Data

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

Australian Antarctic Data Centre
HIRAWAKE, TORU
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ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rfr_id=info%3Asid%2FANDS&rft_id=info:doi10.4225/15/5a384270f2b61&rft.title=Long-term variation of surface phytoplankton chlorophyll a in the Southern Ocean during 1965-2002&rft.identifier=10.4225/15/5a384270f2b61&rft.publisher=Australian Antarctic Data Centre&rft.description=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) Year Latitude Longitude Corrected Chlorophyll a See 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).&rft.creator=HIRAWAKE, TORU &rft.date=2005&rft.coverage=northlimit=24.567; southlimit=-54.985; westlimit=100.147; eastLimit=137.95; projection=WGS84&rft.coverage=northlimit=24.567; southlimit=-54.985; westlimit=100.147; eastLimit=137.95; projection=WGS84&rft_rights=This data set conforms to the CCBY Attribution License (http://creativecommons.org/licenses/by/4.0/). Please follow instructions listed in the citation reference provided at http://data.aad.gov.au/aadc/metadata/citation.cfm?entry_id=chlorophyll_65-02 when using these data.&rft_subject=biota&rft_subject=climatologyMeteorologyAtmosphere&rft_subject=oceans&rft_subject=ANTARCTIC OSCILLATION&rft_subject=EARTH SCIENCE&rft_subject=CLIMATE INDICATORS&rft_subject=ATMOSPHERIC/OCEAN INDICATORS&rft_subject=TELECONNECTIONS&rft_subject=EARTH SCIENCE > CLIMATE INDICATORS > ATMOSPHERIC/OCEAN INDICATORS > TELECONNECTIONS > EL NINO SOUTHERN OSCILLATION (ENSO)&rft_subject=PHYTOPLANKTON&rft_subject=BIOSPHERE&rft_subject=AQUATIC ECOSYSTEMS&rft_subject=PLANKTON&rft_subject=CHLOROPHYLL&rft_subject=OCEANS&rft_subject=OCEAN CHEMISTRY&rft_subject=PIGMENTS&rft_subject=BIOMASS DYNAMICS&rft_subject=ECOLOGICAL DYNAMICS&rft_subject=ECOSYSTEM FUNCTIONS&rft_subject=CHLOROPHYLL A&rft_subject=JARE&rft_subject=SOUTHERN OCEAN&rft_subject=SHIPS&rft_subject=OCEAN > INDIAN OCEAN&rft_subject=OCEAN > SOUTHERN OCEAN&rft_subject=OCEAN > PACIFIC OCEAN&rft_subject=GEOGRAPHIC REGION > POLAR&rft_place=Hobart&rft.type=dataset&rft.language=English Access the data

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This data set conforms to the CCBY Attribution License (http://creativecommons.org/licenses/by/4.0/). Please follow instructions listed in the citation reference provided at http://data.aad.gov.au/aadc/metadata/citation.cfm?entry_id=chlorophyll_65-02 when using these data.

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These data are publicly available for download from the provided URL. A copy of some of the referenced publications is available for download by AAD staff only.

Brief description

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)
Year
Latitude
Longitude
Corrected Chlorophyll a

See 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).

Issued: 2005-08-22

Data time period: 1965-11-23 to 2002-12-08

Click to explore relationships graph

137.95,24.567 137.95,-54.985 100.147,-54.985 100.147,24.567 137.95,24.567

119.0485,-15.209

text: northlimit=24.567; southlimit=-54.985; westlimit=100.147; eastLimit=137.95; projection=WGS84

Identifiers