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Authors
Affiliations
1 Aryabhatta Research Institute of Observational Sciences, Nainital 263 002, IN
2 Amity University, Noida 201 303, IN
3 Aryabhatta Research Institute of Observational Sciences, Nainital 263 002
4 Centre for Atmospheric and Oceanic Sciences, Indian Institute of Science, Bengaluru 560 012, IN
5 Argonne National Laboratory, Argonne, IL, US
6 Pacific Northwest National Laboratory, Richland, Washington, US
Source
Current Science, Vol 111, No 1 (2016), Pagination: 101-108
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°N; 79.2°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 ~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 ~0.7-1 km above ground level during daytime and very shallow during nighttime.
Keywords
Boundary Layer, Doppler Lidar, GVAX.
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