[Keyword='climate indices']
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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
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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
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Link:
GET DATA
Description: Access to blocking index data, documentation, and graphs. |
Geographic Coverage
| 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
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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
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GEOGRAPHIC REGION
> NORTHERN HEMISPHERE
GEOGRAPHIC REGION > SOUTHERN HEMISPHERE |
Data Resolution
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Temporal Resolution:
daily
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Science Keywords
| ATMOSPHERE >ALTITUDE >GEOPOTENTIAL HEIGHT [Definition] |
| ATMOSPHERE >ATMOSPHERIC PRESSURE >OSCILLATIONS >BLOCKING INDEX [Definition] |
| ATMOSPHERE >ATMOSPHERIC PRESSURE >PRESSURE ANOMALIES [Definition] |
| CLIMATE INDICATORS >ATMOSPHERIC/OCEAN INDICATORS >TELECONNECTIONS >BLOCKING INDEX [Definition] |
ISO Topic Category
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CLIMATOLOGY/METEOROLOGY/ATMOSPHERE
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Keywords
| Blocking Index |
| climate index |
| climate indices |
| forecast indices |
| atmospheric circulation |
| atmospheric blocking |
| climate change |
| geopotential gradient height |
| GHGS |
| blocking strength |
Data Set Progress
| IN WORK |
Originating Center
| NOAA/NWS/CPC |
Data Center
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Climate Prediction Center, National Centers for Environmental Prediction, National Weather Service, NOAA, U.S. Department of Commerce
[Information]
Data Center URL: http://www.cpc.ncep.noaa.gov/ Dataset ID: Blocking Index
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Distribution
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Distribution_Media:
online www
Distribution_Format: ascii Fees: none |
Personnel
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ED
O'LENIC Role: TECHNICAL CONTACT Email: Ed.Olenic at noaa.gov |
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SCOTT
A.
RITZ Role: DIF AUTHOR Phone: 301-614-5126 Fax: 301-614-5268 Email: Scott.A.Ritz at nasa.gov Contact Address: NASA Goddard Space Flight Center Global Change Master Directory City: Greenbelt Province or State: Maryland Postal Code: 20771 Country: USA |
Publications/References
Lejenas, H., and H. Okland (1983), Characteristics of Northern Hemisphere blocking as determined from a long time series of observational data, Tellus, 35A, 350-362
Tibaldi, S., and F. Molten (1990), On the operational predictability of blocking, Tellus, 42A, 343-365
Tibaldi, S., E. Tosi, A. Navarra, and L. Pedulli (1994), Northern and Southern Hemisphere seasonal variability of blocking frequency and predictability, Monthly Weather Review, 122, 1971-2003
Tibaldi, S., and F. Molten (1990), On the operational predictability of blocking, Tellus, 42A, 343-365
Tibaldi, S., E. Tosi, A. Navarra, and L. Pedulli (1994), Northern and Southern Hemisphere seasonal variability of blocking frequency and predictability, Monthly Weather Review, 122, 1971-2003
Creation and Review Dates
DIF Creation Date:
2003-02-11
Last DIF Revision Date:
2011-04-06
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