Repository of community practices in Ocean Research, Applications and Data/Information Management
Browsing HELCOM Manuals and Guidelines by Issue Date
Now showing items 1-20 of 42
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Guidelines for monitoring of chlorophyll a.
(HELCOM, Helsinki, Finland, 2016)Increase in phytoplankton biomass is a direct consequence of advancing eutrophication. For monitoring purposes, phytoplankton biomass is estimated by chlorophyll a (Chl a) concentration. The amount of Chl a is not a ... -
Guidelines for sampling and determination of nitrite.
(HELCOM, Helsinki, Finland, 2016)Dissolved inorganic nitrogen is present in seawater both as nitrite, nitrate and ammonium. As a complement to the overall assessment of nutrient status, detailed information on the distribution of different species must ... -
HELCOM Guidelines for Management of Dredged Material at Sea and HELCOM Reporting Format for Management of Dredged Material at Sea . Adopted by HELCOM 36-2015 on 4 March 2015 and amended by HELCOM 41-2020 on 4 March 2020.
(HELCOM, Helsinki, Finland, 2016)Scope: 2.1 The guidelines are designed to assist Contracting Parties in the management of dredged material in ways that will prevent and eliminate pollution in accordance with Article 3 to the 1992 Helsinki Convention, ... -
Baltic Sea Clean Shipping Guide 2016 : Information for mariners on environmental and safety of navigation measures in the Baltic Sea.
(HELCOM, Helsinki, Finland, 2016)This information publication aims to give you a general overview of the regional environmental and safety of navigation measures applied in the Baltic Sea to maritime traffic. The focus is on commercial shipping which ... -
Guidelines on the determination of chlorinated hydrocarbons in sediment.
(HELCOM, Helsinki, Finland, 2017)These guidelines are based on the review from Smedes and de Boer (1994, 1998) and Eljarrat and Barceló (2009). The analysis of chlorinated hydrocarbons in sediments generally involves extraction with organic solvents, ... -
Guidelines for the determination of polycyclic aromatic hydrocarbons (PAH) in sediment.
(HELCOM, Helsinki, Finland, 2017)This Technical note provides advice on the analysis of polycyclic aromatic hydrocarbons (PAH) in total marine sediments, sieved fractions, and suspended particulate matter. The analysis of PAH compounds in sediments basically ... -
Guidelines for the determination of persistent organic compounds (POPs) in seawater.
(HELCOM, Helsinki, Finland, 2017)These guidelines concentrate on the sampling and extraction of lipophilic persistent organic pollutants from seawater and also address special aspects of the sampling matrix. Those pollutants comprise the group of polycyclic ... -
Guidelines for determination of salinity and temperature using CTD.
(HELCOM, Helsinki, Finland, 2017)Salinity Measurements based on electrical conductivity have since the 1960s replaced measurements of chlorinity. The Practical Salinity Scale of 1978 (PSS-78) presently used, has been defined to maintain a continuity ... -
Guidelines for non-indigenous species monitoring by extended Rapid Assessment Survey (eRAS).
(HELCOM, Helsinki, Finland, 2017)The human-mediated introduction and establishment of non-indigenous species (NIS) in the marine environment are of worldwide concern. The main vectors for species introduction are maritime transport by either transport of ... -
Guidelines for monitoring of water transparency (Secchi depth).
(HELCOM, Helsinki, Finland, 2017)Water transparency serves as an index for the trophic state of a water body. It reflects eutrophication through changes in the phytoplankton abundance; increase in the ambient nutrient status in the water leads to higher ... -
Guidelines for monitoring of turbidity.
(HELCOM, Helsinki, Finland, 2017)Turbidity estimates the impact of light scattering due to particles on the level of light attenuation in the water column. It is affected by total suspended solids (i.e., organic and inorganic particles) in the water, and ... -
Guidelines for sampling and determination of ammonium.
(HELCOM, Helsinki, Finland, 2017)Dissolved inorganic nitrogen is present in seawater both as nitrite, nitrate and ammonium. As a complement to the overall assessment of nutrient status, detailed information on the distribution of different species must ... -
Guidelines for sampling and determination of hydrogen sulphide (H2S) in Seawater.
(HELCOM, Helsinki, Finland, 2017)Hydrogen sulphide is a poisonous gas that readily dissolves in water. The sulphide is formed in stagnant waters, where the oxygen has been consumed by bacteria oxidizing organic matter to carbon dioxide, water, and inorganic ... -
Guidelines for sampling and determination of nitrate
(HELCOM, Helsinki, Finland, 2017)Dissolved inorganic nitrogen is present in seawater both as nitrite, nitrate and ammonium. As a complement to the overall assessment of nutrient status, detailed information on the distribution of different species must ... -
Draft guidelines for sampling and determination of total alkalinity.
(HELCOM, Helsinki, Finland, 2017)Although not listed among HELCOM Core Indicators, total alkalinity should be monitored to provide information of alterations in the carbonate buffer system, which may be induced by changing weathering processes on the ... -
Guidelines for sampling and determination of pH in seawater.
(HELCOM, Helsinki, Finland, 2017)Since ocean acidification is a growing concern, monitoring of pH is necessary for studies of acidification and its effects on the carbonate buffer system. As many important biological processes are likely to be affected ... -
Guidelines for sampling and determination of silicate.
(HELCOM, Helsinki, Finland, 2017)Silicate is introduced to the Baltic Sea as a result of natural geological processes, as opposed to nitrogen and phosphorus, which levels are affected by human activities. Although it is not listed among the HELCOM Core ... -
Draft guidelines for sampling and determination of total nitrogen.
(HELCOM, Helsinki, Finland, 2017)Total nitrogen includes all organic and inorganic forms of nitrogen, dissolved as well as suspended or particulate. The results are an estimation of the total amount of nitrogen, not only the dissolved bioavailable ... -
Guidelines for sampling and determination of total phosphorus.
(HELCOM, Helsinki, Finland, 2017)While determination of dissolved phosphate gives information on the bioavailable pool of phosphorus, an assessment of the total amount of phosphorus is also essential. Total phosphorus includes all organic and inorganic ... -
Guidelines for sampling and determination of phosphate.
(HELCOM, Helsinki, Finland, 2017)Phosphate is in many cases in the Baltic Sea the limiting factor for phytoplankton growth. Monitoring of phosphate levels is essential for evaluation of the effects of eutrophication. 1.2 Purpose and aims Monitoring of ...
