Possible mechanism for generating changes in wave number 1 and wave number 4 in vertical ExB drift (compare w. and w/o ECMWF simulations) Status: 11 January 2013 Based on the timegcm run with daily ECMWF and GSWM02 tides Consequence: Possible replacement of figure 7 and 9 of the draft paper
Possible mechanism for generating changes in wave number 1 and wave number 4 in vertical ExB drift (compare w. and w/o ECMWF simulations)
Status: 11 January 2013
Based on the timegcm run with daily ECMWF and GSWM02 tides
Consequence: Possible replacement of figure 7 and 9 of the draft paper
Figure 7: focus on PW1 at high latitude
Figure 9: might need two panels one for 70-80 km DE3+PW1-> DE2
110 km DE3+DE2->PW1
First examine what mechanism is taking place?
Wavenumber and wave number 4 in vertical 4 in vertical ExB drift
DE3 is decreased in E-region in the simulation with PW1 at the LB.
Examine mechanism PW1+DE3->DE2 + DE4
Why is DE3 weak at 110 km?
Maybe around 80 km DE3 interacts with PW1 and generate a DE2, and in E-region DE2 and DE3 generate a PW1?
New plot with TW3 interaction between SW1 and SW2
TW3 in the case w/o ECMWF has larger amplitude in E-region than w. ECWMF. TW3 is generated by nonlinear interaction, especially between DW1 and SW2 since TW3 is not specified at the lower boundary of the model. In the case w.ECMWF SW2 at 110 km and 50 deg lat. Is slightly larger than SW2 w/o ECMWF. However looking at the lat-DOY plot of SW2 with and without ECMWF it can be seen that SW2 w/ECMWF is smaller than w/oECMWF (lat. Structure of SW2 is slightly different). DW1 in the case w. ECMWF shows more temporal variation and the magnitude is smaller than w/oECMWF. TW3 in the case of w.ECMWF shows the temporal signature of SW2, indicating that SW2 and DW1 are generating TW3.
TW3,SW2,DW1 plot w. ECMWF
TW3,SW2,DW1 plot w/o ECMWF
Possible C/NOFS contribution interaction between SW1 and SW2
Session: Ambient Ionosphere and Thermosphere (including electrodynamics)
The Earth’s ionosphere and thermosphere are subject to significant variations as a function of solar activity, geographic location, altitude, local magnetic field geometry, and forcing from below. This session will discuss the variation and variability of the ambient ionosphere and thermosphere as well as that of geophysical drivers, including solar effects, geomagnetic activity, electrodynamics, thermal properties, and tidal effects.
SSW 2006 event
Changes in tides with and without planetary wave activity (what I have so far, could be basis)
Increased variability in vertical ExB drift (have runs, needs to look at existing plots, JRO, MH etc stations), also look at average
Changes in SSW response with increase F10.7 number (ionosphere, electric field – need to check if this run can be used from beginning of 2011)
Magnetic perturbation (have Josuke run, but also increase f10.7 run)
Need to focus: what is interesting for the meeting, and with what topic could I have synergy effect.