These data are part of an ocean observation study by Stabeno, Napp, and Whitledge sponsored, in part, by the North Pacific Research Board (Project 602; http://doc.nprb.org). The grant was titled "Sentinels for Bering Sea ecosystem change." Moorings have been maintained on the southeastern Bering Sea shelf at four sites: M2 (56.9B0N, 164.1B0W) since 1995, M4 (57.9B0N, 168.9B0W) since 1996; M5 (59.9B0N, 171.7B0W) and; M8 (62.2B0N 174.7B0W) since 2004. Shipboard measurements of temperature, salinity, nutrients, chlorophyll, fluorescence and zooplankton were collected around the moorings and along the 70-m isobath on 2 cruises (2MF06, 12 April b?? 6 May; 7MF06, 25 September b?? 10 October) to groundtruth the in situ sensors on the moorings and to learn the factors that distinguish the upper water column of the central and southeastern middle shelf.

These data are part of a ocean observation study by Stabeno, Napp, and Whitledge sponsored, in part, by the North Pacific Research Board (Project 410; http://doc.nprb.org). The grant was titled "Long-term observations on the Bering Sea shelf (2004-2005): biophysical moorings at sites 2 and 4 as sentinels for ecosystem change." Moorings were maintained on the southeastern Bering Sea shelf at M2 (56.9B0N, 164.1B0W), and at M4 (57.9B0N, 168.9B0W). Shipboard measurements of temperature, salinity, nutrients, chlorophyll, fluorescence and zooplankton were collected around the moorings on two cruises (3MF04 - April 2004 and 8MF04 - September 2004) to ground truth in situ sensors on the moorings. This long-term monitoring supported major findings: (1) The timing of the spring phytoplankton bloom is determined by the presence of ice, with an early bloom occurring if ice is present after mid-March and later bloom occurring if there is no sea-ice after mid-March; (2) During the last decade, the southeastern Bering Sea shelf has undergone a marked warming (~3B0C) that is closely associated with a marked decrease of sea ice over the southeastern shelf; (3) Nutrients supply and summer salinity over the shelf has not significantly changed during the last three decades; (4) There is an indication that cold water zooplankton species (e.g Calanus marshallae ) are occurring in reduced abundance in association with the warming. While the warming over the southeastern shelf is primarily related to the reduction of ice extent, a combination of other mechanisms are important: the presence over the eastern shelf of a relatively mild air mass during winter since 2000; a shorter ice season caused by a later fall transition and/or earlier spring transition; increased flow through Unimak Pass during winter introducing warm Gulf of Alaska water onto the shelf; and a thermal feedback mechanism whereby warmer, summer ocean temperatures delay the southward advection of sea ice during winter.

Zooplankton data are abundance by taxanomic group (to species where possible), stage, size and sex. Zooplankton sorting is performed at The Polish Plankton Sorting Institute in Szcecin, Poland. The zooplankton protocol was changed in 2012 to include a wider range of taxaonomic categories for all study areas and to finer taxanomic resolution where possible. Limited biomass information is available using literature values for micrograms carbon of select copepod species. Various gears with different mesh sizes are used to asses different size classes of zooplankton including 20/60cm paired bongos, Tucker, Multinet, MOCNESS, Methot, CalVET and microzooplankton nets hung on nisken bottles.

Data collected on this cruise included the following: We conducted a juvenile fish and benthic fish prey survery in the eastern Bering Sea (61 3-meter beam trawls, 64 modified tucker epibenthic plankton sled tows, 54 van veen benthic grab collections).

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CTD profile data (97 casts) were collected in the northeast Bering Sea and Chukchi Sea from the Fishing Vessel Bristol Explorer (cruise BE1301) during the Arctic Ecosystem Integrated Survey (Arctic EIS) pelagic fish survey, August 6 to September 27, 2013. CTD casts occurred at trawl survey stations and along transactions ~15 nm apart. Northern Bering Sea (NBS), stations were from 60°N and Bering Strait; Chukchi Sea stations sat between the Bering Strait and 72.5°N. The cruise was split into 3 legs, with leg 1 sampling in the southern Chukchi Sea, leg 2 in the northern Chukchi Sea and leg 3 in the NBS. Profile data and water samples were collected by NOAA, Alaska Fisheries Science Center (AFSC) as a part of the Ecosystems & Fisheries-Oceanography Coordinated Investigations (EcoFOCI) program in collaboration with the Pacific Marine Environmental Laboratory (PMEL). Profile variables include temperature (°C), salinity, chlorophyll fluorescence (ugrams/l), oxygen concentration (umol/kg), transmission (percent), photosynthetic available radiation (PAR, microEinsteins/m^2 s) and calculated values Sigma-T (kg m-3) and oxygen percent saturation (percent). Fewer profile variables were collected on leg 1 due to failed primary CTD and use of backup that did not contain all sensors, limiting water sampling to 4 depth. The CTD issue was solved for legs 2 & 3. On leg 3 ship flooding caused damage to freezers and loss of some discrete nutrient samples and all discrete oxygen and chlorophyll samples (see included cruise report). This data set contains 1-meter-averaged water-column profile data. Profile data from CTD instruments were processed at NOAA/PMEL/EcoFOCI using standard techniques. CTD data contacts: Phyllis Stabeno, Jeanette Gann, Ryan McCabe, Calvin Mordy, Peggy Sullivan, Shaun Bell. Scientists with the National Oceanic and Atmospheric Administration (NOAA), Alaska Fisheries Science Center (AFSC); Auke Bay Laboratories Ecosystem Monitoring and Assessment (EMA); Arctic Ecosystem Integrated Survey (Arctic Eis); Pacific Marine Environmental Laboratory (PMEL) ; Ecosystems and Fisheries-Oceanography Coordinated Investigations (EcoFOCI); University of Washington, Cooperative Institute for Climate, Ocean and Ecosystem Studies (CICOES) participated. Data are in NetCDF. Longitudes are in degW.

This dataset contains zooplankton and ichthyoplankton distribution and abundance, sea surface and bottom water temperatures and salinities collected during the shelf-wide fisheries surveys for the Ecosystem Monitoring Program (EcoMon) from 1977-02-13 to 2021-11-15. The surveys are conducted 6-7 times per year over the continental shelf from Cape Hatteras, North Carolina to Cape Sable, Nova Scotia, using NOAA research ships or charter vessels. The Cape Hatteras to Cape Sable area is divided into four regions, and 30 randomly selected stations are targeted for sampling from each region. Along with the data collected from each cruise, this archival package also contains the GIS shapefiles that comprise the strata used to randomly select plankton stations in the EcoMon study area. These strata comprise 4 regions: Mid-Atlantic Bight, Southern New England, Georges Bank, and Gulf of Maine and will help the user better understand the sampling methodology. The EcoMon investigation monitors the fishery-relevant components of the Northeast Shelf ecosystem, to characterize the baseline conditions and to determine the effects of biological and physical processes on the recruitment of Northeast shelf fishes. Data from this program have supported numerous analyses documenting the seasonal and interannual variability in the distribution and abundance of the dominant zooplankton taxa on the northeast continental shelf.

These time-series data sets consist of Current Profiler data and biophysical data from moored instruments at 2 locations in Southeast Alaska in 2005 and 2006. A Cross Sound (CS-11) mooring was deployed August through November 2005 at 58.17 N, 136.57 W. In 2006 moorings were deployed in August at both Cross Sound (CS-11, 58.17 N, 136.57 W) and Chatham Strait (CH-1, 56.50 N, 134.39 W), and recovered in March of 2007. Data from these moored instruments include current speed and direction, calculated current components U and V, temperature, conductivity, salinity, pressure, water depth and calculated Sigma-T values. Instrumentation included Teledyne-RDI Long-Ranger 75khz ADCP (LRCP) and SeaBird SBE-37 (Microcat). Instruments were deployed and recovered from the Alaska Department of Fish and Game ship R/V Medeia. The cruise was funded by NOAA, EcoFOCI (Ecosystems and Fisheries-Oceanography Coordinated Investigations) and NPCREP (North Pacific Climate Regimes and Ecosystem Productivity) programs. Operations on these cruises were managed by EcoFOCI personnel from NOAA/PMEL. Mooring time series data were processed at PMEL using standard techniques. Time is recorded as UTC. Data contacts: Phyllis Stabeno, Shaun Bell, Ryan McCabe, Peggy Sullivan. Collected with participation from National Oceanic and Atmospheric Administration (NOAA), Pacific Marine Environmental Laboratory (PMEL), ; Ecosystems and Fisheries-Oceanography Coordinated Investigations (EcoFOCI); University of Washington, Cooperative Institute for Climate, Ocean, and Ecosystem Studies (CICOES). Data are in NetCDF. Longitudes are in degW.

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