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Monthly HC300-based PDO

Definition of HC300-based PDO

H300 based PDO index (HPDO) is defined as the projections of monthly mean H300 anomalies from NCEP GODAS onto their first EOF vector in the North Pacific (20ºN-60ºN). The 30-yr period from 1981-2010 is used to derived the climatology and the EOF analysis.

Compared to the conventional SST-based PDO (SPDO), HPDO provides a natural way to highlight the slower frequency variability in the SPDO and encapsulates an integrated view of temperature variability associated with the PDO in the upper ocean.

Download monthly H300 based PDO index


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