headerpos: 9353
 
 
  Estonian Journal of Earth Sciences

ISSN 1736-7557 (electronic)  ISSN 1736-4728 (print)
An international scientific journal

Formerly: Proceedings of the Estonian Academy of Sciences, Geology
Published since 1952

Estonian Journal of Earth Sciences

ISSN 1736-7557 (electronic)  ISSN 1736-4728 (print)
An international scientific journal

Formerly: Proceedings of the Estonian Academy of Sciences, Geology
Published since 1952

Publisher
Journal Information
» Editorial Board
» Editorial Policy
» Article Publication Charges
» Archival Policy
» Copyright and Licensing Policy
Guidelines for Authors
» Instructions to Authors
Guidelines for Reviewers
» Review Form
Open Access
List of Issues
» 2019
» 2018
» 2017
» 2016
» 2015
» 2014
» 2013
» 2012
» 2011
Vol. 60, Issue 4
Vol. 60, Issue 3
Vol. 60, Issue 2
Vol. 60, Issue 1
» 2010
» 2009
» 2008
» 2007
» Back issues (full texts)
  in Google
» Back issues (full texts)
  in Google Ecology
» Back issues in ETERA
Keemia. Geoloogia
» ETERA_scan
Subscription Information
Internet Links
Support & Contact
Publisher
» Other Journals
» Staff

Optical investigations of CDOM-rich coastal waters in Pärnu Bay; pp. 102–112

(Full article in PDF format) doi: 10.3176/earth.2011.2.04


Authors

Birgot Paavel, Helgi Arst, Liisa Metsamaa, Kaire Toming, Anu Reinart

Abstract

Pärnu Bay in the Eastern Baltic Sea was chosen for studying the spatial-temporal variability of water parameters as an optically complex and semi-enclosed coastal area. The water properties of Pärnu Bay are influenced by the town of Pärnu with its 70 000 inhabitants and by the high inflow from the Pärnu River. The in situ database was collected during the ice-free period of 2006–2007 (11 sampling stations, 10 series of field trips). According to the results, the main factor influencing the light attenuation in the water was coloured dissolved organic matter (CDOM) which overshadows the relationships between the radiation characteristics and organic/inorganic particles. In April and May, when the freshwater discharge of the Pärnu River was highest, the values of aCDOM(380) were between 4.6 and 31.8 m–1, while in September they varied only within 2.52–10.2 m–1. The concentrations of chlorophyll a (including its metabolite phaeophytin a) generally ranged from 4 to 12 mg m–3 but during algal blooms they rapidly increased to 31.8 mg m–3. The temporal and spatial irregularity of suspended matter concentrations was caused by the loading of unpacked peat at the Pärnu River mouth as well as by undulation and ship traffic in Pärnu Bay. MODIS level 1 data with 250 m resolution were used for illustrative comparison of spatial and temporal variations in the water properties in Pärnu Bay and the Gulf of Riga. An attempt to perform the quantitative analysis with the purpose of estimating the concentrations of different optically significant substances separately gave statistically incorrect results.

Keywords

coastal waters, underwater light field, diffuse attenuation coefficient, optically active substances, remote sensing.

References

Arst , H. 2003. Optical Properties and Remote Sensing of Multicomponental Water Bodies. Springer & Praxis-Publishing , Chichester , UK , 231 pp.

Arst , H. , Kutser , T. , Laesson , L. & Lukk , T. 1993. Optical measurements in Pärnu Bay. Proceedings of the Estonian Academy of Sciences , Biology , Ecology , 3 , 27–37.

Arst , H. , Kutser , T. , Laesson , L. & Lukk , T. 1994. Estimation of the quality of Pärnu Bay water by means of optical methods. In Proceedings of 18th Conference Baltic Oceanographers , St. Petersburg , 1 , pp. 90–100. St. Petersburg.

Arst , H. , Erm , A. , Reinart , A. , Sipelgas , L. & Herlevi , A. 2002. Calculating irradiance penetration into water bodies from the measured beam attenuation coefficient II: Application of improved model to different types of lakes. Nordic Hydrology , 33 , 207–226.

Austin , R. W. & Petzold , T. J. 1981. The determination of the diffuse attenuation coefficient of sea water using the coastal zone color scanner. In Oceanography from Space (Gower , J. F. R. , ed.) , pp. 239–256. Plenum Press.

BERNET. 2000: Aquatic Monitoring and Assessment. Volume I , Synthesis. BERNET Theme Report. Fyn County , Odense , Denmark , 50 pp. http://www.dwaf.gov.za/projects/ eutrophi­cation/Website%20Survey/Baltic/ WG_Report_5_vol_I.pdf [accessed 21 March 2011].

Darecki , M. & Stramski , D. 2004. An evaluation of MODIS and SeaWiFS bio-optical algorithms in the Baltic Sea. Remote Sensing of Environment , 89 , 326–350.
doi:10.1016/j.rse.2003.10.012

Dera , J. 1992. Marine Physics. PWN , Warszawa and Elsevier , Amsterdam , 516 pp.

Doerffer , R. & Schiller , H. 2008. Algorithm Theoretical Basis Document: MERIS – Lake Water Algorithm for BEAM. http://www.brockmann-consult.de/beam-wiki/download/attachments/1900548/ATBD_
lake_water_RD20080610.pdf?version=1
[accessed 18 March 2011].

[ESS] Environmental Sciences Section. 1993. ESS Method 340.2: Total Suspended Solids , Mass Balance (Dried at 103–105 °C) , Volatile Suspended Solids (Ignited at 550 °C). Environmental Sciences Section , pp. 3-189–3-192.

[ISO] ISO TC 147/SC 2. 1992 (E). ISO 10260:1992 , Water Quality – Measurement of Biochemical Parameters –Spectrometric Determination of the Chlorophyll-a Concentration. Geneva , Switzerland , ISO , 6 pp.

Kirk , J. T. O. 1994. Light and Photosynthesis in Aquatic Ecosystems. Cambridge University Press , 509 pp.
doi:10.1017/CBO9780511623370

Kratzer , S. , Brockmann , C. & Moore , G. 2008. Using MERIS full resolution data to monitor coastal waters – a case study from Himmerfjärden , a fjord-like bay in the northwestern Baltic Sea. Remote Sensing Environment , 112(5) , 198–199.

Kutser , T. , Paavel , B. , Metsamaa , L. & Vahtmäe , E. 2009. Mapping coloured dissolved organic matter concentration in coastal waters. International Journal of Remote Sensing , 30(22) , 5843–5849.
doi:10.1080/01431160902744837

Mueller , J. L. 2000. SeaWiFS algorithm for the diffuse attenuation coefficient , K(490) , using water-leaving radiances at 490 and 555 nm. In SeaWiFS Postlaunch Calibration and Validation Analyses , Part 3 (NASA TM-2000-206892 , ed.) , pp. 24–27. Greenbelt , MD: NASA GSFC.

Platt , T. & Sathyendranath , S. 1988. Ocean primary production. Estimation by remote sensing at local and regional scales. Science , 241 , 1613–1620.
doi:10.1126/science.241.4873.1613

Sipelgas , L. , Arst , H. , Kallio , K. , Oja , P. & Soomere , T. 2003. Optical properties of dissolved organic matter in Finnish and Estonian lakes. Nordic Hydrology , 34(4) , 361–386.

Suursaar , Ü. & Tenson , J. 1998. Hydrochemical regime and productivity of the Pärnu Bay in 1968–1996. EMI Report Series , 9 , 91–117.

Tervisekaitseinspektsioon. 2009. Pärnu keskranna suplusvee profiil [Bathing Water Quality at the Beach of Pärnu Keskrand] , 36 pp. http://www.terviseamet.ee/fileadmin/dok/ Keskkonnatervis/vesi/suplus/Profiilid/parnu_rand_profiil.pdf [in Estonian; accessed 21 March 2011].
 
Back

Current Issue: Vol. 68, Issue 3, 2019




Publishing schedule:

No. 1: 20 March
No. 2: 20 June
No. 3: 20 September
No. 4: 20 December