Global anomaly map of ocean heat content
'''DEFINITION'''
Estimates of Ocean Heat Content (OHC) are obtained from integrated differences of the measured temperature and a climatology along a vertical profile (here 0-700m) in the ocean. The annual mean ocean heat content of the year 2019 is substracted from a reference climatology (1993-2014) at each grid point is then evaluated to obtain a global map of ocean heat content anomalies in the year 2018, expressed in Joules per square meter (J/m2).
'''CONTEXT'''
Knowing how much and where heat energy is stored and released in the ocean is essential for understanding the contemporary Earth system state, variability and change, as the oceans shape our perspectives for the future (von Schuckmann et al., 2020). Variations in OHC can induce changes in ocean stratification, currents, sea ice and ice shelfs (IPCC, 2019); they set time scales and dominate Earth system adjustments to climate variability and change (Hansen et al., 2011); they are a key player in ocean-atmosphere interactions and sea level change (WCRP, 2018) and they can impact marine ecosystems and human livelihoods (IPCC, 2019).
'''CMEMS KEY FINDINGS'''
The year 2018 has shown the highest ocean heat content on record (WMO, 2019), and higher-than-average ocean heat content is reported over most areas of the global ocean and the European regional seas. In some areas – e.g. the western boundary current regions of the Pacific and Atlantic Ocean in both hemispheres reach values of more than 3 J/m2. There are two areas of lower-than-average upper ocean heat content, which stand out from the generally warm conditions: the western tropical Pacific, and the subpolar North Atlantic. The latter is linked to the so called “North Atlantic cold event” which persists since a couple of years (Dubois et al., 2018). However, its signature has significantly reduced compared to preceding years.
Date(s) Date(s) |
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Contact(s) Contact(s) |
Yann Drillet
(
GLO-MERCATOR-TOULOUSE-FR
)
Karina Von Schuckmann ( GLO-MERCATOR-TOULOUSE-FR ) GLO Service Desk ( GLO-MERCATOR-TOULOUSE-FR ) Renaud Dussurget ( GLO-MERCATOR-TOULOUSE-FR ) MOI-OMI-SERVICE ( MOI-OMI-SERVICE ) |
Source Source |
E.U. Copernicus Marine Service Information |
Lineage Généalogie |
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']") |
Constraints Contraintes |
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Spatial informations Informations géographiques |
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