Preprints
https://doi.org/10.5194/amt-2022-34
https://doi.org/10.5194/amt-2022-34
 
10 Feb 2022
10 Feb 2022
Status: a revised version of this preprint is currently under review for the journal AMT.

Locations for the best lidar view of mid-level and high clouds

Matthias Tesche1 and Vincent Noel2 Matthias Tesche and Vincent Noel
  • 1Leipzig Institute for Meteorology, Leipzig University, Stephanstraße 3, 04103 Leipzig, Germany
  • 2Laboratoire d’Aérologie, CNRS/UPS, Observatoire Midi-Pyrénées, 14 avenue Edouard Belin, Toulouse, France

Abstract. Mid-level altocumulus clouds (Ac) and high cirrus clouds (Ci) can be considered as natural laboratories for studying cloud glaciation in the atmosphere. While their altitude makes them difficult to access with in-situ instruments, they can be conveniently observed from ground with active remote-sensing instruments such as lidar and radar. However, active remote sensing of Ac and Ci at visible wavelengths with lidar requires a clear line of sight between the instrument and the target cloud. It is therefore advisable to carefully assess potential locations for deploying ground-based lidar instruments in field experiments or for long-term observations that are focussed on mid-level or high clouds. Here, observations of clouds with two spaceborne lidars are used to assess where ground-based lidar measurements of mid- and upper level clouds are least affected by the light-attenuating effect of low-level clouds. It is found that cirrus can be best observed in the tropics, the Tibetan plateau, the western part of North America, the Atacama region, the southern tip of South America, Greenland, Antarctica, and parts of western Europe. For the observation of altocumulus clouds, a ground-based lidar is best placed on Greenland, Antarctica, the western flank of the Andes and Rocky Mountains, the Amazon, central Asia, Siberia, western Australia, or the southern half of Africa.

Matthias Tesche and Vincent Noel

Status: final response (author comments only)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on amt-2022-34', Anonymous Referee #1, 07 Apr 2022
    • AC1: 'Reply to Referee comments', Matthias Tesche, 18 May 2022
  • RC2: 'Comment on amt-2022-34', Anonymous Referee #2, 20 Apr 2022
    • AC1: 'Reply to Referee comments', Matthias Tesche, 18 May 2022

Matthias Tesche and Vincent Noel

Matthias Tesche and Vincent Noel

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Short summary
Mid-level and high clouds can be considered as natural laboratories for studying cloud glaciation in the atmosphere. While they can be conveniently observed from ground with lidar, such measurements require a clear line of sight between the instrument and the target cloud. Here, observations of clouds with two spaceborne lidars are used to assess where ground-based lidar measurements of mid- and upper level clouds are least affected by the light-attenuating effect of low-level clouds.