Density and temperature profiles obtained by lidar between 35 and 70 km

Daytime measurements of atmospheric temperature profiles (2-15 km) by lidar utilizing Rayleigh-Brillouin scattering.

In this Letter, we report on a novel method for measuring atmospheric temperature profiles by lidar during daytime for heights of 2-15.3 km, with a vertical resolution of 0.3-2.2 km, using Rayleigh-Brillouin scattering. The measurements are performed by scanning a laser (λ=355 nm) over a 12 GHz range and using a Fabry-Pérot interferometer as discriminator. The temperature is derived by using a ...

examining the relationship between fear of negative evaluation and communication strategies by iranian efl learners

the purpose of the present study was to investigate the relationship between fear of negative evaluation (fne) and communication strategies (css) among iranian efl learners. it was aimed to examine the differences in the use of communication strategies between speakers with high or low degree of fear of negative evaluation. the current study was a case study consisting of 10 english learners at...

Vertical Resolution of Temperature - Profiles Obtained

the relationship between individual versus pair writing tasks and levels of fluency, complexity and accuracy in efl writing by iranian learners

پژوهش کنونی با هدف مطالعه رابطه بین نوشتار بصورت انفرادی و گروهی با میزان دقت، پیچیدگی و سلاست دانش آموزان زبان انگلیسی حین نگارش متون انجام شده است. بمنظور دستیابی به این هدف، دو گروه از دانش آموزان مقطع متوسطه موسسه زبان کیش انتخاب شده و سپس از آنها خواسته شد تا 6 متن را با 6 موضوع متفاوت و طی 6 جلسه به نگارش در آورند. تجزیه و تحلیل این پژوهش با هدف اندازه گیری میزان دقت، پیچیدگی و سلاست نوشت...

Temperature lidar measurements from 1 to 105 km altitude using resonance, Rayleigh, and Rotational Raman scattering

For the first time, three different temperature lidar methods are combined to obtain time-resolved complete temperature profiles with high altitude resolution over an altitude range from the planetary boundary layer up to the lower thermosphere (about 1–105 km). The Leibniz-Institute of Atmospheric Physics (IAP) at Kühlungsborn, Germany (54 N, 12 E) operates two lidar instruments, using three d...