Vertical distribution of primary production and chlorophyll a in the Kara Sea

Content Provider	Semantic Scholar
Author	Demidov, Andrey B. Mosharov, Sergey A.
Copyright Year	2015
Abstract	On the basis of data obtained during three ecosystem expeditions in the Kara Sea, the vertical variability of the primary production (PP) and chlorophyll a (Chl) in autumn was studied. The Chl maximum was detected mainly on the surface (Chl0). A homogenous Chl distribution in the euphotic layer (1% photo-synthetically available radiation) and a nearly linear decrease in the Chl concentration below this layer were observed in waters with Chl0 values of 0.1–0.5 mg/m3. In waters with Chl0 > 0.5 mg/m3, the Chl concentration in the studied layer decreased linearly or exponentially. The subsurface Chl maximum (SCM) was registered weekly and was detected mostly in waters with a Chl0 content of 0.1–0.5 mg/m3. The SCM formation in the Kara Sea was consistent with the general patterns for the World Ocean. Water-column stability, the content of biogenic elements, and the level of subsurface irradiance had an approximately equal effect on SCM formation. The contribution of the SCM to the depth-integrated PP varied from 1 to 27%. The parameterization of vertical profiles of Chl was performed in order to be used in depth-integrated PP models. The Chl maximum on the surface and the negligible SCM facilitate the estimation of depth-integrated PP on the basis of satellite data and the use of vertical-resolution models.
Starting Page	521
Ending Page	534
Page Count	14
File Format	PDF HTM / HTML
DOI	10.1134/S0001437015040025
Volume Number	55
Alternate Webpage(s)	https://page-one.springer.com/pdf/preview/10.1134/S0001437015040025
Alternate Webpage(s)	https://doi.org/10.1134/S0001437015040025
Journal	Oceanology
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article