":"https://openalex.org/A5084800977","orcid":"https://orcid.org/0000-0002-2376-4578","observed_orcids":["https://orcid.org/0000-0002-2376-4578"]},"affiliations":[{"institution":{"id":"https://openalex.org/I122411786","ror":"https://ror.org/05dxps055","display_name":"California Institute of Technology","country_code":"US","type":"education","lineage":["https://openalex.org/I122411786"]},"years":[2008,2003,2001,1995,1992,1991,1990,1986,1983,1982,1981,1980,1978,1976,1974]},{"institution":{"id":"https://openalex.org/I1334627681","ror":"https://ror.org/027k65916","display_name":"Jet Propulsion Laboratory","country_code":"US","type":"facility","lineage":["https://openalex.org/I122411786","https://openalex.org/I1334627681","https://openalex.org/I4210124779"]},"years":[2008,2003,2001,1999,1996,1995,1994,1992,1991,1990,1989,1988,1986,1985,1983,1982,1981,1980,1978,1976,1975,1974,1973]},{"institution":{"id":"https://openalex.org/I169540460","ror":"https://ror.org/01ar9e455","display_name":"The Aerospace Corporation","country_code":"US","type":"nonprofit","lineage":["https://openalex.org/I169540460"]},"years":[1981]},{"institution":{"id":"https://openalex.org/I27837315","ror":"https://ror.org/00jmfr291","display_name":"University of Michigan","country_code":"US","type":"education","lineage":["https://openalex.org/I27837315"]},"years":[1971]},{"institution":{"id":"https://openalex.org/I95457486","ror":"https://ror.org/01an7q238","display_name":"University of California, Berkeley","country_code":"US","type":"education","lineage":["https://openalex.org/I95457486"]},"years":[1981]}],"last_known_institutions":null,"topics":[{"id":"https://openalex.org/T10325","display_name":"Astro and Planetary Science","count":84,"subfield":{"id":"https://openalex.org/subfields/1912","display_name":"Space and Planetary Science"},"field":{"id":"https://openalex.org/fields/19","display_name":"Earth and Planetary Sciences"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10159","display_name":"Ionosphere and magnetosphere dynamics","count":59,"subfield":{"id":"https://openalex.org/subfields/1912","display_name":"Space and Planetary Science"},"field":{"id":"https://openalex.org/fields/19","display_name":"Earth and Planetary Sciences"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10406","display_name":"Planetary Science and Exploration","count":50,"subfield":{"id":"https://openalex.org/subfields/1912","display_name":"Space and Planetary Science"},"field":{"id":"https://openalex.org/fields/19","display_name":"Earth and Planetary Sciences"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T12450","display_name":"Radio Astronomy Observations and Technology","count":41,"subfield":{"id":"https://openalex.org/subfields/3103","display_name":"Astronomy and Astrophysics"},"field":{"id":"https://openalex.org/fields/31","display_name":"Physics and Astronomy"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10251","display_name":"Solar and Space Plasma Dynamics","count":38,"subfield":{"id":"https://openalex.org/subfields/3103","display_name":"Astronomy and Astrophysics"},"field":{"id":"https://openalex.org/fields/31","display_name":"Physics and Astronomy"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}}],"topic_share":[{"id":"https://openalex.org/T12450","display_name":"Radio Astronomy Observations and Technology","value":0.0004544,"subfield":{"id":"https://openalex.org/subfields/3103","display_name":"Astronomy and Astrophysics"},"field":{"id":"https://openalex.org/fields/31","display_name":"Physics and Astronomy"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T12788","display_name":"Space Science and Extraterrestrial Life","value":0.0002894,"subfield":{"id":"https://openalex.org/subfields/3103","display_name":"Astronomy and Astrophysics"},"field":{"id":"https://openalex.org/fields/31","display_name":"Physics and Astronomy"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10406","display_name":"Planetary Science and Exploration","value":0.0001428,"subfield":{"id":"https://openalex.org/subfields/1912","display_name":"Space and Planetary Science"},"field":{"id":"https://openalex.org/fields/19","display_name":"Earth and Planetary Sciences"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10325","display_name":"Astro and Planetary Science","value":0.000138,"subfield":{"id":"https://openalex.org/subfields/1912","display_name":"Space and Planetary Science"},"field":{"id":"https://openalex.org/fields/19","display_name":"Earth and Planetary Sciences"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10159","display_name":"Ionosphere and magnetosphere dynamics","value":0.0001292,"subfield":{"id":"https://openalex.org/subfields/1912","display_name":"Space and Planetary Science"},"field":{"id":"https://openalex.org/fields/19","display_name":"Earth and Planetary Sciences"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}}],"x_concepts":[{"id":"121332964","wikidata":"https://www.wikidata.org/wiki/Q413","display_name":"Physics","score":0.9519321322441101},{"id":"87355193","wikidata":"https://www.wikidata.org/wiki/Q411","display_name":"Astrobiology","score":0.8545030355453491},{"id":"44870925","wikidata":"https://www.wikidata.org/wiki/Q37547","display_name":"Astrophysics","score":0.7544205784797668},{"id":"1276947","wikidata":"https://www.wikidata.org/wiki/Q333","display_name":"Astronomy","score":0.6965345144271851},{"id":"120665830","wikidata":"https://www.wikidata.org/wiki/Q14620","display_name":"Optics","score":0.5442323088645935}],"counts_by_year":[{"year":1965,"works_count":2,"oa_works_count":1,"cited_by_count":0},{"year":1966,"works_count":1,"oa_works_count":0,"cited_by_count":0},{"year":1968,"works_count":1,"oa_works_count":1,"cited_by_count":0},{"year":1969,"works_count":1,"oa_works_count":0,"cited_by_count":0},{"year":1970,"works_count":2,"oa_works_count":0,"cited_by_count":0},{"year":1971,"works_count":2,"oa_works_count":1,"cited_by_count":0},{"year":1972,"works_count":3,"oa_works_count":0,"cited_by_count":0},{"year":1973,"works_count":4,"oa_works_count":0,"cited_by_count":0},{"year":1974,"works_count":5,"oa_works_count":1,"cited_by_count":0},{"year":1975,"works_count":3,"oa_works_count":0,"cited_by_count":0},{"year":1976,"works_count":4,"oa_works_count":0,"cited_by_count":0},{"year":1977,"works_count":2,"oa_works_count":0,"cited_by_count":0},{"year":1978,"works_count":4,"oa_works_count":0,"cited_by_count":0},{"year":1980,"works_count":2,"oa_works_count":0,"cited_by_count":0},{"year":1981,"works_count":5,"oa_works_count":0,"cited_by_count":0},{"year":1982,"works_count":2,"oa_works_count":0,"cited_by_count":0},{"year":1983,"works_count":5,"oa_works_count":0,"cited_by_count":0},{"year":1984,"works_count":3,"oa_works_count":1,"cited_by_count":0},{"year":1985,"works_count":4,"oa_works_count":1,"cited_by_count":0},{"year":1986,"works_count":3,"oa_works_count":0,"cited_by_count":0},{"year":1987,"works_count":3,"oa_works_count":0,"cited_by_count":0},{"year":1988,"works_count":4,"oa_works_count":1,"cited_by_count":0},{"year":1989,"works_count":6,"oa_works_count":2,"cited_by_count":0},{"year":1990,"works_count":3,"oa_works_count":0,"cited_by_count":0},{"year":1991,"works_count":6,"oa_works_count":2,"cited_by_count":0},{"year":1992,"works_count":3,"oa_works_count":0,"cited_by_count":0},{"year":1993,"works_count":7,"oa_works_count":0,"cited_by_count":0},{"year":1994,"works_count":7,"oa_works_count":0,"cited_by_count":0},{"year":1995,"works_count":6,"oa_works_count":1,"cited_by_count":0},{"year":1996,"works_count":5,"oa_works_count":0,"cited_by_count":0},{"year":1998,"works_count":3,"oa_works_count":0,"cited_by_count":0},{"year":1999,"works_count":5,"oa_works_count":0,"cited_by_count":0},{"year":2000,"works_count":1,"oa_works_count":0,"cited_by_count":0},{"year":2001,"works_count":8,"oa_works_count":0,"cited_by_count":0},{"year":2002,"works_count":5,"oa_works_count":0,"cited_by_count":0},{"year":2003,"works_count":11,"oa_works_count":0,"cited_by_count":0},{"year":2004,"works_count":5,"oa_works_count":0,"cited_by_count":0},{"year":2008,"works_count":2,"oa_works_count":0,"cited_by_count":0},{"year":2009,"works_count":1,"oa_works_count":0,"cited_by_count":0},{"year":2011,"works_count":1,"oa_works_count":0,"cited_by_count":0},{"year":2012,"works_count":0,"oa_works_count":0,"cited_by_count":10},{"year":2013,"works_count":0,"oa_works_count":0,"cited_by_count":20},{"year":2014,"works_count":0,"oa_works_count":0,"cited_by_count":11},{"year":2015,"works_count":0,"oa_works_count":0,"cited_by_count":12},{"year":2016,"works_count":0,"oa_works_count":0,"cited_by_count":22},{"year":2017,"works_count":0,"oa_works_count":0,"cited_by_count":14},{"year":2018,"works_count":0,"oa_works_count":0,"cited_by_count":26},{"year":2019,"works_count":0,"oa_works_count":0,"cited_by_count":40},{"year":2020,"works_count":0,"oa_works_count":0,"cited_by_count":17},{"year":2021,"works_count":0,"oa_works_count":0,"cited_by_count":10},{"year":2022,"works_count":0,"oa_works_count":0,"cited_by_count":8},{"year":2023,"works_count":0,"oa_works_count":0,"cited_by_count":12},{"year":2024,"works_count":1,"oa_works_count":1,"cited_by_count":8},{"year":2025,"works_count":0,"oa_works_count":0,"cited_by_count":8},{"year":2026,"works_count":0,"oa_works_count":0,"cited_by_count":7}],"display_name_alternatives":["Klein, M. J.","Klein, Michael John","M J Klein","M. J. KLEIN","M. J. Klein","M. Klein","M.J. Klein","Michael J. Klein"],"block_key":"m klein","works_api_url":"https://api.openalex.org/works?filter=author.id:A5084800977","updated_date":"2026-11-07T12:08:38","created_date":"2016-06-24T00:00:00"}