17099 Obsolete - AFSC/RACE/Eco-FOCI: Chlorophyll: groundtruth data for chlorophyll fluorescence sensors on the moorings. Data Set Published / External 22352 Recruitment Processes Program Project Completed These data are part of a ocean observation study by Stabeno, Napp, and Whitledge sponsored, in part, but 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. Chlorophyll samples taken at and around the moorings were obtained as groundtruth data for chlorophyll fluorescence sensors on the moorings. See http://www.pmel.noaa.gov/foci/foci_moorings/foci_moorings.shtml for information on mooring locations, configurations, and data. Loaded by batch 3774, 12-05-2012 12:38 Theme PARR Exclusion Non-Federal Funding Theme PARR Exclusion Obsolete Data Set Theme biota chlorophyll Theme biota phaeopigments Theme biota phytoplankton Theme oceans chlorophyll Theme oceans phaeopigments Theme oceans phytoplankton Temporal Seasons Spring Temporal Seasons Summer Spatial Alaska Spatial Bristol Bay Spatial St. Lawrence Island Spatial arctic Spatial eastern Bering Sea shelf Stratum Depths upper water column Data Set None Planned Data Steward 2019 Person Bahl, Kimberly kimberly.bahl@noaa.gov 206 526 4314 Distributor 2019 Person Duffy-Anderson, Janet janet.duffy-anderson@noaa.gov Metadata Contact 2019 Person Bahl, Kimberly kimberly.bahl@noaa.gov 206 526 4314 Point of Contact 2019 Person Bahl, Kimberly kimberly.bahl@noaa.gov 206 526 4314 Ground Condition -175 -160 65 55 Range 2004-05-15 2006-04-01 Unclassified None None Data are processed using Seabird... gov.noaa.nmfs.inport:17099 Doug Turnbull 2012-12-05T12:38:01 SysAdmin InPortAdmin 2022-08-09T17:11:07 2016-05-18 Alaska Fisheries Science Center AFSC 7600 Sand Point Way N.E., Building 4 Seattle WA 98115 USA https://www.afsc.noaa.gov 0700-1700 Pacific Time 1001 Public No No 2016-05-18 1 Year 2017-05-18 Point Local surface 1.00 meters Attribute values NPRB410_Chlorophyl_final Phytoplankton pigments (chlorophyll and phaeopigment) from water bottle samples Napp, Jeffrey FOCICruise FOCI Program Cruise Number XYYZZ(X=sequential cruise number; YY= ship designation; ZZ= year) See entity type definition source Text Station Sequential Station Number See entity type definition source Integer Haul Sequential Haul Number (N.B. Increment haul number if the operation is performed within 0.5 nm of original station position) See entity type definition source Integer GearAbrv Gear Abbreviation See entity type definition source CTDB Conductivity, Temperature, Depth Instrument with Water Bottles See entity type definition source ShipCruise Ship's Convention for Cruise Name See entity type definition source Text GMTTime Greenwich Mean Time See entity type definition source 1899-12-30 00-13-00 1899-12-30 23-26-00 Time Date/Time BottomDepth Depth of Water Column (acoustically determined) See entity type definition source Integer Latitude Latitude (Decimal Degrees) See entity type definition source 56.8732 60.0332 0.0001 Real Longitude Longitude (Decimal Degrees) See entity type definition source -172.7663 -164.0382 0.0001 Real HaulComments Comments Entered By Scientist See entity type definition source Text Performance Scientists Assessment of Sample Quality See entity type definition source good no reservations about quality of sample See entity type definition source quest questionable - some reservations about quality of sample; read Haul Comments to learn why See entity type definition source fail failure during sample collection or processing - do not use these data See entity type definition source GMTDate Greenwich Mean Time Date at Time of Sample Collection See entity type definition source 2004-04-27 00-00-00 2004-10-01 00-00-00 Time Date/Time SampleDepth Depth of Sample Collection See entity type definition source Integer ChloroPerM^3 Chlorophyll a Concentration See entity type definition source 0.3634 16.2567 Micrograms per Cubic Meter Real PhaeoPigPerM^3 Phaeophorbide + Phaephytin Concentration See entity type definition source 0.1758 2.8201 Micrograms per Cubic Meter Real