Saturday, July 23, 2011

Mean Summer Relative Humidity


In summer, the relative humidity remains higher throughout the country and exhibits a different pattern compared to winter. The air contains higher percentage of water vapour during monsoon. But this pattern goes on decreasing towards the west. Thus, eastern region becomes more humid compared to the western. The monsoon wind contains higher amount of water molecules. The temperature of a volume of air decreases and its capacity to hold moisture also decreases and thus relative humidity increases. As we go towards west, water molecules in air decrease, moisture absorbing capacity of air increases and relative humidity decreases.

Types of Climate

Various types of climate are found in Nepal. The geo-physical diversity, altitudinal differences, slope and aspects of land, etc., have resulted in this variation throughout the country. There are five types of major climates in Nepal. The sub tropical climate is found below 1,000 metres and even in higher altitude along the river basins. The southern tarai and river basins have this type of climate where there is hot summer and warm winter. The warm temperate climate is found in the altitude about 1,000 meter to 2,000 merers. The middle hill has this type of climate which is neither hot nor cold throughout the year. The cold temperate climate is found in the altitude about 2,000-4,000 meters. Winter is quite cold while summer remains warm in this type of climate. It is found in upper hill and lower part of the mountain. The alpine climate is found around 4,000 meters altitude. Above the alpine climate, the tundra climate is found where there is snow throughout the year and it remains very cold.







Friday, July 15, 2011

climate change

climate means nature of our around state or place. around as our objectives of hole nature is climate. around us different types of nature. This is changing naturally or according to the human activities. The climate is changing continue according to the human activities.Science has made enormous inroads in understanding climate change and its causes, and is beginning to help develop a strong understanding of current and potential impacts that will affect people today and in coming decades. This understanding is crucial because it allows decision makers to place climate change in the context of other large challenges facing the nation and the world. There are still some uncertainties, and there always will be in understanding a complex system like Earth’s climate. Nevertheless, there is a strong, credible body of evidence, based on multiple lines of research, documenting that climate is changing and that these changes are in large part caused by human activities. While much remains to be learned, the core phenomenon, scientific questions, and hypotheses have been examined thoroughly and have stood firm in the face of serious scientific debate and careful evaluation of alternative explanations.