Development of Direct-Detection Doppler Wind Lidar for Vertical Atmospheric Motion

Shoken Ishii,Kaori Sato,Yasukuni Shibata,Kanna Tominaga,Yoshitaka Jin,Nobuo Sugimoto,Hajime Okamoto,Atsushi Sato,Makoto Aoki,Tomoaki Nishizawa

doi:10.1051/epjconf/202023706006

Abstract

Wind is fundamental in many atmospheric phenomena. Global wind profile observation is important to improve numerical weather prediction (NWP) and various meteorological studies. Wind profile observations are measured mainly by radiosonde networks. A Doppler Wind Lidar (DWL) is a useful remote sensing technique for wind measurement. DWL would provide us with a wind profile having high vertical resolution, low bias, and good precision. The National Institute of Information and Communications Technology (NICT) studies DWL has been developing various DWL. In the paper, we report development of a 355-nm direct-detection DWL and describe recent results of a 2-µm coherent DWL at NICT.

Highlights

Current space-based passive observing systems for wind measurement is limited [1]
A direct-detection Doppler Wind Lidar (DWL) has the advantage that wind measurement can be made any aerosol conditions because it uses the light backscattered by molecules (Rayleigh scattering)
A ground-based 2-μm coherent DWL was developed at National Institute of Information and Communications Technology (NICT) in 2013

Summary

INTRODUCTION

Current space-based passive observing systems for wind measurement is limited [1]. The current space-based passive observing systems have a large coverage area and high temporal and horizontal resolutions but has a low vertical resolution. Lidar (DWL) can provide us with a wind profile with high vertical resolution, low bias, and good precision. A space-based DWL can fill the gap for the current space-based passive observing systems. The European Space Agency (ESA) launched a first space-based DWL called 'Aeolus' for the global wind profile observation in 2018 [3]. Μm coherent DWL for CO2 and wind measurements [7]. We have a plan to make wind measurement around and inside clouds with 355nm direct-detection and 2-μm coherent DWL measurements. We are developing a ground-based direct-detection DWL. We describe development and progress of the two DWLs

DEVELOPMENT of 355-NM DIRECTDETECTION DOPPLER WIND LIDAR

Wind Measurement performance of 355nm direct-detection DWL

VERTICAL WIND MEASUREMENT PERFORMANCE OF 2-μM COHERENT DOPPLER WIND LIDAR

SUMMARY