Weather and Climate of Himalayan Region of Nepal
This post is about climate of Himalayan Region of Nepal. Not only that we are going discuss here weather of Himalayan region of Nepal as well. It may help you for physical aspects of Himalayan region of Nepal. So, get some information about Himalayan region of Nepal in terms of weather and climate. Because we here in this post describe the Himalayan region of Nepal.
Climate of Himalayan Region of Nepal
As the globe knows that Himalaya is the greatest physical feature of the earth. That is why, Himalaya is climatologically one of its least known areas. physical aspects of Himalayan region of Nepal. Its stupendous size, inaccessibility and its very climate prevent a closer and more detailed look. The loftiest and longest mountain range in’ the world has been climbed but not enough scientific data have yet been recorded. Many of its peaks have still to be named and explored.
Climate is the sum of total meteorological elements that is characterized by the average and extreme condition of the atmosphere over a long period of time at any region. Temperature, wind, moisture including humidity and precipitation, air pressure, and evaporation are the main meteorological elements. Climate of a region can be classified according to interrelated elements such as the amount of rainfall, the temperature, type of vegetation and elevation. The two factors, annual rainfall and temperature are principal elements of climate. The amount of solar radiation coming to the earth and the wind current is the principle determinants of rainfall and temperature.
The surface of the Earth facing towards sun is changing continuously when the earth moves in its orbit. The shift is such that the northern hemisphere gets more radiation in the month between March and September, which is the summer season of northern hemisphere. The southern hemisphere receives more radiation during month’s between September and March i.e. summer of the southern hemisphere.
Rainfall is primarily depended on the amount of moisture in the air. Sea water evaporation is the main source of moisture. The moisture remains in air as vapor until conditions are right for it to condense and fall back to the surface. Warm air can contain more moisture than cool air. There is a general decrease in temperature with altitude and precipitation that can occur when warm air carrying moisture blows to the land of higher elevation.
Climate of Nepal is extremely varied and is controlled by the monsoonal winds and the physiography. It ranges from seasonably humid subtropical to semiarid alpine. In Nepal, monsoon is major source of rainfall in summer and approximately 80% of the total annual total rainfall occurs from June to September and whereas western wind is responsible for winter precipitation and limited precipitation occurs from November to February.
Topography and aspect of mountain slope also make local change in rainfall, wind and temperature. The south slopes have a higher rate of insolation (sun exposure) and usually have higher evaporation rates. As a result, south facing slopes always have less vegetation in comparison with north facing slopes. In Nepal, altitude is the most leading factor of climate. Traveling from south towards North, variation in climate can be experienced as hot, warm, cool, cold, and very cold.
Knowledge of the climate of Himalayan Region of Nepal comes from travelers, migrants, invaders, traders and missionaries who have crossed its high passes for centuries in the course of trade, religion and war; from the thousands of pilgrims who make the arduous journey every year to the sacred places in the Himalaya; and from explorers and mountaineers who have climbed its peaks and studied its topography, geology and natural history.
But these Himalayan journeys have naturally been confined to a few clear periods of good weather before or after the monsoon. Even the Antarctic continent is better known than the Himalaya and systematic climatological data have been recorded for over twdi decades at the South Pole. However, in recent years aerial surveys and meteorological satellites have begun to provide us with the kind of information on the Himalaya we have never had before: its cloud and snow cover, the output of its rivers and the movement of its glaciers and avalanches. These, with the observations made at hill-stations in the foot-hills, have to be used to build up a broad picture of the climatology of the Himalaya.
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Weather over the Himalayan Region of Nepal
The basic patterns of weather and climate over the Himalaya are governed by the summer and winter monsoon systems of Asia. These are often pictured as giant land and sea: breezes which blow across the subcontinent once a year with remarkable regularity. In addition, the Himalaya is affected by subcontinent from west to east in winter. There are two of wet weather in the Himalayan region: the with brought by the ‘western disturbances’ and summer rain by the summer monsoon winds.
The western Himalaya, beyond the reach of the receives most of its precipitation in winter and the cool eastern Himalaya, the heaviest and most the precipitation in summer. The post-monsoon months o and November are the least clouded and most delight the seasons in the Himalaya.
The differential response of land and sea to incor radiation is the primary cause of the monsoons of Asian summer months, the great land mass of Asia gets more than the sea areas to the east and south. A strong low area forms over Pakistan, Afghanistan and Iran pressure areas build up over the north Pacific oceans. Air from the oceanic areas moves in from laden with moisture drawn from the sea. This moist ai towards the heart of Asia, releases part of its moisture appropriate conditions, as rain over the Indian subcontinent the winter months, the Asiatic land mass gets much more.
the adjoining seas and north-east Asia, and becomes of an intense high-pressure system. The cold, dry air moving outwards from the Siberian anticyclone the Asian mainland. A cold, dry autumn is followed and dry spring till the winds shift again.
Broadly speaking, the general air flow at low level south to the north in the summer months, and north area in the winter months. The former is maritime air from Ocean and the latter continental air from the Asian monsoon the upper levels, winds are generally strong easterly and even stronger westerly in winter.
For all the seasonal regularity of the monsoon rainfall, local climates over much of the Himalaya variable; Sometimes for reasons not yet clear, the start to come at the expected time or rainfall over monsoon season may be considerably diminished. By contrast there will be times, when, just as unaccountably, the rainfall is unusually heavy leading often to disastrous floods. The consequences are in either case serious.
Factors affecting weather of Nepal
Climate affects the weather of Nepal. Rainfall and temperature affects the Nepal’s weather.
2. Particle size
Particle size affects the weather of Nepal
4. Mineral composition
Mineral composition also affects the climate and weather of Nepal. Minerals have a variety of stability levels. Those that crystallize at higher temperatures are generally more unstable in the earth’s atmospheric conditions than those that crystallize at lower temperatures. Examples of minerals with low stability (less resistant to weathering) are biotite, amphibious, and olivine. Examples of minerals with a high stability (more resistant to erosion) are potassium feldspar and quartz.
Weathering is directly related to topography. Northeast slopes get less solar radiation, have less evaporation and hence more moisture and more plant activity. River bottoms are wet. High elevations may be affected by frost wedging. Steep slopes may continually strip of soil and vegetation by mass wasting.