05d23428-e3e8-4178-b895-3a253c853f92 Latvian Institute of Aquatic Ecology Voleru str.4 Riga LV-1007 Latvia juris.aigars@lhei.lv http://www.lhei.lv/en web site 2026-04-02T00:00:00 ISO 19115:2003/19139 1.0 WGS 1984 The concnetration of particulate matter, particulate macroelements and Chlorophyll a in the coastal waters of the Gulf of Riga, Vitrupe - Ainazi polygon. 2024-11-15 2024-12-03 05d23428-e3e8-4178-b895-3a253c853f92 The measurements of SPM, particulate TN, TC, Fe, Mn, Al and chlorophyll a, as well as light absorption at 750 nm and 380 nm were done within Estonia-Latvia transboundary project "Towards joint management of the transboundary Gauja/Koiva river basin district" for harmonization of water quality classification system for transboundary water bodies in the Gauja/Koiva river basin district and adjacent areas (in Estonia) in the Gulf of Riga." Measurements were done once in August 2012 along with underwater video observation, water transparency and CTD measurements in coastal waters in shallow part (2 - 12m) of the East coast of the Gulf of Riga. Data were used for Final report on assessment of the quality status of the transboundary water bodies (coastal, lakes, rivers) in Gauja/Koiva river basin district (2013. Kalvane I. and Veidemane K. (eds.)) Latvian Institute of Aquatic Ecology Voleru str.4 Riga LV-1007 Latvia juris.aigars@lhei.lv http://www.lhei.lv/en web site Baltic Environmental Forum, Latvia Antonijas str. 3 -8 Riga LV-1010 Latvia bef@bef.lv http://www.bef.lv web site Latvian Institute of Aquatic Ecology Voleru str.4 Riga LV-1007 Latvia juris.aigars@lhei.lv http://www.lhei.lv/en web site Oceanographic geographical features GEMET - INSPIRE themes, version 1.0 2008-06-01 geonetwork.thesaurus.external.theme.httpinspireeceuropaeutheme-theme Gulf of Riga SeaVoX salt and fresh water body gazetteer 2024-01-15 SeaVoX salt and fresh water body gazetteer Pigments Carbon, nitrogen and phosphorus Metal and metalloid concentrations Optical properties SeaDataNet Agreed Parameter Groups 2023-07-04 SeaDataNet Agreed Parameter Groups elemental analysers atomic absorption spectrometers spectrophotometers SeaDataNet device categories 2024-01-16 SeaDataNet device categories CHN elemental analyser Thermo Fisher Scientific GENESYS 10 UV-Vis spectrophotometer series SeaVoX Device Catalogue 2024-01-29 SeaVoX Device Catalogue Carbon concentrations in suspended particulate material Chlorophyll pigment concentrations in water bodies Metal concentrations in suspended particulate material Nitrogen concentrations in suspended particulate material Concentration of suspended particulate material in the water column Spectral wave data parameters SeaDataNet Parameter Discovery Vocabulary 2023-12-12 SeaDataNet Parameter Discovery Vocabulary CRUISE SUMMARY REPORT INVENTORY (CSR) 2023-10-02 self-propelled boat SeaVoX Platform Categories 2024-01-16 SeaVoX Platform Categories ICES Platform Codes 2024-01-16 ICES Platform Codes EUROPEAN DIRECTORY OF MARINE ENVIRONMENTAL RESEARCH PROJECTS (EDMERP) 2020-06-05 Delimited MEDIN data format categories 2024-01-29 MEDIN data format categories World Register of Marine Species (WORMS) 2024-02-07 SeaDataNet Measurement Periodicity Categories 2024-01-29 SeaDataNet Measurement Periodicity Categories BODC-approved data storage units (Spatial Unit) 2023-10-12 BODC-approved data storage units (Spatial Unit) Metres BODC-approved data storage units (Vertical Unit) 2023-10-12 BODC-approved data storage units (Vertical Unit) no limitations to public access Conditions for access and use apply ODC-ODbL Oceans 2012-08-16 2012-08-21 24.289669353375 24.377559978375 57.61924817151 57.866983286454 0.5 5 Delimited 1 https://cloud.emodnet-ingestion.eu/index.php/s/cQXnOXeVxQpsR4M WWW:DOWNLOAD-1.0-http--download WWW:LINK-1.0-http--link COMMISSION REGULATION (EC) No 1205/2008 of 3 December 2008 implementing Directive 2007/2/EC of the European Parliament and of the Council as regards metadata 2010-12-08 See the referenced specification false Corrigendum to INSPIRE Metadata Regulation published in the Official Journal of the European Union, L 328, page 83 2010-12-08 See the referenced specification false Commission Regulation (EU) No 1089/2010 of 23 November 2010 implementing Directive 2007/2/EC of the European Parliament and of the Council as regards interoperability of spatial data sets and services 2010-12-08 See the referenced specification false Observations were done manually from the motorboat by the specialists of the Latvian Institute of Aquatic Ecology. Water samples were taken by Van Van Dorn water sampler at 1 to 5 m depth; an integrated 5 m hose for water sampling in locations deeper than 5 m. Water samples were filtrate immediately. SPM for measurement of SPM mass in water, Fe, Mn and Al in suspended matter were concentrated on Millipore membrane filters (pore size 0.45 um). Concentration of Fe, Mn, and Al were determined after filter extraction with HNO3 (partially digestion) by AAS with flame atomization. SPM for measurements of total N and C in suspended matter were concentrated on Whatman glass fiber filters (GF/F; pore size 0.7 um). Concentration of TN and TC were determined by direct combustion elemental analyzer. SPM for chlorophyll a analyses were concentrate on Whatman glass fiber filters (GF/C; pore size 1.2 um). Extraction was done by ethanol with following light absorption (at 664 nm) measurement in extract by spectrophotometer. Measurements of light absorption at 750 nm were done in unfiltered water by spectrophotometer (light path length100 mm). Measurements of light absorption at 380 nm were done in water after filtration through Millipore membrane filters (pore size 0.45 um) by spectrophotometer (light path length 100 mm).