{"id":"https://openalex.org/W7221487232","doi":null,"title":"Characterization of Natural Regions in Guinea Using ATOVS Brightness Temperature Data Multi-Channel Microwave Analysis at 19, 23, 37, 85 and 92 GHz","display_name":"Characterization of Natural Regions in Guinea Using ATOVS Brightness Temperature Data Multi-Channel Microwave Analysis at 19, 23, 37, 85 and 92 GHz","publication_year":2026,"publication_date":"2026-04-03","ids":{"openalex":"https://openalex.org/W7221487232"},"language":"en","primary_location":{"id":"pmh:oai:HAL:hal-05692304v1","doi":null,"is_oa":true,"landing_page_url":"https://hal.science/hal-05692304v1","pdf_url":null,"source":{"id":"https://openalex.org/S4306402512","display_name":"HAL","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"listed_in":[],"host_organization":"https://openalex.org/I4405252976","host_organization_name":"Centre pour la Communication Scientifique Directe","host_organization_lineage":["https://openalex.org/I4405252976"],"host_organization_lineage_names":[],"type":"repository"},"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"2026","raw_type":"info:eu-repo/semantics/preprint"},"volume":null,"type":"preprint","is_traditional":true,"indexed_in":[],"open_access":{"is_oa":true,"oa_status":"green","oa_url":"https://hal.science/hal-05692304v1","any_repository_has_fulltext":true},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5011952186","display_name":"Younousse Biaye","orcid":"https://orcid.org/0000-0001-8696-4385","observed_orcids":["https://orcid.org/0000-0001-8696-4385"]},"institutions":[{"id":"https://openalex.org/I112713213","display_name":"Universit\u00e9 Gaston Berger","ror":"https://ror.org/01jp0tk64","country_code":"SN","type":"education","lineage":["https://openalex.org/I112713213"]}],"countries":["SN"],"is_corresponding":false,"raw_author_name":"Biaye, Younousse","raw_affiliation_strings":["LSAO - Universit\u00e9 Gaston Berger - Laboratoire des Sciences de l\u2019Atmosph\u00e8re et des Oc\u00e9ans [S\u00e9n\u00e9gal] (Route de Ngall\u00e8le, B.P. 234 Saint-Louis - Senegal)"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"LSAO - Universit\u00e9 Gaston Berger - Laboratoire des Sciences de l\u2019Atmosph\u00e8re et des Oc\u00e9ans [S\u00e9n\u00e9gal] (Route de Ngall\u00e8le, B.P. 234 Saint-Louis - Senegal)","institution_ids":["https://openalex.org/I112713213"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5158405640","display_name":"Hamidou Tidiane Tidiane","orcid":null,"observed_orcids":[]},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"Tidiane, Hamidou Tidiane","raw_affiliation_strings":["CEREMAC - CEREMAC Conakry, Guin\u00e9e (Guinea)"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"CEREMAC - CEREMAC Conakry, Guin\u00e9e (Guinea)","institution_ids":[]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5158349264","display_name":"Adoum Mahamat Mahamat","orcid":null,"observed_orcids":[]},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"Mahamat, Adoum Mahamat","raw_affiliation_strings":["ISC - 3Institut of Science of Climatology, Tchad (Chad)"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"ISC - 3Institut of Science of Climatology, Tchad (Chad)","institution_ids":[]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5158286010","display_name":"Abdoulaye Bouya Bouya","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I112713213","display_name":"Universit\u00e9 Gaston Berger","ror":"https://ror.org/01jp0tk64","country_code":"SN","type":"education","lineage":["https://openalex.org/I112713213"]}],"countries":["SN"],"is_corresponding":false,"raw_author_name":"Bouya, Abdoulaye Bouya","raw_affiliation_strings":["LSAO-MED - LSAOMED, Universit\u00e9 Gaston Berger de Saint Louis, S\u00e9n\u00e9gal) (Senegal)"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"LSAO-MED - LSAOMED, Universit\u00e9 Gaston Berger de Saint Louis, S\u00e9n\u00e9gal) (Senegal)","institution_ids":["https://openalex.org/I112713213"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5158328099","display_name":"Mamadou Ndiaye","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I112713213","display_name":"Universit\u00e9 Gaston Berger","ror":"https://ror.org/01jp0tk64","country_code":"SN","type":"education","lineage":["https://openalex.org/I112713213"]}],"countries":["SN"],"is_corresponding":false,"raw_author_name":"Ndiaye, Mamadou","raw_affiliation_strings":["LSAO-MED - LSAOMED, Universit\u00e9 Gaston Berger de Saint Louis, S\u00e9n\u00e9gal) (Senegal)"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"LSAO-MED - LSAOMED, Universit\u00e9 Gaston Berger de Saint Louis, S\u00e9n\u00e9gal) (Senegal)","institution_ids":["https://openalex.org/I112713213"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5158346511","display_name":"Abdou Karim Farota","orcid":null,"observed_orcids":[]},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"Karim Farota, Abdou","raw_affiliation_strings":[],"raw_orcid":null,"affiliations":[]},{"author_position":"last","author":{"id":"https://openalex.org/A5085017984","display_name":"Bouya Diop","orcid":"https://orcid.org/0000-0003-2710-059X","observed_orcids":["https://orcid.org/0000-0003-2710-059X"]},"institutions":[{"id":"https://openalex.org/I112713213","display_name":"Universit\u00e9 Gaston Berger","ror":"https://ror.org/01jp0tk64","country_code":"SN","type":"education","lineage":["https://openalex.org/I112713213"]}],"countries":["SN"],"is_corresponding":false,"raw_author_name":"Diop, Bouya","raw_affiliation_strings":["CEREMAC - CEREMAC Conakry, Guin\u00e9e (Guinea)","UGB - Universit\u00e9 Gaston Berger de Saint-Louis S\u00e9n\u00e9gal (Route de Ngall\u00e8le, B.P. 234 Saint-Louis - Senegal)"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"CEREMAC - CEREMAC Conakry, Guin\u00e9e (Guinea)","institution_ids":[]},{"raw_affiliation_string":"UGB - Universit\u00e9 Gaston Berger de Saint-Louis S\u00e9n\u00e9gal (Route de Ngall\u00e8le, B.P. 234 Saint-Louis - Senegal)","institution_ids":["https://openalex.org/I112713213"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":1,"corresponding_author_ids":[],"corresponding_institution_ids":[],"apc_list":null,"apc_paid":null,"fwci":null,"has_fulltext":false,"cited_by_count":0,"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/T11312","display_name":"Soil Moisture and Remote Sensing","score":0.98580002784729,"subfield":{"id":"https://openalex.org/subfields/2305","display_name":"Environmental Engineering"},"field":{"id":"https://openalex.org/fields/23","display_name":"Environmental Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},"topics":[{"id":"https://openalex.org/T11312","display_name":"Soil Moisture and Remote Sensing","score":0.98580002784729,"subfield":{"id":"https://openalex.org/subfields/2305","display_name":"Environmental Engineering"},"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/T10347","display_name":"Atmospheric aerosols and clouds","score":0.0019000000320374966,"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/T12019","display_name":"Calibration and Measurement Techniques","score":0.0017999999690800905,"subfield":{"id":"https://openalex.org/subfields/2202","display_name":"Aerospace Engineering"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}}],"keywords":[{"id":"https://openalex.org/keywords/microwave-remote-sensing","display_name":"microwave remote sensing","score":0.6669999957084656},{"id":"https://openalex.org/keywords/guinean-savanna","display_name":"Guinean savanna","score":0.5799999833106995},{"id":"https://openalex.org/keywords/guinean-forests","display_name":"Guinean forests","score":0.8389999866485596},{"id":"https://openalex.org/keywords/west-african-monsoon","display_name":"West African monsoon","score":0.7210000157356262},{"id":"https://openalex.org/keywords/scattering-index","display_name":"scattering index","score":0.7570000290870667},{"id":"https://openalex.org/keywords/ice-scattering","display_name":"ice scattering","score":0.5120000243186951},{"id":"https://openalex.org/keywords/convective-activity","display_name":"convective activity","score":0.7879999876022339},{"id":"https://openalex.org/keywords/tropical-west-africa","display_name":"tropical West Africa","score":0.5139999985694885},{"id":"https://openalex.org/keywords/land-surface-characterization","display_name":"land surface characterization","score":0.5019999742507935},{"id":"https://openalex.org/keywords/k-means-clustering","display_name":"K-means clustering","score":0.593999981880188},{"id":"https://openalex.org/keywords/principal-component-analysis","display_name":"principal component analysis","score":0.8370000123977661},{"id":"https://openalex.org/keywords/microwave-humidity-sounder","display_name":"Microwave Humidity Sounder","score":0.5720000267028809}],"concepts":[{"id":"https://openalex.org/C27438332","wikidata":"https://www.wikidata.org/wiki/Q2873","display_name":"Principal component analysis","level":2,"score":0.5271999835968018},{"id":"https://openalex.org/C62649853","wikidata":"https://www.wikidata.org/wiki/Q199687","display_name":"Remote sensing","level":1,"score":0.5091000199317932},{"id":"https://openalex.org/C53802167","wikidata":"https://www.wikidata.org/wiki/Q4538627","display_name":"Brightness temperature","level":3,"score":0.5033000111579895},{"id":"https://openalex.org/C39432304","wikidata":"https://www.wikidata.org/wiki/Q188847","display_name":"Environmental science","level":0,"score":0.4912000000476837},{"id":"https://openalex.org/C125245961","wikidata":"https://www.wikidata.org/wiki/Q221656","display_name":"Brightness","level":2,"score":0.4399000108242035},{"id":"https://openalex.org/C191486275","wikidata":"https://www.wikidata.org/wiki/Q210028","display_name":"Scattering","level":2,"score":0.41440001130104065},{"id":"https://openalex.org/C153294291","wikidata":"https://www.wikidata.org/wiki/Q25261","display_name":"Meteorology","level":1,"score":0.3677000105381012},{"id":"https://openalex.org/C91586092","wikidata":"https://www.wikidata.org/wiki/Q757520","display_name":"Atmospheric sciences","level":1,"score":0.36039999127388},{"id":"https://openalex.org/C158960510","wikidata":"https://www.wikidata.org/wiki/Q180600","display_name":"Relative humidity","level":2,"score":0.35510000586509705},{"id":"https://openalex.org/C205649164","wikidata":"https://www.wikidata.org/wiki/Q1071","display_name":"Geography","level":0,"score":0.32420000433921814},{"id":"https://openalex.org/C96960616","wikidata":"https://www.wikidata.org/wiki/Q3814470","display_name":"Microwave radiometer","level":3,"score":0.31520000100135803},{"id":"https://openalex.org/C2986587452","wikidata":"https://www.wikidata.org/wiki/Q938438","display_name":"Statistical analysis","level":2,"score":0.3151000142097473},{"id":"https://openalex.org/C151420433","wikidata":"https://www.wikidata.org/wiki/Q180600","display_name":"Humidity","level":2,"score":0.30790001153945923},{"id":"https://openalex.org/C49204034","wikidata":"https://www.wikidata.org/wiki/Q52139","display_name":"Climatology","level":1,"score":0.3068000078201294},{"id":"https://openalex.org/C136996986","wikidata":"https://www.wikidata.org/wiki/Q42967","display_name":"Monsoon","level":2,"score":0.30329999327659607},{"id":"https://openalex.org/C44838205","wikidata":"https://www.wikidata.org/wiki/Q127995","display_name":"Microwave","level":2,"score":0.30149999260902405},{"id":"https://openalex.org/C127313418","wikidata":"https://www.wikidata.org/wiki/Q1069","display_name":"Geology","level":0,"score":0.2535000145435333}],"mesh":[],"locations_count":1,"locations":[{"id":"pmh:oai:HAL:hal-05692304v1","doi":null,"is_oa":true,"landing_page_url":"https://hal.science/hal-05692304v1","pdf_url":null,"source":{"id":"https://openalex.org/S4306402512","display_name":"HAL","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"listed_in":[],"host_organization":"https://openalex.org/I4405252976","host_organization_name":"Centre pour la Communication Scientifique Directe","host_organization_lineage":["https://openalex.org/I4405252976"],"host_organization_lineage_names":[],"type":"repository"},"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"2026","raw_type":"info:eu-repo/semantics/preprint"}],"best_oa_location":{"id":"pmh:oai:HAL:hal-05692304v1","doi":null,"is_oa":true,"landing_page_url":"https://hal.science/hal-05692304v1","pdf_url":null,"source":{"id":"https://openalex.org/S4306402512","display_name":"HAL","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"listed_in":[],"host_organization":"https://openalex.org/I4405252976","host_organization_name":"Centre pour la Communication Scientifique Directe","host_organization_lineage":["https://openalex.org/I4405252976"],"host_organization_lineage_names":[],"type":"repository"},"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"2026","raw_type":"info:eu-repo/semantics/preprint"},"sustainable_development_goals":[{"display_name":"Climate action","score":0.5351999998092651,"id":"https://metadata.un.org/sdg/13"}],"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/W7112296417","https://openalex.org/W2993861504","https://openalex.org/W7116759412","https://openalex.org/W6930598544","https://openalex.org/W7036669736","https://openalex.org/W1971588794","https://openalex.org/W4251341345","https://openalex.org/W1503806632","https://openalex.org/W2072987848","https://openalex.org/W7221481936"],"abstract_inverted_index":{"Passive":[0],"microwave":[1],"remote":[2],"sensing":[3],"provides":[4],"unique":[5],"capabilities":[6],"for":[7,251,299],"characterizing":[8],"land":[9],"surface":[10],"and":[11,25,48,59,73,130,147,160,221,304],"atmospheric":[12],"conditions":[13],"over":[14,164,190,265],"tropical":[15],"West":[16,182],"Africa,":[17],"where":[18],"in":[19,263],"situ":[20],"observation":[21],"networks":[22],"remain":[23],"sparse":[24],"heterogeneous.":[26],"This":[27],"study":[28],"presents":[29],"a":[30,175,295],"comprehensive":[31],"characterization":[32],"of":[33,82,110,211,241,247,281],"Guinea's":[34,301],"four":[35,234],"natural":[36,235,302],"regions":[37,236,303],"Basse":[38],"Guin\u00e9e":[39,42,46,49,114,128,132,191,266],"(Maritime),":[40],"Moyenne":[41,131],"(Fouta":[43],"Djallon),":[44],"Haute":[45,113],"(Savanna),":[47],"Foresti\u00e8re":[50,129,192,267],"using":[51],"multi-channel":[52,292],"ATOVS":[53,111,291],"(Advanced":[54],"TIROS":[55],"Operational":[56],"Vertical":[57],"Sounder)":[58,63],"MHS":[60],"(Microwave":[61],"Humidity":[62],"brightness":[64,136],"temperature":[65],"(T_B)":[66],"data":[67,293],"at":[68,90,138],"19,":[69],"23,":[70],"37,":[71],"85,":[72],"92":[74],"GHz,":[75],"spanning":[76],"the":[77,107,117,134,181,205,217,223,233,244,248],"period":[78],"2002-2022.":[79],"Statistical":[80],"analyses":[81],"T_B":[83,119],"distributions":[84],"reveal":[85],"highly":[86],"significant":[87,260],"inter-regional":[88],"differences":[89],"all":[91],"channels":[92],"(Kruskal-Wallis":[93],"H":[94],">":[95,101],"796,":[96],"p":[97,103,275],"<":[98,104,276],"0.001;":[99],"F-ANOVA":[100],"424,":[102],"0.001),":[105],"validating":[106],"discriminatory":[108],"power":[109],"observations.":[112],"consistently":[115],"exhibits":[116,174],"warmest":[118],"values":[120,188],"(T_B85":[121,141],"=":[122,142,149,171,194,230,273],"249.7":[123],"\u00b1":[124,144,151,196],"24.6":[125],"K)":[126],"while":[127],"display":[133],"lowest":[135],"temperatures":[137],"high":[139],"frequencies":[140],"207.4":[143],"31.7":[145],"K":[146,269],"T_B92":[148],"199.1":[150],"33.2":[152],"K,":[153],"respectively),":[154],"attributable":[155],"to":[156,285,307],"intense":[157],"convective":[158,282],"activity":[159],"deep":[161],"ice":[162],"scattering":[163],"these":[165],"regions.":[166],"The":[167],"Scattering":[168],"Index":[169],"(SI":[170],"T_B19":[172],"-T_B85)":[173],"strong":[176],"seasonal":[177],"cycle,":[178],"peaking":[179],"during":[180],"African":[183],"Monsoon":[184],"(JJA),":[185],"with":[186,214,237,279],"maximum":[187],"observed":[189],"(SI_JJA":[193],"38.5":[195],"12.3":[197],"K).":[198],"Principal":[199],"Component":[200],"Analysis":[201],"(PCA)":[202],"reveals":[203,258],"that":[204],"first":[206],"two":[207],"components":[208],"explain":[209],"87.4%":[210],"total":[212],"variance,":[213],"PC1":[215],"representing":[216],"overall":[218,239],"emissionscattering":[219],"contrast":[220],"PC2":[222],"vapour-emission":[224],"regime.":[225],"Unsupervised":[226],"K-Means":[227],"clustering":[228],"(k":[229],"4)":[231],"recovers":[232],"an":[238],"accuracy":[240],"78.3%,":[242],"demonstrating":[243],"physical":[245],"relevance":[246],"spectral":[249],"space":[250],"regional":[252],"classification.":[253],"Long-term":[254],"trend":[255],"analysis":[256],"(2002-2022)":[257],"statistically":[259],"decreasing":[261],"trends":[262],"T_B85":[264],"(-0.30":[268],"yr\u207b":[270],"\u00b9;":[271],"r":[272],"-0.72,":[274],"0.01),":[277],"consistent":[278],"intensification":[280],"precipitation":[283],"linked":[284],"global":[286],"warming.":[287],"These":[288],"results":[289],"establish":[290],"as":[294],"robust,":[296],"operational":[297],"framework":[298],"monitoring":[300],"their":[305],"response":[306],"climate":[308],"variability.":[309]},"counts_by_year":[],"updated_date":"2026-11-09T13:22:03.289127","created_date":"2026-10-12T00:00:00"}