Chapter 1 Notes: Physical Geography, Spatial, and Environmental Science

Chapter Overview

Course: Physical Geography 2410
Chapter One focuses on Physical, Spatial, and Environmental Science
Setting reference: Royal Observatory Greenwich, London, England (noting historical relevance to geography)
Content framing includes human–environment interactions, spatial patterns, and environmental processes

Careers in Physical Geography

Discussion One: Careers in Physical Geography
- Open date: August 28, 9:30 am
- Due date: September 4, 11:59 pm
- Task: Write a response and respond to one classmate
Career options (as listed):
1) Environmental Consultant: advise on environmental impacts, land-use planning, sustainability; projects include land reclamation, resource management, environmental assessments
2) Geographical Information Systems (GIS) Specialist: analyze spatial data, create maps/models for environmental management, urban planning, natural resource exploration
3) Hydrologist: study distribution, movement, properties of water; address water resources, flooding, water quality; may involve aquifer and watershed assessments
4) Geomorphologist: study landforms, processes, evolution; roles in research, environmental management, hazard assessment
5) Natural Resource Manager: sustainable use of minerals, forests, water; assess availability and impacts of extraction
6) Environmental Scientist: research and assess natural environment; pollution, conservation, climate-change impacts on geology
7) Remote Sensing Analyst: use satellite imagery/aerial photography for environmental monitoring, disaster management, geological mapping
8) Academic/Researcher: university/research institution roles; fieldwork, lab work, publishing papers
9) Urban and Regional Planner: integrate physical geography and geology into sustainable urban development; assess land suitability and natural-hazard risk
10) Geotechnical Engineer: engineering aspects of earth materials; site conditions, foundations, interaction with earth in construction
Employment contexts: government agencies, environmental consultancies, research institutions, NGOs, private industry

Geography Basics: Physical, Human, and Spatial Geography

Geography as a field studies Earth phenomena and their distribution, interrelationships, and spatial interactions
Human Geography: focuses on location, distribution, and spatial interaction of human (cultural) phenomena
Notable cross-disciplinary reference: "Pale Blue Dot"—Voyager 1 (14 Feb 1990) used to frame perspective of Earth within the cosmos

Physical Geography and Interdisciplinary Links

Disciplines interfacing with geography (illustrative mix):
- Astronomy, Sociology, Geology, Meteorology, Climatology, Mathematics, Geography (Physical, Social, Cultural, Historical, Economic, etc.)
Example from text: Dabo Guan and colleagues studied droughts/heat waves for barley under different greenhouse-gas scenarios, published in Nature
- Finding: barley yield expected to fall by between 3% and 17% depending on region; some temperate areas may see yield increases; average price could double
Book reference: "The Geography of Beer: Regions, Environment, and Societies" (Springer) – illustrating cross-disciplinary synthesis between geography, environment, and society

Physical Geography Applications

Key application areas: Meteorology (weather), Climatology (long-term weather patterns), Geomorphology (landforms and processes), Biogeography (plants/animals distribution), Soils (dirt), Fresh Water (supply, demand, access), Oceans, Glaciers
These applications connect to environmental management, resource planning, and hazard assessment

Spatial Approach and Regions

Geography as a Spatial Discipline: studies phenomena as located, distributed, and interacting across Earth space
Regions: areas identified by distinctive characteristics
Boundary concept: “Fuzzy Boundaries” – boundaries that are vague or transitional between zones
Note/example cue: Bernie Movie Clip referenced as an example of fuzzy boundaries

Geography and Technology

Remote Sensing: acquiring information about objects/phenomena without physical contact
Global Positioning Systems (GPS): satellite-based positioning
Drones: aerial data collection for mapping and monitoring
LiDAR (Light Detection and Ranging): high-resolution surface mapping
Cartography: map-making and maps as tools for spatial understanding

Suggested Regions (On the Map)

Panhandle, North Texas, West Texas, Hill Country, Central Texas, East Texas, South Texas, Gulf Coast, Pine Curtain, Rio Grande Valley

Boundary Drawing Exercise

Task: Draw a boundary and label regions such as The South, Southwest, The West, Midwest, Northeast

Campus/Local Geography Example

USGS/CONED project map example (Barnegat Bay area) used to illustrate how geographic data can be mapped for planning and hazard assessment
Related context: local development (e.g., hotel near a university campus) and community impact discussions
Question prompt: How could these geographic insights impact the Texas State University (TXST) community?

Geography Is about Earth’s Subsystems

Earth’s subsystems: Atmosphere, Biosphere, Lithosphere (rock/soil), Hydrosphere (water)
Geography emphasizes a dynamic, interconnected Earth system
Short-term processes: seasons, droughts, floods, volcanic eruptions
Long-term processes: erosion, climate change, sea-level changes, salinity shifts

Location, Location, Location

Relative Location: approximate position
Absolute Location: coordinates (precise)
Space and Place: how location defines identity and meaning
Spatial Distribution: how features are spread across space
Spatial Pattern: the arrangement of features in space
Spatial Interaction: interlinkages among phenomena and their mutual effects across space

Distribution, Pattern, Interaction – Case Examples

Missouri River flood: top crests observed in June 2024; multiple sites among the top five historical crests
Invasive species distribution: Solenopsis invicta (fire ant) spread across the United States with historical inflection points (1950, 1966, 1976, 1986) and projected future spread; map highlights infested vs incipient areas
Climate/temperature maps: boundary areas showing 10°F min temperature zones and other climatic delineations
Urban examples: distribution/patterns in city spaces (illustrated via a street map excerpt)

Attendance, Local Content (Contextual, Non-Core for Geography)

Attendance roster and campus-life items appear in a few pages (e.g., August 26, 2025) but are not central to geography concepts; noted here as context of course materials

Lab 1: Latitude, Longitude, and Spatial Coordinates

Learning objectives:
1) Use a geographic grid system to identify locations
2) Calculate Earth’s circumference at different locations
3) Identify Tropics of Cancer and Tropic of Capricorn; understand their relation to Earth’s position relative to the Sun
4) Understand relationships between latitude/longitude and Earth geography
Key terms:
- Latitude (parallels)
- Longitude (meridians)
- Equator
- International Date Line
- Tropic of Cancer, Tropic of Capricorn
- Circle of the Prime Meridian (Greenwich)
- GPS
- Plane of the Ecliptic
Section 1: Latitude & Longitude
- Latitudes are lines running parallel to the Equator; longitudes are lines running from pole to pole (meridians)
- The Equator is 0° latitude; Poles are ±90° latitude
- The Prime Meridian (0° longitude) runs through Greenwich, England
- Coordinates are expressed as intersections of latitude and longitude (degrees, minutes, seconds)
- One degree comprises 60 minutes, and one minute comprises 60 seconds: 1° = 60′ and 1′ = 60″, written as $1^ ext{o} = 60^ extprime$ and $60^{ extprime}=60^{ extprime extprime}$ (conceptual)
- Decimal degrees are widely used by GPS; common example in transcript shows coordinates like 43°38′N, 79°24′W
- Converting to decimal degrees: for DMS to decimal, use
  ext{decimal degrees} = D + rac{M}{60} + rac{S}{3600}
- Example coordinates from the transcript for practice: A) 43°38′ N, 79°24′ W; B) 30°03′ N, 31°14′ E
- The Earth’s curvature means lines of latitude/longitude form a gridded system on a roughly spherical Earth; distances depend on location and direction
Section 2: Tilt of the Earth
- Earth’s axial tilt affects how sunlight reaches different parts of Earth during the year, influencing seasons
- Practice prompts include:
- A) San Antonio, Texas? (example location for practice)
- B) Another coordinate example: 30°03′ N, 31°14′ E
- Key conceptual questions:
- Why does Earth have seasons? List two reasons (e.g., axial tilt and orbit around the Sun)
- What do Tropics of Cancer/Capricorn indicate?
- What do Arctic/Antarctic Circles indicate?
- What is the relationship between Earth’s inclination and the Tropics?
Section 3: Length of Daylight
- Daylight duration changes with latitude and time of year; discusses the relationship to solstices and equinoxes ( Autumnal and Vernal) and the seasonal shift in day length
- Latitude/longitude data for San Marcos, Texas used as a practical exercise in locating a place within the grid
- Practice prompts include calculations of day length and conversions between lat/long and decimal degrees
Section 4: Additional Lab Calculations (from transcript)
- Example: Earth’s circumference at the Arctic/Antarctic region for a given degree: 1° corresponds to approximately 27.66 miles at the Arctic/Antarctic and 63.47 miles at the Tropics of Cancer (as provided in the lab prompts)
- The concept used to estimate distances around the Earth along parallels

Regional, Environmental, and Ecosystem Contexts

Geography and Ecosystems (Page 25-26):
- Ecosystems defined as communities of organisms and their relationships with each other and the environment
- Habitable land is a limited resource; integrates biology with physical geography
Human Environment Interaction (Page 26):
- Hazards and disasters; environmental degradation; pollution and natural resources
- Environmental Overshoot: consumption rate exceeds renewability/supply
- Sustainability: maintaining resources for future use

Systems Theory in Geography

Systems of the Earth (Page 27):
- Inputs: energy and materials entering an Earth system
- Outputs: energy and materials leaving a system
- Open System: allows energy/materials to cross boundaries freely
- Closed System: minimal cross-boundary flow of energy/materials
Earth Systems (Page 28):
- Dynamic Equilibrium: ongoing, shifting balance among system variables
- Feedback mechanisms (Page 28-29):
- Negative feedback: dampens initial change, helping restore balance
- Positive feedback: reinforces initial change, can lead to imbalance
Visual: Types of feedback loops (Page 29):
- Positive Feedback loop: Input → System → Output, amplifying change
- Negative Feedback loop: Input → System → Output, dampening change

Negative Feedback: Ozone Depletion and CFCs (Montreal Protocol)

Example of a negative feedback mechanism reducing harmful change:
- Humans use CFCs → CFCs accumulate in the atmosphere → ozone depletion increases ultraviolet (UV) radiation reaching Earth's surface → higher UV exposure harms health and ecosystems
- Montreal Protocol implemented in 1989 to reduce CFC emissions
- Over time, reduced CFCs reduce ozone depletion, increasing ozone layer’s protective screening against UV radiation
- The timeline in the transcript references ongoing progress through 2003–2010 and beyond, illustrating the delayed but stabilizing effect of regulation

Geography in the Urban and Local Context

Accessibility and Mobility (Page 32):
- Concept of geographic accessibility in urban spaces (e.g., proximity to Bobcat Ballpark, hotels, and services)
- Examples include the notion of a “Food Desert” within a city context
Spatial Layout: Use of maps and place names to understand urban patterns (e.g., streets and neighborhoods in the provided urban map excerpt)

Representations of Earth (Ch. 2 Context in Page 33)

Core representations include:
- Latitude, Longitude, Equator, Prime Meridian
- International Date Line
- Great Circle Routes (shortest path between two points on a sphere)
- Equinoxes and Solstices (seasonal markers)
- Insolation (incoming solar radiation) concepts relevant to climate and geography

Synthesis and Closing Themes

Thematic recap: Geography integrates physical processes with human societies, using spatial thinking to understand distributions, patterns, and interactions across Earth space
Final punchline from the page: GEOLOGY ROCKS BUT GEOGRAPHY IS WHERE IT'S AT

Key Equations and Numerical References (as cited in the transcript)

Distance per degree along parallels (example values from lab prompts):
- Arctic/Antarctic region: approximately $1^ ext{o} <br /> ightarrow 27.66 ext{ miles}$
- Tropics of Cancer: approximately $1^ ext{o} <br /> ightarrow 63.47 ext{ miles}$
Latitude/Longitude conversion basics (from Section 1 Lab):
- 1^ ext{o} = 60^ extprime $</li> <li>1^ extprime = 60^{ extprime extprime} ext{ (conceptual)}</li> <li>Decimal degrees conversion:$ ext{decimal degrees} = D + rac{M}{60} + rac{S}{3600} $</li></ul></li> <li>General geographic circumference formula (conceptual):<ul> <li>$ C = 2\, ext{pi} \,R $</li> <li>For the equator specifically:$ C{eq} = 2\, ext{pi} \,R{eq}$$

Connections to Broader Learning and Real-World Relevance

Interdisciplinarity: geography connects science (geology, meteorology, ecology) with social sciences (sociology, economics, political science)
Technology in geography: GIS, remote sensing, drones, LiDAR, and cartography drive modern spatial analysis
Environmental concern: sustainability and resource management are central to both academic study and policy making
Urban planning and hazard mitigation: understanding spatial patterns and regions informs planning and resilience efforts

Quick Practice Prompts (from Lab Content)

Section 1 practice: Identify coordinates for a given location using latitude/longitude; convert between decimal degrees and DMS; example coordinates provided include 43°38′ N, 79°24′ W and 30°03′ N, 31°14′ E
Section 2 practice: Explain the season-causing reasons; interpret Tropics/Arctic lines; relate Earth’s tilt to insolation patterns
Section 3 practice: Determine daylight length changes and relate to latitude and time of year
Conceptual calculations: Use the given degree-to-mile examples to estimate distances around Earth along parallels

Endnote

The material covers a wide range from conceptual foundations to applied geography, including career paths, regional planning, Earth systems theory, and practical lab skills in latitude/longitude and regional geography.