{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,1,23]],"date-time":"2026-01-23T21:51:33Z","timestamp":1769205093015,"version":"3.49.0"},"reference-count":42,"publisher":"MDPI AG","issue":"9","license":[{"start":{"date-parts":[[2018,9,10]],"date-time":"2018-09-10T00:00:00Z","timestamp":1536537600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100003141","name":"Consejo Nacional de Ciencia y Tecnolog\u00eda","doi-asserted-by":"publisher","award":["384224"],"award-info":[{"award-number":["384224"]}],"id":[{"id":"10.13039\/501100003141","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100003141","name":"Consejo Nacional de Ciencia y Tecnolog\u00eda","doi-asserted-by":"publisher","award":["SIMAC-2000107017"],"award-info":[{"award-number":["SIMAC-2000107017"]}],"id":[{"id":"10.13039\/501100003141","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100003141","name":"Consejo Nacional de Ciencia y Tecnolog\u00eda","doi-asserted-by":"publisher","award":["236864"],"award-info":[{"award-number":["236864"]}],"id":[{"id":"10.13039\/501100003141","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/100000104","name":"National Aeronautics and Space Administration","doi-asserted-by":"publisher","award":["NNX14AM3G and NNX14AQ46A"],"award-info":[{"award-number":["NNX14AM3G and NNX14AQ46A"]}],"id":[{"id":"10.13039\/100000104","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100011110","name":"Inter-American Institute for Global Change Research","doi-asserted-by":"publisher","award":["IAI-CRN3094"],"award-info":[{"award-number":["IAI-CRN3094"]}],"id":[{"id":"10.13039\/501100011110","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/100000008","name":"David and Lucile Packard Foundation","doi-asserted-by":"publisher","award":["1721"],"award-info":[{"award-number":["1721"]}],"id":[{"id":"10.13039\/100000008","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Remote Sensing"],"abstract":"<jats:p>Two semi-analytical algorithms, Generalized Inherent Optical Property (GIOP) and Garver-Siegel-Maritorena (GSM), were evaluated in terms of how well they reproduced the absorption coefficient of phytoplankton (aph(\u03bb)) and dissolved and detrital organic matter (adg(\u03bb)) at three wavelengths (\u03bb of 412, 443, and 488 nm) in a zone with optically complex waters, the Upper Gulf of California (UGC) and the Northern Gulf of California (NGC). In the UGC, detritus determines most of the total light absorption, whereas, in the NGC, chromophoric dissolved organic material (CDOM) and phytoplankton dominate. Upon comparing the results of each model with a database assembled from four cruises done from spring to summer (March through September) between 2011 and 2013, it was found that GIOP is a better estimator for aph(\u03bb) than GSM, independently of the region. However, both algorithms underestimate in situ values in the NGC, whereas they overestimate them in the UGC. Errors are associated with the following: (a) the constant a*ph(\u03bb) value used by GSM and GIOP (0.055 m2 mgChla\u22121) is higher than the most frequent value observed in this study\u2019s data (0.03 m2 mgChla\u22121), and (b) satellite-derived chlorophyll a concentration (Chla) is biased high compared with in situ Chla. GIOP gave also better results for the adg(\u03bb) estimation than GSM, especially in the NGC. The spectral slope Sdg was identified as an important parameter for estimating adg(\u03bb), and this study\u2019s results indicated that the use of a fixed input value in models was not adequate. The evaluation confirms the lack of generality of algorithms like GIOP and GSM, whose reflectance model is too simplified to capture expected variability. Finally, a greater monitoring effort is suggested in the study area regarding the collection of in situ reflectance data, which would allow explaining the effects that detritus and CDOM may have on the semi-analytical reflectance inversions, as well as isolating the possible influence of the atmosphere on the satellite-derived water reflectance and Chla.<\/jats:p>","DOI":"10.3390\/rs10091443","type":"journal-article","created":{"date-parts":[[2018,9,10]],"date-time":"2018-09-10T10:28:57Z","timestamp":1536575337000},"page":"1443","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":11,"title":["Evaluation of Semi-Analytical Algorithms to Retrieve Particulate and Dissolved Absorption Coefficients in Gulf of California Optically Complex Waters"],"prefix":"10.3390","volume":"10","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-3440-9184","authenticated-orcid":false,"given":"Stella Patricia","family":"Betancur-Turizo","sequence":"first","affiliation":[{"name":"Facultad de Ciencias Marinas, Universidad Aut\u00f3noma de Baja California, Carretera Tijuana-Ensenada Km 103, 22800 Ensenada, BC, M\u00e9xico"},{"name":"Centro de Investigaciones Oceanogr\u00e1ficas e Hidrogr\u00e1ficas del Caribe, \u00c1rea de Protecci\u00f3n del Medio Marino, Barrio Bosque, Sector Manzanillo, Cartagena de Indias, Cartagena 130001, Bol\u00edvar, Colombia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7817-5343","authenticated-orcid":false,"given":"Adriana","family":"Gonz\u00e1lez-Silvera","sequence":"additional","affiliation":[{"name":"Facultad de Ciencias Marinas, Universidad Aut\u00f3noma de Baja California, Carretera Tijuana-Ensenada Km 103, 22800 Ensenada, BC, M\u00e9xico"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1882-7714","authenticated-orcid":false,"given":"Eduardo","family":"Santamar\u00eda-del-\u00c1ngel","sequence":"additional","affiliation":[{"name":"Facultad de Ciencias Marinas, Universidad Aut\u00f3noma de Baja California, Carretera Tijuana-Ensenada Km 103, 22800 Ensenada, BC, M\u00e9xico"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9021-6873","authenticated-orcid":false,"given":"Jing","family":"Tan","sequence":"additional","affiliation":[{"name":"Scripps Institution of Oceanography, University of California San Diego, La Jolla, California, CA 92093, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4770-389X","authenticated-orcid":false,"given":"Robert","family":"Frouin","sequence":"additional","affiliation":[{"name":"Scripps Institution of Oceanography, University of California San Diego, La Jolla, California, CA 92093, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2018,9,10]]},"reference":[{"key":"ref_1","unstructured":"McClain, C.R., Cleave, M.L., Feldman, G.C., Gregg, W.W., Hooker, S.B., and Kuring, N. 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