Monthly Globally Integrated Angular Momentum Index
Entry ID: NOAA_NWS_CPC_GIAM

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Summary
Abstract: [Source: NOAA Earth System Research Laboratory, Physical Sciences Division, http://www.esrl.noaa.gov/psd/ ]

The atmospheric angular momentum is the product of mass times the rotational velocity times the perpendicular distance from the axis of rotation. A rotating object will conserve its angular momentum unless a torque acts to change its rotation. The axial component is of interest in climate and is determined by the distribution of atmospheric mass and zonal wind relative to the earth's rotation axis. Higher than normal surface pressure in the tropics or strong westerly flow there contributes to greater AAM.

Related URL
Link: GET DATA
Description: Access to monthly globally integrated angular momentum index data
since 1958 scaled by 1e25.


Link: GET DATA
Description: Access to experimental forecast daily and monthly global atmospheric
angular momentum


Geographic Coverage
 N: 90.0 S: -90.0  E: 180.0  W: -180.0

Data Set Citation
Dataset Originator/Creator: NOAA/OAR/ESRL/PSD
Dataset Title: Globally Integrated Angular Momentum Index
Dataset Series Name: NOAA Indices and Forecasts
Dataset Release Date: ongoing
Dataset Release Place: Boulder, CO, USA
Dataset Publisher: NOAA/OAR/ESRL/PSD
Online Resource: http://www.esrl.noaa.gov/psd/data/climateindices/List/


Temporal Coverage
Start Date: 1958-01-01


Location Keywords
GEOGRAPHIC REGION > GLOBAL


Data Resolution
Temporal Resolution: monthly


Science Keywords
ATMOSPHERE >ATMOSPHERIC PRESSURE >GRAVITY WAVE    [Definition]
ATMOSPHERE >ATMOSPHERIC WINDS >UPPER LEVEL WINDS    [Definition]
ATMOSPHERE >ATMOSPHERIC WINDS >VERTICAL WIND MOTION    [Definition]
ATMOSPHERE >ATMOSPHERIC WINDS >VORTICITY    [Definition]
ATMOSPHERE >ATMOSPHERIC WINDS >WIND STRESS    [Definition]
ATMOSPHERE >ATMOSPHERIC WINDS >WIND PROFILES    [Definition]
CLIMATE INDICATORS >ATMOSPHERIC/OCEAN INDICATORS >TELECONNECTIONS >GLOBALLY INTEGRATED ANGULAR MOMENTUM >GIAM    [Definition]


ISO Topic Category
CLIMATOLOGY/METEOROLOGY/ATMOSPHERE


Keywords
Globally Integrated Angular Momentum
climate index
climate indices
climate change


Data Set Progress
IN WORK


Originating Center
NOAA/NWS/CPC


Data Center
Physical Sciences Division, Earth System Research Laboratory, OAR, NOAA, U.S. Department of Commerce    [Information]
Data Center URL: http://www.esrl.noaa.gov/psd/
Dataset ID: GIAM Index

Data Center Personnel
Name: ESRL/PSD DATA INQUIRIES
Email: esrl.psd.data at noaa.gov



Distribution
Distribution_Media: online www
Distribution_Format: ascii
Fees: none


Personnel
ESRL/PSD DATA INQUIRIES
Role: TECHNICAL CONTACT
Email: esrl.psd.data at noaa.gov


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
Weickmann, K.M., W.A. Robinson and M.C. Penland, 2000: Stochastic and
oscillatory forcing of global atmospheric angular
momentum. J. Geophys. Res., 105, D12, 15543-15557.

Creation and Review Dates
DIF Creation Date: 2005-12-15
Last DIF Revision Date: 2009-11-05

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