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Northern and Southern Hemisphere Blocking Index from NOAA/Climate Prediction Center

Entry ID: NOAA_NWS_CPC_BLOCKING

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Summary

Abstract: [Source: NOAA Climate Prediction Center, http://www.cpc.ncep.noaa.gov/ ]

The blocking index of Tibaldi and Molteni (1990) was modified from that of Lejenas and Okland (1983). The index is local and instantaneous, ideally suited for real-time atmospheric monitoring, isolating regions of easterly flow at 500 hPa associated with high-latitude blocks.

This dataset uses the blocking index calculation for the northern hemisphere, however the index can be easily modified to examine blocking in the southern hemisphere. Blocking in the southern hemisphere typically occurs at lower latitudes when compared with the northern hemisphere. The index follows Tibaldi et al. (1994).

Related URL

Link: GET DATA

Description: Access to blocking index data, documentation, and graphs.

Geographic Coverage

(Click for Interactive Map)

Spatial coordinates

	N: 90.0	S: 0.0	E: 180.0	W: -180.0
Min Altitude: 0 HPA Max Altitude: 500 HPA

	N: -0.0	S: -90.0	E: 180.0	W: -180.0
Min Altitude: 0 HPA Max Altitude: 500 HPA

Data Set Citation

Dataset Originator/Creator: Tibaldi, S., and F. Molteni

Dataset Title: Blocking Index

Dataset Series Name: NOAA/NWS/CPC Indices and Forecasts

Dataset Release Date: ongoing

Dataset Release Place: Camp Springs, MD

Dataset Publisher: NOAA National Weather Service, Center for Climate Prediction

Online Resource: http://www.cpc.ncep.noaa.gov/products/precip/CWlink/MJO/block.shtml

Temporal Coverage

Start Date: 2002-01-01

Location Keywords

GEOGRAPHIC REGION > NORTHERN HEMISPHERE

GEOGRAPHIC REGION > SOUTHERN HEMISPHERE

Data Resolution

Temporal Resolution: daily

Science Keywords

ATMOSPHERE > ALTITUDE > GEOPOTENTIAL HEIGHT

ATMOSPHERE > ATMOSPHERIC PRESSURE > OSCILLATIONS > BLOCKING INDEX

ATMOSPHERE > ATMOSPHERIC PRESSURE > PRESSURE ANOMALIES

CLIMATE INDICATORS > ATMOSPHERIC/OCEAN INDICATORS > TELECONNECTIONS > BLOCKING INDEX

ISO Topic Category

CLIMATOLOGY/METEOROLOGY/ATMOSPHERE

Instrument

BOTTOM TRAWL
DEMERSAL TRAWL

Access Constraints These data are not publicly available.

Use Constraints This data set conforms to the PICCCBY Attribution License
(http://creativecommons.org/licenses/by/3.0/).

Please follow instructions listed in the citation reference provided at http://data.aad.gov.au/aadc/metadata/citation.cfm?entry_id=ASAC_118... when using these data.

Ancillary Keywords

Invertebrates

Fishing

Trawl

Cameras

Data Set Progress

COMPLETE

Data Center

Australian Antarctic Data Centre, Australia

Data Center URL: http://data.aad.gov.au

Data Center Personnel
Name: DATA OFFICER AADC Phone: +61 3 6232 3244 Fax: +61 3 6232 3351 Email: metadata at aad.gov.au Contact Address: Australian Antarctic Division 203 Channel Highway City: Kingston Province or State: Tasmania Postal Code: 7050 Country: Australia