{"id":"https://openalex.org/W2065769575","doi":"https://doi.org/10.1080/01431168608948955","title":"Growing period and drought early warning in Africa using satellite data","display_name":"Growing period and drought early warning in Africa using satellite data","publication_year":1986,"publication_date":"1986-11-01","ids":{"openalex":"https://openalex.org/W2065769575","doi":"https://doi.org/10.1080/01431168608948955","mag":"2065769575"},"language":"en","primary_location":{"id":"doi:10.1080/01431168608948955","doi":"https://doi.org/10.1080/01431168608948955","is_oa":false,"landing_page_url":"https://doi.org/10.1080/01431168608948955","pdf_url":null,"source":{"id":"https://openalex.org/S117411352","display_name":"International Journal of Remote Sensing","issn_l":"0143-1161","issn":["0143-1161","1366-5901"],"is_oa":false,"is_in_doaj":false,"is_core":true,"listed_in":["anvur-scientific","cwts-core","dongbi-d","jufo-1","norway-2","poland-70","russia-white-list-1","vabb-shw"],"host_organization":"https://openalex.org/P4310320547","host_organization_name":"Taylor & Francis","host_organization_lineage":["https://openalex.org/P4310320547","https://openalex.org/P4310320449"],"host_organization_lineage_names":["Taylor & Francis","Informa"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"International Journal of Remote Sensing","raw_type":"journal-article"},"volume":null,"type":"article","is_traditional":true,"indexed_in":["crossref"],"open_access":{"is_oa":false,"oa_status":"closed","oa_url":null,"any_repository_has_fulltext":false},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5090724742","display_name":"B. L. Henricksen","orcid":null,"observed_orcids":[]},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"B. L. HENRICKSEN","raw_affiliation_strings":["a  Computer Unit, ILCA , P.O. Box 5689, Addis Ababa,  Ethiopia","Computer Unit, ILCA , P.O. Box 5689, Addis Ababa, Ethiopia"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"a  Computer Unit, ILCA , P.O. Box 5689, Addis Ababa,  Ethiopia","institution_ids":[]},{"raw_affiliation_string":"Computer Unit, ILCA , P.O. Box 5689, Addis Ababa, Ethiopia","institution_ids":[]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5113952202","display_name":"J.W. Durkin","orcid":null,"observed_orcids":[]},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"J. W. DURKIN","raw_affiliation_strings":["a  Computer Unit, ILCA , P.O. Box 5689, Addis Ababa,  Ethiopia","Computer Unit, ILCA , P.O. Box 5689, Addis Ababa, Ethiopia"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"a  Computer Unit, ILCA , P.O. Box 5689, Addis Ababa,  Ethiopia","institution_ids":[]},{"raw_affiliation_string":"Computer Unit, ILCA , P.O. Box 5689, Addis Ababa, Ethiopia","institution_ids":[]}]}],"institutions":[],"countries_distinct_count":0,"institutions_distinct_count":0,"corresponding_author_ids":[],"corresponding_institution_ids":[],"apc_list":null,"apc_paid":null,"fwci":5.0,"has_fulltext":false,"cited_by_count":107,"citation_normalized_percentile":{"value":0.95657419,"is_in_top_1_percent":false,"is_in_top_10_percent":true},"cited_by_percentile_year":{"min":88,"max":98},"biblio":{"volume":"7","issue":"11","first_page":"1583","last_page":"1608"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T10111","display_name":"Remote Sensing in Agriculture","score":0.9560999870300293,"subfield":{"id":"https://openalex.org/subfields/2303","display_name":"Ecology"},"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/T10111","display_name":"Remote Sensing in Agriculture","score":0.9560999870300293,"subfield":{"id":"https://openalex.org/subfields/2303","display_name":"Ecology"},"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/T11186","display_name":"Hydrology and Drought Analysis","score":0.041600000113248825,"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/T11312","display_name":"Soil Moisture and Remote Sensing","score":0.00139999995008111,"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"}}],"keywords":[{"id":"https://openalex.org/keywords/drought-early-warning","display_name":"drought early warning","score":0.9990000128746033},{"id":"https://openalex.org/keywords/normalized-difference-vegetation-index","display_name":"NDVI","score":0.6330000162124634},{"id":"https://openalex.org/keywords/soil-moisture-index","display_name":"soil moisture index","score":0.828000009059906},{"id":"https://openalex.org/keywords/avhrr","display_name":"AVHRR","score":0.8550000190734863},{"id":"https://openalex.org/keywords/ethiopia","display_name":"Ethiopia","score":0.5529999732971191},{"id":"https://openalex.org/keywords/vegetation-phenology","display_name":"vegetation phenology","score":0.6779999732971191},{"id":"https://openalex.org/keywords/potential-evapotranspiration","display_name":"potential evapotranspiration","score":0.7310000061988831},{"id":"https://openalex.org/keywords/precipitation","display_name":"precipitation","score":0.3310000002384186}],"concepts":[{"id":"https://openalex.org/C1549246","wikidata":"https://www.wikidata.org/wiki/Q718775","display_name":"Normalized Difference Vegetation Index","level":3,"score":0.8904436826705933},{"id":"https://openalex.org/C2777480484","wikidata":"https://www.wikidata.org/wiki/Q300146","display_name":"Advanced very-high-resolution radiometer","level":3,"score":0.8486148118972778},{"id":"https://openalex.org/C39432304","wikidata":"https://www.wikidata.org/wiki/Q188847","display_name":"Environmental science","level":0,"score":0.7539910078048706},{"id":"https://openalex.org/C176783924","wikidata":"https://www.wikidata.org/wiki/Q828158","display_name":"Evapotranspiration","level":2,"score":0.633686363697052},{"id":"https://openalex.org/C107054158","wikidata":"https://www.wikidata.org/wiki/Q25257","display_name":"Precipitation","level":2,"score":0.577584445476532},{"id":"https://openalex.org/C24939127","wikidata":"https://www.wikidata.org/wiki/Q373499","display_name":"Water content","level":2,"score":0.5534647703170776},{"id":"https://openalex.org/C2776133958","wikidata":"https://www.wikidata.org/wiki/Q7918366","display_name":"Vegetation (pathology)","level":2,"score":0.5269409418106079},{"id":"https://openalex.org/C49204034","wikidata":"https://www.wikidata.org/wiki/Q52139","display_name":"Climatology","level":1,"score":0.5146483182907104},{"id":"https://openalex.org/C137660486","wikidata":"https://www.wikidata.org/wiki/Q732240","display_name":"Growing season","level":2,"score":0.47599661350250244},{"id":"https://openalex.org/C19269812","wikidata":"https://www.wikidata.org/wiki/Q26540","display_name":"Satellite","level":2,"score":0.4613611102104187},{"id":"https://openalex.org/C91586092","wikidata":"https://www.wikidata.org/wiki/Q757520","display_name":"Atmospheric sciences","level":1,"score":0.3238886594772339},{"id":"https://openalex.org/C132651083","wikidata":"https://www.wikidata.org/wiki/Q7942","display_name":"Climate change","level":2,"score":0.25293582677841187},{"id":"https://openalex.org/C205649164","wikidata":"https://www.wikidata.org/wiki/Q1071","display_name":"Geography","level":0,"score":0.23917505145072937},{"id":"https://openalex.org/C153294291","wikidata":"https://www.wikidata.org/wiki/Q25261","display_name":"Meteorology","level":1,"score":0.21473243832588196},{"id":"https://openalex.org/C127313418","wikidata":"https://www.wikidata.org/wiki/Q1069","display_name":"Geology","level":0,"score":0.13184720277786255},{"id":"https://openalex.org/C59822182","wikidata":"https://www.wikidata.org/wiki/Q441","display_name":"Botany","level":1,"score":0.0},{"id":"https://openalex.org/C127413603","wikidata":"https://www.wikidata.org/wiki/Q11023","display_name":"Engineering","level":0,"score":0.0},{"id":"https://openalex.org/C142724271","wikidata":"https://www.wikidata.org/wiki/Q7208","display_name":"Pathology","level":1,"score":0.0},{"id":"https://openalex.org/C146978453","wikidata":"https://www.wikidata.org/wiki/Q3798668","display_name":"Aerospace engineering","level":1,"score":0.0},{"id":"https://openalex.org/C111368507","wikidata":"https://www.wikidata.org/wiki/Q43518","display_name":"Oceanography","level":1,"score":0.0},{"id":"https://openalex.org/C71924100","wikidata":"https://www.wikidata.org/wiki/Q11190","display_name":"Medicine","level":0,"score":0.0},{"id":"https://openalex.org/C18903297","wikidata":"https://www.wikidata.org/wiki/Q7150","display_name":"Ecology","level":1,"score":0.0},{"id":"https://openalex.org/C187320778","wikidata":"https://www.wikidata.org/wiki/Q1349130","display_name":"Geotechnical engineering","level":1,"score":0.0},{"id":"https://openalex.org/C86803240","wikidata":"https://www.wikidata.org/wiki/Q420","display_name":"Biology","level":0,"score":0.0}],"mesh":[],"locations_count":2,"locations":[{"id":"doi:10.1080/01431168608948955","doi":"https://doi.org/10.1080/01431168608948955","is_oa":false,"landing_page_url":"https://doi.org/10.1080/01431168608948955","pdf_url":null,"source":{"id":"https://openalex.org/S117411352","display_name":"International Journal of Remote Sensing","issn_l":"0143-1161","issn":["0143-1161","1366-5901"],"is_oa":false,"is_in_doaj":false,"is_core":true,"listed_in":["anvur-scientific","cwts-core","dongbi-d","jufo-1","norway-2","poland-70","russia-white-list-1","vabb-shw"],"host_organization":"https://openalex.org/P4310320547","host_organization_name":"Taylor & Francis","host_organization_lineage":["https://openalex.org/P4310320547","https://openalex.org/P4310320449"],"host_organization_lineage_names":["Taylor & Francis","Informa"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"International Journal of Remote Sensing","raw_type":"journal-article"},{"id":"pmh:oai:cgspace.cgiar.org:10568/28806","doi":null,"is_oa":false,"landing_page_url":"https://hdl.handle.net/10568/28806","pdf_url":null,"source":{"id":"https://openalex.org/S4306402055","display_name":"CGSPace A Repository of Agricultural Research Outputs (Consultative Group for International Agricultural Research)","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"listed_in":[],"host_organization":"https://openalex.org/I1286583668","host_organization_name":"CGIAR","host_organization_lineage":["https://openalex.org/I1286583668"],"host_organization_lineage_names":[],"type":"repository"},"license":null,"license_id":null,"version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"International Journal of Remote Sensing;7(11): 1583-1608","raw_type":"Journal Article"}],"best_oa_location":null,"sustainable_development_goals":[{"score":0.8409000039100647,"id":"https://metadata.un.org/sdg/2","display_name":"Zero hunger"}],"study_designs":[],"awards":[],"funders":[{"id":"https://openalex.org/F4320306101","display_name":"National Aeronautics and Space Administration","ror":"https://ror.org/027ka1x80"}],"has_content":{"grobid_xml":false,"pdf":false},"content_urls":null,"referenced_works_count":15,"referenced_works":["https://openalex.org/W1499955781","https://openalex.org/W1969974566","https://openalex.org/W1974047452","https://openalex.org/W1981978730","https://openalex.org/W2005310724","https://openalex.org/W2035749736","https://openalex.org/W2056447651","https://openalex.org/W2092722122","https://openalex.org/W2136036783","https://openalex.org/W2159120953","https://openalex.org/W2169509889","https://openalex.org/W2314596515","https://openalex.org/W2549310942","https://openalex.org/W2897100121","https://openalex.org/W4285719527"],"related_works":["https://openalex.org/W2033510830","https://openalex.org/W2040853133","https://openalex.org/W2026971306","https://openalex.org/W2025485215","https://openalex.org/W2024931795","https://openalex.org/W360616926","https://openalex.org/W2160646087","https://openalex.org/W1831107692","https://openalex.org/W2161881124","https://openalex.org/W2072710223"],"abstract_inverted_index":{"Vegetation":[0],"growing":[1,74,127,160,169],"periods":[2,128,170],"for":[3,7,32],"1983-84":[4],"were":[5],"determined":[6],"28":[8],"sites":[9],"in":[10,93,141,198,200],"Ethiopia":[11],"using":[12],"data":[13,59],"from":[14,36,56],"the":[15,23,49,57,69,121,126,132,144,155,209],"Advanced":[16],"Very":[17],"High":[18],"Resolution":[19],"Radiometer":[20],"(AVHRR)":[21],"on":[22],"NOAA":[24],"series":[25,134],"of":[26,46,48,63,73,103,111,125,135,143,159,165],"meteorological":[27,106],"satellites.":[28],"Results":[29],"offer":[30],"promise":[31],"drought":[33],"early":[34],"warning":[35],"space.":[37],"A":[38,108],"strong":[39],"correlation":[40],"(r=0\u00b799)":[41],"was":[42,117],"found":[43],"between":[44,190],"rates":[45],"change":[47],"normalized":[50],"difference":[51],"vegetation":[52,147],"index":[53,67,78,192],"(NDVI)":[54],"derived":[55],"AVHRR":[58],"and":[60,71,89,123,129,157,167,193,213],"threshold":[61,110],"values":[62,142],"a":[64,94,181,188],"soil":[65,86],"moisture":[66,77,87,96,109,191],"at":[68,154],"beginning":[70,122,156],"ends":[72],"periods.":[75,161],"The":[76],"(P":[79,112],"+":[80,113],"S)/ETp":[81,114],"relates":[82],"precipitation":[83],"P,":[84],"stored":[85],"S":[88],"potential":[90],"evapotranspiration":[91],"ETp":[92],"simple":[95],"balance":[97],"(LPG)":[98],"model":[99],"that":[100],"requires":[101],"inputs":[102],"standard":[104],"monthly":[105],"data.":[107],"=":[115],"0\u00b75":[116],"used":[118],"to":[119,130,173,178],"identify":[120],"end":[124,158],"calibrate":[131],"time":[133],"NDVI":[136,145,196],"responses.":[137],"Trends":[138],"also":[139],"detected":[140],"during":[146,180,208,218],"growth":[148,183,211,220],"cycles":[149],"suggest":[150],"useful":[151],"minima":[152,164],"exist":[153],"Below":[162],"respective":[163],"0\u00b710":[166],"0\u00b722,":[168],"are":[171],"unlikely":[172],"have":[174],"been":[175],"initiated":[176],"or":[177,205,215],"continue":[179],"declining":[182,219],"stage.":[184],"Correlation":[185],"analysis":[186],"indicated":[187],"relation":[189],"NDVI,":[194],"with":[195],"lagging":[197],"time,":[199],"most":[201],"cases,":[202],"by":[203],"5":[204],"less":[206],"weeks":[207,217],"initial":[210],"stage":[212],"6":[214],"more":[216]},"counts_by_year":[{"year":2025,"cited_by_count":2},{"year":2024,"cited_by_count":1},{"year":2023,"cited_by_count":2},{"year":2022,"cited_by_count":1},{"year":2021,"cited_by_count":3},{"year":2019,"cited_by_count":2},{"year":2017,"cited_by_count":4},{"year":2016,"cited_by_count":2},{"year":2015,"cited_by_count":6},{"year":2014,"cited_by_count":3},{"year":2013,"cited_by_count":5},{"year":2012,"cited_by_count":2}],"updated_date":"2026-11-07T11:25:07.637180","created_date":"2016-06-24T00:00:00"}