U.S. flag An official website of the United States government.
Official websites use .gov

A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS

A lock ( ) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.

i

Measurements



Details

  • Journal Title:
    Journal of Remote Sensing
  • Personal Author:
  • NOAA Program & Office:
    NOAA General Documents
  • Description:
    There has been a long history of interest on how (if) the absorption coefficient of “pure” fresh water ( a fw λ ) and “pure” seawater ( a sw λ ) changes with temperature ( T ), yet the impact of T reported in the literature differs significantly in the blue domain. Unlike the previous studies based on laboratory measurements, we took an approach based on ~18 years (2002–2020) of MODIS ocean color and temperature measurements in the oligotrophic oceans, along with field measured chlorophyll concentration and phytoplankton absorption coefficient, to examine the relationship between T and the total absorption coefficient ( a λ ) at 412 and 443 nm. We found that the values of a 412 and a 443 in the summer are nearly flat (slightly decreasing) for the observed T range of ~19–27 °C. Since there are no detectable changes of chlorophyll during this period, the results suggest that T has a negligible impact on a sw 412 and a sw 443 in this T range. As a complement, the impact of salinity on a fw λ was also evaluated using three independent determinations of a sw λ and a fw λ , where good agreements were found from these observations.
  • Keywords:
  • Source:
    Journal of Remote Sensing, 2021
  • DOI:
  • ISSN:
    2694-1589
  • Format:
    PDF
  • Publisher:
    American Association for the Advancement of Science (AAAS)
  • Document Type:
    Journal Article
  • License:
  • Rights Information:
    CC BY
  • Compliance:
    Library
  • Main Document Checksum:
    urn:sha-512:29b64f8d3cd7ddd26446627640b39a33ecb683cf1767bd22b9ac1abed99ad2d35f1d0825a885bb9139eead483963e34da1863833d42026d016d57969252f564f
  • Download URL:
  • File Type:
    Filetype[PDF - 1.73 MB ]
PREVIOUS
ON THIS PAGE
Details
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.
BACK TO TOP