scholarly journals Meteo-Marine Parameters from Sentinel-1 SAR Imagery: Towards Near Real-Time Services for the Baltic Sea

2018 ◽  
Vol 10 (5) ◽  
pp. 757 ◽  
Author(s):  
Sander Rikka ◽  
Andrey Pleskachevsky ◽  
Sven Jacobsen ◽  
Victor Alari ◽  
Rivo Uiboupin
Keyword(s):  
Baltic Sea ◽  
Real Time ◽  
The Baltic Sea ◽  
Sar Imagery ◽  
The Baltic

scholarly journals Operational Service for Mapping the Baltic Sea Landfast Ice Properties

2020 ◽  
Vol 12 (24) ◽  
pp. 4032
Author(s):  
Marko Mäkynen ◽  
Juha Karvonen ◽  
Bin Cheng ◽  
Mwaba Hiltunen ◽  
Patrick B. Eriksson
Keyword(s):  
Sea Ice ◽  
Baltic Sea ◽  
Prediction Models ◽  
Winter Season ◽  
Free Access ◽  
The Baltic Sea ◽  
Usable Information ◽  
Landfast Ice ◽  
Sar Imagery ◽  
The Baltic

The Baltic Sea is partly covered by sea ice in every winter season. Landfast ice (LFI) on the Baltic Sea is a place for recreational activities such as skiing and ice fishing. Over thick LFI ice roads can be established between mainland and islands to speed up transportation compared to the use of ferries. LFI also allows transportation of material to or from islands without piers for large ships. For all these activities, information on LFI extent and sea ice thickness, snow thickness and degree of ice deformation on LFI is very important. We generated new operational products for these LFI parameters based on synthetic aperture radar (SAR) imagery and existing products and prediction models on the Baltic Sea ice properties. The products are generated daily and have a 500 m pixel size. They are visualized in a web-portal titled “Baltic Sea landfast ice extent and thickness (BALFI)” which has free access. The BALFI service was started in February 2019. Before the BALFI service, information on the LFI properties in fine scale (<1 km) was not available from any single source or product. We studied the accuracy and quality of the BALFI products for the ice season 2019–2020 using ice charts and in-situ coastal ice station data. We suggest that the current products give usable information on the Baltic LFI properties for various end-users. We also identify some topics for the further development of the BALFI products.

scholarly journals Quantitative Real-Time PCR Detection of Toxic Nodularia Cyanobacteria in the Baltic Sea

2007 ◽  
Vol 73 (7) ◽  
pp. 2173-2179 ◽  
Author(s):  
Kerttu Koskenniemi ◽  
Christina Lyra ◽  
Pirjo Rajaniemi-Wacklin ◽  
Jouni Jokela ◽  
Kaarina Sivonen
Keyword(s):  
Baltic Sea ◽  
Real Time ◽  
Real Time Pcr ◽  
Pcr Primers ◽  
Gene Copy ◽  
Quantitative Real Time Pcr ◽  
The Baltic Sea ◽  
Gene Copies ◽  
Qpcr Method ◽  
The Baltic

ABSTRACT A specific quantitative real-time PCR (qPCR) method was developed for the quantification of hepatotoxin nodularin-producing Nodularia, one of the main bloom-forming cyanobacteria in the Baltic Sea. Specific PCR primers were designed for subunit F of the nodularin synthetase gene (ndaF), which encodes the NdaF subunit of the nodularin synthetase gene complex needed for nodularin production. The qPCR method was applied to water samples (a total of 120 samples) collected from the Baltic Sea in July 2004. As few as 30 ndaF gene copies ml−1 of seawater could be detected, and thus, the method was very sensitive. The ndaF gene copy numbers and nodularin concentrations were shown to correlate in the Baltic seawater, indicating the constant production of nodularin by Nodularia. This qPCR method for the ndaF gene can be used for detailed studies of Nodularia blooms and their formation. ndaF gene copies and nodularin were detected mostly in the surface water but also in deeper water layers (down to 30 m). Toxic Nodularia blooms are not only horizontally but also vertically widely distributed, and thus, the Baltic fauna is extensively exposed to nodularin.

scholarly journals Quantitative Real-Time PCR assays for species-specific detection and quantification of Baltic Sea spring bloom dinoflagellates

2019 ◽  
Author(s):  
A. M. Brink ◽  
A. Kremp ◽  
E. Gorokhova
Keyword(s):  
Baltic Sea ◽  
Real Time ◽  
Spring Bloom ◽  
Rrna Gene ◽  
The Baltic Sea ◽  
Relative Contribution ◽  
Polymerase Chain ◽  
The Baltic ◽  
Species Specific ◽  
Its1 And Its2

ABSTRACTIn the Baltic Sea, the dinoflagellates Apocalathium malmogiense, Biecheleria baltica, and Gymnodinium corollarium are important contributors to the spring bloom. However, their relative contribution to the bloom community cannot be unambiguously determined by conventional light microscopy due to lack of resolution of distinctive morphological features of the three species. Here, we describe a molecular approach based on a quantitative real-time polymerase chain reaction (qPCR) primer and probe system, targeting the ITS1 and ITS2 regions of the rRNA gene for all three species and enabling their quantification. The specificity of the method was demonstrated using monocultures of A. malmogiense, B. baltica, G. corollarium as well as three other dinoflagellate species co-occurring in the Baltic Sea during spring and validated using field-collected phytoplankton samples.

Temporal and spatial sedimentation rate variabilities in the eastern Gotland Basin, the Baltic Sea

Boreas ◽  
2002 ◽  
Vol 31 (1) ◽  
pp. 65-74 ◽  
Author(s):  
Christian Christiansen ◽  
Helmar Kunzendorf ◽  
Kay-Christian Emeis ◽  
Rudolf Endler ◽  
Ulrich Struck ◽  
...  
Keyword(s):  
Baltic Sea ◽  
Sedimentation Rate ◽  
The Baltic Sea ◽  
Gotland Basin ◽  
Temporal And Spatial ◽  
The Baltic

Russian Oil: Production and Exports

2003 ◽  
pp. 136-146
Author(s):  
K. Liuhto
Keyword(s):  
Baltic Sea ◽  
Statistical Data ◽  
Oil Production ◽  
The Baltic Sea ◽  
North West ◽  
The North ◽  
Oil Transportation ◽  
Sea Ports ◽  
The Baltic

Statistical data on reserves, production and exports of Russian oil are provided in the article. The author pays special attention to the expansion of opportunities of sea oil transportation by construction of new oil terminals in the North-West of the country and first of all the largest terminal in Murmansk. In his opinion, one of the main problems in this sphere is prevention of ecological accidents in the process of oil transportation through the Baltic sea ports.

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