Description: The eutrophication status of the German Bight (North Sea) has been assessed the third time since 1998 according to the OSPAR-Comprehensive Procedure between 2006 and 2014. Since the 1980s nutrient discharges and atmospheric nitrogen deposition had declined significantly but chlorophyll a and nutrient concentrations remained above assessment levels inshore and in inner coastal waters, reflecting continuing eutrophication. Recently local river discharges stagnated or increased again and total nitrogen remained above a reduction target of 200 myM. Most nutrients and conversion products were imported by a coastal current, passing the German Bight. Organic matter was trapped in offshore bottom waters in the ancient Elbe valley, causing repeated annual oxygen minima (<6 mg/L) and a classification as Problem Area. Effects of national reduction measures are limited in the transit area German Bight because improvements in open coastal waters require international efforts, based on comprehensive analyses. © 2018 Elsevier Ltd. All rights reserved.
Global identifier:
Doi(
"10.60810/openumwelt-1941",
)
Origin: /Bund/UBA/openUMWELT
Tags: Eutrophierung ? Fluss ? Nährstoff ? Sauerstoff ? Elbe ? Bodenwasser ? Chlorophyll ? Gesamtstickstoff ? Küstengewässer ? Organisches Material ? Deutsche Bucht ? Klassifikation ? Tal ? Offshore ? Nordsee ? Rechte ? Sauerstoffbedarf ?
License: other-closed
Language: Englisch/English
Issued: 2018-01-01
Time ranges: 2018-01-01 - 2018-01-01
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