Atmospheric Sciences

Weather changes primarily occur in the troposphere, which is the lowest layer of the Earth's atmosphere, extending up to about 10-15 kilometers in altitude. This layer contains most of the Earth's weather systems and is where temperature decreases with altitude.

The state of the atmosphere near Earth at a given time and place is called weather. It includes factors such as temperature, humidity, wind speed, and precipitation.

The convection cells radiate heat.

the mixture of invisible gases that surround earth

Oxygen was absent from Earth's early atmosphere because the planet's early life forms did not yet produce oxygen through photosynthesis. It wasn't until photosynthetic organisms like cyanobacteria evolved and began releasing oxygen as a byproduct that levels of oxygen in the atmosphere started to increase. This process took millions of years to significantly change the composition of Earth's atmosphere.

The layer of the atmosphere that has breathable air is the troposphere. This is the layer closest to the Earth's surface, extending up to about 10-15 kilometers in altitude, where most of our weather occurs and where humans and other living organisms get the oxygen they need to survive.

Warm regions near the equator can hold the most moisture in the air due to higher temperatures and humidity levels. This results in higher water vapor content and potential for precipitation.

The atmosphere of Earth changed over millions of years due to volcanic activity releasing gases, the development of photosynthetic organisms producing oxygen, and the evolution of plants that further increased oxygen levels and reduced carbon dioxide. These changes led to the composition of the atmosphere we have today with a balance of gases crucial for supporting life.

The mesosphere plays a role in protecting Earth from space debris by burning up meteors that enter the atmosphere. It is also where most meteoroids disintegrate before reaching the surface, creating shooting stars. Additionally, the mesosphere is where the coldest temperatures in Earth's atmosphere are found.

The revolution of the Earth causes changes in seasons, as different parts of the planet receive varying amounts of sunlight throughout the year. The tilt of the Earth on its axis is responsible for the changing angle at which sunlight hits the Earth's surface, creating the seasons and affecting temperatures around the globe.

These gases were likely present in Earth's early atmosphere due to volcanic activity releasing them, as well as impacts from asteroids and comets during the planet's formation. Chemical reactions between these gases played a vital role in the formation of the Earth's atmosphere as we know it today.

The average yearly rainfall amounts for these Oregon cities are as follows: Salem - 40 inches, Pendleton - 12 inches, Eugene - 40 inches, Redmond - 8 inches, Medford - 18 inches, and Lakeview - 12 inches. These numbers can vary from year to year.

Entrapped water on land moves into the atmosphere through the process of evaporation. The heat from the sun causes the water to turn into vapor, which rises into the atmosphere. This water vapor can then condense to form clouds and eventually fall back to the land as precipitation.

There is more oxygen in the soil compared to the atmosphere because oxygen is consumed by plants and microorganisms in the soil through respiration and other processes. Additionally, physical factors like soil porosity and the presence of air pockets can help oxygen diffuse into the soil. Overall, the biological and physical characteristics of soil contribute to higher oxygen levels compared to the atmosphere.

A particle of rock that survives a fall through Earth's atmosphere is called a meteorite. It is a solid object that enters Earth's atmosphere from space and reaches the surface without completely burning up. Meteorites can provide valuable information about the history and composition of our solar system.

The main gases responsible for trapping heat in the Earth's atmosphere are carbon dioxide (CO2), methane (CH4), and water vapor (H2O). These gases are known as greenhouse gases and they create a "greenhouse effect," which helps regulate the Earth's temperature. Excessive accumulation of these gases due to human activities contributes to global warming.

One day-to-day change in the Earth's atmosphere is the variation in temperature due to the daily cycle of sunlight and darkness. This results in warmer temperatures during the day and cooler temperatures at night. Additionally, changes in wind speed and direction, humidity levels, and air pressure can also vary on a daily basis.

Meteorologists refer to water vapor in the atmosphere as humidity. Humidity levels are important to understanding weather patterns and are often measured as relative humidity, which expresses how much moisture the air is holding compared to the maximum amount it can hold at a given temperature.

Fifty percent of the gases that make up the atmosphere are found below the altitude of about 5.6 kilometers (18,000 feet). This is also known as the tropopause, which is the boundary between the troposphere and the stratosphere.

Gases like oxygen and methane were absent from early Earth's atmosphere but exist today. The increase in oxygen levels can be attributed to photosynthetic organisms, while methane is released through processes like decomposition and digestion in modern environments.

The temperatures in the mesosphere vary mostly by altitude (and of course by season and latitude).

The temperature of the upper mesosphere may fall as low as −101 °C (172 K; −150 °F).

The temperatures in the lower mesosphere tend to be around the freezing point of water: 0 °C (273 K, 32 °F)

Meteorologists refer to water vapor in the atmosphere as humidity. Humidity plays a crucial role in weather forecasting and determining the likelihood of precipitation. Weather conditions such as temperature and pressure influence the amount of water vapor that the air can hold.

The Earth's atmosphere is divided into five major layers: the troposphere, stratosphere, mesosphere, thermosphere, and exosphere. Each layer has distinct characteristics and plays a specific role in protecting and regulating our planet.

Clouds play a crucial role in Earth's climate by reflecting sunlight back into space, which helps cool the planet. They also trap heat emitted by the Earth, acting as a blanket to keep the planet warmer.

When atmospheric pressure falls suddenly at a place, it typically indicates an approaching low-pressure system or storm. This can lead to changing weather conditions, such as strong winds, precipitation, and potentially severe weather like thunderstorms or hurricanes. People may experience symptoms such as headaches or joint pain due to the change in pressure.