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21.450  Articles
1 of 2.145 pages  |  10  records  |  more records»
Hourly values of the critical frequency of the ionospheric F region, foF2, obtained at Chongqing ionospheric observatory(geographic 29.50N, 106.40E), China, during the interval of 1977 to 1997 (solar cycle 21 and 22) havebeen used to investigate the depen... see more

Background: Seasonality of births in Nigeria has been previously addressed in a small number of studies. This study was designed to explore and describe the regional variations in the seasonality of births in Nigeria.Data Source and Methods: A total of 82... see more

The quality of rainfall data is highly significant in disaster analysis, ecology, and water resource management. However, the accuracy and quantity of rain gauges are often inadequate, especially for analyzing extreme events, including the Makassar City f... see more

The present study investigated the ecological status of Opa reservoir, Obafemi Awolowo University, Ile Ife, Nigeria, based on the spatial and temporal variations in abundance and distribution of zooplankton. 72 samples were collected monthly with a quanti... see more

The monthly variability of Aerosol Optical Depth at 0.50 µm (AOD0.50) and Ångström exponents (AE) based on spectral AODs over an Aerosol Robotic Network (AERONET) site Pokhara are analyzed by using aerosol data of the year 2017. The AOD0.50 are chara... see more

Geomagnetic field observations from 4 magnetic observatories located in Southern Africa located at Hermanus (HER), Hartebeesthoek (HBK), Keetmanshoop (KMH) and Tsumeb (TSU) have been analysed with the main purpose to identify abrupt secular variation chan... see more

The seasonal dynamics of tick Amblyomma cohaerens on naturally infested cattle in Jimma Zone was studied from September 1998 to September 2000 using fifty cattles in five Localities. Monthly tick counts were made for two consecutive years. Although, Ambly... see more

In this investigation, the climatological characteristics of ozone over Irene (25.5º S, 28.1º E) are studied with the aid of both ground-based and satellite observations. The principle aim of this work is therefore to examine the variability of vertical o... see more

The monthly average temperature series of Quetta – Pakistan from 1950 – 2000 is examined. A straight line is fitted to the data and seasonal variation and trend in temperature for each month of the year were obtained. An overall model is constructed as la... see more

1 of 2.145 pages  |  10  records  |  more records»