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Student BIOS

BHAUTMAGE Utkarsh Prakash

PhD Candidate in Environmental Science, Policy and Management

M.Tech (Master of Technology) in Environmental Engineering, Indian Institute of Technology Guwahati, India
B.Tech (Bachelor of Technology) in Civil Engineering, Visvesvaraya National Institute of Technology Nagpur, India.

Email: upbhautmage@ust.hk

Supervisor:  Prof. FUNG Jimmy       Co-Supervisor: Prof. LAU Alexis

Research Topic  
Inclusion of the Urban Momentum and Thermal Drag Effect within the ACM2 PBL Scheme in the WRF Model to Obtain Wind Profile over the Cities
Keywords  
Weather research forecast, Urban meteorology modeling, Asymmetric convective model, Planetary boundary layer, Pearl River delta, Air pollution
Abstract  

A realistic representation of the planetary boundary layer (PBL) structure and its periodic evolution is crucial for better numerical simulation and forecasting of the regional meteorological conditions and air pollutant dispersion. Various PBL schemes (local and non-local) have been integrated in the Weather Research and Forecasting (WRF) model to incorporate the governing turbulence within the PBL. In addition, these schemes are tied to the different land surface models to account the heat and moisture fluxes evolved from the earth’s surface. A few years back, the urban models such as UCM (Urban Canopy Model), BEP (Building Effect Parameterization) and BEM (Building Energy Model) have been developed and included within the WRF model. The motive behind this was to enhance the representation of the urban surface phenomenon such as the heat island effect and the turbulence caused due to the complex built urban structures these days e.g. street canyons. This has improved the PBL structure creation over the urban cities worldwide. However, the widely used BEP-BEM model these days, which runs in parallel with the WRF model increases the computational requirements and the simulation time additionally.

In the recent years, the performance of the four PBL schemes, namely MYJ, Boulac, YSU and ACM2 has been analyzed over the Pearl River Delta (PRD) region in the Southern China. From the results, it was concluded that the non-local ACM2 scheme has shown good agreement with the observation of the meteorological field variables and the PBL height over the Hong Kong city. In this research, an attempt has been made to include the related governing urban physics within the ACM2 PBL scheme itself by modifying it. It is expected that performing simulations over the complex urban structure cities like Hong Kong with the newly modified ACM2 scheme will produce the vertical profile of the horizontal wind-speed as well as the urban roughness sublayer turbulence characteristics both of which are critical for the air pollutant dispersion within less computational time.

Conference Paper
Chun Yin DY, Utkarsh Prakash Bhautmage, Mau Fung Wong, Jimmy C. H. Fung, Alexis Lau (2017) Inclusion of Urban Momentum and Thermal Drag Effect into the ACM2 WRF PBL Scheme to Obtain Wind Profile over the Cities: Sensitivity Study, The 5th International Symposium on Regional Air Quality Improvement in Rapidly Developed Economic Regions, Guangzhou, China.
Utkarsh Prakash Bhautmage, Jimmy C. H. Fung, Alexis Lau (2017) Evaluation of Mesoscale Numerical Weather Prediction WRF Model's Performance by Analyzing the Kinetic Energy Spectra Behaviour , The 5th International Symposium on Regional Air Quality Improvement in Rapidly Developed Economic Regions, Guangzhou, China.
Presentations/Talks
Title Date Length Type and Location
Evaluation of Mesoscale Numerical Weather Prediction Model’s Performance by Analyzing Kinetic Energy Spectrum Behavior 2016-05-09 25 min. Department Seminar
Inclusion of the urban physics within the PBL scheme to obtain speedy capture of the PBL structure evolution over the cities 2017-03-08 20 min. Department Seminar
Inclusion of the Urban Momentum and Thermal Drag Effect within the ACM2 PBL Scheme in the WRF Model to Obtain Wind Profile over the Cities 2017-10-18 45 min. Department qualifying exam oral defense
Teaching Assistant
Semester Course Code Course Title Class Size
2015-16 Spring ENVR 6040D Corporate Environmental Strategy 25
2016-17 Fall ENVR 2030 Material and Energy Balance for Environmental Management 39
Extracurricular Activities/Volunteer Work
Type Position Held Participation Period Name of Organization
Parallel LES Modeling Workshop, CUHK, Hong Kong Participant 2015-09-21 to 2015-09-25 Institute of Meteorology and Climatology, Leibniz Universitat Hannover
Training Workshop on Aviation Research Demonstration Project (AvRDP), CUHK, Hong Kong Participant 2016-07-20 to 2016-07-22 World Weather Research Programme of the World Meteorological Organization (WMO WWRP), Hong Kong Observatory (HKO)
WMO WWRP 4th International Symposium on Nowcasting and Very-short-range Forecast, CUHK, Hong Kong Participant 2016-07-25 to 2016-07-29 World Weather Research Programme of the World Meteorological Organization (WMO WWRP), Hong Kong Observatory (HKO)
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