Assessing Secchi and Photic Zone Depth in the Baltic Sea from Satellite Data

Susanne Kratzer; Bertil Håkansson; Charlotte Sahlin

doi:10.1579/0044-7447-32.8.577

How to translate text using browser tools

1 December 2003 Assessing Secchi and Photic Zone Depth in the Baltic Sea from Satellite Data

Susanne Kratzer, Bertil Håkansson, Charlotte Sahlin

Author Affiliations +

Susanne Kratzer,^* Bertil Håkansson,^** Charlotte Sahlin^***

^*Susanne Kratzer is a researcher in the marine remote sensing group at the Department of Physical Geography and Quaternary Geology, Stockholm University. She studied biology in Germany (Philipps-Univeristät Marburg and Universität Bremen) and did her Master thesis (Diplomarbeit) in marine biology 1994 in the School of Ocean Sciences in Menai Bridge, North Wales. In autumn 2000, she defended her PhD in biological oceanography at the University of Wales, Bangor. She is specialized in the bio-optical properties of coastal waters and has been working at Stockholm University since January 1997. Her field of interest concerns ocean optics, optical modeling, and monitoring of algal blooms using optical and remote sensing methods. She has been managing a number of remote sensing projects. Her address: Department of Physical Geography and Quaternary Geology, Stockholm University, SE-106 91 Stockholm, Sweden. kratzer@natgeo.su.se
^**Bertil Håkansson is Head of the Oceanographic Unit at SMHI in Göteborg. His main interests are optical and radar remote sensing, and physical oceanography. During his associated professorship at the Department of Physical Geography and Quaternary Geology he was the leader of the marine project ‘Remote Sensing for the Environment-Methods for detection of changes in aquatic ecosystems and monitoring of algal blooms (RESE 5)’. His address: Swedish Meteorological and Hydrological Institute, Nya Varvet 31, SE-426 71 Västra Frölunda, Sweden. bertil.hakansson@smhi.se
^***Charlotte Sahlin is an undergraduate student in biology and earth sciences at the Department of Physical Geography and Quaternary Geology, Stockholm University. She is currently writing her thesis for a BSc in physical geography with emphasis on marine optics. Her main interests are environmental as well as ecological applications. Her address: Department of Physical Geography and Quaternary Geology, Stockholm University, SE-106 91 Stockholm, Sweden. charlotte.sahlin@natgeo.su.se

AMBIO: A J. of the Human Environment, 32(8):577-585 (2003). https://doi.org/10.1579/0044-7447-32.8.577

ARTICLE
FIGURES & TABLES
REFERENCES
CITED BY
DOWNLOAD PAPER SAVE TO MY LIBRARY

PERSONAL SIGN IN
Full access may be available with your subscription

Password Forgot your password?

Show

Remember Email on this computer

Remember Password

No BioOne Digital Library account? Create an account
or Access Institutional Sign In via Shibboleth or OpenAthens

PURCHASE THIS CONTENT

PURCHASE SINGLE ARTICLE

Price: ADD TO CART

Includes PDF & HTML, when available

This article is only available to subscribers.
It is not available for individual sale.

Access to the requested content is limited to institutions that have purchased or subscribe to this BioOne eBook Collection. You are receiving this notice because your organization may not have this eBook access.*

*Shibboleth/Open Athens users-please sign in to access your institution's subscriptions.

Additional information about institution subscriptions can be found here

This will count as one of your downloads.

You will have access to both the presentation and article (if available).

DOWNLOAD NOW

This content is available for download via your institution's subscription. To access this item, please sign in to your personal account.

Password Forgot your password?

Show

Remember Email on this computer

Remember Password

No BioOne Digital Library account? Create an account

My Library

You currently do not have any folders to save your paper to! Create a new folder below.

Abstract

Long-term trends in the Secchi depth of the Baltic Sea have been interpreted in terms of eutrophication (1, 2). The spectral attenuation coefficient K_d (490) can be estimated from remote sensing data (3). Given the empirical and theoretical relationships between diffuse attenuation and Secchi depth, it is therefore possible to estimate the trophic state from remote sensing data. This paper considers relationships among remotely sensed and in-water measured K_d (490), and Secchi depth data obtained during dedicated sea-truthing campaigns in the eastern Baltic Proper in 1999 (4) and in the western Baltic Proper/Himmerfjärden area during 2001 and 2002. In-water measurements are used to establish the relationship between the PAR and the spectral attenuation coefficient in the Baltic Sea via regression analysis. The analysis showed that in the area of investigation K_d (490) is about 1.48 times higher than K_d (PAR). This relationship is then used to define the link between the photic zone depth and the remote sensing optical depth, K_d (490)⁻¹. The results show that the depth of the euphotic zone is about 6.8 times K_d (490)⁻¹. The regression analysis between K_d (PAR) and Secchi depth confirmed previous work that K_d (PAR) is about 1.7 of the inverse Secchi depth. Furthermore, an in-water algorithm between Secchi depth and K_d (490) is used to simulate a Secchi depth map of the Baltic Sea from SeaWiFS K_d (490) data. This map is verified against sea-truthing data. K_d (490) data derived from satellite is compared to in situ K_d (490), and the sources of error are discussed.

Citation Download Citation

Susanne Kratzer, Bertil Håkansson, and Charlotte Sahlin "Assessing Secchi and Photic Zone Depth in the Baltic Sea from Satellite Data," AMBIO: A Journal of the Human Environment 32(8), 577-585, (1 December 2003). https://doi.org/10.1579/0044-7447-32.8.577

Published: 1 December 2003

ACCESS THE FULL ARTICLE

PERSONAL SIGN IN
Full access may be available with your subscription

Password Forgot your password?

Show

Remember Email on this computer

Remember Password

No BioOne Digital Library account? Create an account
or Access Institutional Sign In via Shibboleth or OpenAthens

PURCHASE THIS CONTENT

PURCHASE SINGLE ARTICLE

This article is only available to subscribers.
It is not available for individual sale.

JOURNAL ARTICLE
9 PAGES

This article is only available to subscribers.
It is not available for individual sale.

+ SAVE TO MY LIBRARY

GET CITATION

My Library

You currently do not have any folders to save your paper to! Create a new folder below.

Folder Name

Folder Description

< Previous Article

Next Article >

ARTICLE SOURCE

AMBIO: A Journal of the Human Environment

AMBIO: A Journal of the Human Environment
Vol. 32 • No. 8
December 2003

RIGHTS & PERMISSIONS

Get copyright permission

Subscribe to BioOne Complete

Receive erratum alerts for this article

Receive alerts when this article is cited

Susanne Kratzer, Bertil Håkansson, Charlotte Sahlin "Assessing Secchi and Photic Zone Depth in the Baltic Sea from Satellite Data," AMBIO: A Journal of the Human Environment, 32(8), 577-585, (1 December 2003)

Include:

Citation Only

Citation & Abstract

Format:

RIS

EndNote

BibTex

KEYWORDS/PHRASES

PUBLICATION TITLE:

COLLECTION:

PUBLICATION YEARS