Thirteen moorings sites throughout the northeastern Chukchi Sea shelf were occupied in various combinations for eight field years, 2008-2016. Two separate taut line moorings were deployed at most sites. The primary mooring employed at all sites deployed a Teledyne RDI Acoustic Doppler Current Profiler (ADCP) to measure water and sea ice velocities. Except at the locations over Hanna Shoals, 2011-2012, a second mooring deployed an Ice Profiling Sonar (IPS) instrument, manufactured by ASL Environmental Sciences Inc. (ASL), to measure ice keel depths and wave diagnostics, and a Sea Bird Electronics 37-SM CT sensor to measure water temperature and conductivity (and thus derive salinity). Moorings were deployed during the ice-free season, then recovered and redeployed in subsequent years. Data at the Crackerjack mooring location was collected until 2016 because though recovery was intended for 2015, weather delayed it until the next year. Data collection was conducted by Olgoonik Fairweather LLC (Fairweather) of Anchorage, Alaska, and ASL, Victoria, B.C., Canada. Fairweather provided logistical support to ASL field personnel during oceanographic mooring recovery and redeployment, and ASL was contracted to collect and analyze data. UAF processing was limited to assembling the data into this data submission. NCEI received the data in text and MS Excel formats. The latter have been exported to CSV text.

From August 2010 – September 2012, six moorings (BC1 inshore to BC6 offshore), spaced ~13 km apart, spanned the head of Barrow Canyon, Chukchi Sea, Alaska. Each mooring contained an upward looking 300 or 600 kHz Teledyne ADCP and a temperature/conductivity/pressure (T/C/P) recorder (Seabird SBE-37 or SBE-19). Moorings BC-2 through BC-5 included bottom tracking for measuring ice keel depths and ice drift. Bottom-tracking was inactive on BC-1 and BC-6 because these included directional wave firmware. The T/C/P and ADCP were housed in a float situated ~4 m above bottom. BC1, the mooring nearest to the coast, was deployed in a water depth of 31 m with its instruments mounted 1-m above the bottom in a SeaSpider frame. The compact mooring design minimized damage from nearshore ice keels that can exceed 25 m depth. After recovering the array in 2012, we deployed a single mooring (BC2) in 3 succeeding years.

This is an archive of data of 47 distinct XBT casts taken at 41 locations in the Mendeleev Ridge and Chukchi Borderland region of the Arctic between 22nd August and 22nd September 2002, from the from the USCGC Polar Star (cruise CBL2002, also called AWS-02-II) as part of an NSF sponsored project.

Bering Strait Mooring Cruise Underway Data 2022 This is an archive of underway data from the Bering Strait mooring cruise on the research vessel Norseman II, from Nome to Nome, 8th-19th September 2022. The cruise collected 3 types of underway data: meteorological (including wind velocity, air temperature and pressure and relative humidity); thermosalinograph (temperature and conductivity); and vessel-mounted ADCP (with bottom tracking). For full parameter list, see data file headers. To avoid sediment clogging of the thermosalinograph, that system was turned off while the ship was in Port Clarence during a large storm (~16-18 September 2022).

These data are part of a multi-year baseline environmental studies data set collected as part of the permitting process prior to drilling exploration wells. The objectives of the Chukchi Sea Environmental Baseline Studies Program are: 1. To provide data for pre-exploration and development-related activities 2. To provide data for permit applications 3. To provide input to planning of future operations and associated mitigation 4. To provide additional baseline data that can be used to assess and measure the potential environmental effects of offshore oil and gas exploration and development in the northeastern Chukchi Sea. These data were submitted under Annex 1 of the Memorandum of Understanding between NOAA and the oil companies (NOAA Agreement NOS-MOA-2011-080).

Surface current velocities representative of the upper 2 m of the water column were collected in the northeastern Chukchi Sea using high-frequency radar systems during the ice free seasons of 2012 - 2014. Hourly data from August through October of each year are included at a spatial resolution of 6 km.

This is an archive of underway meteorological and TSG data from the Bering Strait mooring cruise on the research vessel Norseman II, from Nome to Nome (AK), 4th-14th July 2023. This cruise collected the following underway data: - meteorological data - thermosalinograph data - ship's ADCP data (not included in this dataset) For an overview of previous and on-going Bering Strait mooring work and suggested references please see the Documentation. For queries, please contact: Rebecca Woodgate woodgate@uw.edu (206) 221-3268 Polar Science Center, Applied Physics Lab, University of Washington 1013 NE 40th, Seattle, WA 98105-6698 USA ------------------------------------------------------------------------------ Meta data ========= 1) Platform: Research vessel NorsemanII, operated by Support Vessels of Alaska, SVA. 2) Project title: Bering Strait 3) Data collection dates: 4th-14th July 2023 for meteorological data 4th-14th July 2023 for thermosalinograph (TSG) data (note start of salinity data 5th July 2023, 22:15 local - 6th July 2023, 06:15GMT) 4th-14th July 2023 for ADCP data 4) PI: Rebecca Woodgate (woodgate@uw.edu) 5) Data collection method: Underway sampling from built-in ship's sensors 6) Data calibration method: No special calibration. = meteorological data are unaltered from operational output of the sensors = thermosalinograph data use the latest available, pre-cruise calibrations (Dec 2016) 7)Instrumentation used: = meteorological data, using ship-mounted sensors - Airmar 220WX Weather caster 153, installed 2021 = thermosalinograph data from sea water intake 3.4m below water line (slightly - SBE21 Temperature and Conductivity sensor, in the engine room - SBE38 Temperature sensor, near the seawater intake = hull mounted RDI 300kHz Workhorse Mariner ADCP (SN 19355) with bottom tracking, mounted 3m below water line. 8)Quality Control procedures: Data provided as recorded, with no detailed quality control. 9) Data format: = meteorological data - ASCII, format given in individual headers = thermosalinograph - ASCII, format given in individual header (.hdr, .hex and .XMLCON files also provided) 10) Data Collection problems: = meteorological data - this is the third year this met system has been in use on the Norseman 2. A comparison between met data from the previous system and ERA, JRA and NCEP data, suggested that the 2021 data from the new system were too high (~2m/s) for wind speed, too low (~2degC)for temperature, and too low (~2hPa) for air pressure. That was based on a calibration done under less than ideal conditions. The system was recalibrated before the 2022 cruise, in the anticipation that would improve the data, however it has not yet been possible to make the same comparison to the ERA, JRA, and NCEP data to see if this has indeed fixed the issue. = thermosalinograph - raw Julian Day from Seasave system subject to GPS Roll over error. This is corrected in the data archived. - seachest was erroneously isolated from seawater intake at start of cruise. This was corrected 6th July 0615 GMT. Seachest data before this time are not measuring in situ water, and thus values have been set to a dummy value of 9999. This problem did not affect intake temperature. - raw depth data were frequently noisy. Flyers over 62m have been linearly interpolated from neighboring points 11) Other related data sets: = these data were taken on a mooring deployment cruise, which placed 3 moorings (A2-23, A3-23, A4-23) in the Bering Strait region. These moorings are part of a long-term time-series started in 1990 = prior mooring cruises to the region have collected underway data. For an overview, see PI web site in the Documentation. 12) Conditions of use: Data freely available. Please, as a courtesy, contact the PIs before using these data and cite project as using citations given in the Documentation section. 13) Data qualifications or warnings = See data collection issues 14) Grant numbers Sponsorship for the cruise came from - National

This dataset includes a reference baseline used by the Digital Shoreline Analysis System (DSAS) to calculate rate-of-change statistics for the exposed north coast of Alaska coastal region between Point Barrow and Icy Cape for the time period 1947 to 2012. This baseline layer serves as the starting point for all transects cast by the DSAS application and can be used to establish measurement points used to calculate shoreline-change rates.