ImpactMojo ImpactMojo
Premium

Climate Change 101

Climate Science Fundamentals & IPCC Framework for South Asia
ImpactMojo Workshop Series • Understanding Climate Science & Global Response
75-90 Minutes

Workshop 1: Climate Science Foundations & IPCC Assessment

Target Audience: Development practitioners, environmental activists, policy makers, researchers, and community organizers working on climate and sustainability issues

Prerequisites: Basic understanding of environmental issues helpful but not required

Materials Needed: Laptops/tablets for accessing climate data, calculators, notebooks, colored pens for graphing

Learning Objectives

By the end of this workshop, participants will be able to:

Part 1: The Scientific Foundation - Understanding Climate vs Weather

15 minutes

The Global Climate Reality (2024 Data)

Global Temperature: Earth has warmed 1.15°C above pre-industrial (1850-1900) baseline

South Asian Impact: India has warmed 0.8°C since 1900, with accelerating pace post-1980

Critical Threshold: 1.5°C warming could trigger irreversible changes to climate systems

Time Window: 6 years left to limit warming to 1.5°C (based on current emission trajectories)

Climate vs Weather: Getting the Basics Right

Essential Distinction

Weather: Short-term atmospheric conditions (hours to weeks) in a specific location

  • Example: "Mumbai received 200mm rainfall yesterday"
  • Highly variable and difficult to predict beyond 2 weeks

Climate: Long-term average weather patterns (30+ years) across regions

  • Example: "Mumbai's monsoon season typically brings 2,000mm annual rainfall"
  • Predictable patterns that enable agriculture and urban planning

Climate Change: Long-term shifts in climate patterns due to human activities

  • Changes in temperature, precipitation, extreme events over decades
  • Driven primarily by greenhouse gas emissions since 1750

Quick Check: Climate vs Weather (5 minutes)

Classify these statements as Weather (W) or Climate (C):

  1. Delhi recorded its hottest day ever at 48.4°C in May 2024 ___
  2. The Gangetic plains typically experience 600-800mm annual rainfall ___
  3. Cyclone Biparjoy hit Gujarat coast in June 2023 ___
  4. Western Ghats receive 2,500mm+ rainfall during southwest monsoon ___
  5. Himachal Pradesh expects snowfall this winter ___
  6. Himalayan glaciers have retreated 22% since 1962 ___

Answers: W, C, W, C, W, C

Part 2: The Greenhouse Effect - Natural vs Enhanced

20 minutes

Understanding Earth's Energy Balance

The Natural Greenhouse Effect

Essential for Life: Without greenhouse gases, Earth's average temperature would be -18°C (currently +15°C)

How It Works:

  1. Solar Energy In: Sun sends shortwave radiation to Earth
  2. Surface Absorption: Earth's surface absorbs energy and warms up
  3. Longwave Radiation Out: Warm surface emits longwave (infrared) radiation
  4. Greenhouse Trapping: Greenhouse gases absorb and re-emit some radiation back to surface
  5. Natural Balance: Keeps Earth warm enough for liquid water and life

The Enhanced Greenhouse Effect: Human activities add extra greenhouse gases, trapping more heat and disrupting Earth's energy balance. This is what drives climate change.

Major Greenhouse Gases & Their Sources

Gas % of Total Emissions Warming Potential (vs CO₂) Main Sources Indian Context
Carbon Dioxide (CO₂) 76% 1 (baseline) Fossil fuels, deforestation, cement Coal power (44% of total), steel/cement industries
Methane (CH₄) 16% 25x Agriculture, landfills, oil/gas Rice cultivation, livestock (25% of global rice emissions)
Nitrous Oxide (N₂O) 6% 298x Fertilizers, fossil fuels Agricultural fertilizers, crop burning
Fluorinated Gases 2% 1,000-23,000x Refrigeration, industrial Growing AC market, industrial cooling

India's Emissions Profile (2022)

  • Total Emissions: 3.4 billion tonnes CO₂ equivalent (9.6% of global total)
  • Per Capita: 2.4 tonnes CO₂/person (global average: 4.8 tonnes)
  • Historical Responsibility: 4.1% of cumulative emissions since 1850
  • Growth Rate: 6.3% increase from 2021 (economic recovery post-COVID)

Part 3: The IPCC Framework - Assessing Climate Science

20 minutes

What is the IPCC?

Intergovernmental Panel on Climate Change

Established: 1988 by UNEP and WMO

Purpose: Assess scientific literature on climate change for policymakers

Structure: 3 Working Groups + Task Force on National Greenhouse Gas Inventories

  • Working Group I: Physical science basis of climate change
  • Working Group II: Impacts, adaptation, and vulnerability
  • Working Group III: Mitigation of climate change

Process: Thousands of scientists review and synthesize research every 6-8 years

Indian Participation: 50+ Indian scientists contributed to AR6 (2021-2023)

Understanding IPCC Language & Confidence Levels

IPCC Confidence Framework: The IPCC uses specific language to communicate certainty levels based on evidence quality and scientific agreement.

Confidence Levels
  • Very High: At least 9 out of 10 chance of being correct
  • High: About 8 out of 10 chance
  • Medium: About 5 out of 10 chance
  • Low: About 2 out of 10 chance
Likelihood Terms
  • Virtually Certain: 99-100% probability
  • Very Likely: 90-100% probability
  • Likely: 66-100% probability
  • Unlikely: 0-33% probability

IPCC Statement Analysis (8 minutes)

Analyze these actual IPCC AR6 statements and discuss their policy implications:

Statement 1: "It is unequivocal that human influence has warmed the planet." (WG1)

Statement 2: "Climate change is already affecting food security and is likely to worsen it." (WG2)

Statement 3: "Limiting warming to 1.5°C is still possible but requires immediate and far-reaching transitions." (WG3)

Discussion Questions:

  1. What does "unequivocal" mean in scientific terms?
  2. How should policymakers respond to "likely" predictions?
  3. What does "immediate and far-reaching" imply for development strategies?

Part 4: Climate Scenarios & Future Projections

15 minutes

Understanding Representative Concentration Pathways (RCPs)

Climate Scenarios for South Asia

RCP2.6 (Strong Climate Action):

  • Global warming limited to 1.5-2°C by 2100
  • South Asia: 1.5-2.5°C warming, minimal monsoon change
  • Requires immediate, massive emissions cuts

RCP4.5 (Moderate Climate Action):

  • Global warming of 2.5-3°C by 2100
  • South Asia: 2-3.5°C warming, 10-15% monsoon increase
  • Current national pledges lead roughly here

RCP8.5 (High Emissions/Business as Usual):

  • Global warming of 4-5°C by 2100
  • South Asia: 4-6°C warming, 20-30% monsoon increase
  • Continued fossil fuel dependence

🇮🇳 India-Specific Projections (IPCC AR6)

Temperature Changes by 2050:

  • All scenarios: 1.5-2.5°C warming above 1995-2014 baseline
  • Heat waves will be longer, more intense, and more frequent
  • Himalayan regions warming faster than global average

Precipitation Changes:

  • Annual rainfall: +5% to +15% increase
  • Monsoon intensity: More extreme rainfall events
  • Regional variation: Northeast gets wetter, northwest drier

Extreme Events:

  • Heat waves: 3-5x more frequent by mid-century
  • Flooding: Increased urban and coastal flood risk
  • Cyclones: More intense storms in Arabian Sea
  • Droughts: More frequent in central/western regions

Hands-On Exercise: Climate Data Interpretation

10 minutes

Analyzing Climate Trends for Your Region

Activity: Choose a state/region and analyze its climate trends using available data

Data Sources to Explore:

  • India Meteorological Department: Climate data and trends
  • World Bank Climate Portal: Country/regional climate profiles
  • Climate Change Knowledge Portal: Scenario-based projections

Analysis Framework (5 minutes):

  1. Historical Trends: How has temperature/rainfall changed since 1980?
  2. Extreme Events: What climate extremes has your region experienced?
  3. Future Projections: What changes are expected by 2050?
  4. Development Implications: How might these changes affect agriculture, water, health?

Sharing (5 minutes): Present your key findings to the group

Key Takeaway

Climate science provides robust evidence for human-caused climate change. Understanding IPCC frameworks and regional projections is essential for evidence-based adaptation and mitigation planning in South Asian contexts.

Resources for Continued Learning

IPCC Reports & Summaries:

Indian Climate Science & Data:

Global Climate Data & Tools:

Next Steps in ImpactMojo: