Conserved variable analysis of the marine boundary layer and air-sea exchange processes using BOBMEX-Pilot data sets |
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Authors: | N V Sam U C Mohanty A N V Satyanarayana |
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Institution: | (1) Centre for Atmospheric Sciences, Indian Institute of Technology, Delhi, New Delhi, India |
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Abstract: | The present study is based on the observed features of the MBL (Marine Boundary Layer) during the Bay of Bengal and Monsoon
Experiment (BOBMEX) — Pilot phase. Conserved Variable Analysis (CVA) of the conserved variables such as potential temperature,
virtual potential temperature, equivalent potential temperature, saturation equivalent potential temperature and specific
humidity were carried out at every point of upper air observation obtained on board ORV Sagar Kanya. The values are estimated
up to a maximum of 4 km to cover the boundary layer. The Marine Boundary Layer Height is estimated from the conserved thermodynamic
profiles. During the disturbed period when the convective activity is observed, the deeper boundary layers show double mixing
line structures. An attempt is also made to study the oceanic heat budget using empirical models. The estimated short-wave
radiation flux compared well with the observations. |
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Keywords: | Marine Boundary Layer Height (MBLH) Convective Boundary Layer (CBL) Conserved Variable Analysis (CVA) |
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