World Library  


Add to Book Shelf
Flag as Inappropriate
Email this Book

From the Chlorophyll A in the Surface Layer to Its Vertical Profile: a Greenland Sea Relationship for Satellite Applications : Volume 9, Issue 2 (09/04/2013)

By Cherkasheva, A.

Click here to view

Book Id: WPLBN0004020600
Format Type: PDF Article :
File Size: Pages 15
Reproduction Date: 2015

Title: From the Chlorophyll A in the Surface Layer to Its Vertical Profile: a Greenland Sea Relationship for Satellite Applications : Volume 9, Issue 2 (09/04/2013)  
Author: Cherkasheva, A.
Volume: Vol. 9, Issue 2
Language: English
Subject: Science, Ocean, Science
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Historic
Publication Date:
2013
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

Citation

APA MLA Chicago

Melsheimer, C., Bauerfeind, E., Nöthig, E., Bracher, A., & Cherkasheva, A. (2013). From the Chlorophyll A in the Surface Layer to Its Vertical Profile: a Greenland Sea Relationship for Satellite Applications : Volume 9, Issue 2 (09/04/2013). Retrieved from http://hawaiilibrary.net/


Description
Description: Alfred Wegener Institute for Polar and Marine Research, Bremerhaven, Germany. Current estimates of global marine primary production range over a factor of two. Improving these estimates requires an accurate knowledge of the chlorophyll vertical profiles, since they are the basis for most primary production models. At high latitudes, the uncertainty in primary production estimates is larger than globally, because here phytoplankton absorption shows specific characteristics due to the low-light adaptation, and in situ data and ocean colour observations are scarce. To date, studies describing the typical chlorophyll profile based on the chlorophyll in the surface layer have not included the Arctic region, or, if it was included, the dependence of the profile shape on surface concentration was neglected. The goal of our study was to derive and describe the typical Greenland Sea chlorophyll profiles, categorized according to the chlorophyll concentration in the surface layer and further monthly resolved profiles. The Greenland Sea was chosen because it is known to be one of the most productive regions of the Arctic and is among the regions in the Arctic where most chlorophyll field data are available. Our database contained 1199 chlorophyll profiles from R/Vs Polarstern and Maria S. Merian cruises combined with data from the ARCSS-PP database (Arctic primary production in situ database) for the years 1957–2010. The profiles were categorized according to their mean concentration in the surface layer, and then monthly median profiles within each category were calculated. The category with the surface layer chlorophyll (CHL) exceeding 0.7 mg C m−3 showed values gradually decreasing from April to August. A similar seasonal pattern was observed when monthly profiles were averaged over all the surface CHL concentrations. The maxima of all chlorophyll profiles moved from the greater depths to the surface from spring to late summer respectively. The profiles with the smallest surface values always showed a subsurface chlorophyll maximum with its median magnitude reaching up to three times the surface concentration. While the variability of the Greenland Sea season in April, May and June followed the global non-monthly resolved relationship of the chlorophyll profile to surface chlorophyll concentrations described by the model of Morel and Berthon (1989), it deviated significantly from the model in the other months (July–September), when the maxima of the chlorophyll are at quite different depths. The Greenland Sea dimensionless monthly median profiles intersected roughly at one common depth within each category. By applying a Gaussian fit with 0.1 mg C m−3 surface chlorophyll steps to the median monthly resolved chlorophyll profiles of the defined categories, mathematical approximations were determined. They generally reproduce the magnitude and position of the CHL maximum, resulting in an average 4% underestimation in Ctot (and 2% in rough primary production estimates) when compared to in situ estimates. These mathematical approximations can be used as the input to the satellite-based primary production models that estimate primary production in the Arctic regions.

Summary
From the chlorophyll a in the surface layer to its vertical profile: a Greenland Sea relationship for satellite applications

Excerpt
Antoine, D. and Morel, A.: Oceanic primary production: I. Adaptation of a spectral light-photosynthesis model in view of application to satellite chlorophyll observations, Global Biogeochem. Cy., 10, 43–55, 1996.; Antoine D., André J. M., and Morel, A.: Oceanic primary production: II. Estimation at global scale from satellite (Coastal Zone Color Scanner) chlorophyll, Global Biogeochem. Cy., 10, 57–69, 1996.; Arnone, R. A., Casey, B., Ko, D., Flynn, P., Carrolo, L., and Ladner, S.: Forecasting Coastal Optical Properties using Ocean Color and Coastal Circulation Models, Proc. Of SPIE Vol. 6680, 66800S, doi:10.1117/12.737201, 2007.; Behrenfeld, M. J.: Abandoning Sverdrup's Critical Depth Hypothesis on phytoplankton blooms, Ecology, 91, 977–989, 2010.; Behrenfeld M. J. and Falkowski, P. G.: Photosynthetic rates derived from satellite-based chlorophyll concentration, Limnol. Oceanogr., 42, 1–20, 1997.; Arrigo, K. R. and van Dijken, G. L.: Secular trends in Arctic Ocean net primary production, J. Geophys. Res., 16, C09011, doi:10.1029/2011JC007151, 2011.; Arrigo, K. R., Matrai, P. A., and van Dijken, G. L.: Primary productivity in the Arctic Ocean: Impacts of complex optical properties and subsurface chlorophyll maximum on large-scale estimates, J. Geophys. Res., 116, C11022, doi:10.1029/2011JC007273, 2011.; Budéus, G. and Ronski, S.: An integral view of the hydrographic development in the Greenland Sea over a decade, The Open Oceanography Journal, 3, 1874–2521, doi:10.2174/1874252100903010008, hdl:10013/epic.32547, 2009.; Carr, M.-.E., Friedrichs, M. A. M.,Schmeltz, M., Aita, M. N., Antoine, D., Arrigo, K. R., Asanuma, I., Aumont, Barber, R., Behrenfeld, M., Bidigare, R., Bustenhuis, E., Campbell, J., Ciotti, A., Dierssen, H., Dowell, M., Dunne, J., Esaias, W., Gentili, B., Gregg, W.,, Groom, Hoepffner, N., Ishizaka, J., Kameda, T., LeQuere, C., Lohrenz, S., Marra, J., Melin, F., Moore, K., Morel, A., Reddy, T. E., Ryan, J., Scardi, M., Smyth, T., Turpie, K., Tilstone, G., Waters, K., and Yamanaka, Y.: A comparison of global estimates of marine primary production from ocean color, Deep Sea Res. II, 53, 741–770, doi:10.1016/j.dsr2.2006.01.028, 2006.; Comiso, J. C.: Polar oceans from space, New York, Springer, 741-770, 2010.; Edler, L.: Recommendations on methods for marine biological studies in the Baltic Sea, Phytoplankton and chlorophyll, BMB Publ., 5, 1–38, 1979.; Eppley, R., Steward, E., Abbott, M., and Heyman, U.: Estimating ocean primary production from satellite chlorophyll: introduction to regional differences and statistics for the Southern California Bight, J. Plankton Res., 7, 57–70, 1985.; Evans, C. A. and O'Reily, J. E.: A handbook for the measurement of chlorophyll a in netplankton and nanoplankton, BIOMASS Handbook, 9, 1–14, 1987.; Gordon, H. R. and McCluney, W. R.: Estimation of the depth of sunlight penetration in the sea for remote sensing. Applied Optics, 14, 413–416, 1975.; Gordon, H. R. and Morel, A. Y.: Remote Assessment of Ocean Color for Interpretation of Satellite Visible Imagery: A review, Springer-Verlag. Berlin, p. 114, 1983.; Hill, V. J., Matrai, P. A., Olson, E., Suttles, S., Steele, M., Codispoti, L. A., and Zimmerman, R. C. Synthesis of integrated primary production in the Arctic Ocean: II. In situ and remotely sensed estimates, Prog. Oceanogr., 110, 107–125, doi:10.1016/j.pocean.2012.11.005, 2013.; Lee, Z., Weidemann, A., Kindle, J., Arnone, R., Carder, K. L., and Davis, C.: Euphotic zone depth: Its derivation and implication to ocean-color remote sensing, J. Geophys. Res., 112, C03009,

 

Click To View

Additional Books


  • Evaluation of Release-05 Grace Time-vari... (by )
  • Modeling the Effects of Size on Patch Dy... (by )
  • Distribution of Overwintering Calanus in... (by )
  • Seasonal Variability of Phytoplankton Fl... (by )
  • Residual Circulation and Freshwater Tran... (by )
  • A New Method for Continuous Measurements... (by )
  • Coastal Sea Level Response to the Tropic... (by )
  • Fine-scale Features on the Sea Surface i... (by )
  • A Chemical Ionization Mass Spectrometer ... (by )
  • Validation of the Nemo-ersem Operational... (by )
  • Statistical Trend Analysis and Extreme D... (by )
  • Measuring Air–sea Gas-exchange Velocitie... (by )
Scroll Left
Scroll Right

 



Copyright © World Library Foundation. All rights reserved. eBooks from Hawaii eBook Library are sponsored by the World Library Foundation,
a 501c(4) Member's Support Non-Profit Organization, and is NOT affiliated with any governmental agency or department.