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A short class with Sarah and her students. The other ways are under More.
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Today, we’re going to discuss rising global average temperatures, which is one of the primary indicators of climate change. Can anyone tell me why we should care about changes in temperature?
Because it affects our weather and ecosystems, right?
Exactly! Rising temperatures can lead to more extreme weather. One way to remember this is the acronym 'WARM' – Weather, Agriculture, Resources, and Marine life. These are all impacted by higher global temperatures.
What are the actual numbers we are seeing in temperature rise?
Great question! Over the last century, we’ve seen an increase of about 1°C (1.8°F) since the late 1800s. Let’s dive deeper into how this affects each of those areas.
Now, let’s talk about glaciers and polar ice. Who can tell me what happens when glaciers melt?
It raises sea levels, right?
Yes! When polar ice and glaciers melt, the water flows into the ocean, increasing sea levels. Remember the phrase 'Melted Ice, Rising Price' – the price being the risk of coastal flooding.
Is there a specific location where this is happening faster?
Absolutely! Greenland and Antarctica are experiencing significant ice loss. Let’s look at some graphs to visualize this.
Rising sea levels are becoming a reality for many coastal cities. What can you think will happen if our sea levels rise significantly?
Coastal flooding and loss of habitat for people and wildlife!
Exactly! Flooding can lead to displacement of communities, which can be remembered as 'Fleeing Waters, Lost Daughters' – families disrupted by climate impacts.
How much are sea levels actually rising?
Sea levels have risen about 20-25 cm (8-10 inches) over the last century and are expected to rise more in the coming decades – a pressing issue for future generations. Let’s brainstorm adaptation strategies.
Extreme weather events are becoming more common. Can anyone name a recent event?
The hurricanes and wildfires last summer were terrible.
Exactly! The increase in severity and frequency of these events can be summed up with the mnemonic 'F.I.N.E' – Frequency, Intensity, Nature, and Effects. Each letter highlights aspects of extreme weather related to climate change.
Are certain areas more affected than others?
Yes! Coastal areas are particularly vulnerable. Understanding local impacts can help in planning and preparedness. Let’s work on mapping affected zones.
A significant increase in Earth's average temperature linked to human activities.
The reduced mass of glaciers due to persistent warming and its implications for sea levels.
The long-term increase in ocean levels due to thermal expansion and ice melt.
Increasing frequency and severity of weather phenomena attributed to climate change.
Shifts in rainfall distribution affecting ecosystems and agriculture.
The decline in species diversity as a result of changing habitats and climates.
The average global temperature has increased by approximately 1°C since the late 19th century, impacting ecosystems and weather.
Glaciers in Greenland and Antarctica have been melting at unprecedented rates, contributing to a global sea level rise of about 20–25 cm.
Hurricanes in the Atlantic have become stronger and more frequent in recent years, resulting in significant damage and loss of life.
Temperature's higher, ice is thawing, warnings all around, for our future's calling.
Imagine a polar bear watching his ice home melting away, realizing he must find new ground, just like we need to take action.
Remember 'R.I.S.E' for Rising Ice, Sea levels, and Effects.
MELT for Melting, Ecosystem, Loss, Tomorrow.
Term
Rising Global Temperatures
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Term
Melting Glaciers
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The average temperature of Earth's atmosphere and oceans over a given year.
The process by which glaciers lose mass, primarily due to higher temperatures.
The increase in the level of the world's oceans due to thermal expansion and melting glaciers.
Severe or unusual weather phenomena, including hurricanes, droughts, and floods.
The way precipitation (rain, snow, sleet) is distributed over time and space across the globe.
The reduction in the variety of life forms, including species and ecosystems.
This section explores the scientific evidence of climate change, detailing the observable effects and their implications.
The section outlines key scientific indicators of climate change, including rising temperatures, melting ice, and extreme weather events, highlighting their significance in understanding the global impact of climate change.
Climate change is evidenced by a multitude of scientific observations that indicate significant changes in the Earth’s climate system. Major indicators include:
These indicators are critical for understanding the urgency of the climate crisis and forming strategies to combat its effects.