Just Released! Order “Waking Up to Climate Change” by George Ropes, and receive 25% Discount. Learn More

Search
Close this search box.
Search
Close this search box.

HOME          CATEGORIES          OUR TAKE

How Much Do Volcanoes Influence the Climate? by City Tech Blogger Maria De Leon

A volcano is a conical hill or mountain formed by material from the mantle being forced through an opening or vent in the Earth’s crust. Volcanic eruptions can affect climate in two ways, they release the greenhouse gas carbon dioxide, contributing to the warming of the atmosphere, and sulfur dioxide contained in the ash cloud can produce a cooling effect. Also, the volcanic ash cloud created by a volcanic blast can change interactions between the atmosphere and sun, affecting climate patterns. “When volcanoes erupt, they emit a mixture of gases and particles into the air. Some of them, such as ash and sulfur dioxide, have a cooling effect because they (or the substances they cause) reflect sunlight away from the earth. Others, such as CO2, cause warming by adding to the greenhouse effect.”

How does it work?

Ash generally remains suspended in the air for a period of time, increasing earth’s albedo. The ash prevents full sunlight from entering the earth, causing the temperature to cool immediately after the eruption. However, once ash disperses over the larger area, newly emitted greenhouse gases result in a marginal increase in average temperature. Since carbon dioxide is a major greenhouse gas, it traps heat radiated off of the surface of the Earth forming a type of insulation around the planet. In fact, according to UCAR (University Corporation for Atmospheric Research) Center For Science Education, the cooling effect can last for months to years depending on the characteristics of the eruption. Volcanoes have also caused global warming over millions of years during times in Earth’s history when extreme amounts of volcanism occurred, releasing greenhouse gases into the atmosphere. When Mount Pinatubo erupted in the Philippines June 15, 1991, an estimated 20 million tons of sulfur dioxide and ash particles blasted more than 12 miles and 20 Km high into the atmosphere. The eruption caused widespread destruction and loss of human life. This was one of the most powerful eruptions, There have been no significant eruptions since Mt. Pinatubo in 1991.

 

Comment on this article

ClimateYou moderates comments to facilitate an informed, substantive, civil conversation. Abusive, profane, self-promotional, misleading, incoherent or off-topic comments will be rejected. Moderators are staffed during regular business hours (New York time) and can only accept comments written in English.

One Response

  1. Maria, I really appreciated your simple description of a complex topic. Since my sister got stranded in Iceland for a few days due to volcano ash, I have always wondered how volcanoes contribute to the warming or cooling of the earth. After reading your post I am now very interested in the reverse effect of volcanoes and climate. I understand that in Iceland there is a potential for melted glaciers to impact volcanic eruptions so could climate change cause more eruptions of volcanoes? Is this all just a big cycle?

Leave a Reply

Your email address will not be published. Required fields are marked *


The reCAPTCHA verification period has expired. Please reload the page.

SHARE THIS ARTICLE


More Posts Like This

CITY TECH BLOG

Adapting to Heat Waves & Climate Change

Heat waves – once sporadic events – are becoming more frequent, intense, and prolonged due to climate change. These periods of excessively hot weather bring about a myriad of impacts on both the environment and human society. One of the most direct impacts of heat waves is on

CITY TECH BLOG

How Climate Change is Changing My Home City

As a person living in a coastal city, more specifically New York City, my area of living is a prime target for climate change occurrences. From rising sea levels and temperatures to structures being damaged or completely destroyed, a lot will change and has changed in my home,

CITY TECH BLOG

Climate Change and the Industries of the World

It’s no surprise that when the climate of an area changes, it impacts most, if not all of their industries and way of life of countries. Some of these industries include tourism, agriculture, fishery, and infrastructure, which all dictate the economy and life quality of the residents in