Jim Hurrell, Senior Scientist
North Pacific (NP) Index
Reference Information
| Index | Description | Updated Thru | Next Update | Format |
| NP Index (NDJFM,Monthly) |
The NP Index is the area-weighted sea level pressure over the region 30N-65N, 160E-140W, available since
1899. Timeseries Plots |
July 2009 | April 2010 or as requested | HTML Table (Monthly) / HTML Table (NDJFM) / HTML Table (NDJFM Anomalies) |
Reference Information
Correct reference for the NP timeseries taken directly from this webpage:
NP Index Data provided by the Climate Analysis Section, NCAR, Boulder, USA, Trenberth and Hurrell (1994).