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Description of the 2008 oceanographic conditions on the northeast U.S. continental shelf
  • Published Date:
    2009
Filetype[PDF - 3.33 MB]


Details:
  • Corporate Authors:
    Northeast Fisheries Science Center (U.S.)
  • Series:
    Northeast Fisheries Science Center reference document ; 09-12
  • Document Type:
  • Description:
    "Hydrographic observations from 17 surveys that were conducted on the northeast continental shelf during 2008 are summarized. Contoured distributions of temperature, salinity, density stratification and anomalies are presented for six two-month time periods if coverage was sufficient. Average temperature/salinity values were calculated in five geographic regions over the northeast continental shelf: western Gulf of Maine (GOMW), eastern Gulf of Maine (GOME), Georges Bank (GBNK), northern Mid Atlantic Bight (MABN) and southern Mid Atlantic Bight (MABS). Review of the computed regional average temperature data indicate that surface temperatures were predominately warmer than the reference values in all regions. The eastern Gulf of Maine exhibited slightly colder than expected bottom temperatures for all time periods for which data were available. Regional average salinities were mostly lower, but the largest (negative) anomalies were observed in the Mid-Atlantic Bight. There were localized areas of positive salinities anomalies observed during the year, but these tended to be associated with warm core rings or the variable position of the shelf/slope front. Warmer sea surface temperatures and lower salinities contributed to a higher degree of density stratification along the outer shelf region of the Mid Atlantic Bight during the 2008 summer. The volume of shelf water in the Mid Atlantic regions was high indicating that the shelf / slope front was located further offshore. The northeast climate experienced higher than normal precipitation and slightly warmer air temperatures during 2008"--Abstract.