STUDY OF THE MORPHOLOGY OF NA AND K LAYER ON MLT REGION Andrioli, - - PowerPoint PPT Presentation
STUDY OF THE MORPHOLOGY OF NA AND K LAYER ON MLT REGION Andrioli, Vania F.; Batista, Paulo P.; Pimenta, Alexandre A.; Savio, Siomel; Fagundes, Paulo R.; Xu, Jiyao; Yang, Guotao; Jing, Jiao; Cheng, Xuewu; Wang, Chi; Liu, Zhengkuan OVERVIEW
Andrioli, Vania F.; Batista, Paulo P.; Pimenta, Alexandre A.; Savio, Siomel; Fagundes, Paulo R.; Xu, Jiyao; Yang, Guotao; Jing, Jiao; Cheng, Xuewu; Wang, Chi; Liu, Zhengkuan
Signal acquisition and control room LASER beams
YAG Laser 1064 nm Dye Laser Optical Bench Dye laser pump
Telescope
589 nm (Na) 770 nm (K) FM 532 nm China – Brazil Joint Laboratory for Space Weather
Source: http://www.huffingtonpost.com/2014/04/21/lyrid-meteor-shower- 2014_n_5186204.html http://www.chem.leeds.ac.uk/en/john-plane/modelling/mesosphere/current-research/metal- layers.html
0,00 20,00 40,00 60,00 80,00 100,00 120,00 140,00 nov/16 dec/16 jan/17 Feb/17 mar/17 Apr/17 May/17 jun/17 jul/17 ago/17 set/17 out/17 nov/17 dec/17 jan/18 fev/18 mar/18 abr/18
Hours of observation Na/K LIDAR – China-Brazil Joint Lab : Total 686 hours
~ 9 km
~ 9 km
50 100 150 200 250 300 350 400 80 85 90 95 100
K Density peak height on 25/04/2017 Peak height (km) Time (15 min average) Peak height Linear Fit Y(x) = 94 - 0.014 x
50 100 150 200 250 300 350 400 80 85 90 95 100
Na Density Peak Height - 25/04/2017 Peak Height (km) Profile number (15 min averaged) Na Height Peak Linear Fit Y(x) = 97 - 0.016 x
Phase speed ~ 900 m/h Influency of the waves and instabilities on the morphology of the Na and K layers
Zonal Diurnal = 23.5 km Semidiurnal = 18 km Meridional Diurnal = 28 km Semidiurnal = 16 km
SJC Na LIDAR (2007-2008)
structure
tendency
and 76 on K.
to dynamical effects
Month/year Events/total
Sep/2007 4/6 Oct/2007 3/5 Feb/2008 1/1 Mar/2008 5/8 Apr/2008 3/6 May/2008 9/12 Jun/2008 5/7 Jul/2008 10/13 Aug/2008 8/8 Sept/2008 7/10 Oct/2008 5/5
Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 80 85 90 95 100
K (cm
Monthly mean K density Month
Altitude (km)
25 50 75 100 125 150 175 200
Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 80 82 84 86 88 90 92 94 96 98 100 Na (cm
2017 Monthly Averaged Na density Time (month)
Altitude (km)
750 1500 2250 3000 3750 4500 5250 6000
83 nigths observation; ~ 550 hours in 2017
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 3.0x10
3
6.0x10
3
9.0x10
3
1.2x10
4
1.5x10
4
1.8x10
4
2.1x10
4
Month Averaged of K total abundance for 2017 Monthly mean K Abundance (cm
Month
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 1x10
5
2x10
5
3x10
5
4x10
5
5x10
5
6x10
5
7x10
5
Monthly averaged Na density abundance for 2017 Abundance (cm
Time
70 80 90 100 110 20 40 60 80 100 120
K Centroid
Data: Data1_Aver Model: Gauss Chi^2/DoF = 5.60134 R^2 = 0.99295 y0 11.80564 ±0.1182 xc 90.36812 ±0.01688 w 8.09064 ±0.03677 A 941.09979 ±4.2463
K Density (cm
Altitude (km)
80 85 90 95 100 105 1000 2000 3000
2017 Na centroid
Data: monthly_Averaged Model: Gauss Chi^2/DoF = 5095.27422 R^2 = 0.99245 y0
±19.48213 xc 91.83013 ±0.02163 w 10.47176 ±0.10428 A 32838.67447 ±518.68968
Na Density (cm
Altitude (km)
83 nigths observation; ~ 550 hours in 2017
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec J 86 88 90 92 94 6.0 6.5 7.0 7.5 8.0 8.5 9.0
Monthly averaged of centroid and layer width for K in 2017 Altutide of centroid (km) Month Layer width (km)
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 90 92 94
centroid Avareged centroid (km)
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 8 12 16 20
Sodium Seasonal layer width and Centroid distribution SJC 2017 Layer Width (km)
W = 8 km W = 10.5 km
processes mainly due to atmospheric tides
around June and October;
June;
but both presented a descending “trend”