{"id":"https://openalex.org/W1985064626","doi":"https://doi.org/10.1109/jstars.2013.2275176","title":"Variations of Foliage Chlorophyll fAPAR and Foliage Non-Chlorophyll fAPAR (fAPAR$_{\\rm chl}$, fAPAR$_{\\rm non\\mathchar \"702D chl}$) at the Harvard Forest","display_name":"Variations of Foliage Chlorophyll fAPAR and Foliage Non-Chlorophyll fAPAR (fAPAR$_{\\rm chl}$, fAPAR$_{\\rm non\\mathchar \"702D chl}$) at the Harvard Forest","publication_year":2013,"publication_date":"2013-08-15","ids":{"openalex":"https://openalex.org/W1985064626","doi":"https://doi.org/10.1109/jstars.2013.2275176","mag":"1985064626"},"language":"en","primary_location":{"id":"doi:10.1109/jstars.2013.2275176","is_oa":false,"landing_page_url":"https://doi.org/10.1109/jstars.2013.2275176","pdf_url":null,"source":{"id":"https://openalex.org/S117727964","display_name":"IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing","issn_l":"1939-1404","issn":["1939-1404","2151-1535"],"is_oa":false,"is_in_doaj":true,"is_core":true,"host_organization":"https://openalex.org/P4310319808","host_organization_name":"Institute of Electrical and Electronics Engineers","host_organization_lineage":["https://openalex.org/P4310319808"],"host_organization_lineage_names":["Institute of Electrical and Electronics Engineers"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing","raw_type":"journal-article"},"type":"article","indexed_in":["crossref","doaj"],"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/A5100741388","display_name":"Qingyuan Zhang","orcid":"https://orcid.org/0000-0003-0823-308X"},"institutions":[{"id":"https://openalex.org/I1329765538","display_name":"Universities Space Research Association","ror":"https://ror.org/043pgqy52","country_code":"US","type":"nonprofit","lineage":["https://openalex.org/I1329765538"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"Qingyuan Zhang","raw_affiliation_strings":["Universities Space Research Association, Columbia, MD, US","Univ. Space Res. Assoc., Columbia, MD, USA"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Universities Space Research Association, Columbia, MD, US","institution_ids":["https://openalex.org/I1329765538"]},{"raw_affiliation_string":"Univ. Space Res. Assoc., Columbia, MD, USA","institution_ids":["https://openalex.org/I1329765538"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5114169249","display_name":"Elizabeth M. Middleton","orcid":null},"institutions":[{"id":"https://openalex.org/I1306266525","display_name":"Goddard Space Flight Center","ror":"https://ror.org/0171mag52","country_code":"US","type":"facility","lineage":["https://openalex.org/I1306266525","https://openalex.org/I4210124779"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"Elizabeth M. Middleton","raw_affiliation_strings":["Biospheric Sciences Laboratory, NASA Goddard Space Flight Center, Greenbelt, MD, USA","Biospheric Sci. Lab., NASA Goddard Space Flight Center, Greenbelt, MD, USA"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Biospheric Sciences Laboratory, NASA Goddard Space Flight Center, Greenbelt, MD, USA","institution_ids":["https://openalex.org/I1306266525"]},{"raw_affiliation_string":"Biospheric Sci. Lab., NASA Goddard Space Flight Center, Greenbelt, MD, USA","institution_ids":["https://openalex.org/I1306266525"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5102980514","display_name":"Yen-Ben Cheng","orcid":"https://orcid.org/0000-0002-6586-4315"},"institutions":[{"id":"https://openalex.org/I4210092411","display_name":"Earth Resources Technology (United States)","ror":"https://ror.org/00fhn5p96","country_code":"US","type":"company","lineage":["https://openalex.org/I4210092411"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"Yen-Ben Cheng","raw_affiliation_strings":["Earth Resources Technology (ERT), Inc., Laurel, Maryland, USA","Earth Resources Technol. (ERT), Inc., Laurel, MD, USA"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Earth Resources Technology (ERT), Inc., Laurel, Maryland, USA","institution_ids":["https://openalex.org/I4210092411"]},{"raw_affiliation_string":"Earth Resources Technol. (ERT), Inc., Laurel, MD, USA","institution_ids":["https://openalex.org/I4210092411"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5034896164","display_name":"David Landis","orcid":null},"institutions":[{"id":"https://openalex.org/I4210099313","display_name":"Sigma Space (United States)","ror":"https://ror.org/0187tsx41","country_code":"US","type":"company","lineage":["https://openalex.org/I4210099313"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"David R. Landis","raw_affiliation_strings":["Sigma Space Corp, Lanham, MD, US","Sigma Space Corp., Lanham, MD, USA"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Sigma Space Corp, Lanham, MD, US","institution_ids":["https://openalex.org/I4210099313"]},{"raw_affiliation_string":"Sigma Space Corp., Lanham, MD, USA","institution_ids":["https://openalex.org/I4210099313"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":4,"corresponding_author_ids":[],"corresponding_institution_ids":[],"apc_list":{"value":1250,"currency":"USD","value_usd":1250},"apc_paid":null,"fwci":5.0161,"has_fulltext":false,"cited_by_count":29,"citation_normalized_percentile":{"value":0.94665936,"is_in_top_1_percent":false,"is_in_top_10_percent":true},"cited_by_percentile_year":{"min":89,"max":99},"biblio":{"volume":"6","issue":"5","first_page":"2254","last_page":"2264"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T10111","display_name":"Remote Sensing in Agriculture","score":0.9997000098228455,"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":0.9997000098228455,"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/T11164","display_name":"Remote Sensing and LiDAR Applications","score":0.996999979019165,"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/T11588","display_name":"Atmospheric and Environmental Gas Dynamics","score":0.9961000084877014,"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/notation","display_name":"Notation","score":0.6314269304275513},{"id":"https://openalex.org/keywords/photosynthetically-active-radiation","display_name":"Photosynthetically active radiation","score":0.4362528324127197},{"id":"https://openalex.org/keywords/canopy","display_name":"Canopy","score":0.4184330105781555},{"id":"https://openalex.org/keywords/computer-science","display_name":"Computer science","score":0.37940892577171326},{"id":"https://openalex.org/keywords/remote-sensing","display_name":"Remote sensing","score":0.35097774863243103},{"id":"https://openalex.org/keywords/mathematics","display_name":"Mathematics","score":0.32533442974090576},{"id":"https://openalex.org/keywords/botany","display_name":"Botany","score":0.2058190107345581},{"id":"https://openalex.org/keywords/biology","display_name":"Biology","score":0.13397324085235596},{"id":"https://openalex.org/keywords/geography","display_name":"Geography","score":0.13229858875274658},{"id":"https://openalex.org/keywords/arithmetic","display_name":"Arithmetic","score":0.1101635992527008}],"concepts":[{"id":"https://openalex.org/C45357846","wikidata":"https://www.wikidata.org/wiki/Q2001982","display_name":"Notation","level":2,"score":0.6314269304275513},{"id":"https://openalex.org/C131366478","wikidata":"https://www.wikidata.org/wiki/Q900892","display_name":"Photosynthetically active radiation","level":3,"score":0.4362528324127197},{"id":"https://openalex.org/C101000010","wikidata":"https://www.wikidata.org/wiki/Q5033434","display_name":"Canopy","level":2,"score":0.4184330105781555},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.37940892577171326},{"id":"https://openalex.org/C62649853","wikidata":"https://www.wikidata.org/wiki/Q199687","display_name":"Remote sensing","level":1,"score":0.35097774863243103},{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.32533442974090576},{"id":"https://openalex.org/C59822182","wikidata":"https://www.wikidata.org/wiki/Q441","display_name":"Botany","level":1,"score":0.2058190107345581},{"id":"https://openalex.org/C86803240","wikidata":"https://www.wikidata.org/wiki/Q420","display_name":"Biology","level":0,"score":0.13397324085235596},{"id":"https://openalex.org/C205649164","wikidata":"https://www.wikidata.org/wiki/Q1071","display_name":"Geography","level":0,"score":0.13229858875274658},{"id":"https://openalex.org/C94375191","wikidata":"https://www.wikidata.org/wiki/Q11205","display_name":"Arithmetic","level":1,"score":0.1101635992527008},{"id":"https://openalex.org/C183688256","wikidata":"https://www.wikidata.org/wiki/Q11982","display_name":"Photosynthesis","level":2,"score":0.0}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.1109/jstars.2013.2275176","is_oa":false,"landing_page_url":"https://doi.org/10.1109/jstars.2013.2275176","pdf_url":null,"source":{"id":"https://openalex.org/S117727964","display_name":"IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing","issn_l":"1939-1404","issn":["1939-1404","2151-1535"],"is_oa":false,"is_in_doaj":true,"is_core":true,"host_organization":"https://openalex.org/P4310319808","host_organization_name":"Institute of Electrical and Electronics Engineers","host_organization_lineage":["https://openalex.org/P4310319808"],"host_organization_lineage_names":["Institute of Electrical and Electronics Engineers"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing","raw_type":"journal-article"}],"best_oa_location":null,"sustainable_development_goals":[],"awards":[],"funders":[],"has_content":{"pdf":false,"grobid_xml":false},"content_urls":null,"referenced_works_count":59,"referenced_works":["https://openalex.org/W9910819","https://openalex.org/W48001229","https://openalex.org/W61452412","https://openalex.org/W606276788","https://openalex.org/W1719242950","https://openalex.org/W1964406139","https://openalex.org/W1971351542","https://openalex.org/W1973784319","https://openalex.org/W1978160572","https://openalex.org/W1978252675","https://openalex.org/W1980901385","https://openalex.org/W1990939478","https://openalex.org/W2002879894","https://openalex.org/W2004177958","https://openalex.org/W2005840830","https://openalex.org/W2005908679","https://openalex.org/W2008241750","https://openalex.org/W2011010318","https://openalex.org/W2018027183","https://openalex.org/W2023127384","https://openalex.org/W2027822846","https://openalex.org/W2028898612","https://openalex.org/W2037615034","https://openalex.org/W2050917502","https://openalex.org/W2054502362","https://openalex.org/W2055737779","https://openalex.org/W2056760934","https://openalex.org/W2058214432","https://openalex.org/W2066612219","https://openalex.org/W2069981052","https://openalex.org/W2088478795","https://openalex.org/W2094759906","https://openalex.org/W2104588681","https://openalex.org/W2104630992","https://openalex.org/W2113024036","https://openalex.org/W2115049406","https://openalex.org/W2119513445","https://openalex.org/W2122141505","https://openalex.org/W2125763679","https://openalex.org/W2126493480","https://openalex.org/W2127831475","https://openalex.org/W2135910832","https://openalex.org/W2142464595","https://openalex.org/W2142467181","https://openalex.org/W2145429786","https://openalex.org/W2146804851","https://openalex.org/W2147423506","https://openalex.org/W2153243519","https://openalex.org/W2153717194","https://openalex.org/W2157334214","https://openalex.org/W2161925775","https://openalex.org/W2164156598","https://openalex.org/W2164574849","https://openalex.org/W2165124968","https://openalex.org/W2165540647","https://openalex.org/W2167891208","https://openalex.org/W2170418509","https://openalex.org/W2485805022","https://openalex.org/W3023336139"],"related_works":["https://openalex.org/W2368197159","https://openalex.org/W2531052405","https://openalex.org/W2953832573","https://openalex.org/W4285798603","https://openalex.org/W2903250443","https://openalex.org/W2524384275","https://openalex.org/W4311187523","https://openalex.org/W2504273662","https://openalex.org/W2391440723","https://openalex.org/W3196709081"],"abstract_inverted_index":{"<?Pub":[0],"Dtl=\"\"?>":[1],"In":[2,54,106,227],"the":[3,14,24,45,80,89,103,145,213,271],"last":[4],"three":[5,187],"decades,":[6],"substantial":[7],"advancements":[8,21],"have":[9],"been":[10],"made":[11,199],"in":[12,51,179],"understanding":[13],"global":[15],"carbon":[16,285],"cycle.":[17],"Some":[18],"of":[19,26,56,76,82,102,165,186],"these":[20,57,77,236],"involve":[22],"using":[23,83,148],"fraction":[25],"absorbed":[27],"photosynthetically":[28],"active":[29],"radiation":[30],"(fAPAR)":[31],"by":[32],"an":[33,180],"entire":[34,104],"canopy":[35],"(fAPAR":[36,92,133],"<formula":[37,93,113,122,134,204,220,239,247,256],"formulatype=\"inline\"":[38,94,114,123,135,205,221,240,248,257],"xmlns:mml=\"http://www.w3.org/1998/Math/MathML\"":[39,65,95,115,124,136,206,222,241,249,258],"xmlns:xlink=\"http://www.w3.org/1999/xlink\"><tex":[40,96,116,125,223,242,250,259],"Notation=\"TeX\">$_{\\rm":[41,97,117,126,139,209,224,243,251,260],"canopy}$</tex></formula>":[42,210,244],")":[43,100,143],"and/or":[44],"Normalized":[46],"Difference":[47],"Vegetation":[48,215],"Index":[49,216],"(NDVI)":[50],"modeling":[52],"studies.":[53,289],"spite":[55],"advancements,":[58],"large":[59],"uncertainties":[60,78],"still":[61],"remain.":[62],"Zhang":[63],"<etal":[64],"xmlns:xlink=\"http://www.w3.org/1999/xlink\"/>":[66],"(Remote":[67],"Sens.":[68],"Environ.,":[69],"2005)":[70],"[1]":[71],"tried":[72],"to":[73,88,182,234],"mitigate":[74],"some":[75],"with":[79],"concept":[81],"fAPAR":[84,112,121,132,203,219,238,246,255],"that":[85],"is":[86],"restricted":[87],"foliage":[90,130],"chlorophyll":[91,167],"chl}$</tex>":[98],"</formula>":[99,119],"instead":[101],"canopy.":[105],"this":[107],"current":[108],"study,":[109],"we":[110],"calculated":[111],"canopy}$</tex>":[118],",":[120,128,245,253],"chl}$</tex></formula>":[127,142,225,252,263],"and":[129,153,168,195,211,254,287],"non-chlorophyll":[131,169],"xmlns:xlink=\"http://www.w3.org/1999/xlink\">":[137,207],"<tex":[138,208],"non\\mathchar":[140,261],"\"702D":[141,262],"for":[144,200,212,270,282],"Harvard":[146],"Forest":[147],"a":[149],"radiative":[150],"transfer":[151],"model":[152],"multi-temporal":[154],"Earth":[155],"Observing":[156],"One":[157],"(EO-1)":[158],"Hyperion":[159,230],"satellite":[160,275],"images.":[161],"The":[162],"canopy-level":[163],"proportions":[164],"foliar":[166],"absorption":[170],"were":[171,198,232],"determined":[172],"at":[173,265],"different":[174],"seasons":[175],"(spring,":[176],"summer,":[177],"autumn)":[178],"effort":[181],"demonstrate":[183],"temporal":[184],"variations":[185],"plant":[188],"functional":[189],"types:":[190],"deciduous":[191],"forest,":[192,194],"coniferous":[193],"grass.":[196],"Comparisons":[197],"NDVI":[201],"versus":[202,218],"Enhanced":[214],"(EVI)":[217],".":[226],"addition,":[228],"EO-1":[229],"images":[231],"utilized":[233],"simulate":[235],"new":[237],"products":[264,278],"60":[266],"m":[267],"as":[268],"prototypes":[269],"proposed":[272],"NASA":[273],"HyspIRI":[274],"spectrometer.":[276],"These":[277],"should":[279],"prove":[280],"useful":[281],"future":[283],"terrestrial":[284],"cycle":[286],"ecosystem":[288]},"counts_by_year":[{"year":2023,"cited_by_count":2},{"year":2021,"cited_by_count":1},{"year":2020,"cited_by_count":4},{"year":2019,"cited_by_count":2},{"year":2018,"cited_by_count":3},{"year":2017,"cited_by_count":1},{"year":2016,"cited_by_count":4},{"year":2015,"cited_by_count":5},{"year":2014,"cited_by_count":7}],"updated_date":"2025-11-06T03:46:38.306776","created_date":"2025-10-10T00:00:00"}
