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Hi All, I'm struggling a bit getting my head around the AM side of things, before I move on to the GWO orbits etc .. to be honest I have for a long time!, so I'm hoping I can tap in to the hive mind and get a better understanding .. My understanding is: 1)Angular momentum is a property of the mass in motion about the earths axis (Understood!) 2)That 'momentum' is from a combination of: The rotation speed, the mass, the length of the radius arm. In a closed system (i.e. the whole earth) AM is conserved. (Understood!) 3)(Like a skater) - if the length of the radius arm is decreased, the rotation speed increases as the mass stays the same .. I get that bit (unless I have that incorrect of course - Understood!) 4)I have read: Eastward winds circulate around the equator, in the same direction as the earths rotation. This means that parcels of air rotate more rapidly than the earth does (Understood!) 5)I have also read: The frictional drag (surface friction I presume) that is acting to slow these winds down, transfers angular momentum from the earth to the atmosphere.... (Erm ...) This is the point I start dribbling.. to me if the easterly winds are travelling faster than the earths rotation, then any friction with the surface will slow these winds and transfer that energy to speeding up the earths rotation! (I have read that the Length of day DOES change, much to my surprise!) - but if so then that's not in my book 'transfer of angular momentum from the earth to the atmosphere' - its the opposite. I also read, and didn't quite understand, that the direction of the air packet itself adds/subtracts to the overall mass from the centre, to the end of the radius arm in a rotating system - but this didn't clear anything up, unless that detracts from rotation in itself.. In short, I'm a deeply confused man .. can you help! Springboarding off into GWO orbits and mountain torques won't help me - I need to get the absolute fundamentals here! Many thanks, Samos
Here are the current Papers & Articles under the research topic Atmospheric Angular Momentum (AAM). Click on the title of a paper you are interested in to go straight to the full paper. Angular momentum in the global atmospheric circulation A Synoptic–Dynamic Model of Subseasonal Atmospheric Variability Atmospheric torques and Earth’s rotation: what drove the millisecond-level length-of-day response to the 2015–2016 El Niño? Axial Angular Momentum: Vertical Fluxes and Response to Torques Centennial Trend and Decadal-to-Interdecadal Variability of Atmospheric Angular Momentum in CMIP3 and CMIP5 Simulations Isentropic Pressure and Mountain Torques Latitude–Height Structure of the Atmospheric Angular Momentum Cycle Associated with the Madden–Julian Oscillation Mountains, the Global Frictional Torque, and the Circulation over the Pacific–North American Region Regional Sources of Mountain Torque Variability and High-Frequency Fluctuations in Atmospheric Angular Momentum Relationship between Tropical Pacific SST and global atmospheric angular momentum in coupled models Stochastic and oscillatory forcing of global atmospheric angular momentum Studies of atmospheric angular momentum The atmospheric angular momentum cycle during the tropical Madden-Julian Oscillation The Dynamics of Intraseasonal Atmospheric Angular Momentum Oscillations The intraseasonal atmospheric angular momentum associated with MJO convective initiations Torques and the Related Meridional and Vertical Fluxes of Axial Angular Momentum Unusual Behavior in Atmospheric Angular Momentum during the 1965 and 1972 El Niños
Hi All, I'm struggling a bit getting my head around the AM side of things, before I move on to the GWO orbits etc .. to be honest I have for a long time!, so I'm hoping I can tap in to the hive mind and get a better understanding .. My understanding is: