Physics
Scientific paper
Jan 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004adspr..34..330s&link_type=abstract
Advances in Space Research, Volume 34, Issue 2, p. 330-336.
Physics
12
Lidar Measurements, Mesopause Temperture, Volcanic And Solar Cycle Effects
Scientific paper
The Colorado State University Sodium Lidar has measured temperatures in the mesopause region (80-105 km) for over 11 years. Based on 7 years' observation, an episodic change with a warming of 11.8 K in 1993 at the mean mesopause altitude of 98 km, attributable to Mt. Pinatubo eruptions, was reported. In this paper, we focus on the solar cycle effects. With 11 years of data, we observed a maximum solar response of 0.06 K/SFU at 99 km, which decreases at lower and higher altitudes to nearly zero and appears to change sign at ~82 and ~104 km. The phase changes are consistent with earlier midlatitude observation with incoherent scatter radar above and Rayleigh lidar below the altitudes reported here, providing clear experimental evidence of dynamical influences throughout different layers of Earth's atmosphere. We discuss the altitude dependence of response amplitudes and the effect of volcanic and solar flux variability have on the mesopause region temperatures, as well as long-term temperature trends.
Krueger David A.
She Chiao Yao
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