Time series of biogeochemical and biological water-column data from open and deep-sea areas of the Greek Seas. The dataset includes historical data, as well as data collected within the framework of the CLIMPACT I and II projects using sediment traps.

The data refer to fifteen-day and monthly measurements of sinking particulate matter in the marine areas of the northern Aegean, Cretan, Ionian Seas and the Levantine/northeastern Mediterranean. The collection instruments were PPS3/3 Technicap sediment traps with collection areas of 0.125 m² and 12 receiving cups. The locations and corresponding depths of the trap deployments for the different areas are as follows: Historical biogeochemical flux data for the time period 2015: A) Northern Aegean Sea (station M2, Athos Basin): 39°58.16′ N, 24°43.48′ E; d...

Field samples were collected biweekly from a coastal site in Agios Kosmas, over a 26-year period between November 1988 and April 2015, as well as, with gaps, from June 2015 to June 2018.

Samples for phytoplankton pigments in the water column were selected at 3 discrete points/stations in the Cretan Sea, during an oceanographic cruise conducted in April 2025 under the CLIMPACT project. Data include phytoplankton pigments analyses from 6 discrete depths at each station. Samples were taken with Niskin bottles and initially processed on board, while finally processed and analysed via HPLC method at HCMR Crete.

Zooplankton was collected at 10 stations in the epipelagic zone from 200 m up to the surface layer by vertical hauls (0.5m s−1) of a WP-2 standard net (Hydrobios) with 200 μm mesh size. The nets were carefully rinsed and the samples were halved, on board with a Folsom splitter. The first half was used for dry mass biomass determination and the other half was preserved in a seawater sodium tetraborate buffered formaldehyde solution (4% final concentration) for later determination of zooplankton composition and abundance. This data collection was funded by ...

This dataset contains blue carbon data from monospecific Posidonia oceanica meadows in the South Aegean Sea, including the Saronikos Gulf, the Cyclades Archipelago, the Dodecanese Archipelago and Crete Island. The dataset includes information from 42 sampling sites and 123 sediment cores collected between 2013 and 2023. The file provides sampling-site information, geographic coordinates, water depth, sampling year, sediment-core characteristics, core compaction, slicing resolution and laboratory processing methods. It also includes mean values for sedimen...