<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="6.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Masotti, I.</style></author><author><style face="normal" font="default" size="100%">Belviso, S.</style></author><author><style face="normal" font="default" size="100%">Alvain, S.</style></author><author><style face="normal" font="default" size="100%">Johnson, J. E.</style></author><author><style face="normal" font="default" size="100%">Bates, T. S.</style></author><author><style face="normal" font="default" size="100%">Tortell, P. D.</style></author><author><style face="normal" font="default" size="100%">Kasamatsu, N.</style></author><author><style face="normal" font="default" size="100%">Mongin, M.</style></author><author><style face="normal" font="default" size="100%">Marandino, C. A.</style></author><author><style face="normal" font="default" size="100%">Saltzman, E. S.</style></author><author><style face="normal" font="default" size="100%">Moulin, C.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Spatial and temporal variability of the dimethylsulfide to chlorophyll ratio in the surface ocean: an assessment based on phytoplankton group dominance determined from space</style></title><secondary-title><style face="normal" font="default" size="100%">Biogeosciences</style></secondary-title><alt-title><style face="normal" font="default" size="100%">Biogeosciences</style></alt-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">climate feedback</style></keyword><keyword><style  face="normal" font="default" size="100%">coccolithophore bloom</style></keyword><keyword><style  face="normal" font="default" size="100%">dimethylsulfoniopropionate</style></keyword><keyword><style  face="normal" font="default" size="100%">dms</style></keyword><keyword><style  face="normal" font="default" size="100%">eastern tropical pacific</style></keyword><keyword><style  face="normal" font="default" size="100%">indian-ocean</style></keyword><keyword><style  face="normal" font="default" size="100%">iron fertilization</style></keyword><keyword><style  face="normal" font="default" size="100%">ross-sea</style></keyword><keyword><style  face="normal" font="default" size="100%">seasonal-variation</style></keyword><keyword><style  face="normal" font="default" size="100%">southern-ocean</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2010</style></year></dates><number><style face="normal" font="default" size="100%">10</style></number><volume><style face="normal" font="default" size="100%">7</style></volume><pages><style face="normal" font="default" size="100%">3215-3237</style></pages><isbn><style face="normal" font="default" size="100%">1726-4170</style></isbn><language><style face="normal" font="default" size="100%">English</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;Dimethylsulfoniopropionate (DMSP) is produced in surface seawater by phytoplankton. Phytoplankton culture experiments have shown that nanoeucaryotes (NANO) display much higher mean DMSP-to-Carbon or DMSP-to-Chlorophyll (Chl) ratios than Prochlorococcus (PRO), Synechococcus (SYN) or diatoms (DIAT). Moreover, the DMSP-lyase activity of algae which cleaves DMSP into dimethylsulfide (DMS) is even more group specific than DMSP itself. Ship-based observations have shown at limited spatial scales, that sea surface DMS-to-Chl ratios (DMS: Chl) are dependent on the composition of phytoplankton groups. Here we use satellite remote sensing of Chl (from SeaWiFS) and of Phytoplankton Group Dominance (PGD from PHYSAT) with ship-based sea surface DMS concentrations (8 cruises in total) to assess this dependence on an unprecedented spatial scale. PHYSAT provides PGD (either NANO, PRO, SYN, DIAT, Phaeocystis (PHAEO) or coccolithophores (COC)) in each satellite pixel (1/4 degrees horizontal resolution). While there are identification errors in the PHYSAT method, it is important to note that these errors are lowest for NANO PGD which we typify by high DMSP: Chl. In summer, in the Indian sector of the Southern Ocean, we find that mean DMS: Chl associated with NANO + PHAEO and PRO + SYN + DIAT are 13.6 +/- 8.4 mmol g(-1) (n = 34) and 7.3 +/- 4.8 mmol g(-1) (n = 24), respectively. That is a statistically significant difference (P &amp;lt; 0.001) that is consistent with NANO and PHAEO being relatively high DMSP producers. However, in the western North Atlantic between 40 degrees N and 60 degrees N, we find no significant difference between the same PGD. This is most likely because coccolithophores account for the non-dominant part of the summer phytoplankton assemblages. Meridional distributions at 22 degrees W in the Atlantic, and 95 degrees W and 110 degrees W in the Pacific, both show a marked drop in DMS: Chl near the equator, down to few mmol g(-1), yet the basins exhibit different PGD (NANO in the Atlantic, PRO and SYN in the Pacific). In tropical and subtropical Atlantic and Pacific waters away from the equatorial and coastal upwelling, mean DMS: Chl associated with high and low DMSP producers are statistically significantly different, but the difference is opposite of that expected from culture experiments. Hence, in a majority of cases PGD is not of primary importance in controlling DMS: Chl variations. We therefore conclude that water-leaving radiance spectra obtained simultaneously from ocean color sensor measurements of Chl concentrations and dominant phytoplankton groups can not be used to predict global fields of DMS.&lt;/p&gt;</style></abstract><work-type><style face="normal" font="default" size="100%">Article</style></work-type><accession-num><style face="normal" font="default" size="100%">ISI:000283659200019</style></accession-num><notes><style face="normal" font="default" size="100%">&lt;p&gt;ISI Document Delivery No.: 673KMTimes Cited: 0Cited Reference Count: 52Cited References:      ALVAIN S, 2005, DEEP-SEA RES PT I, V52, P1989, DOI     10.1016/j.dsr.2005.06.015     ALVAIN S, 2008, GLOBAL BIOGEOCHEM CY, V22, ARTN GB3001     BARLOW R, 2005, AFR J MAR SCI, V27, P275     BATES TS, 1987, J GEOPHYS RES-OCEANS, V92, P2930     BATES TS, 1997, GEOPHYS RES LETT, V24, P861     BATES TS, 2001, J GEOPHYS RES-ATMOS, V106, P20767     BEHRENFELD MJ, 2006, J MAR RES, V64, P431     BELVISO S, 2003, DEEP-SEA RES PT I, V50, P543, DOI     10.1016/S0967-0637(03)00032-3     BELVISO S, 2004, GLOBAL BIOGEOCHEM CY, V18, ARTN GB3013     BELVISO S, 2008, DEEP-SEA RES PT II, V55, P893, DOI     10.1016/j.dsr2.2007.12.040     BOPP L, 2003, TELLUS B, V55, P11     BOPP L, 2008, DEEP-SEA RES PT II, V55, P901, DOI     10.1016/j.dsr2.2007.12.002     BOUILLON RC, 2004, GEOPHYS RES LETT, V31, ARTN L06310     BROWN CW, 1994, J GEOPHYS RES-OCEANS, V99, P7467     BUCCIARELLI E, 2003, LIMNOL OCEANOGR, V48, P2256     CARSLAW KS, 2010, ATMOS CHEM PHYS, V10, P1701     CHARLSON RJ, 1987, NATURE, V326, P655     COLOMB A, 2009, ENVIRON CHEM, V6, P70, DOI 10.1071/EN08072     DACEY JWH, 1998, DEEP-SEA RES PT I, V45, P2085     FIEDLER PC, 2006, PROG OCEANOGR, V69, P143, DOI     10.1016/j.pocean.2006.03.008     FRANKLIN DJ, 2009, PROG OCEANOGR, V83, P134, DOI     10.1016/j.pocean.2009.07.011     GOFFART A, 2000, J MARINE SYST, V27, P161     HALLORAN PR, 2010, BIOGEOSCIENCES, V7, P1645, DOI 10.5194/bg-7-1645-2010     KASAMATSU N, 2004, CAN J FISH AQUAT SCI, V61, P736, DOI 10.1139/F04-072     KELLER MD, 1989, BIOGENIC SULFUR ENV, P167     KETTLE AJ, 1999, GLOBAL BIOGEOCHEM CY, V13, P399     KIENE RP, 2000, J SEA RES, V43, P209     LEBLANC K, 2009, BIOGEOSCIENCES, V6, P2155     LECLAINCHE Y, 2010, GLOBAL BIOGEOCHEM CY, V24, ARTN GB3021     MALIN G, 1993, DEEP-SEA RES PT I, V40, P1487     MARANDINO CA, 2007, J GEOPHYS RES-ATMOS, V112, ARTN D03301     MARANDINO CA, 2008, GEOPHYS RES LETT, V35, ARTN L23812     MASOTTI I, 2010, BIOGEOSCIENCES DISCU, V7, P2523, DOI     10.5194/BGD-7-2523-2010     MATRAI PA, 1993, CONT SHELF RES, V13, P831     MATRAI PA, 1997, J GEOPHYS RES-OCEANS, V102, P22965     NEVITT GA, 1995, NATURE, V376, P680     PARK YH, 2008, DEEP-SEA RES PT II, V55, P566, DOI     10.1016/j.dsr2.2007.12.030     PENNINGTON JT, 2006, PROG OCEANOGR, V69, P285, DOI     10.1016/j.pocean.2006.03.012     SCARRATT MG, 2002, MAR ECOL-PROG SER, V244, P49     SCIARE J, 1999, J ATMOS CHEM, V32, P357     SIM OR, 1999, NATURE, V402, P396     SMITH WO, 2003, DEEP-SEA RES PT II, V50, P605     STEFELS J, 2007, BIOGEOCHEMISTRY, V83, P245, DOI     10.1007/s10533-007-9091-5     SUNDA WG, 2007, AQUAT SCI, V69, P341, DOI 10.1007/s00027-007-0887-0     TORTELL PD, 2009, GEOPHYS RES LETT, V36, ARTN L01603     TURNER SM, 1988, LIMNOL OCEANOGR, V33, P364     VALLINA SM, 2007, P NATL ACAD SCI USA, V104, P16004, DOI     10.1073/pnas.0700843104     VOGT M, 2008, BIOGEOSCIENCES, V5, P407     VOGT M, 2009, GEOPHYS MONOGRAPH SE, V187     VOGT M, 2010, J GEOPHYS RES-OCEANS, V115, ARTN C06021     WANG XJ, 2009, J GEOPHYS RES-OCEANS, V114, ARTN C07008     WONG CS, 2006, TELLUS B, V58, P319, DOI 10.1111/j.1600-0889.2006.00188.xMasotti, I. Belviso, S. Alvain, S. Johnson, J. E. Bates, T. S. Tortell, P. D. Kasamatsu, N. Mongin, M. Marandino, C. A. Saltzman, E. S. Moulin, C.Copernicus gesellschaft mbhGottingen&lt;/p&gt;</style></notes><auth-address><style face="normal" font="default" size="100%">&lt;p&gt;[Masotti, I.; Belviso, S.; Moulin, C.] CEA Saclay, UMR 8212, IPSL CEA CNRS UVSQ, Lab Sci Climat &amp;amp; Environm, F-91191 Gif Sur Yvette, France. [Alvain, S.] Univ Lille Nord France, ULCO LOG, CNRS, UMR 8187, F-62930 Wimereux, France. [Johnson, J. E.] Univ Washington, Joint Inst Study Atmosphere &amp;amp; Ocean, Seattle, WA 98195 USA. [Bates, T. S.] NOAA, Pacific Marine Environm Lab, Seattle, WA 98115 USA. [Tortell, P. D.] Univ British Columbia, Dept Earth &amp;amp; Ocean Sci, Vancouver, BC V5Z 1M9, Canada. [Kasamatsu, N.] Natl Inst Polar Res, Tokyo, Japan. [Mongin, M.] CSIRO Marine &amp;amp; Atmospher Res, Hobart, Tas, Australia. [Marandino, C. A.] Leibniz Inst Marine Sci, IFM GEOMAR, D-24105 Kiel, Germany. [Saltzman, E. S.] Univ Calif Irvine, Irvine, CA 92697 USA.Masotti, I, CEA Saclay, UMR 8212, IPSL CEA CNRS UVSQ, Lab Sci Climat &amp;amp; Environm, Bat 712, F-91191 Gif Sur Yvette, France.italo.masotti@lsce.ipsl.fr&lt;/p&gt;</style></auth-address></record></records></xml>