Accumulation of suspended barite at mesopelagic depths and export production in the southern-ocean

• Main Authors: Dehairs, F, Baeyens, W, Goeyens, Leo
• Format: Article in Journal/Newspaper
• Language: English
• Published: Amer assoc advancement science 1992
• Subjects: ice edge; weddell sea; ross sea; phytoplankton; nitrogen; matter; cycle; Southern Ocean; Weddell Sea; Ross Sea; Weddell
• Online Access: https://lirias.kuleuven.be/handle/123456789/47644; http://gateway.isiknowledge.com/gateway/Gateway.cgi?&GWVersion=2&SrcAuth=INSPEC&SrcApp=PRODUCT_NAME&CKEY=DEHA1332920258SF&SrcURL=WOS_RETURN_URL&DestLinkType=FullRecord&DestApp=INSPEC&SrcDesc=RETURN_ALT_TEXT&SrcAppSID=APP_SID

The relation between the accumulation of barite (BaSO4) microcrystals in suspended matter from the mesopelagic depth region (100 to 600 meters) and the type of production in the euphotic layer (new versus recycled) was studied for different Southern Ocean environments. Considerable subsurface barite accumulated in waters characterized by maintained new production and limited grazing pressure during the growth season. On the other hand, little if any barite accumulated in areas where relatively large amounts of photosynthetically fixed carbon were transferred to the microheterotrophic community and where recycled production became predominant. status: published