Importante studio dell'Universita' di Rochester:

Changes in Net Flow of Ocean Heat Correlate with Past Climate Anomalies : University of Rochester News

Watts riporta: Study: Ocean net heat flow is connected with climate shifts – CO2 not correlated – no “warming in the pipeline” Watts Up With That?

Citazione:
Physicists at the University of Rochester have combed through data from satellites and ocean buoys and found evidence that in the last 50 years, the net flow of heat into and out of the oceans has changed direction three times.
These shifts in the balance of heat absorbed from the sun and radiated from the oceans correlate well with past anomalies that have been associated with abrupt shifts in the earth’s climate, say the researchers. These anomalies include changes in normal storm intensities, unusual land temperatures, and a large drop in salmon populations along the western United States.
Citazione:
The physicists also say these changes in ocean heat-flow direction should be taken into account when predicting global climate because the oceans represent 90 percent of the total heat in the earth’s climate system.
Cose di cui parlo sempre ma fa piacere leggerle in studi scientifici riconosciuti.

Sugli shift del 76 e del 98:
Citazione:
“These shifts happened relatively abruptly,” says David Douglass, professor of physics at the University of Rochester, and co-author of the paper. “One, for example, happened between 1976 and 1977, right when a number of other climate-related phenomenona were happening, such as significant changes in U. S. precipitation.”
Douglass says the last oceanic shift occurred about 10 years ago, and that the oceans are currently emitting slightly more radiation than they are receiving.
Le conclusioni sono molto importanti:
Citazione:
The team believes that the oceans may change how much they absorb and radiate depending on factors such as shifts in ocean currents that might change how the deep water and surface waters exchange heat. In addition to the correlation with strange global effects that some scientists suspect were caused by climate shifts, the team says their data shows the oceans are not continuously warming—a conclusion not consistent with the idea that the oceans may be harboring “warming in the pipeline.” Douglass further notes that the team found no correlation between the shifts and atmospheric carbon dioxide concentration.
In pratica a loro risulta che non puo' considerarsi che in Oceano ci sia "calore nascosto da elargire nel futuro" ma che ciclicamente assorba o emetta calore cambiando direzione in modo brusco.

Inoltre non gli risulta alcuna correlazione con la concentrazione di CO2 in atmosfera.

Se questi "shift" oceanici dipendano da questioni astronomiche (lo spostamento dei pianeti sposta il centro di massa del sistema solare aumentando o diminuendo il momento angolare solare ) e' sotto discussione nel TD aperto da Claudio sul lavoro di Scafetta e altri: Il Sole influenza il clima anche su base meno che decadale

Vedi anche l'articolo di Claudio su ClimateMonitor: Il Sole e le variazioni decadali nelle temperature terrestri | Climate Monitor