FN Archimer Export Format PT J TI Correction of profiles of in-situ chlorophyll fluorometry for the contribution of fluorescence originating from non-algal matter BT AF XING, Xiaogang CLAUSTRE, Herve BOSS, Emmanuel ROESLER, Collin ORGANELLI, Emanuele POTEAU, Antoine BARBIEUX, Marie D'ORTENZIO, Fabrizio AS 1:1,2;2:3;3:4;4:5;5:3,6;6:3;7:3;8:3; FF 1:;2:;3:;4:;5:;6:;7:;8:; C1 State Ocean Adm, State Key Lab Satellite Ocean Environm Dynam, Inst Oceanog 2, Hangzhou, Zhejiang, Peoples R China. Univ Laval, Takuvik Joint Int Lab & Quebec Ocean, Quebec City, PQ, Canada. UPMC Univ Paris 06, Sorbonne Univ, LOV, CNRS,UMR 7093, Villefranche Sur Mer, France. Univ Maine, Sch Marine Sci, Orono, ME USA. Bowdoin Coll, Dept Earth & Oceanog Sci, Brunswick, ME 04011 USA. Plymouth Marine Lab, Prospect Pl, Plymouth, Devon, England. C2 SOA, CHINA UNIV LAVAL, CANADA UNIV PARIS 06, FRANCE UNIV MAINE US, USA BOWDOIN COLL, USA PML, UK IF 2.015 TC 40 UR https://archimer.ifremer.fr/doc/00661/77327/78783.pdf LA English DT Article CR BIOSOPE OISO - OCÉAN INDIEN SERVICE D'OBSERVATION BO L'Atalante AB In situ chlorophyll fluorometers have been widely employed for more than half a century, and to date, it still remains the most used instrument to estimate chlorophyll-a concentration in the field, especially for measurements onboard autonomous observation platforms, e.g., Bio-Argo floats and gliders. However, in deep waters (> 300 m) of some specific regions, e.g., subtropical gyres and the Black Sea, the chlorophyll fluorescence profiles frequently reveal "deep sea red fluorescence" features. In line with previous studies and through the analysis of a large data set (cruise transect in the South East Pacific and data acquired by 82 Bio-Argo floats), we show that the fluorescence signal measured by a humic-like DOM fluorometer is highly correlated to the "deep sea red fluorescence" features. Both fluorescence signals are indeed linearly related in deep waters. To remove the contribution of non-algal organic matter from chlorophyll fluorescence profiles, we introduce a new correction. Rather that removing a constant value (generally the deepest chlorophyll a fluorescence value from the profile, i.e., so-called "deep-offset correction"), we propose a correction method which relies on DOM fluorometry and on its variation with depth. This new method is validated with chlorophyll concentration extracted from water samples and further applied on the Bio-Argo float data set. More generally, we discuss the potential of the proposed method to become a standard and routine procedure in quality-control and correction of chlorophyll a fluorescence originating from Bio-Argo network. PY 2017 PD JAN SO Limnology And Oceanography-methods SN 1541-5856 PU Wiley-blackwell VL 15 IS 1 UT 000394962100006 BP 80 EP 93 DI 10.1002/lom3.10144 ID 77327 ER EF