Introduction to Geology and Atmospheric Sciences
Geology
The Earth’s crust occupies 0.6% of the planet’s volume and 0.4% of its total mass. It is remarkably thin compared to the Earth’s radius. The oceanic crust averages about 7 km thick, while the continental crust increases to 35-40 km. Beneath the crust lie the mantle, outer core (both fluid), and the solid inner core at the planet’s center. These layers likely represent different chemical compositions and are classified based on their physical behavior.
The lithosphere, Earth’s rigid outer layer,
Read MoreIntroduction to Ecosystems and the Anthropocene
Ecosystem: A Dynamic Complex
An ecosystem is a dynamic complex of plant, animal, and microorganism communities and their non-living environment interacting as a functional unit. It is also the network of interactions among the living and non-living elements of the system.
Research on these interaction networks showed the need to consider ecosystems as a whole when studying nature. The science behind these studies is called ecology.
Ecology is not:
- A political option
- An ethical approach to nature
- A social
Water and Air Pollution: Sources, Impacts, and Mitigation
Water Pollution
BOD and Eutrophication
BOD (Biological Oxygen Demand): BOD indicates the level of organic pollution in water. Eutrophication occurs when inland waters are contaminated with excessive organic substances. These pollutants, often from discharges, lead to a high concentration of organic nutrients. As these nutrients degrade into inorganic substances, they consume significant oxygen, negatively impacting aquatic life, ecosystems, and water quality.
Wastewater Treatment
Debugging: Two primary
Read MoreAtmospheric Dynamics and Climate Classification
DYNAMIC AIR
The temperature difference between the poles and the Equator, along with Earth’s rotation, drives atmospheric circulation. This circulation involves horizontal air movement parallel to the surface and vertical movement that can reach the top of the troposphere.
LATITUDINAL DISTRIBUTION OF SOLAR ENERGY
The amount of solar energy a location receives depends on:
- The Angle of the Sun: Energy received is greater at smaller, more direct angles.
- Exposure Time: Earth’s axial tilt affects the hours
Earth’s Dynamic Processes: A Comprehensive Overview
1.1 Earth’s Position and Climate
Earth’s Distance from the Sun
The Earth is situated about 150 million kilometers from the sun. Variations in the albedo affect how much solar radiation is reflected: the North and South poles reflect more of the sun’s rays. Water and land behave differently: oceans warm up and cool down more slowly than the continents.
The Atmosphere’s Role
The atmosphere helps to regulate the Earth’s temperature.
Depressions (Low Pressure)
In low-pressure areas, where the pressure descends
Read MoreGlaciers, Wind, and Water: Shaping the Earth’s Surface
Glaciers: Shaping the Landscape
Glaciers currently cover 10% of the Earth’s continental surface. A glacier is a thick mass of ice that moves over land, distinct from an ice floe. There are two main types:
Types of Glaciers
Alpine Glaciers
Found in high-elevation mountain ranges, these glaciers are confined by the surrounding mountain valleys.
Continental Glaciers
Also known as polar ice sheets, these glaciers cover vast areas in polar regions and are not restricted by topography.
Parts of an Alpine Glacier
- The