Online ISSN: 2515-8260

Keywords : Boundary Layer


CUSTOMIZATION OF WEATHER RESEARCH FORECAST (WRF) MODEL BY CONDUCTING THE NUMERICAL SIMULATION ANDSENSITIVITY EXPERIMENT OF PBL SCHEMES OVER GURUGRAM

Neelam Sharma; Rahul Boadh; Ravendra Singh

European Journal of Molecular & Clinical Medicine, 2020, Volume 7, Issue 9, Pages 892-914

The present study has been conducted for analysis the performance of five dissimilar
Planetary Boundary Layer (PBL) parameterizations schemes [Mellor-Yamada-Janjic
(MYJ), Mellor-Yamada-Nakanishi-Niino (MYNN), Asymmetric Convective Model
(ACM2), Yonsei University (YSU) and Quasi Normal Scale Elimination (QNSE)] in the
WRF model (version 4.1) over a tropical site Gurugram (28.4595° N, 77.0266° E). January
(winter), April (summer), August (monsoon) and November (post monsoon) have been
used as season’s representative month in the present study according to India
Meteorological Department (IMD). The five days (12-17, 2017) in each study month have
beencarefully chosen as non-synoptic activity days (clear weather days) for reproduction
and identification of vertical variables as well as meteorological variables from WRF with
high resolution (3 km in inner most domain) and 31 vertical levels. For the model
validation, the meteorological variables observation during the study period collated from
near airport station and upper radiosonde observations obtained from University of
Wyoming (http://weather.uywo.edu/upperair/sounding.html).After carefully examination,
it has been originated that many parameters well performed by YSU and YSU followed by
MYJ and ACM2 schemes produced better comparisons with observations.A statistical
investigationcreatedby using four different errors methods such as correlation coefficient,
mean bias, root mean square and mean bias exposedfinestpresentation of YSU tracked by
MYJ and ACM2 schemesfor integrating various vertical thermal structure parameters over
Gurugram. Within the restrictions, this study advised that YSU trailed by one non-local
ACM2 and one local MYJ schemes PBL turbulent dispersal parameterizations of weather
research model are suitable over Gurugram.