Doppler Lidar observations over a high altitude mountainous site Manora Peak in the central Himalayan region

Phanikumar, DV and Shukla, KK and Naja, M and Singh, N and Sahai, S and Sagar, R and Satheesh, SK and Moorthy, KK and Kotamarthi, VR and Newsom, Rob K (2016) Doppler Lidar observations over a high altitude mountainous site Manora Peak in the central Himalayan region. In: CURRENT SCIENCE, 111 (1). pp. 101-108.

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Abstract

The RAWEX-GVAX field campaign has been carried out from June 2011 to March 2012 over a high altitude site Manora Peak, Nainital (29.4 degrees N; 79.2 degrees E; 1958 m amsl) in the central Himalayas to assess the impacts of absorbing aerosols on atmospheric thermodynamics and clouds. This paper presents the preliminary results of the observations and data analysis of the Doppler Lidar, installed at Nainital. Strong updrafts with vertical winds in the range of similar to 2-4 ms(-1) occurred during the daytime and throughout the season indicating thermally driven convection. On the other hand during nighttime, weak downdrafts persisted during stable conditions. Plan Position Indicator scan of Doppler Lidar showed north-northwesterly winds in the boundary layer. The mixing layer height, derived from the vertical velocity variance, showed diurnal variations, in the range similar to 0.7-1 km above ground level during daytime and very shallow during nighttime.

Item Type:	Journal Article
Publication:	CURRENT SCIENCE
Publisher:	INDIAN ACAD SCIENCES
Additional Information:	Copy right for this article belongs to the INDIAN ACAD SCIENCES, C V RAMAN AVENUE, SADASHIVANAGAR, P B #8005, BANGALORE 560 080, INDIA
Keywords:	Boundary layer; Doppler Lidar; GVAX
Department/Centre:	Division of Mechanical Sciences > Divecha Centre for Climate Change Division of Mechanical Sciences > Centre for Atmospheric & Oceanic Sciences
Date Deposited:	24 Aug 2016 09:15
Last Modified:	24 Aug 2016 09:15
URI:	http://eprints.iisc.ac.in/id/eprint/54400

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