f7959b23-bf6e-4b56-b087-551684e2ad96 Copernicus Marine Service product specification CMEMS servicedesk.cmems@mercator-ocean.eu http://marine.copernicus.eu/ 2021-07-19T09:53:22 ISO 19139, MyOcean profile 0.2 2 0.25 0.25 false WGS 84 (EPSG:4326) EPSG Spatial distribution of the altimeter mean sea level anomalies during the last year compared with the reference period GLOBAL_OMI_SL_anomalies 2012-08-26 3.4 2012-08-28 a0b71e7b-4a71-43a6-a5c1-8b5bb52ae7fe '''DEFINITION''' The sea level ocean monitoring indicator is derived from the DUACS delayed-time (DT-2018 version) altimeter gridded maps of sea level anomalies based on a stable number of altimeters (two) in the satellite constellation. These products are distributed by the Copernicus Climate Change Service and are also available in the CMEMS catalogue (SEALEVEL_GLO_PHY_CLIMATE_L4_REP_OBSERVATIONS_008_057). To compute the regional mean sea level during the last year, the daily sea level maps of this year are first processed to obtain anomalies referenced to the 1993-2014 period. Then, the obtained individual maps are averaged during the last year. The altimeter data have not been corrected for the effect of the Glacial Isostatic Adjustment (GIA). '''CONTEXT''' Mean sea level evolution has a direct impact on coastal areas and is a crucial index of climate change since it reflects both the amount of heat added in the ocean and the mass loss due to land ice melt (e.g. IPCC, 2013; Dieng et al., 2017). Long-term and inter-annual variations of the sea level are observed at global and regional scales. They are related to the internal variability observed at basin scale and these variations can strongly affect population living in coastal areas. '''CMEMS KEY FINDINGS''' The sea level anomaly field for 2018 compared to the 1993-2014 climatology shows a large negative anomaly in the western subtropical Pacific Ocean and a positive anomaly along the equator, likely associated with ENSO (Schiermeier 2015). Note that an opposite pattern was observed with the 2017 anomaly. In 2019, a rather negative/positive dipole is observed in the West/East subtropical Pacific (the positive equatorial anomaly observed in 2018 is no more observed westward of 160°E. While in 2016, the northward extension of the positive anomaly reached the western US coast (Legeais et al. 2018), it is reduced during 2017 and a negative anomaly is observed in this area. In 2018, this anomaly has almost disappeared and in 2019, a positive anomaly is observed along all the western coast of North and South America. The slightly negative anomaly observed north of the Gulf Stream close to Greenland in 2017 is still observed in 2018 but has a reduced signature in 2019. And the negative anomaly found in 2017 in the North Indian ocean has disappeared in 2018 and a strong East/West dipole is observed in 2019. No major evolution has been observed in the South Atlantic Ocean between 2017, 2018 and 2019. In the Mediterranean Sea, a slightly higher sea level has been observed in 2018 compared to its climatological mean over the entire basin. Such a basin-wide pattern can be related to a response to changes in mass flux through the Strait of Gibraltar forced by the wind (Fukumori et al. 2007) but also to the interannual variability observed in this region (Pinardi & Masetti 2000). Reduced anomalies are observed in 2019 in the Mediterranean Sea. In the Baltic Sea, the positive anomaly observed in 2017 has been linked to a major inflow event (Mohrholz et al. 2015) that took place in 2015-2016 and the amplitude of the Baltic sea level anomaly has strongly reduced in 2018 and 2019. E.U. Copernicus Marine Service Information Yannice Faugère SL-CLS-TOULOUSE-FR managementboard-sltac@cls.fr Françoise Mertz SL-CLS-TOULOUSE-FR servicemanager-sltac@cls.fr SL-CLS-TOULOUSE-FR SL-CLS-TOULOUSE-FR servicedesk.cmems@cls.fr Jean-François Legeais SL-CLS-TOULOUSE-FR servicemanager-sltac@cls.fr MOI-OMI-SERVICE MOI-OMI-SERVICE omi.service@mercator-ocean.fr P0M0D0H/P0M0D0H N/A https://catalogue.marine.copernicus.eu/documents/IMG/GLOBAL_OMI_SL_anomalies.png Oceanographic geographical features GEMET - INSPIRE themes, version 1.0 2009-09-22 satellite-observation Discipline 2017-04-25 geonetwork.thesaurus.local.discipline.myocean.discipline sea_surface_height_above_sea_level Climate and Forecast Standard Names 2017-04-04 geonetwork.thesaurus.external.parameter.myocean.ocean-variables invariant* Temporal scale 2009-06-12 geonetwork.thesaurus.local.temporal-scale.myocean.temporal-scale coastal-marine-environment marine-resources weather-climate-and-seasonal-forecasting marine-safety Area of benefit 2009-09-09 geonetwork.thesaurus.local.area-of-benefit.myocean.area-of-benefit global-ocean Reference Geographical Areas 2009-09-09 geonetwork.thesaurus.local.reference-geographical-area.myocean.reference-geographical-area N/A Processing level 2009-06-12 geonetwork.thesaurus.local.processing-level.myocean.processing-level Not Applicable Model assimilation 2016-02-03 geonetwork.thesaurus.external.theme.myocean.model-assimilation See Copernicus Marine Environment Monitoring Service Data commitments and licence at: http://marine.copernicus.eu/web/27-service-commitments-and-licence.php No limitations on public access 85ed55be-f6a0-48cc-b5dc-709c2c2a1d46 Dieng, H. B., A. Cazenave, B. Meyssignac, and M. Ablain: New estimate of the current rate of sea level rise from a sea level budget approach, Geophys. Res. Lett., 44, https://doi.org/10.1002/2017GL073308, 2017. 2019-05-08 Fukumori I, Menemenlis D, Lee T. 2007. A near-uniform basin-wide sea level fluctuation of the Mediterranean Sea. J Phys Ocean. 37:338-358. 2019-05-08 IPCC 5th Assessment Report. 2013. The physical Science Basis. Contribution of Working Group I to the Fifth Assessment Report of the Intergouvernmental Panel on Climate Change. 2019-05-08 Legeais J-F, K. von Schuckmann, A. Melet, A. Storto and B. Meyssignac: Sea Level, in Copernicus Marine Service Ocean State Report, Issue 2, J Oper Oceanogr, 11, S1, s13-s16, DOI: 10.1080/1755876X.2018.1489208. 2019-05-08 Mohrholz V, Naumann MM, Nausch G, Krüger S, Gräwe U. 2015. Fresh oxygen for the Baltic Sea – an exceptional saline inflow after a decade of stagnation. J Mar Sys. 148:152-166. 2019-05-08 Pinardi N, Masetti E. 2000. Variability of the large scale general circulation of the Mediterranean Sea from observations and modelling: a review. Palaeogeogr Palaeocl. 158:153-173. doi:10.1016/S0031-0182(00)00048-1. 2019-05-08 Schiermeier Q. 2015. Hunting the Gozilla El Nino. Nature. 526:490–491. doi:10.1038/526490a. 2019-05-08 eng oceans bounding box -180.00 180.00 -89.00 89.00 yearly-mean 1901-01-01 1901-01-01 0 0.0 display priority: 99999 observation temporal resolution: annual mean vertical level number: 1 false undefined WWW:FTP global_omi_sl_anomalies 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 The myOcean products depends on other products for production or validation. The detailed list of dependencies is given in ISO19115's aggregationInfo (ISO19139 Xpath = "gmd:MD_Metadata/gmd:identificationInfo/gmd:aggregationInfo[./gmd:MD_AggregateInformation/gmd:initiativeType/gmd:DS_InitiativeTypeCode/@codeListValue='upstream-validation' or 'upstream-production']")