i
Measurements
-
2021
-
-
Source: Journal of Remote Sensing, 2021
[PDF-1.73 MB]
Details:
-
Journal Title:Journal of Remote Sensing
-
Personal Author:
-
NOAA Program & Office:
-
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:
-
Publisher:
-
Document Type:
-
License:
-
Rights Information:CC BY
-
Compliance:Library
-
Main Document Checksum:
-
Download URL:
-
File Type:
