Surface energy and radiation budget over a tropical station: An observational study

Tyagi, Bhishma; Satyanarayana, A. N. V.; Kumar, Manoj; Mahanti, N. C.

doi:10.1007/s13143-012-0037-z

Cited by 27 publications

(20 citation statements)

References 48 publications

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“…Observation data quality checks used in the present study are given by Tyagi et al . (). Rainfall data for the above locations are obtained from the Meteorological Service, Singapore.…”

Section: Methodsmentioning

confidence: 98%

Numerical simulation of seasonal mesoscale atmospheric flow‐field variables using ARW over the Singapore region: impact of land use land cover

Madala

Salinas

Miettinen

et al. 2019

Meteorological Applications

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In the present study, the effect of land use land cover information on the simulation of seasonal planetary boundary layer (PBL) flow‐field variables over the Singapore region is analysed using the Advanced Research Weather Research and Forecasting (ARW) mesoscale model. The results achieved are compared using the standard ARW Moderate Resolution Imaging Spectroradiometer (ARW‐MODIS) global land cover data and a regional land cover map produced at the Centre for Remote Imaging, Sensing and Processing (ARW‐CRISP), Singapore. The high‐resolution simulations are conducted with triple‐nested domains (horizontal grid spacing 27, 9 and 3 km) and 51 unequally spaced vertical sigma levels. The evolution of PBL variables and rainfall are modelled for four seasons (northeast monsoon season, first inter‐monsoon period, southwest monsoon season and second inter‐monsoon period). For the purpose of numerical simulations, 30 days in each season were considered and the model‐simulated variables were validated with in situ available meteorological observations and rainfall at four stations over Singapore. The simulation results highlight the broad variation of the low‐level flow‐field in different seasons. The ARW mesoscale model simulated diurnal trends in surface meteorological variables and rainfall are in better agreement with observations by using the ARW‐CRISP regional land cover map compared to ARW‐MODIS global land cover data. Stronger winds are found during monsoon seasons compared with inter‐monsoon periods. Overall, the results of the present study indicate that regional level air quality monitoring and prediction capabilities around Singapore can be improved by using up‐to‐date land cover products designed to take into account regional land cover characteristics.

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“…Observation data quality checks used in the present study are given by Tyagi et al . (). Rainfall data for the above locations are obtained from the Meteorological Service, Singapore.…”

Section: Methodsmentioning

confidence: 98%

Numerical simulation of seasonal mesoscale atmospheric flow‐field variables using ARW over the Singapore region: impact of land use land cover

Madala

Salinas

Miettinen

et al. 2019

Meteorological Applications

View full text Add to dashboard Cite

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“…Bowen ratio (B) is the ratio between sensible and latent heat flux (Stull, 1988), and the evaporative fraction (EF), defined as ratio between latent heat flux and net radiation, indicates the fraction of net radiation that is partitioned into evapotranspiration (Cellier et al, 1996, Beringer andTapper, 2002) given as variations of SEB parameters and associated changes in surface parameters for the study site have been explained in Tyagi et al (2012), which are still observed for each individual case.…”

Section: Methodsmentioning

confidence: 99%

“…A 32 m tower is established at main campus of Birla Institute of Technology, Ranchi, with six levels of instrumentation (1,2,4,8,16 and 32 m respectively) as part of the Department of Science and Technology, New Delhi, sponsored project "Observational study of land surface atmosphere interaction in the monsoon trough along its active eastern end". Details of employed sensors can be obtained from Tyagi et al (2012).…”

Section: Site Descriptionmentioning

confidence: 99%

Delineation of surface energy exchanges variations during thunderstorm and non-thunderstorm days during pre-monsoon season

Tyagi

Satyanarayana

2015

Journal of Atmospheric and Solar-Terrestrial Physics

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“…Details of employed sensors at the site are given in Tyagi et al . (). The site is having scanty dry patchy grass near the instrumentation area, and having clear fetch towards North West to South directions.…”

Section: Site Descriptionmentioning

confidence: 97%

“…This site also consists of sandy loam soil, which is a mixture of sand (60%), silt (8.7%), and clay (31.3%) (Gupta and Gajbhiye, 2002). Details of employed sensors at the site are given in Tyagi et al (2012). The site is having scanty dry patchy grass near the instrumentation area, and having clear fetch towards North West to South directions.…”

Section: Site Descriptionmentioning

confidence: 99%

Coherent structures contributions in fluxes of momentum and heat at two tropical sites during pre‐monsoon thunderstorm season

Tyagi

Satyanarayana

2013

Intl Journal of Climatology

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An attempt has been made to differentiate percentage contribution of coherent structures (CS) in the turbulent fluxes of heat and momentum during thunderstorm days (TD) and non‐thunderstorm days (NTD) at two tropical sites. Pre‐monsoon months (Marcha to May) fast response data (10 Hz) of wind and temperature at Kharagpur (22°30′N, 87°20′E) for years 2007, 2009, and 2010, and at Ranchi (23°25′N, 85°26′E) for years 2008–2010 have been used. The contributions were calculated after decomposing the time series using wavelet technique by two methods: (1) the method of quadrant analysis for each scale, and (2) the method of zero‐crossing. Contributions of CS in momentum flux are higher in TD than NTD, whereas for heat flux CS contribution is higher for NTD to that of TD at both sites; however, values are different at both sites and by each method as well. Significant percentages of contributions of CS to the total flux are noticed at both the sites.

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Surface energy and radiation budget over a tropical station: An observational study

Cited by 27 publications

References 48 publications

Numerical simulation of seasonal mesoscale atmospheric flow‐field variables using ARW over the Singapore region: impact of land use land cover

Numerical simulation of seasonal mesoscale atmospheric flow‐field variables using ARW over the Singapore region: impact of land use land cover

Delineation of surface energy exchanges variations during thunderstorm and non-thunderstorm days during pre-monsoon season

Coherent structures contributions in fluxes of momentum and heat at two tropical sites during pre‐monsoon thunderstorm season

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