The wind speed tends to decrease after sunset because at night the surface of the Earth cools much more rapidly than does the air above the surface. During the day it is very easy for the air to mix and cause surface gusts. If there is a low pressure area or storm in the region the winds will blow day or night.

Sea-breeze circulations most often occur on warm sunny days during the spring and summer when the temperature of the land is normally higher than the temperature of the water. During the early morning hours, the land and the water start out at roughly the same temperature.

At night, land looses heat faster than sea. Air upon land becomes cooler and heavier than that upon the sea. The relatively warmer air upon the sea is lighter and therefore it rises while the cooler heavier air at the land flows towards the sea to replace the warm rising air.

Because the air behind the sea breeze is cool and dense, the sea breeze can often act to kill off already-established storms by shutting off their source of fuel. If a storm moves over the sea breeze front.

Explanation: During the day, the land surface heats up faster than the water surface. Therefore, the air above the land is warmer than the air above the ocean. The bottom of the following image illustrates the land breeze that occurs at night.

Land surfaces absorb much more solar radiation than water. Water reflects most solar radiation that reaches its surface back to the atmosphere. Since land absorbs more solar radiation the land surface retains more heat as do the vegetation for energy. Thus, land surfaces warm more quickly than water.

The strength of the sea breeze tends to be strongest from the late morning to the late afternoon since at this time the difference in temperature between the land and ocean is at the greatest.

Why are sea breezes felt during the day and land breezes at night? The land heats and cools faster than the water, causing a land breeze at night and a sea breeze during the day. The land heats and cools faster than the water, causing a land breeze during the day and a sea breeze at night.

During the day, the sun heats up mountain air rapidly while the valley remains relatively cooler. Convection causes it to rise, causing a valley breeze. During the night the slopes get cooled and the dense air descends into the valley as the mountain wind. These breezes occur mostly during calm and clear weather.

Seasonal temperature changes and the Earth’s rotation also affect wind speed and direction.

• Temperature. Air temperature varies between day and night and from season to season due to changes in the heating Earth’s atmosphere.
• Air Pressure.
• Centripetal Acceleration.
• Earth’s Rotation.

The warmer and less dense air near the ground rises during the day pulling more air through the valley floor. This gentle upslope wind known as a valley breeze. The flow of air reverses as the sun is going down and at night. This is because the mountain slopes at higher elevations cool quicker than the valleys.

A valley runs between mountains at the cross-section of the slopes. It is a long gap seen between mountains. Valleys run between hills or mountains, usually, a river flowing through them. Death Valley situated in the USA is a well-known example of a valley.

20 World’s Most Beautiful Valleys

• 1# Khumbu Valley – Nepal.
• 2# Valley of the Ten Peaks – Canada.
• 3# Barun Valley – Nepal.
• 4# Lötschental Valley – Switzerland.
• 5# Kaghan Valley – Pakistan.
• 6# Valley of Flowers – India.
• 7# Kalalau Valley – USA.
• 8# Yosemite Valley – USA.

vales

The tributaries carry water from the hills or mountains that may be far from the main river. When the flood waters spread, they drop lots of soil which has washed down from the hills. The soil that drops on the valley floor makes a flat flood plain. Valleys of this type are very useful for growing food crops.

Since the beginning of human development, valleys have been an important place for people because of their presence close to rivers. Rivers enabled easier movement and also provided resources like water, good soils, and food such as fish.

Erosional valley: A valley formed by erosion. Structural valley: A valley formed by geologic events such as drop faults or the rise of highlands. Dry valley: A valley not created by sustained surface water flow. Longitudinal valley: An elongated valley found between two nearly-parallel mountain chains.

Since a river or stream often flows through a valley, this increases the moisture. This combined with cooler temperatures at night can result in valley fog and clouds. If an inversion is in place, the fog, clouds and/or smog can persist in the valley during the day. Strong wind events can occur in a valley.

Why so Hot? The depth and shape of Death Valley influence its summer temperatures. The valley is a long, narrow basin 282 feet (86 m) below sea level, yet is walled by high, steep mountain ranges. These moving masses of super heated air blow through the valley creating extreme high temperatures.

Air molecules don’t move around as much in cold air. They are packed more tightly together. As the ground begins to radiate heat into the atmosphere, the air temperature cools and the colder, more dense air slides down the mountain slopes into the valley below.

It tends to keep higher elevations relatively warmer while the valleys become much colder. Additionally, cool air on the hills will fall into the neighboring valleys because it is more dense than the surrounding warm air.

It has more to do with air pressure. Like all gases, the air in our atmosphere is a poor conductor—because it’s not dense with particles. However, the atmosphere does have mass. So, even though they’re closer to the sun, thin air in the mountains keeps them colder than the thicker air in the lowlands surrounding them.

Valley Inversions Cold air is dense. It drains from higher elevations to lower elevations and hugs as close to the ground as possible. This makes valleys especially vulnerable to inversions in the winter. These inversions occur when cold air gets trapped in the valley and a layer of warm air seals it from above.

Answer: Canada is colder than Mexico.