Pacific-North America (PNA) Pattern

Federal Geographic Data Committee (FGDC) Metadata:

• Identification_Information
• Data_Quality_Information
• Spatial_Reference_Information
• Distribution_Information
• Metadata_Reference_Information

Identification_Information:

Citation:

Citation_Information:

Originator: NOAA/NWS/CPC

Publication_Date: ongoing

Title: Pacific-North America (PNA) Pattern

Edition:

Geospatial_Data_Presentation_Form:

Series_Information:

Series_Name: NOAA/NWS/CPC Indices and Forecasts

Issue_Identification:

Publication_Information:

Publication_Place: Camp Springs, MD

Publisher: NOAA National Weather Service, Center for Climate Prediction

Other_Citation_Details:

Online_Linkage: http://www.cpc.ncep.noaa.gov/products/precip/CWlink/pna/pna_index.html

Description:

Abstract:

[Source: NOAA Climate Prediction Center, http://www.cpc.ncep.noaa.gov/ ] The daily Pacific-North America Patter (PNA) index is constructed by properly projecting the daily (00Z) 500mb height anomalies over the Northern Hemsiphere onto the loading pattern of the PNA. The daily PNA index and its forecasts using MRF and Ensemble mean forecast data are available for the previous 120 days and they are normalized by standard deviation of the monthly PNA index from 1950 to 2000. A 3-day running mean is applied for the forecast indices. Monthly and seasonal mean (JFM) PNA Index data are also available. See: http://www.cpc.ncep.noaa.gov/products/precip/CWlink/pna/pna_index.html The PNA pattern is one of the most prominent modes of low-frequency variability in the Northern Hemisphere extratropics, appearing in all months except June and July. The PNA pattern reflects a quadripole pattern of height anomalies, with anomalies of similar sign located south of the Aleutian Islands and over the southeastern United States. Anomalies with sign opposite to the Aleutian center are located in the vicinity of Hawaii, and over the intermountain region of North America (central Canada) during the Winter and Fall (Spring). The spatial scale of the PNA pattern is most expansive in Winter. During this period, the Aleutian center spans most of the northern latitudes of the North Pacific. In Spring, the Aleutian center contracts and becomes confined primarily to the Gulf of Alaska. However, the subtropical center near Hawaii reaches maximum amplitude during the spring. The PNA pattern then disappears during June and July, but reappears in the late summer and fall. During this period, the midlatitude centers become dominant and appear as a wave pattern emanating from the eastern North Pacific. The subtropical center near Hawaii is weakest during this period. The time series of the PNA pattern also indicates substantial interseasonal, interannual and interdecadal variability. For example, a negative phase of the pattern dominated the period from 1964-1967, while a positive phase of the pattern tended to dominate from 1976-1988. A negative phase of the PNA then dominated during the 1989-1990 period, followed by a prolonged positive phase from fall 1991- early spring 1993. For additional information on the PNA, see: http://www.cpc.ncep.noaa.gov/data/teledoc/pna.shtml

Purpose:

Not Available

Supplemental_Information:

Not Available

Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 19500101

Ending_Date: Unknown

Currentness_Reference:Unknown

Status:

Progress: In Work

Maintenance_and_Update_Frequency: As needed

Spatial_Domain:

Description_of_Geographic_Extent:

Bounding_Coordinates:

West_Bounding_Coordinate: -180.0

East_Bounding_Coordinate: 180.0

North_Bounding_Coordinate: 90.0

South_Bounding_Coordinate: 10.0

Keywords:

Theme:

Theme_Keyword_Thesaurus: GCMD SCIENCE PARAMETERS

Theme_Keyword_Thesaurus: ANCILLARY KEYWORDS

Theme_Keyword_Thesaurus: ISO TOPIC CATEGORY

Theme_Keyword_Thesaurus: DATA SET LANGUAGE

Theme_Keyword: EARTH SCIENCE > ATMOSPHERE > ALTITUDE > GEOPOTENTIAL HEIGHT

Theme_Keyword: EARTH SCIENCE > CLIMATE INDICATORS > ATMOSPHERIC/OCEAN INDICATORS > TELECONNECTIONS > PACIFIC/NORTH AMERICAN (PNA) PATTERN > PNA

Theme_Keyword: Pna

Theme_Keyword: Pacific-north America Index

Theme_Keyword: Climate Index

Theme_Keyword: Climate Indices

Theme_Keyword: Forecast Indices

Theme_Keyword: Atmospheric Circulation

Theme_Keyword: Climate Change

Theme_Keyword: CLIMATOLOGY/METEOROLOGY/ATMOSPHERE

Theme_Keyword: ENGLISH

Place:

Place_Keyword_Thesaurus: GCMD

Place_Keyword: OCEAN > PACIFIC OCEAN > NORTH PACIFIC OCEAN

Place_Keyword: OCEAN > PACIFIC OCEAN

Place_Keyword: CONTINENT > NORTH AMERICA

Place_Keyword: GEOGRAPHIC REGION > NORTHERN HEMISPHERE

Temporal:

Temporal_Keyword_Thesaurus: GCMD

Temporal_Keyword: Daily, Monthly, Seasonal

Access_Constraints: Not Available

Use_Constraints:

Not Available

Data_Quality_Information:

Attribute_Accuracy:

Attribute_Accuracy_Report:

Not Available

Logical_Consistency_Report:

Not Available

Completeness_Report:

Not Available

Lineage:

Process_Step:

Process_Description:

Not Available

Process_Date: Unknown

Spatial_Reference_Information:

Distribution_Information:

Distributor:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: DOC/NOAA/NWS/NCEP/CPC > Climate Prediction Center, National Centers for Environmental Prediction, National Weather Service, NOAA, U.S. Department of Commerce

Contact_Person: ED O'LENIC

Contact_Position: DATA CENTER CONTACT

Contact_Address:

Address_Type: Mailing and Physical Address

Contact_Electronic_Mail_Address: Ed.Olenic@noaa.gov

Resource_Description: PNA

Distribution_Liability:

Not Available

Standard_Order_Process:

Digital_Form:

Digital_Transfer_Information:

Format_Name: ascii

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name:

http://www.cpc.ncep.noaa.gov/

Access_Instructions:

DATA CENTER URL

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name:

http://www.cpc.ncep.noaa.gov/products/precip/CWlin...

Access_Instructions:

Access to PNA documentation, graphics, and data

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name:

http://www.cpc.ncep.noaa.gov/products/precip/CWlin...

Access_Instructions:

Access to PNA monthly mean data since 1950.

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name:

http://www.cpc.ncep.noaa.gov/data/teledoc/pna.shtm...

Access_Instructions:

Access to PNA documentation, graphs and data

Fees: None

Metadata_Reference_Information:

Metadata_Date: 20030211

Metadata_Review_Date: 20091104

Metadata_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: GCMD User Support Office

Contact_Organization: NASA Global Change Master Directory

Contact_Address:

Address_Type: Mailing and Physical Address

Address: Not Available

City: Lanham

State_or_Province: MD

Postal_Code: 20706

Country: USA

Contact_Voice_Telephone: Not Available

Contact_Electronic_Mail_Address: gcmduso@gcmd.gsfc.nasa.gov

Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata

Metadata_Standard_Version: FGDC-STD-001-1998

Metadata_Time_Convention: local time