- Thumbnail
- Resource ID
- 63122e60-9e5a-11ed-8a01-0242ac140007
- Title
- POSEIDON System
- Date
- Jan. 27, 2023, 3:50 p.m., Publication
- Abstract
- Hellenic Centre for Marine Research (HCMR). The POSEIDON general aims are: (a) to establish a sustainable marine observing network in the Eastern Mediterranean, (b) to provide quality and validated forecasts of the marine environment, (c) to provide scientific knowledge and support on the study of the ocean mechanisms and their variability, as well as to address the sensitivity of marine ecosystem and biodiversity to combined natural forcing factors and anthropogenic pressures, and (d) to provide a technology test bed and services to marine policy-makers and the society. The system is being developed in accordance to the policy frameworks suggested by IOC/GOOS, EuroGOOS, MonGOOS and GEO while it maintains a balance between the operational and research character of the infrastructure through the integration of methodologies and tools developed in relevant EU initiatives and projects. The POSEIDON ecosystem simulation tool comprises two on-line coupled models: A hydrodynamic, based on the Princeton Ocean Model (POM) (Blumberg and Mellor, 1978) with a 1/10° resolution and 24 sigma layers, and a low-trophic biogeochemical model based on the European Regional Seas Ecosystem Model (ERSEM, Baretta et al., 1995; Blackford et al., 2004; Petihakis et al. 2002). A weekly data assimilation scheme is employed on physical parameters (Korres et al., 2008) while a second order conservative upstream advection scheme (Lin et al., 1994) is used for the biological tracers. Following the prominent characteristics of the Mediterranean Sea ecosystem, three major functional groups are included (primary producers, heterotrophs and decomposers), providing all the necessary information for the description and analysis of carbon cycling processes, with each group further subdivided into a number of subgroups following size and/or feeding method differentiations creating a web of ten state variables. Four of those belong to phytoplankton (diatoms, nanoplankton, picoplankton, dinoflagellates), three to heterotrophs (heterotrophic flagellates, microzooplankton, mesozooplankton), one to decomposers (bacteria) and two represent non-living organic matter (particulate and dissolved). Carbon flow in the web is governed by processes operating both at physiological and community level such as growth, respiration, lysis, excretion, mortality and grazing, while nutrients are loosely coupled to carbon through a variable C:N:P:Si ratio scheme.
- Edition
- --
- Responsible
- cfrangoulis@hcmr.gr
- Point of Contact
- Frangoulis
- cfrangoulis@hcmr.gr
- Purpose
- --
- Maintenance Frequency
- opportunistically
- Type
- not filled
- Restrictions
- None
- None
- License
- Not Specified
- Language
- eng
- Temporal Extent
- Start
- Jan. 1, 2010, midnight
- End
- --
- Supplemental Information
- No information provided
- Data Quality
- --
- Extent
-
- x0: 21.2902
- x1: 25.683
- y0: 35.4342
- y1: 39.975
- Spatial Reference System Identifier
- EPSG:4326
- Keywords
- no keywords
- Category
- None
- Regions
-
Mediterranean Sea
,
Greece