9293pal Palmer Station Season oct92-mar93 Second Palmer LTER field season at Palmer Station. Ocean water column observations were carried out twice a week from zodiacs over the Palmer near-shore grid. Bird observations were carried out on nearby islands. Zodiac sampling was carried out twice a week of the water column at the near-shore grid stations. The monitoring of bird populations continued for the entire field season. Weather was monitored daily. Palmer Station(64deg 46'S; 64deg 04'W), Antarctica, near-shore grid stations within a 2 mile zodiac safety limit include: st, latS(d,m), lonW(d,m), comment A, 64, 46.45, 64, 03.27, Gamage Pt. (harbor side) B, 64, 46.77, 64, 04.35, w Bonaparte Pt. C, 64, 47.30, 64, 04.35, w 3 cable rocks D, 64, 48.40, 64, 03.06, w Laggard I. E, 64, 48.90, 64, 02.43, 100 fathom pt F, 64, 48.40, 64, 04.35, tween pt G, 64, 48.00, 64, 06.00, se Spume I H, 64, 47.30, 64, 07.60, wsw Janus I I, 64, 46.50, 64, 08.00, w Litchfield I J, 64, 46.00, 64, 08.00, w Humble I The five island rookeries within a 40km2 area include: Humble Island Torgersen Island Litchfield Island Christine Island Cormorant Island Palmer Station is situated at the edge of a glacier on Anvers Island off the West coast of the Antarctic Peninsula. The biological dynamics of the ecosystem are related to the extent of the annual pack ice. Repeated sampling of physics, chemistry, biology and optics of the water column and the bird colonies within the immediate Palmer area throughout the spring and summer seasons. The near-shore sampling grid stations were located using a portable GPS unit on-board the zodiac. Three zodiac configurations were used: zodiac 1 (ROZE) - optics/ctd, surface chl , fish finder for depth zodiac 2a (WET) - chl, hplc, nutrients, productivity zodiac 2b (TRAWL) - trawl, fish finder for fish Generally the ROZE and WET zodiacs would depart together. From the ROZE conductivity-temperature and light profiles were measured and a surface sample for chlorophyll analysis was taken. From the WET zodiac water column samples at the surface and two to five other depths (often including the chlorophyll maximum) were taken. At stations B and E, 6 depths at least once a week were sampled. After the WET zodiac run, the nets and fishfinder would be loaded on the WET zodiac for trawling. Once a week an attempt was made to obtain a night trawl. Research for long-term background monitoring program includes repeated measurements of the water column made over a near-shore grid (Smith et al, 1996) and observations at bird colonies follow accepted standard methods (CCAMLR, 1992). Core measurments available two years after the season. Citation acknowledgement: "Data from the Palmer LTER data archive were supported by Office of Polar Programs, NSF (OPP-9011927)." Icecolors90, RACER, AMERIEZ, BIOMASS, AMLR, CCAMLR antarctic, southern ocean, lter, long-term, marginal ice zone, phytoplankton, bio-optics, krill, seabirds ~lter/data/9293pal/* CCAMLR, 1992. Standard Methods for Monitoring Studies. Convention for the Conservation of Antarctic Marine Living Resources Ecosystem Monitoring Program, Hobart, Tasmania, Australia. Fraser, WR, WZ Trivelpiece, BR Houston, DR Patterson, 1993. Palmer LTER: Seabird research undertaken as Part of the CCAMLR Ecosystem Monitoring Program at Palmer Station, 1992-1993. Annual report submitted to the National Marine Fisheries Service, La Jolla, CA, USA. Karl, DM, CD Winn, DVW Hebel, R Letelier, 1990. Hawaii Ocean Time-Series Program Field and Laboratory Protocols. University of Hawaii Report (ftp:128.171.154.9@/pub/hot/protocols/1142.asc) Haberman KL, RM Ross, LB Quetin, 1993: Palmer LTER: Grazing by the antarctic krill, Euphausia superba, on Nitschia sp. and Phaeocystis sp. monocultures. Antarctic Journal of the United States 28:217-219. Lascara CM, LB Quetin, RM Ross, 1993. Palmer LTER: Krill Dis- tribution and Biomass within Coastal Waters Near Palmer Station. Antarctic Journal of the United States 28:214-217. Quetin, LB, RM Ross, and KS Baker, 1993. Palmer Long-Term Ecological Research (LTER): An Overview of the 1992-1993 Season. Antarctic Journal of the United States 28:205-208. Smith, RC, JL Jones, LB Quetin, RR Ross, KS Baker, WA Kozlowski, M Vernet, WR Fraser, 1996. Palmer LTER: Annual Season Sampling on Station. Antarctic Journal of the United States (accepted). National Science Foundation, Division of Polar Programs 14jun93-ksb 07dec93-ksb 25nov96-ksb Karen S. Baker Robin M. Ross Langdon B. Quetin

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