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Student BIOS

BHAUTMAGE Utkarsh Prakash

PhD in Environmental Science, Policy and Management - 2020

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  
Incorporation of the Urban Thermal and Moisture Components into the PX-Land Surface Model (LSM) within the Mesoscale Weather Research and Forecasting (WRF) Model
Keywords  
Numerical weather prediction, Planetary boundary layer, Urban meteorology modeling, Asymmetric convective model, Land surface model, Air pollution
Abstract  

In the mesoscale Weather Research and Forecasting (WRF) model, few urban modeling options exist such as Urban Canopy Model (UCM), Building Effect Parameterization (BEP), and Building Energy Model (BEM). These models have certain limitations as far as the choice of land surface models (LSM), planetary boundary layer (PBL) schemes, and computational expenses are concerned. The authors Dy et al., (2019) made an attempt to include the urban momentum drag effect for wind speed modeling by developing a new multilayer model with modifications to the non-local Asymmetric Convective Model version 2 (ACM2) PBL scheme. The urban-based ACM2 (UACM) model has shown a significant improvement in wind speed reduction near to the urban ground surface along-with an inflection point in the vertical wind profile at roof level. In this study, urban thermal and moisture components are newly introduced in the PX-LSM combined with the UACM model. The urban street-level surface composition includes the impervious, vegetated, and bare ground fractions. The street and roof surface temperature’s diurnal variation is modelled using the two layer force-restore algorithm. Simple radiation treatment is considered to account shadowing within the streets based on solar zenith angle and building morphology. The heat and moisture fluxes are computed at the street and roof levels together with a simple algorithm for anthropogenic heating. The new UACM model has an advantage of minimal urban morphological parameters requirement, simple formulation, and more efficient execution. The upgraded model is tested with the both idealized and real case WRF simulations over the Pearl River Delta (PRD) region in Southern China. The evaluation demonstrated greatly improved wind and temperature predictions at the urban measurement sites compared to the base ACM2 model.

Award  
Award Name Year
Overseas Research Award 2018
Research Travel Grant 2018
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.
Utkarsh Prakash Bhautmage, Chun Yin Dy, Jimmy C. H. Fung, Alexis Lau (2018) Introduction of the Urban Physics and Morphology into the ACM2 PBL Scheme in the WRF Model to Simulate the Meteorological Conditions over the PRD region in Southern China, The 10th International Conference on Urban Climate (ICUC10) jointly with the 14th Symposium on the Urban Environment (SUE) of the American Meteorological Society (AMS), New York City, USA.
Utkarsh Prakash Bhautmage, Chun Yin Dy, Jimmy Chi-Hung Fung, Jonathan Pleim, Alexis Lau, Adel Hanna (2018) Simulation of the Meteorological Conditions by Introducing the Urban Physics within the PX-LSM and ACM2-PBL Scheme in the WRF Model over the PRD Region in Southern China, 17th Annual Community Modeling Analysis System (CMAS) Conference, Chapel Hill, North Carolina, USA.
Utkarsh Bhautmage*, Jimmy C. H. Fung, Jonathan Pleim, Alexis Lau (2019) Incorporation of the Urban Morphology and Governing Physics Including the Building Anthropogenic Heat Source in the Mesoscale NWP WRF Model's PX-LSM and ACM2-PBL Scheme and its Simulation over the PRD Region in Southern China, 16th Annual Meeting, Asia Oceania Geosciences Society (AOGS), Singapore.
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
Inclusion of the Urban Momentum and Thermal Drag Effect within the ACM2 PBL Scheme in the WRF Model to Obtain Wind and Temperature Profiles over the Cities 2018-03-08 20 min. Department Seminar
Simulation of the Meteorological Conditions by Introducing the Urban Physics within the PX-LSM and ACM2-PBL Scheme in the WRF Model over the PRD Region in Southern China 2019-02-28 15 min Department Seminar
Incorporation of the Urban Morphology and Governing Physics Including the Building Anthropogenic Heat Source in the Mesoscale NWP WRF Model's PX-LSM and ACM2-PBL Scheme and its Simulation over the PRD Region in Southern China 2020-03-12 10 min. Department Seminar
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
2018-19 Fall EVSM 5240 Geographical Information System (GIS) 40
2018-19 Spring ENVR 5290 Climate Change: Science, Policy and Management 15
Outbound Activities
Period Country Institute/Company
2018-05-01 to 2018-10-31 United States of America University of North Carolina at Chapel Hill, NC, USA
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
WRF and WRF-Chem Workshop & Tutorial, HKUST Fok Ying Tung Graduate School campus, Nansha, Guangzhou, China Participant 2015-12-07 to 2015-12-10 Division of Environment (HKUST), US National Center for Atmospheric Research (NCAR)
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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