Question 1

What is the difference between weather and climate?

Accepted Answer

Weather describes atmospheric conditions like temperature in a region over a short period, such as a day. Climate records the same conditions for the same region but over an extended period, such as average annual temperature. Global climate refers to these variables analyzed and compiled across the entire planet.

Question 2

How do greenhouse gases cause global warming?

Accepted Answer

Greenhouse gases like carbon dioxide, water vapor, ozone, and methane form a layer around Earth similar to a glass shield. This layer allows the Sun's rays to penetrate but traps reflected rays, preventing them from escaping into space. This trapping of heat at Earth's surface due to the atmosphere is called the greenhouse effect, leading to rising temperatures.

Question 3

What is the albedo effect and how does it accelerate ice melting?

Accepted Answer

Albedo is the ratio of reflected to total solar radiation, ranging from 0 to 1. Fresh white snow has high albedo around 0.8, while bare soil has only 0.2 and open ocean 0.1. As climate warms and snow melts, albedo decreases, meaning Earth reflects less radiation and absorbs more heat, creating a positive feedback loop that causes more melting.

Question 4

How does sea level rise threaten coastal communities?

Accepted Answer

Melting glacial ice from warming temperatures causes sea levels to rise. Large ice sheets contain mass equivalent to nearly 70 meters of global sea-level rise. If ocean levels rise just 1 meter, significant portions of coastlines like Florida would be underwater, affecting millions of people's homes and destroying coastal properties.

Question 5

What are species range shifts and why do they matter?

Accepted Answer

Species are found across a geographical area called their range. As climate warms, environmental changes like melting ice caps can shift or decline a species' habitable range. Scientists study these range shifts to predict whether species can adapt to changing temperature and precipitation patterns, or face extinction if they cannot move to suitable areas.

Question 6

How does ocean acidification affect marine organisms?

Accepted Answer

Oceans absorb about a quarter of atmospheric carbon dioxide annually. When CO2 is absorbed by seawater, it converts to carbonic acid, making seawater more acidic and reducing carbonate ion availability. This hinders calcium carbonate structures in bivalves, sea urchins, and corals, combined with rising ocean temperatures, making aquatic ecosystems increasingly vulnerable.

Question 7

Why is studying species extinction rates important for understanding climate change?

Accepted Answer

The extinction rate in the past century has been 1000 times greater than background rates, a phenomenon called the Holocene Extinction or Sixth Extinction. Habitat loss and climate change both drive species extinction. Understanding extinction patterns helps scientists recognize the urgent need to maintain environmental considerations in management decisions to mitigate climate impacts.

Zmiany klimatyczne

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