The OH<sup>*</sup>(3–1) layer emission altitude cannot be determined unambiguously from temperature comparison with lidars

Abstract

Abstract. I investigate the nightly mean emission height and width of the OH * (3-1) layer by comparing nightly mean temperatures measured by the ground-based spectrometer GRIPS 9 and the Na lidar at ALOMAR. The data set contains 42 coincident measurements between November 2010 and February 2014, when GRIPS 9 was in operation at the ALOMAR observatory