Mr. Rasheed M. Profile

Rasheed M.

at Sona College of Technology

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Publications (3)

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Proceedings Article | 20 November 2024 Presentation + Paper

Precipitation water at the peak cloud liquid water and surface rainfall

Rajasri Sen Jaiswal, Rasheed M., Neela V. S., M. Siva

Proceedings Volume 13193, 131930H (2024) https://doi.org/10.1117/12.3029008

KEYWORDS: Rain, Water, Clouds, Liquids, Meteorology, Satellites, Surface plasmons, Profiling, Geography, Equipment

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In this paper, the authors attempt, in particular, to find functional relations between surface rainfall and Cloud Liquid Water (CLW), Precipitation Water (PW), and Latent Heat (LH) at the TRMM vertical profiling levels. The investigation shows strong correlations between rainfall and each of these parameters and a combination of all these. The study indicates that the functional relation at the closest TRMM profiling level to the Earth at 0-0.5km (and at all levels), can estimate rainfall accurately. So, the authors suggest designing and installing an instrument at say, 0.5km to measure the PW/CLW/ LH or all of the three parameters. This will estimate rainfall with excellent accuracy. Alternatively, the authors feel the need for establishing functional relations between the surface parameters say, surface pressure (SP), surface temperature (ST), and relative humidity (RH), and the upper-air parameters, viz. CLW, PW, and LH. Such relations will help to estimate rainfall at any location, in two steps- first estimating the upper-air parameters from the surface parameters and then surface rainfall from the latter.

Proceedings Article | 12 September 2021 Presentation + Paper

Climatology of the subtropical high-pressure belt

Rajasri Sen Jaiswal, Siva M., Thirumala Lakshmi K., Rasheed M.

Proceedings Volume 11859, 118590O (2021) https://doi.org/10.1117/12.2597718

KEYWORDS: Meteorology, Climatology, Humidity, Reflectivity, Radar, Troposphere

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In this paper, the authors aim to study a few meteorological elements, viz. rainfall, the freezing level height (HFL), bright band height (BBH), and the bright band intensity (BBI) at the subtropics, with special emphasis on the STHP. The study reveals a stunning finding. Unlike the low latitudes, the bright band height (BBH) lies above the freezing level height (HFL) at the subtropics. Besides, the study shows that as the latitude increases, the probability of BBH>HFL increases. The probability of BBH>HFL is the maximum at the STHP, in comparison to the lower latitudes. The investigation shows that the STHP is not the region of the least rainy belt in the 35N-35S region always. However, in most of the months, and most of the years, it shows very low rain. The study shows the daily, monthly, and yearly variations of rainfall, HFL, BBH, and BBI, and their correlations. The authors aim in particular, to find out if the maximum (minimum) rainfall in this region corresponds to the maximum (minimum) BBI and BBH. The HFL, BBH, and BBI for the period 1999-2002, and 2007-2008 have been obtained from the data product 2A23 of the precipitation radar onboard the Tropical Rainfall Measuring Mission (TRMM) satellite. The rainfall for the period 2004-2008 has been obtained from the data product 2A12 of the Tropical Microwave Imager (TMI) onboard the TRMM. Besides, the authors investigated the surface temperature, surface pressure, relative humidity, and precipitable water over a few locations in the subtropics. The study shows the interrelations of rainfall with surface elements. These surface elements have been obtained from the Integrated Global Radiosonde Archive (IGRA). The study also investigates the impact of the El Nino/La Nina on HFL.

Proceedings Article | 9 October 2019 Presentation + Paper

TRMM-retrieved rainfall mechanism over a few tropical locations

Rajasri Sen Jaiswal, Siva M., Rasheed M., Thirumala Lakshmi K., Sunakshi Jaiswal

Proceedings Volume 11152, 111520Y (2019) https://doi.org/10.1117/12.2532751

KEYWORDS: Clouds, Meteorology, Troposphere, Satellite imaging, Satellites

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Rainfall dynamics has been being one of the least understood topics and has been affecting human civilization since time immemorial. Because of its all-pervading effect on all aspects of the society, starting from the day-to-day living of mankind to agriculture, industry, aviation, weather monitoring, and weather forecast, etc., probably it stands out to be the most significant factor that needs attention. Moreover, change in rainfall pattern all over the world necessitates an investigation of this parameter in-depth. The tropics play an essential role in regulating the atmospheric heat engine. So, the cloud characteristics in this region demand careful attention and understanding. In this paper the authors have investigated rainfall and upper air meteorological elements, viz. the cloud liquid water (CLW), the precipitation water (PW) and the latent heat (LH) derived from the data product 2A12 of the Tropical Microwave Imager (TMI) onboard the Tropical Rainfall Measuring Mission (TRMM) satellite over four tropical locations in India, namely Bangalore (12.97N, 77.59E), Bhubaneswar (20.29N, 85.82E), Calcutta (22.57N, 88.36E), and Gadanki (13.45N, 9.16E). The study shows that the rainfall can be predicted with excellent accuracy based on the cloud liquid water (CLW), the precipitation water (PW), and the latent heat (LH). It is further found out from the investigation that though all these parameters can predict rainfall independently, all the elements put together can predict rainfall with greater accuracy. The paper presents functional relationships between rainfall and these parameters. These relationships can be used for quantitative estimation of rainfall in the data-sparse region. The article also highlights the vertical profile of these parameters starting from the Earth's surface up to 18 km above. The article describes the characterization technique for convective/stratiform dominance on surface rainfall.

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