Long-term variation of surface phytoplankton chlorophyll a in the Southern Ocean during 1965-2002

The variation in the phytoplankton biomass over a decadal time scale, and its relationship with the Antarctic Circumpolar Wave (ACW) and climate change, has been poorly interpreted because of the limited satellite chlorophylla (chl a) data compared with the physical parameters from satellite. We analysed a long-term chl a dataset along the Japanese Antarctic Research Expedition (JARE) cruise tracks since 1965 to investigate inter-annual variation of phytoplankton biomass. In the Southern Ocean, increasing trends of chl a and the spreading of higher chl a area to the north with 3-7 year cycles were found. Although relationships between the decadal change in chl a and climate change such as variation of sea ice extent and the El Nino are still obscure, large variation of primary production in proportion to the chl a is implied.The chl a concentration of sea surface water has been measured routinely on board the icebreakers Fuji and Shirase during almost every cruise of the JARE.The download file contains chlorophyll a data collected from ship tracks on JARE voyages between 1965 and 2002.The field in this dataset are:Date (local time)YearLatitudeLongitudeCorrected Chlorophyll aSee the attached paper for more details.The publications on the data collected during the 1965-1976 and 1988-1993 cruises are listed in Fukuchi [1980] and Suzuki and Fukuchi [1997], respectively. For data on the 1977-1985 and 1994-1997 cruises, see [Kanda and Fukuchi, 1979; Fukuchi and Tamura, 1982; Tanimura, 1981; Watanabe and Nakajima, 1983; Ino and Fukuchi, 1984; Sasaki, 1984; Hamada et al., 1985; Fukuda et al., 1986; Hattori and Fukuchi, 1988; Midorikawa et al., 2000]. Data post 1998-2002 cruises is in Hirawake and Fukuchi [2004]. Data from the 1986-1987 will be published in the JARE data report of digital media, including all cruise data.Auxiliary Material for paper 2004GL021394 Long-term variation of surface phytoplankton chlorophyll a in the Southern Ocean during 1965-2002. Toru Hirawake, Tsuneo Odate and Mitsuo Fukuchi (National Institute of Polar Research, Tokyo) Geophys. Res. Lett., Vol (Num), doi:10.1029/2004GL021394 All of the chl a data have been reported in the publications of the National Institute of Polar Research (NIPR).

浮游植物生物量在十年时间尺度上的变化及其与南极绕极波（ACW）和气候变化的关系，由于卫星叶绿素a（chl a）数据相较于卫星物理参数数据有限，一直未得到充分解释。我们分析了1965年以来日本南极研究探险队（JARE）航线沿线的长期叶绿素a数据集，以研究浮游植物生物量的年际变化。在南大洋，发现叶绿素a呈上升趋势，且高叶绿素a区域以3-7年周期向北方扩展。尽管叶绿素a的十年变化与气候变化（如海冰范围变化和厄尔尼诺现象）之间的关系尚不明确，但初级生产力的大幅变化与叶绿素a存在比例关系这一点已被暗示。

在日本南极研究探险队（JARE）几乎每次航行期间，均在破冰船‘富士’号和‘白濑’号上对海水表层的叶绿素a浓度进行常规测量。

下载文件包含1965年至2002年期间日本南极研究探险队（JARE）航线上收集的叶绿素a数据。

该数据集包含以下字段：日期（当地时间）、年份、纬度、经度、校正叶绿素a。

更多细节请参见附带论文。

1965-1976年和1988-1993年航行期间收集的数据相关出版物分别列于Fukuchi [1980]和Suzuki and Fukuchi [1997]中。1977-1985年及1994-1997年航行的数据请参见[Kanda and Fukuchi, 1979; Fukuchi and Tamura, 1982; Tanimura, 1981; Watanabe and Nakajima, 1983; Ino and Fukuchi, 1984; Sasaki, 1984; Hamada et al., 1985; Fukuda et al., 1986; Hattori and Fukuchi, 1988; Midorikawa et al., 2000]。1998-2002年航行后的数据集见Hirawake and Fukuchi [2004]。1986-1987年的数据将在日本南极研究探险队（JARE）的数字媒体数据报告中发布，包含所有航行数据。

论文2004GL021394《1965-2002年南大洋表层浮游植物叶绿素a的长期变化》的辅助材料。作者：Toru Hirawake、Tsuneo Odate和Mitsuo Fukuchi（东京国立极地研究所），发表于《地球物理研究快报》（Geophys. Res. Lett.），卷（期），doi:10.1029/2004GL021394。所有叶绿素a数据均已在国立极地研究所（NIPR）的出版物中报道。