Repository of community practices in Ocean Research, Applications and Data/Information Management
⇒ HELCOM: Baltic Marine Environment Protection Commission: Recent submissions
Now showing items 21-40 of 42
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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 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 ... -
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 ... -
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 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 ... -
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 ... -
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 monitoring Seal abundance and distribution in the HELCOM area.
(HELCOM, Helsinki, Finland, 2018)HELCOM Recommendation 27-28/2 tasks the HELCOM SEAL Expert Group to develop and coordinate monitoring programmes to, among other things, assess the abundance and distribution, and the trends ofthese parameters of the Baltic ... -
Guidelines for sampling and determination of dissolved oxygen in seawater.
(HELCOM, Helsinki, Finland, 2018)The dissolved oxygen (DO) content in seawater is controlled by several unrelated processes including exchange with air, metabolism of plants and animals, microbial and chemical decomposition of organic matter, hydrodynamic ... -
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 monitoring of radioactive substances.
(HELCOM, Helsinki, Finland, 2020)Routine station network for regular monitoring programme is recommended as indicated in the following list and maps. Sampling frequency is once a year. Additional stations and samples are recommended, and reporting of the ... -
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 ... -
HELCOM Guidelines for monitoring continuous noise.
(HELCOM, Helsinki, Finland, 2018)Continuous anthropogenic noise may exert a significant pressure on the marine environment due to its constancy and extent over vast areas. Distant ships, wind and rain, are examples of continuous sound sources. Sound from ... -
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 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 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 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 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 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, ... -
Guideline on the determination of Perfluoroalkylated substances (PFAS) in seawater.
(HELCOM, Helsinki, Finland, 2018)Perfluorooctane sulphonic acid (PFOS), perfluorooctanoic acid (PFOA) and other per- and polyfluoroalkyl substances (PFASs) are considered global environmental contaminants. PFOS and PFOA are chemically and biologically ...
