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4 results for “atmospheric angular momentum”
Atmospheric angular momentum predictions
<p>Monthly mean predictions of atmospheric angular momentum for each year from 1960.</p> <p>All predictions start on 1 November.</p> <p>There is one value per month per latitude per year.</p> <p>Summing the values for each latitude gives the global mean.</p>
Observational atmospheric angular momentum.
<p>Reanalyses of Earth's angular momentum from ERA data. Data are divided by 1.0e+24.<br>Each row consists of 12 monthly means.<br>Data are given for each of 324 latitudes, starting near the S pole.<br>Data are given for each year from 1960, starting from November 1960 to match model predictions.</p>
Atmospheric angular momentum estimates from MERRA-2, 1994 - 2022
<p>Data supplement for manuscript "Revisiting the excitation of free core nutation" by Mostafa Kiani Shahvandi, Michael Schindelegger, Lara Börger, Siddhartha Mishra and Benedikt Soja, submitted to <em>JGR: Solid Earth.</em></p> <p> </p> <ul> <li>Data source: Modern-Era Retrospective analysis for Research and Applications version 2 (MERRA-2)</li> <li>Temporal resolution: 3 hourly</li> <li>Units for mass and motion terms: kg*m^2*s^(-1)</li> <li>Processing: Stationary signals due to atmospheric tides have been removed</li> <li>Other processing steps: Mass term are corrected for the oceans's IB (inverted barometer) response</li> </ul> <p> </p> <p>For further information see <em>ReadMe.txt</em>.</p> <p> </p> <p>Contact: L. Börger (lboerger@igg.uni-bonn.de)</p>
Consistent set of atmospheric and oceanic angular momentum, 1994 - 2022
<p>Data supplement for manuscript Kiani Shahvandi, M., Schindelegger, M., Börger, L., Mishra, S., & Soja, B. (2024). Revisiting the excitation of free core nutation. <em>Journal of Geophysical Research: Solid Earth</em>, 129, e2024JB029583. <a href="https://doi.org/10.1029/2024JB029583">https://doi.org/10.1029/2024JB029583</a></p> <p> </p> <p>Specifications for AAM:</p> <ul> <li>Data source: Modern-Era Retrospective analysis for Research and Applications version 2 (MERRA-2)</li> <li>Temporal resolution & coverage: 3 hourly, 1994--2022</li> <li>Units for mass and motion terms: kg*m^2*s^(-1)</li> <li>Processing: Stationary signals due to atmospheric tides have been removed</li> <li>Other processing steps: Mass terms include angular momentum changes associated with the ocean's inverted barometer (IB) response</li> </ul> <p> </p> <p>Specifications for OAM:</p> <ul> <li>Derived from a barotropic ocean model simulation (the DEBOT model w/o data assimilation) using MERRA-2 atmospheric forcing</li> <li>Temporal resolution & coverage: 3 hourly, 1994--2022</li> <li>Units for mass and motion terms: kg*m^2*s^(-1)</li> <li>Processing: Stationary signals due to atmospheric tides have been removed</li> <li>Other processing steps: Angular momentum changes associated with the ocean's IB response are not part of OAM, but AAM (see above)</li> </ul> <p> </p> <p>For further information see <em>ReadMe.txt</em>.</p> <p> </p> <p>Terms of usage:</p> <p>If you use the AAM time series, please cite: </p> <p>Kiani Shahvandi, M., Schindelegger, M., Börger, L., Mishra, S., & Soja, B. (2024). Revisiting the excitation of free core nutation. <em>Journal of Geophysical Research: Solid Earth</em>, 129, e2024JB029583. <a href="https://doi.org/10.1029/2024JB029583">https://doi.org/10.1029/2024JB029583</a></p> <p> </p> <p>If you use the OAM time series, please cite: </p> <p>Harker, A.A., Schindelegger, M., Ponte, R.M., Salstein, D.A., 2021. Modeling ocean-induced rapid Earth rotation variations: an update. <em>J Geod</em> <strong>95</strong>, 110. https://doi.org/10.1007/s00190-021-01555-z</p> <p> </p> <p>Please cite both papers if you use the AAM and OAM time series.</p> <p> </p> <p>Contact: L. Börger (lboerger@igg.uni-bonn.de)</p>
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