Science Keywords>ATMOSPHERE>ATMOSPHERIC PRESSURE>GRAVITY WAVE
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.
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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
(Click for Interactive Map)
Spatial coordinates   
  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
Data Resolution
Temporal Resolution: monthly
Temporal Resolution Range: Monthly - < Annual
Science Keywords
ISO Topic Category
Ancillary Keywords
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 Supplemental Info
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
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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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