Akihisa S. Otsuki

Kenji Saito

Masaki Honda

Mitsuo Fukuchi

Mutsuo Ichinomiya

Toru Hirawake

National Institute of Polar Research Repository

JARE Data Reports, No. 300 (Marine Biology 36), October 2007 Chlorophyll a concentration of phytoplankton during the cruise of the 47th Japanese Antarctic Research Expedition in 2005-2006 Masaki Honda1), Mutsuo Ichinomiya2), Kenji Saito3),Akihisa S. Otsuki4), Toru Hirawake5) and Mitsuo Fukuchi4)1) Environmental Science Research Laboratory, Central Reserch Institute of Electric Power Industry, 1646, Abiko, Abiko 270-1194 2) Institute of Environmental Sciences, 1-7, Ienomae, Obuchi,  Rokkasho-mura, Kamikit-gun, Aomori 039-3212 3) National Institute of Genetics Research Organization of Information and Systems, 1111, Yata, Mishima 411-8540 4) Kanagawa Prefectural Fisheries Technology Center, Sagami Bay  Experimental Station, 1-2-1, Hayakawa, Odawara, Kanagawa 250-0021 5) Graduate School of Fisheries Science, Hokkaido University, 3-1-1, Minato-cho, Hakodate 041-8611 1. Introduction   This is a report on the phytoplankton chlorophyll a concentration on the cruise of the icebreaker Shirase during the 47th Japanese Antarctic Research Expedition (JARE) in the 2005-2006 austral summer.  Chlorophyll a concentration of phytoplankton was measured in two series: (1) spatial variation of chlorophyll a in the surface water along the cruise track, and (2) vertical profile of chlorophyll a in the Indian Ocean sector of the Southern Ocean. 2. Materials and methods   Surface seawater was sampled routinely four times a day by pumping up through the hull in cruising and with a plastic bucket in stoppage. Subsurface water was collected with a Van-Dorn bottle.  Seawater samples of 100-500 ml were filtered onto a glass fiber filter (Whatman, GF/F).  The filter was immediately soaked in N,N-dimethylformamide (Suzuki and Ishimaru, 1990), and pigments were extracted.  The concentrations of chlorophyll a and pheopigments were determined fluorometrically (Parsons et al., 1984) with a fluorometer (Turner Design, 10-AU).  The fluorometer was calibrated against a chlorophyll a standard (Sigma Chemical Co.) using a spectrophotometer and the value of specific absorption coefficient obtained by Porra et al. (1989). － 1－M. Honda et al. 3. Data   A map of the sampling stations during JARE-47 cruise is illustrated in Fig. 1.  Chlorophyll a and pheopigment concentrations in sea surface and subsurface water are shown in Tables 1 and 2, respectively.  The data in this report are available on digital media (see section 5). 4. Scientists on board  Sampling and analysis were mainly carried out by M. Honda, M. Ichinomiya and K. Saito. 5. Data policy   Before using the data for publication or presentation, please request permission in writing.  Inquiries should be addressed to: Mitsuo Fukuchi, Professor National Institute of Polar Research 9-10, Kaga 1-chome, Itabashi-ku, Tokyo 173-8515, Japan Phone: +81-3-3962-4722 Facsimile: +81-3-3962-4759 E-mail: fukuchi@nipr.ac.jp Requests for digital data should also be placed with Prof. Fukuchi.  Acknowledgments   We thank to all the members of the JARE-47 for their support and help. We also wish to thank officers and crew members of the icebreaker Shirase.ReferencesParsons, T. R., Maita, Y. and Lalli, C. M. (1984): A Manual of Chemical and Biological Methods for Seawater Analysis. Oxford, Pergamon Press, 173 p. Porra, R. J., Thompson, W. A. and Kriedemann, P. E. (1989): Determination of accurate extinction coefficients and simultaneous equations for assaying chlorophyll a and b extracted with four different solvents: verification of the concentration of chlorophyll standards by atomic absorption spectroscopy. Biochim. Biophys. Acta, 975, 384-394. Suzuki, R. and Ishimaru, T. (1990): An improved method for the determination of phytoplankton chlorophyll using N, N-dimethylformamide. J. Oceanogr. Soc. Jpn., 46, 190-194. － 2－－ 3－Fig. 1.  Map showing the sites of sampling stations during JARE-47 in 2005/06. Open  circles indicate surface water sampling. Solid squares are stations for vertical  water sampling. － 4－Pump Chl.a Pheo.Sample# /Bucket Date(GMT) Time(GMT) Degrees Minutes Degrees Minutes (mg m-3) (mg m-3)Fremantle Australia1 Pump 2005/12/3 23:12 35 32.3 S 112 54.2 E 0.26 0.072 Pump 2005/12/4 3:43 36 15.5 S 112 22.1 E 0.50 0.143 Pump 2005/12/4 8:15 36 54.1 S 111 51.3 E 0.48 0.194 Pump 2005/12/4 11:16 37 17.0 S 111 33.8 E 0.46 0.185 Pump 2005/12/5 0:00 39 16.1 S 110 28.4 E 0.44 0.176 Pump 2005/12/5 4:05 39 56.3 S 110 2.5 E 0.40 0.077 Pump 2005/12/5 9:00 40 43.6 S 109 43.0 E 0.55 0.108 Pump 2005/12/5 13:00 41 26.3 S 109 32.6 E 0.48 0.059 Pump 2005/12/6 0:03 43 33.4 S 109 28.9 E 0.46 0.1410 Pump 2005/12/6 4:12 44 22.4 S 109 25.0 E 0.59 0.2011 Pump 2005/12/6 9:09 44 35.5 S 109 25.8 E 0.52 0.1612 Pump 2005/12/6 13:24 45 21.5 S 109 48.6 E 1.07 0.1913 Pump 2005/12/6 23:58 48 13.0 S 109 36.6 E 0.29 0.0414 Pump 2005/12/7 4:00 49 14.6 S 109 40.4 E 0.88 0.2015 Pump 2005/12/7 9:06 49 49.6 S 109 45.4 E 0.42 0.0016 Pump 2005/12/7 13:30 51 2.8 S 109 55.3 E 0.47 0.0217 Pump 2005/12/8 0:03 53 51.8 S 109 58.4 E 0.43 -0.0218 Pump 2005/12/8 3:56 54 55.5 S 109 50.7 E 0.35 -0.0219 Pump 2005/12/8 10:02 55 37.0 S 109 31.3 E 0.30 -0.0120 Pump 2005/12/8 13:16 56 24.3 S 109 21.4 E 0.28 -0.0221 Pump 2005/12/9 0:42 58 55.7 S 108 45.0 E 0.23 -0.0222 Pump 2005/12/9 3:55 59 31.1 S 108 39.5 E 0.29 -0.0223 Pump 2005/12/9 9:00 59 55.6 S 108 26.3 E 0.47 ND24 Pump 2005/12/9 13:03 60 9.1 S 106 37.7 E 0.36 0.0025 Pump 2005/12/10 0:22 60 46.1 S 100 25.4 E 0.46 0.0626 Pump 2005/12/10 4:00 60 54.1 S 98 25.9 E 0.57 ND27 Pump 2005/12/10 9:09 61 5.3 S 95 34.4 E 0.76 0.0328 Pump 2005/12/10 12:58 61 17.0 S 93 25.2 E 0.70 0.0129 Pump 2005/12/11 1:00 61 47.4 S 86 35.2 E 1.72 ND30 Pump 2005/12/11 5:00 61 47.2 S 84 24.8 E 0.30 0.0031 Pump 2005/12/11 10:11 61 20.7 S 83 23.6 E 0.36 -0.0132 Pump 2005/12/13 10:59 62 52.7 S 56 27.0 E 0.31 0.0133 Bucket 2005/12/14 19:24 65 30.49 S 38 49.43 E 0.13 0.0334 Bucket 2005/12/15 1:08 66 10.82 S 38 20.01 E 0.18 -0.0135 Bucket 2005/12/15 5:29 66 50.65 S 37 49.96 E 0.22 0.0136 Bucket 2005/12/15 10:37 67 40.65 S 38 7.96 E 0.29 0.0037 Bucket 2005/12/22 11:25 68 59.26 S 39 1.59 E 0.17 0.00Syowa Station, Antarctica38 Bucket 2006/2/14 7:30 68 30.95 S 39 32.68 E 0.61 0.0539 Bucket 2006/2/14 11:55 67 31.34 S 38 10.24 E 0.20 0.0140 Bucket 2006/2/15 8:04 66 50.42 S 37 49.24 E 0.08 0.0041 Bucket 2006/2/15 11:54 66 10.28 S 38 20.33 E 0.07 0.0042 Pump 2006/2/15 12:51 66 2.39 S 38 27.11 E 0.08 0.0043 Pump 2006/2/15 17:00 65 30.10 S 38 49.16 E 0.09 ND44 Pump 2006/2/16 3:57 65 31.75 S 38 47.89 E 0.10 0.0045 Bucket 2006/2/16 6:03 65 29.47 S 38 47.36 E 0.09 0.00Latitude LongitudeTable 1.  Chlorophyll a and pheopigment concentrations of surface water during JARE-47.  ND indicates losses of data due to mistake of analytical operation. － 5－Pump Chl.a Pheo.Sample# /Bucket Date(GMT) Time(GMT) Degrees Minutes Degrees Minutes (mg m-3) (mg m-3)46 Pump 2006/2/16 7:51 65 26.28 S 38 59.42 E 0.09 0.0047 Pump 2006/2/16 13:01 64 42.98 S 40 49.57 E 0.10 0.0048 Pump 2006/2/16 17:00 64 8.66 S 42 11.96 E 0.12 0.0049 Pump 2006/2/17 4:00 65 16.66 S 42 59.61 E 0.22 0.0050 Pump 2006/2/17 8:03 65 55.28 S 42 59.39 E 0.20 0.0151 Pump 2006/2/17 13:00 66 7.31 S 43 19.16 E 0.18 0.0152 Pump 2006/2/17 17:00 65 31.77 S 43 20.06 E 0.20 0.0153 Pump 2006/2/18 4:00 65 51.21 S 43 19.99 E 0.13 0.0054 Pump 2006/2/18 8:00 64 29.64 S 43 39.65 E 0.12 0.0055 Pump 2006/2/18 12:56 65 29.16 S 43 40.05 E 0.17 0.0056 Pump 2006/2/18 17:00 66 19.42 S 43 40.00 E 0.19 0.0157 Pump 2006/2/24 12:58 62 56.75 S 49 46.16 E 0.17 0.0058 Pump 2006/2/24 17:00 62 12.41 S 50 6.34 E 0.26 0.0059 Pump 2006/2/25 4:16 61 16.82 S 51 51.26 E 0.28 0.0160 Pump 2006/2/25 8:07 61 37.92 S 53 0.89 E 0.25 0.0261 Pump 2006/2/25 12:56 62 6.44 S 54 37.20 E 0.25 0.0162 Pump 2006/2/25 16:52 62 30.63 S 56 1.57 E 0.21 0.0063 Pump 2006/2/26 2:23 63 33.70 S 59 46.17 E 0.19 0.0164 Pump 2006/2/26 7:05 63 36.88 S 60 8.70 E 0.18 0.0165 Pump 2006/2/26 11:55 64 9.52 S 61 53.00 E 0.20 0.0166 Pump 2006/2/26 16:00 64 37.90 S 63 33.25 E 0.18 0.0167 Pump 2006/2/27 3:00 64 28.50 S 67 58.68 E 0.18 0.0168 Pump 2006/2/27 7:08 64 13.39 S 69 27.86 E 0.20 0.0269 Pump 2006/2/27 12:00 63 55.41 S 69 56.46 E 0.17 0.0170 Pump 2006/2/27 15:54 64 0.01 S 71 40.65 E 0.35 0.0071 Pump 2006/2/28 1:47 63 47.95 S 76 27.84 E 0.55 0.0572 Pump 2006/2/28 6:54 63 36.83 S 78 37.91 E 0.42 0.0073 Pump 2006/2/28 11:24 63 25.90 S 78 55.05 E 0.32 0.0374 Pump 2006/2/28 15:00 62 48.19 S 79 11.49 E 0.31 0.0175 Pump 2006/3/1 10:57 61 46.83 S 79 14.19 E 0.56 -0.0276 Pump 2006/3/1 14:53 62 33.43 S 78 4.49 E 0.52 0.0377 Pump 2006/3/5 11:00 64 52.01 S 80 56.00 E 0.42 0.0478 Pump 2006/3/5 14:58 64 43.03 S 82 14.26 E 0.42 0.0579 Pump 2006/3/6 1:50 64 18.79 S 85 43.42 E 0.45 0.0580 Pump 2006/3/6 5:51 64 14.26 S 87 0.25 E 0.63 0.0981 Pump 2006/3/6 11:00 63 57.73 S 88 33.00 E 0.69 0.0382 Pump 2006/3/6 15:00 63 49.46 S 89 50.11 E 0.35 0.0483 Pump 2006/3/7 1:00 63 41.02 S 90 19.65 E 0.43 0.0484 Pump 2006/3/7 5:37 63 33.12 S 91 38.36 E 0.30 0.0385 Pump 2006/3/7 10:00 63 26.91 S 91 43.59 E 0.49 0.0286 Pump 2006/3/7 14:00 63 22.13 S 93 31.62 E 0.26 0.0587 Pump 2006/3/8 0:58 63 17.63 S 98 26.16 E 0.27 0.0388 Pump 2006/3/8 4:50 63 21.82 S 100 10.01 E 0.35 0.0489 Pump 2006/3/8 10:00 63 18.94 S 101 13.41 E 0.37 0.0590 Pump 2006/3/8 14:02 63 15.47 S 103 26.60 E 0.23 0.0391 Pump 2006/3/9 0:00 63 29.53 S 108 34.77 E 0.20 0.0292 Pump 2006/3/9 4:14 63 46.80 S 110 29.87 E 0.25 0.00Latitude Longitude－ 6－Pump Chl.a Pheo.Sample# /Bucket Date(GMT) Time(GMT) Degrees Minutes Degrees Minutes (mg m-3) (mg m-3)93 Pump 2006/3/9 8:58 63 54.33 S 111 12.12 E 0.26 0.0094 Pump 2006/3/9 13:00 63 44.23 S 113 9.55 E 0.49 0.0095 Pump 2006/3/10 0:00 63 37.76 S 118 25.63 E 0.15 0.0196 Pump 2006/3/10 3:49 63 56.66 S 120 7.54 E 0.19 0.0197 Pump 2006/3/10 9:00 63 58.12 S 121 28.07 E 0.18 0.0198 Pump 2006/3/10 13:00 63 54.34 S 123 30.02 E 0.17 0.0199 Pump 2006/3/10 23:00 63 57.04 S 128 50.27 E 0.46 0.04100 Pump 2006/3/11 2:58 63 58.67 S 130 33.57 E 0.55 0.03101 Pump 2006/3/11 8:00 63 59.99 S 131 33.67 E 0.39 -0.01102 Pump 2006/3/11 12:00 63 59.44 S 133 25.98 E 0.24 0.01103 Pump 2006/3/11 22:00 64 29.12 S 137 47.23 E 1.06 0.09104 Pump 2006/3/12 2:00 64 8.10 S 139 24.81 E 0.37 0.02105 Pump 2006/3/12 7:04 63 54.51 S 140 4.13 E 0.30 0.04106 Pump 2006/3/12 11:00 63 50.65 S 141 44.87 E 0.53 0.04107 Pump 2006/3/12 22:00 63 43.99 S 145 1.63 E 0.42 0.05108 Pump 2006/3/13 2:06 63 45.86 S 146 17.88 E 0.43 0.02109 Pump 2006/3/13 7:17 63 54.43 S 146 52.75 E 0.41 0.02110 Pump 2006/3/13 10:57 63 9.92 S 147 28.87 E 0.28 0.03111 Pump 2006/3/13 21:39 61 10.51 S 149 14.04 E 0.21 0.01112 Pump 2006/3/14 1:04 60 37.38 S 149 45.51 E 0.20 0.02113 Pump 2006/3/14 6:00 60 13.48 S 150 8.11 E 0.19 0.00114 Pump 2006/3/14 10:04 59 26.61 S 150 18.59 E 0.22 0.05115 Pump 2006/3/14 21:00 57 27.60 S 150 20.77 E 0.20 0.01116 Pump 2006/3/15 1:10 56 43.78 S 150 27.62 E 0.18 0.01117 Pump 2006/3/15 6:40 56 24.33 S 150 52.84 E 0.11 0.02118 Pump 2006/3/15 10:00 55 46.63 S 150 30.24 E 0.25 0.09119 Pump 2006/3/15 22:00 52 49.22 S 150 34.78 E 0.18 0.02120 Pump 2006/3/16 1:00 52 6.66 S 150 38.09 E 0.23 0.05121 Pump 2006/3/16 6:05 51 34.17 S 150 47.83 E 0.27 0.07122 Pump 2006/3/16 10:00 50 27.54 S 150 37.80 E 0.30 0.06123 Pump 2006/3/16 20:57 47 21.46 S 150 35.71 E 0.65 0.22124 Pump 2006/3/17 1:03 46 14.46 S 150 36.60 E 0.56 0.26125 Pump 2006/3/17 6:15 45 40.68 S 150 29.55 E 1.07 0.50126 Pump 2006/3/17 10:02 44 48.79 S 150 37.42 E 0.93 0.37127 Pump 2006/3/17 21:00 42 22.11 S 150 52.64 E 1.17 0.52128 Pump 2006/3/18 1:00 41 45.95 S 150 58.31 E 0.61 0.19129 Pump 2006/3/18 6:00 40 49.41 S 151 8.01 E 0.24 0.09130 Pump 2006/3/18 9:55 40 9.43 S 151 8.56 E 1.25 0.82131 Pump 2006/3/18 20:55 38 10.49 S 151 21.48 E 0.31 0.09132 Pump 2006/3/19 1:05 37 30.29 S 151 26.22 E 0.17 0.07133 Pump 2006/3/19 6:00 36 33.46 S 151 31.51 E 0.12 0.04134 Pump 2006/3/19 9:55 35 48.22 S 151 34.77 E 0.12 0.03Sydney, AustraliaLatitude Longitude－ 7－Depth Chl.a Pheo.Station Date Position (m) (mg m-3) (mg m-3)1 2005/12/5   40㰛  07.72 S 0 0.41 0.09109㰛  52.13 E 10 ND1 ND120 ND1ND130 ND1ND150 ND1ND175 ND1ND1100 ND1ND1125 ND1ND1150 ND1ND1200 ND1ND12 2005/12/6 44㰛 41.56 S 0 0.57 0.15109㰛 24.33 E 10 0.54 0.1520 0.49 0.1530 0.51 0.1550 0.53 0.1775 0.64 0.16100 0.57 0.17125 0.31 0.18150 0.20 0.12200 0.12 0.083 2005/12/7 49㰛 44.51 S 0 0.35 0.02109㰛 40.44 E 10 0.49 0.0420 0.48 -0.0230 0.46 0.0650 0.53 0.0875 0.50 0.20100 0.34 0.29125 0.15 0.25150 0.08 0.17200 0.05 0.144 2005/12/8 55㰛 19.84 S 0 0.38 ND2109㰛 34.86 E 10 0.46 -0.0220 0.55 -0.0230 0.51 0.0050 0.77 0.0675 0.65 0.10100 0.40 0.10125 0.15 0.08150 0.05 0.06200 0.02 0.035 2005/12/9 59㰛 53.76 S 0 0.46 ND2108㰛 33.07 E 10 0.45 -0.0120 0.44 0.0230 0.58 -0.0550 0.65 -0.0275 0.38 0.10100 0.34 0.13125 0.11 0.03150 ND1ND1200 0.01 0.02Depth Chl.a Pheo.Station Date Position (m) (mg m-3) (mg m-3)6 2006/2/24 63㰛 40.10 S 0 0.21 0.0149㰛 41.10 E 10 ND1 ND120 ND1ND130 ND1ND150 ND1ND175 ND1ND1100 ND1ND1125 ND1ND1150 ND1ND1200 ND1ND17 2006/2/26 63㰛 39.52 S 0 0.20 0.0160㰛 10.70 E 10 0.17 0.0120 0.18 0.0030 0.18 0.0150 0.18 0.0175 0.27 0.06100 0.31 0.13125 0.18 0.08150 0.10 0.06200 0.01 0.028 2006/2/27 63㰛 56.01 S 0 0.21 0.0169㰛 57.92 E 10 0.18 0.0120 0.19 0.0130 0.21 0.0050 0.25 -0.0375 0.31 0.10100 0.26 0.16125 0.17 0.09150 0.10 0.05200 0.03 0.039 2006/2/28 63㰛 31.08 S 0 0.35 0.0079㰛 04.11 E 10 0.36 0.0020 0.35 -0.0230 0.31 0.0250 0.35 0.1275 0.42 0.21100 0.27 0.16125 0.14 0.07150 0.08 0.06200 0.03 0.04Trap 2006/3/1 61㰛 17.71 S 0 0.52 0.0380㰛 02.61 E 10 0.59 0.0420 0.48 0.0430 0.50 0.0450 0.38 0.0575 1.82 0.19100 0.28 0.09125 0.15 0.06150 0.06 0.04200 0.03 0.03Table 2.  Vertical profile of chlorophyll a and pheopigment concentrations during JARE-47.  ND1 indicates water samplings were cancelled due to rough weather condition or trouble  of water sampler. ND2 indicates losses of data due to mistake of analytical operation.－ 8－Depth Chl.a Pheo.Station Date Position (m) (mg m-3) (mg m-3)10 2006/3/7 63㰛 26.92 S 0 0.49 0.0591㰛 35.06 E 10 0.49 0.0520 0.54 0.1230 0.58 0.1450 0.59 0.0875 0.33 0.16100 0.19 0.12125 0.09 0.07150 0.06 0.04200 0.02 0.0211 2006/3/8 63㰛 20.37 S 0 0.24 0.06101㰛 05.96 E 10 0.25 0.0320 0.24 0.0430 0.28 0.0350 0.41 0.0875 0.61 0.18100 0.39 0.11125 0.15 0.08150 0.09 0.09200 0.02 0.0312 2006/3/9 63㰛 51.86 S 0 0.30 0.02111㰛 09.43 E 10 0.25 0.0120 0.24 0.0130 0.26 -0.0150 0.27 0.0175 0.70 0.16100 0.41 -0.09125 0.09 0.06150 0.02 0.04200 0.01 0.0213 2006/3/10 63㰛 57.58 S 0 0.19 0.01121㰛 10.29 E 10 0.18 0.0120 0.18 0.0230 0.19 0.0250 0.22 0.0275 0.23 0.11100 0.23 0.07125 0.29 0.07150 0.16 0.04200 0.02 0.0214 2006/3/11 64㰛 00.25 S 0 0.33 -0.01131㰛 14.76 E 10 0.33 0.0120 0.34 -0.0230 0.33 0.0450 0.34 0.0375 0.25 0.09100 0.12 0.07125 0.08 0.05150 0.07 0.04200 0.04 0.03Depth Chl.a Pheo.Station Date Position (m) (mg m-3) (mg m-3)15 2006/3/12 63㰛 56.65 S 0 0.37 0.01140㰛 12.73 E 10 1.07 0.1020 1.07 0.0530 1.05 0.1250 1.05 0.0875 0.35 0.08100 0.10 0.05125 0.05 0.04150 0.03 0.03200 0.02 0.0216 2006/3/13 63㰛 57.80 S 0 0.43 0.01146㰛 45.39 E 10 0.38 0.0120 0.38 0.0430 0.39 0.0350 0.42 0.0775 0.13 0.05100 0.05 0.03125 0.03 0.02150 0.01 0.02200 0.01 0.0217 2006/3/14 60㰛 17.99 S 0 0.20 0.00150㰛 00.50 E 10 0.19 0.0220 0.20 0.0130 0.20 0.0150 0.22 0.0375 0.20 0.05100 0.18 0.07125 0.09 0.03150 0.02 0.01200 0.01 0.0118 2006/3/15 56㰛 25.19 S 0 0.10 0.02150㰛 31.05 E 10 0.14 0.0120 0.13 0.0230 0.12 0.0150 0.14 0.0275 0.17 0.03100 0.31 0.12125 0.27 0.09150 0.14 0.06200 0.01 0.0219 2006/3/16 51㰛 36.21 S 0 0.28 0.07150㰛 40.30 E 10 0.30 0.0720 0.31 0.0830 0.32 0.0950 0.33 0.1075 0.31 0.13100 0.31 0.12125 0.28 0.13150 0.22 0.11200 0.01 0.0220 2006/3/17 45㰛 44.13 S 0 0.99 0.38150㰛 35.15 E 10 0.75 0.3320 0.74 0.3130 0.73 0.3450 0.78 0.3475 0.41 0.28100 0.17 0.14125 0.05 0.05150 0.02 0.03200 0.01 0.03

Chlorophyll a Concentration of Phytoplankton during the Cruise of the 47th Japanese Antarctic Research Expedition in 2005-2006

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Chlorophyll a Concentration of Phytoplankton during the Cruise of the 47th Japanese Antarctic Research Expedition in 2005-2006

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