Monthly Climate Timeseries:
- Description:
- This mode describes low frequency variability of the Northern Hemisphere extratropics. A positive PNA is associated with in ceased heights over the inter-mountain region of the US and low heights in the SE and off the Aleutian islands. A positive PNA is often associated with an El Ni˜o and a negative one with a La Ni˜a.
- Image:
- Time-series Plot:
- Select this link to get a plot. Plot is taken from the Times-series Plotting and Analysis web-page.
- Calculation Method:
- CPC uses rotated principal components.
- Time Interval: Monthly
- Time Coverage: 1950 to present
- Update Status: monthly
- Get Data:
- Update Status: monthly
-
PNA index: Standard PSL Format (What is standard format?)
- Source:
- Data is from the NOAA CPC
- References:
-
- Please cite CPC
Correlation of JFM 500mb height with the PNA index. Sign is such that a positive PNA is associated with |