{"id":"https://openalex.org/W3084136353","doi":"https://doi.org/10.5194/egusphere-egu2020-4660","title":"Recurrence quantification analysis of the ~620 kyr record of climate change from the Chew Bahir basin, southern Ethiopia","display_name":"Recurrence quantification analysis of the ~620 kyr record of climate change from the Chew Bahir basin, southern Ethiopia","publication_year":2020,"publication_date":"2020-03-09","ids":{"openalex":"https://openalex.org/W3084136353","doi":"https://doi.org/10.5194/egusphere-egu2020-4660","mag":"3084136353"},"language":"en","primary_location":{"id":"doi:10.5194/egusphere-egu2020-4660","doi":"https://doi.org/10.5194/egusphere-egu2020-4660","is_oa":true,"landing_page_url":"https://doi.org/10.5194/egusphere-egu2020-4660","pdf_url":null,"source":null,"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":null,"raw_type":"posted-content"},"volume":null,"type":"conference-abstract","is_traditional":false,"indexed_in":["crossref"],"open_access":{"is_oa":true,"oa_status":"gold","oa_url":"https://doi.org/10.5194/egusphere-egu2020-4660","any_repository_has_fulltext":null},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5047832704","display_name":"Martin H. Trauth","orcid":"https://orcid.org/0000-0001-5164-7267","observed_orcids":["https://orcid.org/0000-0001-5164-7267"]},"institutions":[{"id":"https://openalex.org/I176453806","display_name":"University of Potsdam","ror":"https://ror.org/03bnmw459","country_code":"DE","type":"education","lineage":["https://openalex.org/I176453806"]}],"countries":["DE"],"is_corresponding":true,"raw_author_name":"Martin H. Trauth","raw_affiliation_strings":["University of Potsdam, Institute for Geosciences, Potsdam, Germany (trauth@geo.uni-potsdam.de)"],"raw_orcid":"https://orcid.org/0000-0001-5164-7267","affiliations":[{"raw_affiliation_string":"University of Potsdam, Institute for Geosciences, Potsdam, Germany (trauth@geo.uni-potsdam.de)","institution_ids":["https://openalex.org/I176453806"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5089338975","display_name":"Asfawossen Asrat","orcid":"https://orcid.org/0000-0002-6312-8082","observed_orcids":["https://orcid.org/0000-0002-6312-8082"]},"institutions":[{"id":"https://openalex.org/I4537092","display_name":"Addis Ababa University","ror":"https://ror.org/038b8e254","country_code":"ET","type":"education","lineage":["https://openalex.org/I4537092"]}],"countries":["ET"],"is_corresponding":false,"raw_author_name":"Asfawossen Asrat","raw_affiliation_strings":["Addis Ababa University, School of Earth Sciences, Addis Ababa, Ethiopia"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Addis Ababa University, School of Earth Sciences, Addis Ababa, Ethiopia","institution_ids":["https://openalex.org/I4537092"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5052236568","display_name":"Andrew S. Cohen","orcid":"https://orcid.org/0000-0001-9995-9489","observed_orcids":["https://orcid.org/0000-0001-9995-9489"]},"institutions":[{"id":"https://openalex.org/I138006243","display_name":"University of Arizona","ror":"https://ror.org/03m2x1q45","country_code":"US","type":"education","lineage":["https://openalex.org/I138006243"]}],"countries":["US"],"is_corresponding":true,"raw_author_name":"Andrew S. Cohen","raw_affiliation_strings":["University of Arizona, Department of Geosciences, Tucson, USA"],"raw_orcid":"https://orcid.org/0000-0001-9995-9489","affiliations":[{"raw_affiliation_string":"University of Arizona, Department of Geosciences, Tucson, USA","institution_ids":["https://openalex.org/I138006243"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5050243365","display_name":"Walter Duesing","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I176453806","display_name":"University of Potsdam","ror":"https://ror.org/03bnmw459","country_code":"DE","type":"education","lineage":["https://openalex.org/I176453806"]}],"countries":["DE"],"is_corresponding":false,"raw_author_name":"Walter Duesing","raw_affiliation_strings":["University of Potsdam, Institute for Geosciences, Potsdam, Germany (trauth@geo.uni-potsdam.de)"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"University of Potsdam, Institute for Geosciences, Potsdam, Germany (trauth@geo.uni-potsdam.de)","institution_ids":["https://openalex.org/I176453806"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5050648072","display_name":"Verena Foerster","orcid":"https://orcid.org/0000-0002-3480-5769","observed_orcids":["https://orcid.org/0000-0002-3480-5769"]},"institutions":[{"id":"https://openalex.org/I180923762","display_name":"University of Cologne","ror":"https://ror.org/00rcxh774","country_code":"DE","type":"education","lineage":["https://openalex.org/I180923762"]}],"countries":["DE"],"is_corresponding":true,"raw_author_name":"Verena Foerster","raw_affiliation_strings":["University of Cologne, Institute of Geography Education, Cologne, Germany"],"raw_orcid":"https://orcid.org/0000-0002-3480-5769","affiliations":[{"raw_affiliation_string":"University of Cologne, Institute of Geography Education, Cologne, Germany","institution_ids":["https://openalex.org/I180923762"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5026270249","display_name":"Stefanie Kaboth\u2010Bahr","orcid":"https://orcid.org/0000-0002-4449-2938","observed_orcids":["https://orcid.org/0000-0002-4449-2938"]},"institutions":[{"id":"https://openalex.org/I176453806","display_name":"University of Potsdam","ror":"https://ror.org/03bnmw459","country_code":"DE","type":"education","lineage":["https://openalex.org/I176453806"]}],"countries":["DE"],"is_corresponding":true,"raw_author_name":"Stefanie Kaboth-Bahr","raw_affiliation_strings":["University of Potsdam, Institute for Geosciences, Potsdam, Germany (trauth@geo.uni-potsdam.de)"],"raw_orcid":"https://orcid.org/0000-0002-4449-2938","affiliations":[{"raw_affiliation_string":"University of Potsdam, Institute for Geosciences, Potsdam, Germany (trauth@geo.uni-potsdam.de)","institution_ids":["https://openalex.org/I176453806"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5109577348","display_name":"K. Hauke Kraemer","orcid":"https://orcid.org/0000-0002-9943-5391","observed_orcids":["https://orcid.org/0000-0002-9943-5391"]},"institutions":[{"id":"https://openalex.org/I176453806","display_name":"University of Potsdam","ror":"https://ror.org/03bnmw459","country_code":"DE","type":"education","lineage":["https://openalex.org/I176453806"]},{"id":"https://openalex.org/I60200437","display_name":"Potsdam Institute for Climate Impact Research","ror":"https://ror.org/03e8s1d88","country_code":"DE","type":"facility","lineage":["https://openalex.org/I315704651","https://openalex.org/I60200437"]}],"countries":["DE"],"is_corresponding":false,"raw_author_name":"Hauke Kraemer","raw_affiliation_strings":["Potsdam Institute for Climate Impact Research, Potsdam, Germany","University of Potsdam, Institute for Geosciences, Potsdam, Germany (trauth@geo.uni-potsdam.de)"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Potsdam Institute for Climate Impact Research, Potsdam, Germany","institution_ids":["https://openalex.org/I60200437"]},{"raw_affiliation_string":"University of Potsdam, Institute for Geosciences, Potsdam, Germany (trauth@geo.uni-potsdam.de)","institution_ids":["https://openalex.org/I176453806"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5072717686","display_name":"Henry F. Lamb","orcid":"https://orcid.org/0000-0003-0025-0766","observed_orcids":["https://orcid.org/0000-0003-0025-0766"]},"institutions":[{"id":"https://openalex.org/I16038530","display_name":"Aberystwyth University","ror":"https://ror.org/015m2p889","country_code":"GB","type":"education","lineage":["https://openalex.org/I16038530"]}],"countries":["GB"],"is_corresponding":false,"raw_author_name":"Henry Lamb","raw_affiliation_strings":["Aberystwyth University, Department of Geography and Earth Sciences, Aberystwyth, UK"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Aberystwyth University, Department of Geography and Earth Sciences, Aberystwyth, UK","institution_ids":["https://openalex.org/I16038530"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5008750181","display_name":"Norbert Marwan","orcid":"https://orcid.org/0000-0003-1437-7039","observed_orcids":["https://orcid.org/0000-0003-1437-7039"]},"institutions":[{"id":"https://openalex.org/I60200437","display_name":"Potsdam Institute for Climate Impact Research","ror":"https://ror.org/03e8s1d88","country_code":"DE","type":"facility","lineage":["https://openalex.org/I315704651","https://openalex.org/I60200437"]}],"countries":["DE"],"is_corresponding":true,"raw_author_name":"Norbert Marwan","raw_affiliation_strings":["Potsdam Institute for Climate Impact Research, Potsdam, Germany"],"raw_orcid":"https://orcid.org/0000-0003-1437-7039","affiliations":[{"raw_affiliation_string":"Potsdam Institute for Climate Impact Research, Potsdam, Germany","institution_ids":["https://openalex.org/I60200437"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5008936320","display_name":"Mark Andrew Maslin","orcid":"https://orcid.org/0000-0001-9957-3463","observed_orcids":["https://orcid.org/0000-0001-9957-3463"]},"institutions":[{"id":"https://openalex.org/I45129253","display_name":"University College London","ror":"https://ror.org/02jx3x895","country_code":"GB","type":"education","lineage":["https://openalex.org/I124357947","https://openalex.org/I45129253"]}],"countries":["GB"],"is_corresponding":false,"raw_author_name":"Mark A. Maslin","raw_affiliation_strings":["Department of Geography, University College London, London, UK"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Department of Geography, University College London, London, UK","institution_ids":["https://openalex.org/I45129253"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5109182542","display_name":"Frank Sch\u00e4bitz","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I180923762","display_name":"University of Cologne","ror":"https://ror.org/00rcxh774","country_code":"DE","type":"education","lineage":["https://openalex.org/I180923762"]}],"countries":["DE"],"is_corresponding":false,"raw_author_name":"Frank Schaebitz","raw_affiliation_strings":["University of Cologne, Institute of Geography Education, Cologne, Germany"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"University of Cologne, Institute of Geography Education, Cologne, Germany","institution_ids":["https://openalex.org/I180923762"]}]}],"institutions":[],"countries_distinct_count":4,"institutions_distinct_count":7,"corresponding_author_ids":["https://openalex.org/A5008750181","https://openalex.org/A5026270249","https://openalex.org/A5047832704","https://openalex.org/A5050648072","https://openalex.org/A5052236568"],"corresponding_institution_ids":["https://openalex.org/I138006243","https://openalex.org/I176453806","https://openalex.org/I180923762","https://openalex.org/I60200437"],"apc_list":null,"apc_paid":null,"fwci":null,"has_fulltext":false,"cited_by_count":5,"citation_normalized_percentile":null,"cited_by_percentile_year":null,"biblio":{"volume":null,"issue":null,"first_page":null,"last_page":null},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T10017","display_name":"Geology and Paleoclimatology Research","score":0.986299991607666,"subfield":{"id":"https://openalex.org/subfields/1902","display_name":"Atmospheric 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"}},"topics":[{"id":"https://openalex.org/T10017","display_name":"Geology and Paleoclimatology Research","score":0.986299991607666,"subfield":{"id":"https://openalex.org/subfields/1902","display_name":"Atmospheric 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/T10029","display_name":"Climate variability and models","score":0.004000000189989805,"subfield":{"id":"https://openalex.org/subfields/2306","display_name":"Global and Planetary Change"},"field":{"id":"https://openalex.org/fields/23","display_name":"Environmental Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T13377","display_name":"Ecosystem dynamics and resilience","score":0.0035000001080334187,"subfield":{"id":"https://openalex.org/subfields/2306","display_name":"Global and Planetary Change"},"field":{"id":"https://openalex.org/fields/23","display_name":"Environmental Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}}],"keywords":[{"id":"https://openalex.org/keywords/recurrence-quantification-analysis","display_name":"recurrence quantification analysis","score":0.828000009059906},{"id":"https://openalex.org/keywords/recurrence-plots","display_name":"recurrence plots","score":0.8560000061988831},{"id":"https://openalex.org/keywords/quaternary-climate-variability","display_name":"Quaternary climate variability","score":0.8230000138282776},{"id":"https://openalex.org/keywords/paleoclimate","display_name":"paleoclimate","score":0.7289999723434448},{"id":"https://openalex.org/keywords/wet-dry-cycles","display_name":"wetting-drying cycles","score":0.5950000286102295},{"id":"https://openalex.org/keywords/extreme-climate-events","display_name":"climate extremes","score":0.5820000171661377},{"id":"https://openalex.org/keywords/orbital-forcing","display_name":"orbital forcing","score":0.8560000061988831},{"id":"https://openalex.org/keywords/precessional-forcing","display_name":"precessional forcing","score":0.8090000152587891},{"id":"https://openalex.org/keywords/eccentricity","display_name":"eccentricity","score":0.734000027179718},{"id":"https://openalex.org/keywords/eastern-mediterranean","display_name":"Eastern Mediterranean","score":0.734000027179718},{"id":"https://openalex.org/keywords/paleoceanography","display_name":"paleoceanography","score":0.5640000104904175},{"id":"https://openalex.org/keywords/sediment-core","display_name":"sediment core","score":0.3230000138282776}],"concepts":[{"id":"https://openalex.org/C49204034","wikidata":"https://www.wikidata.org/wiki/Q52139","display_name":"Climatology","level":1,"score":0.656987190246582},{"id":"https://openalex.org/C109007969","wikidata":"https://www.wikidata.org/wiki/Q749565","display_name":"Structural basin","level":2,"score":0.6416491270065308},{"id":"https://openalex.org/C4646841","wikidata":"https://www.wikidata.org/wiki/Q13996","display_name":"Mediterranean climate","level":2,"score":0.6312747001647949},{"id":"https://openalex.org/C132651083","wikidata":"https://www.wikidata.org/wiki/Q7942","display_name":"Climate change","level":2,"score":0.5853697061538696},{"id":"https://openalex.org/C2776067047","wikidata":"https://www.wikidata.org/wiki/Q72499","display_name":"Mediterranean Basin","level":3,"score":0.5369009971618652},{"id":"https://openalex.org/C122523270","wikidata":"https://www.wikidata.org/wiki/Q34027","display_name":"Latitude","level":2,"score":0.4555888772010803},{"id":"https://openalex.org/C100970517","wikidata":"https://www.wikidata.org/wiki/Q52107","display_name":"Physical geography","level":1,"score":0.423709511756897},{"id":"https://openalex.org/C39432304","wikidata":"https://www.wikidata.org/wiki/Q188847","display_name":"Environmental science","level":0,"score":0.418739378452301},{"id":"https://openalex.org/C127313418","wikidata":"https://www.wikidata.org/wiki/Q1069","display_name":"Geology","level":0,"score":0.35509103536605835},{"id":"https://openalex.org/C205649164","wikidata":"https://www.wikidata.org/wiki/Q1071","display_name":"Geography","level":0,"score":0.32132044434547424},{"id":"https://openalex.org/C111368507","wikidata":"https://www.wikidata.org/wiki/Q43518","display_name":"Oceanography","level":1,"score":0.21163079142570496},{"id":"https://openalex.org/C114793014","wikidata":"https://www.wikidata.org/wiki/Q52109","display_name":"Geomorphology","level":1,"score":0.08993342518806458},{"id":"https://openalex.org/C166957645","wikidata":"https://www.wikidata.org/wiki/Q23498","display_name":"Archaeology","level":1,"score":0.0},{"id":"https://openalex.org/C13280743","wikidata":"https://www.wikidata.org/wiki/Q131089","display_name":"Geodesy","level":1,"score":0.0}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.5194/egusphere-egu2020-4660","doi":"https://doi.org/10.5194/egusphere-egu2020-4660","is_oa":true,"landing_page_url":"https://doi.org/10.5194/egusphere-egu2020-4660","pdf_url":null,"source":null,"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":null,"raw_type":"posted-content"}],"best_oa_location":{"id":"doi:10.5194/egusphere-egu2020-4660","doi":"https://doi.org/10.5194/egusphere-egu2020-4660","is_oa":true,"landing_page_url":"https://doi.org/10.5194/egusphere-egu2020-4660","pdf_url":null,"source":null,"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":null,"raw_type":"posted-content"},"sustainable_development_goals":[{"id":"https://metadata.un.org/sdg/13","display_name":"Climate action","score":0.685699999332428}],"study_designs":[],"awards":[],"funders":[],"has_content":{"pdf":false,"grobid_xml":false},"content_urls":null,"referenced_works_count":0,"referenced_works":[],"related_works":["https://openalex.org/W3171269641","https://openalex.org/W2914653311","https://openalex.org/W3094963688","https://openalex.org/W3094222071","https://openalex.org/W1890539975","https://openalex.org/W3042371689","https://openalex.org/W2030394002","https://openalex.org/W2008870423","https://openalex.org/W2808080536","https://openalex.org/W3087163481"],"abstract_inverted_index":{"The":[0,73,127,252],"Chew":[1,30,58],"Bahir":[2,31,59],"Drilling":[3],"Project":[4],"(CBDP)":[5],"aims":[6],"to":[7,49,93,184,226,244],"test":[8],"possible":[9],"linkages":[10],"between":[11,122,169],"climate":[12],"and":[13,55,60,86,124,171,173,239,257,271,273],"evolution":[14],"in":[15,28,57,99,149,182,206],"Africa":[16],"through":[17],"the":[18,29,64,70,94,100,150,201,207,216,233,266,280],"analysis":[19,47],"of":[20,53,76,83,88,130,152,155,162,203,212,232,255,268,282],"sediment":[21],"cores":[22],"that":[23],"record":[24],"Quaternary":[25],"environmental":[26],"changes":[27],"basin.":[32],"In":[33,91],"this":[34,89,160],"statistical":[35],"project":[36],"we":[37],"used":[38],"recurrence":[39,45],"plots":[40],"(PRs)":[41],"together":[42],"with":[43,63,81,119,146,215,229,248],"a":[44,177,246,261],"quantification":[46],"(RQA)":[48],"distinguish":[50],"two":[51],"types":[52,254],"variability":[54,77,131,163,198,224,256],"transitions":[56,121,168,191,258],"compare":[61],"them":[62],"ODP":[65],"967":[66],"wetness":[67],"index":[68],"from":[69],"eastern":[71,275],"Mediterranean.":[72],"first":[74],"type":[75,129,156,161,187,222],"are":[78,165],"slow":[79],"variations":[80,145],"cycles":[82],"~20":[84],"kyr":[85],"subharmonics":[87],"cycle.":[90],"addition":[92],"these":[95],"cyclical":[96],"wet-dry":[97],"fluctuations":[98],"area,":[101],"extreme":[102,219],"events":[103],"often":[104],"occur,":[105],"i.e.":[106],"short":[107],"wet":[108,123],"or":[109,116,180],"dry":[110,125,170],"episodes,":[111],"lasting":[112,192],"for":[113],"several":[114,193],"centuries":[115],"even":[117],"millennia,":[118],"rapid":[120],"episodes.":[126],"second":[128],"is":[132],"characterized":[133],"by":[134],"relatively":[135],"low":[136],"variation":[137],"on":[138,265],"orbital":[139],"time":[140],"scales,":[141],"but":[142],"significant":[143],"century-to-millennium-scale":[144],"increasing":[147],"frequency":[148],"course":[151],"an":[153],"episode":[154],"2":[157,223],"variability.":[158],"Within":[159],"there":[164,240],"extremely":[166],"fast":[167],"wet,":[172],"vice":[174],"versa,":[175],"within":[176,186],"few":[178],"decades":[179],"years,":[181],"contrast":[183],"those":[185],"1":[188,197],"which":[189],"have":[190],"hundred":[194],"years.":[195],"Type":[196],"probably":[199],"reflects":[200],"influence":[202,264],"precessional":[204],"forcing":[205],"lower":[208],"latitudes":[209],"at":[210],"times":[211],"increased":[213],"eccentricity,":[214],"tendency":[217],"towards":[218],"events,":[220],"whereas":[221],"seems":[225],"be":[227,245],"linked":[228],"minimum":[230],"values":[231],"long":[234],"(400":[235],"kyr)":[236],"eccentricity":[237],"cycle,":[238],"does":[241],"not":[242],"seem":[243],"link":[247],"atmospheric":[249],"CO2":[250],"levels.":[251],"different":[253,263],"certainly":[259],"had":[260],"completely":[262],"availability":[267],"water,":[269],"food":[270],"shelter,":[272],"hence":[274],"Africa\u2019s":[276],"biotic":[277],"environment,":[278],"including":[279],"habitat":[281],"H.":[283],"sapiens.":[284]},"counts_by_year":[{"year":2025,"cited_by_count":1},{"year":2024,"cited_by_count":1},{"year":2023,"cited_by_count":1},{"year":2022,"cited_by_count":2}],"updated_date":"2026-11-09T13:22:03.289127","created_date":"2020-09-14T00:00:00"}