Alkenone Paleothermometry in Coastal Settings: Evaluating the Potential for Highly Resolved Time Series of Sea Surface Temperature
Advanced Search
Select up to three search categories and corresponding keywords using the fields to the right. Refer to the Help section for more detailed instructions.

Search our Collections & Repository

For very narrow results

When looking for a specific result

Best used for discovery & interchangable words

Recommended to be used in conjunction with other fields

Dates

to

Document Data
Library
People
Clear All
Clear All

For additional assistance using the Custom Query please check out our Help Page

The NOAA IR serves as an archival repository of NOAA-published products including scientific findings, journal articles, guidelines, recommendations, or other information authored or co-authored by NOAA or funded partners. As a repository, the NOAA IR retains documents in their original published format to ensure public access to scientific information.
i

Alkenone Paleothermometry in Coastal Settings: Evaluating the Potential for Highly Resolved Time Series of Sea Surface Temperature

Filetype[PDF-5.09 MB]


Select the Download button to view the document
This document is over 5mb in size and cannot be previewed
Details Supporting Files You May Also Like

Details:

  • Journal Title:
    Paleoceanography and Paleoclimatology
  • Personal Author:
  • NOAA Program & Office:
    OAR (Oceanic and Atmospheric Research)
  • Description:
    The unsaturation ratios of alkenones have been applied widely to reconstruct pelagic sea surface temperatures (SSTs). However, applications to costal settings have been hampered by the effects of salinity and nutrient dynamics. Here we present a 4.5‐year‐long record of alkenones in water column particulate organic matter from sites in Narragansett Bay (RI, USA) spanning wide ranges in salinity and nutrients, and a 300‐year alkenone record from two Narragansett Bay sediment cores. Particulate organic matter results suggest that there are two distinct alkenone producing populations. One is a widespread population that blooms in summer (July–September) and displays alkenones typical of Group III producers—the basis for the widely applied marine Uk’37 temperature index. The other population is confined to brackish waters in the Providence River during spring salinity minima and displays alkenone profiles consistent with Group I production—the first detection of Group I in a brackish nonlacustrine environment. The sedimentary alkenone profiles consist of only Group III alkenone distributions, allowing for the reconstruction of a 300‐year‐long record of Narragansett Bay SST. Comparison of the most recent 100 years of this reconstruction with local and regional instrumental SST records shows excellent agreement, confirming a regional pattern of SST rise in the coastal northeastern United States that exceeds global or hemispheric rates. Group III alkenone production in coastal settings may be common and may open the way to high resolution local and regional SST reconstruction.
  • Keywords:
  • Source:
    Paleoceanography and Paleoclimatology, 34(2), 164-181
  • DOI:
  • ISSN:
    2572-4517;2572-4525;
  • Format:
    PDF
  • Publisher:
    American Geophysical Union (AGU)
  • Document Type:
    Journal Article
  • Funding:
    Grant no. NA10OAR4170076
  • Rights Information:
    Other
  • Compliance:
    Library
  • Main Document Checksum:
  • Download URL:
  • File Type:

You May Also Like

Checkout today's featured content at

Version 3.27.1