TY - JOUR
T1 - Trends in the airglow temperatures in the MLT region-part 1
T2 - Model simulations
AU - Huang, Tai Yin
AU - Vanyo, Michael
N1 - Funding Information:
This research was funded by US NSF AGS-1903346 to The Pennsylvania State University.T.-Y. Huang and M. Vanyo acknowledge support from the US NSF AGS-1903346 to The Pennsylvania State University. CO2 gas concentration can be obtained from the NOAA website (http://www.esrl. noaa.gov/gmd/ccgg/trends/), F10.7 from the NASA website (http://omniweb.gsfc.nasa.gov/form/dx1.html), and the Ap index (nT) from the World Data Center for Geomagnetism, Kyoto website (http://wdc.kugi.kyoto-u.ac.jp/kp/)
Funding Information:
Acknowledgments: T.-Y. Huang and M. Vanyo acknowledge support from the US NSF AGS-1903346 to The Pennsylvania State University. CO2 gas concentration can be obtained from the NOAA website (http://www.esrl. noaa.gov/gmd/ccgg/trends/), F10.7 from the NASA website (http://omniweb.gsfc.nasa.gov/form/dx1.html), and the Ap index (nT) from the World Data Center for Geomagnetism, Kyoto website (http://wdc.kugi.kyoto-u.ac.jp/kp/).
Funding Information:
Funding: This research was funded by US NSF AGS-1903346 to The Pennsylvania State University.
Publisher Copyright:
© 2020 by the authors.
PY - 2020/5/1
Y1 - 2020/5/1
N2 - Airglow intensity-weighted temperature variations induced by the CO2 increase, solar cycle variation (F10.7 as a proxy) and geomagnetic activity (Ap index as a proxy) in the Mesosphere and Lower Thermosphere (MLT) region were simulated to quantitatively assess their influences on airglow temperatures. Two airglow models, MACD-00 and OHCD-00, were used to simulate the O(1S) greenline, O2(0,1) atmospheric band, and OH(8,3) airglow temperature variations induced by these influences to deduce the trends. Our results show that all three airglow temperatures display a linear trend of ~-0.5 K/decade, in response to the increase of CO2 gas concentration. The airglow temperatures were found to be highly correlated with Ap index, and moderately correlated with F10.7, with the OH temperature showing an anti-correlation. The F10.7 and Ap index trends were found to be ~-0.7 ± 0.28 K/100SFU and ~-0.1 ± 0.02 K/nT in the OH temperature, 4.1 ± 0.7 K/100SFU and ~0.6 ± 0.03 K/nT in the O2 temperature and ~2.0 ± 0.6 K/100SFU and ~0.4 ± 0.03 K/nT in the O1S temperature. These results indicate that geomagnetic activity can have a rather significant effect on the temperatures that had not been looked at previously.
AB - Airglow intensity-weighted temperature variations induced by the CO2 increase, solar cycle variation (F10.7 as a proxy) and geomagnetic activity (Ap index as a proxy) in the Mesosphere and Lower Thermosphere (MLT) region were simulated to quantitatively assess their influences on airglow temperatures. Two airglow models, MACD-00 and OHCD-00, were used to simulate the O(1S) greenline, O2(0,1) atmospheric band, and OH(8,3) airglow temperature variations induced by these influences to deduce the trends. Our results show that all three airglow temperatures display a linear trend of ~-0.5 K/decade, in response to the increase of CO2 gas concentration. The airglow temperatures were found to be highly correlated with Ap index, and moderately correlated with F10.7, with the OH temperature showing an anti-correlation. The F10.7 and Ap index trends were found to be ~-0.7 ± 0.28 K/100SFU and ~-0.1 ± 0.02 K/nT in the OH temperature, 4.1 ± 0.7 K/100SFU and ~0.6 ± 0.03 K/nT in the O2 temperature and ~2.0 ± 0.6 K/100SFU and ~0.4 ± 0.03 K/nT in the O1S temperature. These results indicate that geomagnetic activity can have a rather significant effect on the temperatures that had not been looked at previously.
UR - http://www.scopus.com/inward/record.url?scp=85085382109&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85085382109&partnerID=8YFLogxK
U2 - 10.3390/ATMOS11050468
DO - 10.3390/ATMOS11050468
M3 - Article
AN - SCOPUS:85085382109
VL - 11
JO - ATMOSPHERE
JF - ATMOSPHERE
SN - 2073-4433
IS - 5
M1 - 468
ER -