The University of Southampton
University of Southampton Institutional Repository

Ocean colour signature of climate change

Ocean colour signature of climate change
Ocean colour signature of climate change
Monitoring changes in marine phytoplankton is important as they form the foundation of the marine food web and are crucial in the carbon cycle. Often Chlorophyll-a (Chl-a) is used to track changes in phytoplankton, since there are global, regular satellite-derived estimates. However, satellite sensors do not measure Chl-a directly. Instead, Chl-a is estimated from remote sensing reflectance (RRS): the ratio of upwelling radiance to the downwelling irradiance at the ocean’s surface. Using a model, we show that RRS in the blue-green spectrum is likely to have a stronger and earlier climate-change-driven signal than Chl-a. This is because RRS has lower natural variability and integrates not only changes to in-water Chl-a, but also alterations in other optically important constituents. Phytoplankton community structure, which strongly affects ocean optics, is likely to show one of the clearest and most rapid signatures of changes to the base of the marine ecosystem.
Dutkiewicz, Stephanie
a704ddd3-bd6c-4f4a-ba0c-f6420c9c3b3b
Hickman, Anna
a99786c6-65e6-48c8-8b58-0d3b5608be92
Jahn, Oliver
a9d6758c-c0a0-45d4-ac90-1b6726957fe5
Henson, Stephanie
d6532e17-a65b-4d7b-9ee3-755ecb565c19
Beaulieu, Claudie
13ae2c11-ebfe-48d9-bda9-122cd013c021
Monier, Erwan
7f1f43ec-8045-4d30-8675-6c5282ee3817
Dutkiewicz, Stephanie
a704ddd3-bd6c-4f4a-ba0c-f6420c9c3b3b
Hickman, Anna
a99786c6-65e6-48c8-8b58-0d3b5608be92
Jahn, Oliver
a9d6758c-c0a0-45d4-ac90-1b6726957fe5
Henson, Stephanie
d6532e17-a65b-4d7b-9ee3-755ecb565c19
Beaulieu, Claudie
13ae2c11-ebfe-48d9-bda9-122cd013c021
Monier, Erwan
7f1f43ec-8045-4d30-8675-6c5282ee3817

Dutkiewicz, Stephanie, Hickman, Anna, Jahn, Oliver, Henson, Stephanie, Beaulieu, Claudie and Monier, Erwan (2019) Ocean colour signature of climate change. Nature Communications, 10. (doi:10.1038/s41467-019-08457-x).

Record type: Article

Abstract

Monitoring changes in marine phytoplankton is important as they form the foundation of the marine food web and are crucial in the carbon cycle. Often Chlorophyll-a (Chl-a) is used to track changes in phytoplankton, since there are global, regular satellite-derived estimates. However, satellite sensors do not measure Chl-a directly. Instead, Chl-a is estimated from remote sensing reflectance (RRS): the ratio of upwelling radiance to the downwelling irradiance at the ocean’s surface. Using a model, we show that RRS in the blue-green spectrum is likely to have a stronger and earlier climate-change-driven signal than Chl-a. This is because RRS has lower natural variability and integrates not only changes to in-water Chl-a, but also alterations in other optically important constituents. Phytoplankton community structure, which strongly affects ocean optics, is likely to show one of the clearest and most rapid signatures of changes to the base of the marine ecosystem.

Text
s41467-019-08457-x - Version of Record
Available under License Creative Commons Attribution.
Download (5MB)

More information

Accepted/In Press date: 14 January 2019
e-pub ahead of print date: 4 February 2019
Published date: 4 February 2019

Identifiers

Local EPrints ID: 428259
URI: https://eprints.soton.ac.uk/id/eprint/428259
PURE UUID: 4585c4e9-cd1d-4e94-9f2d-95c4753f4675
ORCID for Anna Hickman: ORCID iD orcid.org/0000-0002-2774-3934

Catalogue record

Date deposited: 19 Feb 2019 17:30
Last modified: 10 Dec 2019 01:37

Export record

Altmetrics

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of https://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×