Naslov
Relationship between thermospheric NO infrared emission and both solar wind parameters and geomagnetic indices within the period from 25 January 2005 to 5 May 2005
(Relationship between thermospheric NO infrared emission and both solar wind parameters and geomagnetic indices within the period from 25 January 2005 to 5 May 2005)

Autori
Verbanac, Giuliana ; Ivanković, Ljiljana ; Bandić, Mario

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, ostalo, znanstveni

Skup
16th European Space Weather Week

Mjesto i datum
Liège, Belgija, 18.11.2019. - 22.11.2019

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
thermosphere ; NO emission ; TIMED satellite ; high- speed solar wind streams (HSS) ; geomagnetic indicesirb

Sažetak
We investigate thermospheric responses to high- speed solar wind streams (HSS) within the period from 25 January 2005 to 5 May 2005 by applying the cross-correlation (CC) analyses. This time span is characterized by three equatorial coronal holes (CH). In the lower thermosphere, nitric oxide (NO) is the most important constituent for energy loss by emission of infrared radiation. Emitted zonal infrared power for NO is obtained from SABER instrument on board TIMED, and integrated per 6 latitudinal bins to obtain zonal average fluxes. Following parameters are used: solar wind parameters B (interplanetary magnetic field, IMF), BV (V is solar wind velocity), BsV (Bs is the southward component if the IMF Bz component in GSM coordinate system), Newell function that takes into account different physical processes related to the magnetospheric activity, and geomagnetic indices AE and Dst. The strongest/weakest thermospheric response to HSS is observed at high/low latitudes. Maximal CC is obtained between Newell function and NO, and AE index and NO. Time of thermospheric response is estimated to be between 6 and 15 hours, depending on the parameter and latitudinal bins. Spectral analysis has revealed a period of 9.1 days for all investigates quantities - evidence that CHs and HSSs were source of thermospheric disturbances here quantified with NO infrared emission.

Izvorni jezik
Engleski

Znanstvena područja
Fizika, Geofizika

POVEZANOST RADA