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Annual Weather (july 2007 to June 2008)

M.S. Islam
Chief Scientific Officer
Plant Physiology Division, BRRI, Gazipur

P.K.S. Roy
Chief Scientific Officer
BRRI Regional Station , Comilla

S.K. Zaman
Chief Scientific Officer
BRRI Regional Station , Sonagazi

M.A.T. Mia
Chief Scientific Officer
BRRI Regional Station , Rajshahi

M.A. Saleque
Principal Scientific Officer
BRRI Regional Station , Barishal

Abstract/ Executive Summary:

Weather is an instantaneous state of the atmosphere. It influences plant growth and its yield directly. It also influences plant growth and its yield by influencing the incidence of pest and diseases. Therefore, weather data collection, compilation and reporting are being continued for BRRI Agrometeorology Stations at BRRI headquarter (HQ) Gazipur and Regional Stations (RS) Barisal, Comilla, Rajshahi and Sonagazi. All the climatic factors seemed to be slightly higher compared to that of previous year. Unlike other stations drought occurred during October to May in Rajshahi. The prevailing higher maximum and minimum temperatures during November to March compared to last year did not cause spikelet abortion and severe sterility for the early growing rice crops in any part of the country. The monsoonal rainfall pattern showed normal occurrence unlike tendency to early occurrence in the last year.

Keywords: Weather, Air temperature, Rainfall, Solar radiation, Sunshine hours, Relative humidity, etc

Location: Plant Physiology Division, BRRI, Gazipur, and Regional Stations (RS) Barisal, Comilla, Rajshahi and Sonagazi.

Start Date: 01-07-2007

End Date: 30-06-2008

Program Area: Crop-Soil-Water Management

Commodity:

Objectives:

Weather data collection, compilation and reporting are being continued for BRRI Agrometeorology Stations at BRRI headquarter (HQ) Gazipur and Regional Stations (RS) Barisal, Comilla, Rajshahi and Sonagazi.

Methodology:

Weather data such as air temperature, rainfall, solar radiation, sunshine hours, relative humidity, etc were taken manually in BRRI headquarter (HQ) Gazipur and Regional Stations (RS) Barisal, Comilla, Rajshahi and Sonagazi.

Source of Information: Proceedings of the BRRI Annual Internal Review for 2007- 2008

Article Link (Online Journal):

Funding Source:

1. Government

Budget:

Total Budget (Tk.) :

Achievement/Findings:

The monthly mean maximum temperature was the highest in April in all the BRRI Agrometeorology stations at BRRI headquarter (HQ) and two other Regional stations (RS) except Barisal where it was occurred in May. The lowest monthly mean maximum temperature was recorded in January in all the stations except Rajshahi where it was occurred in February in Rajshahi. The monthly mean minimum temperature was the lowest in January in all the Agrometeorology stations. The monthly mean minimum temperature remained below 20^oC in November, December, January and February in all the stations except in November in Barisal. The higher minimum and maximum temperatures during November to February compared to last year causing no spikelet abortion and severe grain sterility for the very early growing rice crops in any part of the country. The annual rainfall total varied from 1258 mm in Rajshahi to 3072 mm in Sonagazi. The highest monthly total rainfall of 1072 mm was recorded in July in Sonagazi followed by 688 mm in Gazipur and 667 mm in Comilla. Drought prevailed in December, January, February, March and April in all the stations, in November in Gazipur, in October, November and in May in Rajshahi and in May in Sonagazi because of lesser amount of rainfall than evaporation in those months. The highest solar radiation was recorded in April in Gazipur, in May in Rajshahi and in June in Barisal and it varied from 445 Cal/cm²/day in Rajshahi to 495 Cal/cm²/day in Barisal. The monthly mean relative humidity at the morning varied from 72 to 100% over the months and stations. The relative humidity at 12 noon or 2 p.m. varied from 50 to 89% over the months and station.

Knowledge Management: Report/Proceedings