Inferring Florida Current Volume Transport From Satellite Altimetry
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.
 
 
Inferring Florida Current Volume Transport From Satellite Altimetry
  • Published Date:

    2020

  • Source:
    Journal of Geophysical Research: Oceans, 125(12)


Public Access Version Available on: May 16, 2021, 12:00 AM information icon
Please check back on the date listed above.
Details:
  • Description:
    The nearly four-decades-long quasi-continuous daily measurements of the Florida Current (FC) volume transport with a submarine cable at about 27°N represents the longest climate record of a boundary current in existence. Given the extremely high utility of this time series for monitoring the Atlantic meridional overturning circulation, as well as for improving understanding and prediction of the regional weather, climate phenomena, coastal sea-level, and ecosystem dynamics, efforts are underway to establish a suitable backup observing system in case the cable becomes inoperable in the future. This study explores the utility of along-track satellite altimetry measurements since 1993 as a potential cable backup by establishing the relationship between the cross-stream sea surface height gradients and the FC volume transport derived from cable measurements and ship sections. We find that despite the lower temporal resolution, satellite altimetry can indeed serve as a decent but limited backup observing system. The FC transport inferred from satellite altimetry captures about 60% of the variability observed in the concurrent cable estimates, and the estimated error bars for the altimetry-derived transport are larger than those of the cable transport (2.1 Sv vs. 1.5 Sv). We nevertheless demonstrate that satellite altimetry reproduces the seasonal, intra-seasonal, and inter-annual variability of the FC transport fairly well, as well as large transport anomalies during extreme weather events, such as tropical storms and hurricanes. The altimetry-derived transport can be provided in near-real time and serve the need to fill in data gaps in the cable record and assess its quality over time.
  • Document Type:
  • Place as Subject:
  • Main Document Checksum:
  • File Type:
  • Supporting Files:
    No Additional Files
No Related Documents.

You May Also Like: