essay on global warming 2000 words

Essay on Global Warming – Causes and Solutions

500+ words essay on global warming.

Global Warming is a term almost everyone is familiar with. But, its meaning is still not clear to most of us. So, Global warming refers to the gradual rise in the overall temperature of the atmosphere of the Earth. There are various activities taking place which have been increasing the temperature gradually. Global warming is melting our ice glaciers rapidly. This is extremely harmful to the earth as well as humans. It is quite challenging to control global warming; however, it is not unmanageable. The first step in solving any problem is identifying the cause of the problem. Therefore, we need to first understand the causes of global warming that will help us proceed further in solving it. In this essay on Global Warming, we will see the causes and solutions of Global Warming.

Causes of Global Warming

Global warming has become a grave problem which needs undivided attention. It is not happening because of a single cause but several causes. These causes are both natural as well as manmade. The natural causes include the release of greenhouses gases which are not able to escape from earth, causing the temperature to increase.

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Further, volcanic eruptions are also responsible for global warming. That is to say, these eruptions release tons of carbon dioxide which contributes to global warming. Similarly, methane is also one big issue responsible for global warming.

So, when one of the biggest sources of absorption of carbon dioxide will only disappear, there will be nothing left to regulate the gas. Thus, it will result in global warming. Steps must be taken immediately to stop global warming and make the earth better again.

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Global Warming Solutions

As stated earlier, it might be challenging but it is not entirely impossible. Global warming can be stopped when combined efforts are put in. For that, individuals and governments, both have to take steps towards achieving it. We must begin with the reduction of greenhouse gas.

Furthermore, they need to monitor the consumption of gasoline. Switch to a hybrid car and reduce the release of carbon dioxide. Moreover, citizens can choose public transport or carpool together. Subsequently, recycling must also be encouraged.

Read Global Warming Speech here

For instance, when you go shopping, carry your own cloth bag. Another step you can take is to limit the use of electricity which will prevent the release of carbon dioxide. On the government’s part, they must regulate industrial waste and ban them from emitting harmful gases in the air. Deforestation must be stopped immediately and planting of trees must be encouraged.

In short, all of us must realize the fact that our earth is not well. It needs to treatment and we can help it heal. The present generation must take up the responsibility of stopping global warming in order to prevent the suffering of future generations. Therefore, every little step, no matter how small carries a lot of weight and is quite significant in stopping global warming.

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FAQs on Global Warming

Q.1 List the causes of Global Warming.

A.1 There are various causes of global warming both natural and manmade. The natural one includes a greenhouse gas, volcanic eruption, methane gas and more. Next up, manmade causes are deforestation, mining, cattle rearing, fossil fuel burning and more.

Q.2 How can one stop Global Warming?

A.2 Global warming can be stopped by a joint effort by the individuals and the government. Deforestation must be banned and trees should be planted more. The use of automobiles must be limited and recycling must be encouraged.

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Essay on Climate Change: Check Samples in 100, 250 Words

• Updated on  
• Sep 21, 2023

Writing an essay on climate change is crucial to raise awareness and advocate for action. The world is facing environmental challenges, so in a situation like this such essay topics can serve as s platform to discuss the causes, effects, and solutions to this pressing issue. They offer an opportunity to engage readers in understanding the urgency of mitigating climate change for the sake of our planet’s future.

Must Read: Essay On Environment  

Table of Contents

• 1 What Is Climate Change?
• 2 What are the Causes of Climate Change?
• 3 What are the effects of Climate Change?
• 4 How to fight climate change?
• 5 Essay On Climate Change in 100 Words
• 6 Climate Change Sample Essay 250 Words

What Is Climate Change?

Climate change is the significant variation of average weather conditions becoming, for example, warmer, wetter, or drier—over several decades or longer. It may be natural or anthropogenic. However, in recent times, it’s been in the top headlines due to escalations caused by human interference.

What are the Causes of Climate Change?

Obama at the First Session of COP21 rightly quoted “We are the first generation to feel the impact of climate change, and the last generation that can do something about it.”.Identifying the causes of climate change is the first step to take in our fight against climate change. Below stated are some of the causes of climate change:

• Greenhouse Gas Emissions: Mainly from burning fossil fuels (coal, oil, and natural gas) for energy and transportation.
• Deforestation: The cutting down of trees reduces the planet’s capacity to absorb carbon dioxide.
• Industrial Processes: Certain manufacturing activities release potent greenhouse gases.
• Agriculture: Livestock and rice cultivation emit methane, a potent greenhouse gas.

What are the effects of Climate Change?

Climate change poses a huge risk to almost all life forms on Earth. The effects of climate change are listed below:

• Global Warming: Increased temperatures due to trapped heat from greenhouse gases.
• Melting Ice and Rising Sea Levels: Ice caps and glaciers melt, causing oceans to rise.
• Extreme Weather Events: More frequent and severe hurricanes, droughts, and wildfires.
• Ocean Acidification: Oceans absorb excess CO2, leading to more acidic waters harming marine life.
• Disrupted Ecosystems: Shifting climate patterns disrupt habitats and threaten biodiversity.
• Food and Water Scarcity: Altered weather affects crop yields and strains water resources.
• Human Health Risks: Heat-related illnesses and the spread of diseases.
• Economic Impact: Damage to infrastructure and increased disaster-related costs.
• Migration and Conflict: Climate-induced displacement and resource competition.

How to fight climate change?

‘Climate change is a terrible problem, and it absolutely needs to be solved. It deserves to be a huge priority,’ says Bill Gates. The below points highlight key actions to combat climate change effectively.

• Energy Efficiency: Improve energy efficiency in all sectors.
• Protect Forests: Stop deforestation and promote reforestation.
• Sustainable Agriculture: Adopt eco-friendly farming practices.
• Advocacy: Raise awareness and advocate for climate-friendly policies.
• Innovation: Invest in green technologies and research.
• Government Policies: Enforce climate-friendly regulations and targets.
• Corporate Responsibility: Encourage sustainable business practices.
• Individual Action: Reduce personal carbon footprint and inspire others.

Essay On Climate Change in 100 Words

Climate change refers to long-term alterations in Earth’s climate patterns, primarily driven by human activities, such as burning fossil fuels and deforestation, which release greenhouse gases into the atmosphere. These gases trap heat, leading to global warming. The consequences of climate change are widespread and devastating. Rising temperatures cause polar ice caps to melt, contributing to sea level rise and threatening coastal communities. Extreme weather events, like hurricanes and wildfires, become more frequent and severe, endangering lives and livelihoods. Additionally, shifts in weather patterns can disrupt agriculture, leading to food shortages. To combat climate change, global cooperation, renewable energy adoption, and sustainable practices are crucial for a more sustainable future.

Must Read: Essay On Global Warming

Climate Change Sample Essay 250 Words

Climate change represents a pressing global challenge that demands immediate attention and concerted efforts. Human activities, primarily the burning of fossil fuels and deforestation, have significantly increased the concentration of greenhouse gases in the atmosphere. This results in a greenhouse effect, trapping heat and leading to a rise in global temperatures, commonly referred to as global warming.

The consequences of climate change are far-reaching and profound. Rising sea levels threaten coastal communities, displacing millions and endangering vital infrastructure. Extreme weather events, such as hurricanes, droughts, and wildfires, have become more frequent and severe, causing devastating economic and human losses. Disrupted ecosystems affect biodiversity and the availability of vital resources, from clean water to agricultural yields.

Moreover, climate change has serious implications for food and water security. Changing weather patterns disrupt traditional farming practices and strain freshwater resources, potentially leading to conflicts over access to essential commodities.

Addressing climate change necessitates a multifaceted approach. First, countries must reduce their greenhouse gas emissions through the transition to renewable energy sources, increased energy efficiency, and reforestation efforts. International cooperation is crucial to set emission reduction targets and hold nations accountable for meeting them.

In conclusion, climate change is a global crisis with profound and immediate consequences. Urgent action is needed to mitigate its impacts and secure a sustainable future for our planet. By reducing emissions and implementing adaptation strategies, we can protect vulnerable communities, preserve ecosystems, and ensure a livable planet for future generations. The time to act is now.

Climate change refers to long-term shifts in Earth’s climate patterns, primarily driven by human activities like burning fossil fuels and deforestation.

Five key causes of climate change include excessive greenhouse gas emissions from human activities, notably burning fossil fuels and deforestation. 

We hope this blog gave you an idea about how to write and present an essay on climate change that puts forth your opinions. The skill of writing an essay comes in handy when appearing for standardized language tests. Thinking of taking one soon? Leverage Edu provides the best online test prep for the same via Leverage Live . Register today to know more!

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Home / For Educators: Grades 6-12 / Climate Explained: Introductory Essays About Climate Change Topics

Climate Explained: Introductory Essays About Climate Change Topics

Filed under: backgrounders for educators ,.

Climate Explained, a part of Yale Climate Connections, is an essay collection that addresses an array of climate change questions and topics, including why it’s cold outside if global warming is real, how we know that humans are responsible for global warming, and the relationship between climate change and national security.

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Climate Change Basics: Five Facts, Ten Words

Backgrounders for Educators

To simplify the scientific complexity of climate change, we focus on communicating five key facts about climate change that everyone should know. 

Why should we care about climate change?

Having different perspectives about global warming is natural, but the most important thing that anyone should know about climate change is why it matters.  

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Looking for resources to help you and your students build a solid climate change science foundation? We’ve compiled a list of reputable, student-friendly links to help you do just that!  

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• Essay on Effects of Global Warming

Introduction

Our world, as well as all living things such as animals, birds, insects, trees, and plants, were created by nature. They all have the right to live their lives as they see fit, but the human being is the most perplexing of all living creatures. For our own needs and greed, we humans are killing nature, and we will pay the price in the form of catastrophe. Here we have provided both long and short essays on the effects of Global Warming for students of Classes 1 to 12.

Long Effect of Global Warming Essay in English

As carbon dioxide (CO 2 ) and other air pollution and greenhouse gases build up in the atmosphere, they absorb sunlight and solar radiation that has bounced off the earth's surface, resulting in global warming. Normally, this radiation will disperse into space, but these contaminants, which can remain in the atmosphere for years or decades, trap the heat and cause the earth to get hotter. The greenhouse effect is the result of this.

So, What causes Global Warming?

Natural Causes of Global Warming:

For decades, the world has been shifting. The natural rotation of the sun causes global warming by changing the strength of sunlight and bringing it closer to the earth.

Greenhouse emissions are another contributor to global warming. 

Carbon monoxide and sulphur dioxide are greenhouse gases that absorb solar heat rays and prevent them from escaping the earth's surface. The earth's temperature has increased as a result of this.

Another factor that contributes to global warming is volcanic eruptions. A single volcanic eruption, for example, can release a significant amount of carbon dioxide and ash into the atmosphere.

As carbon dioxide levels rise, the earth's temperature rises, and greenhouse gases absorb solar radiation.

Finally, methane is a contributor to global warming. Methane is a greenhouse gas as well. Methane is 20 times more effective than carbon dioxide at trapping heat in the atmosphere. Methane gas can usually be used in a variety of places. Cattle, landfills, natural gas, petroleum systems, coal mining, mobile explosions, and industrial waste processes are only a few examples.

Human Influences on Global Warming:

Humans are more responsible for global warming than natural causes. Because of modern human lifestyles, the earth has been evolving for many years and continues to do so. Industrial production, fossil fuel combustion, mining, cattle rearing, and deforestation are all examples of human activities.

The industrial revolution is the first thing. Industrial devices have been powered by fossil fuels. All we use is made up of fossil fuels. When we purchase a cell phone, for example, the process of manufacturing the phone involves machines, which use fossil fuels, and carbon dioxide is released into the environment during the process. Aside from industry, transportation, such as automobiles, emits carbon dioxide by the exhaust.

Mining is another problem. Methane would be trapped under the earth during the mining process. Furthermore, raising cattle results in the release of methane in the form of manure. Cattle, on the other hand, are noteworthy because they are equally responsible for the occurrence of global warming.

Then there's deforestation, which is by far the most common problem. Humans have been cutting down trees to manufacture documents, wood, build homes, and other things, so deforestation is a human factor.

Humans also emit carbon dioxide as they breathe. As a result, carbon dioxide has been released into the atmosphere by millions of people. If human deforestation continues, the carbon dioxide released by human breathing will remain in the atmosphere.

Effects of Global Warming

Every year, scientists learn more about the effects of global warming, and all agree that if current patterns continue, environmental, economic, and health impacts are likely. Here's a taste of what we can expect in the coming months:

Melting glaciers, early snowmelt, and extreme droughts would intensify water shortages in the American West, raising the risk of wildfires.

Coastal flooding will occur along the Eastern Seaboard, especially in Florida, as well as in other areas such as the Gulf of Mexico.

New pests will wreak havoc on forests, crops, and towns, as will heat waves, heavy rains, and increased flooding.

Many plant and animal species could become extinct if ecosystems such as coral reefs and Alpine meadows are disrupted.

Increased pollen-producing ragweed growth, higher levels of air pollution, and the spread of conditions favorable to pathogens and mosquitoes will make allergies, asthma, and infectious disease outbreaks more likely.

In the above effect of global warming essay in English, we have discussed in depth all the natural causes of global warming and how humans have contributed towards its drastic increase. Below we have provided short effects of the Global Warming essay for students of Classes 1 to 5.

Effect of Global Warming Short Essay

Since hundreds of years ago, greenhouse gases have remained in the atmosphere for several years. Global warming, on the other hand, would have disastrous consequences for the planet. If global warming persists, a slew of negative consequences will emerge. Melting polar ice caps, economic effects, warming oceans, and more storms, disease transmission, and earthquakes are all examples.

The melting of the polar ice caps is the first consequence. The ice at the North Pole will melt as the temperature increases. Since melting glaciers become seas, the first result of ice melting would be an increase in sea levels. “If the ice melted today, the seas will rise about 230 feet,” according to the National Snow and Ice Data Center. Many low-lying areas, such as the Netherlands, are affected. Once the North Pole melts, the Netherlands will be submerged in water. However, that will not happen easily, and the sea level will continue to rise.

Another impact is the loss of habitat for some species. Polar bears and tropical frogs would become extinct as a result of climate change. Furthermore, since animals are not like humans, different birds will migrate to other locations. They are unable to adjust to changes in their climate, such as temperature or living conditions.

The next result is that more hurricanes will occur, with economic implications. Houses are damaged by hurricanes, and the government will have to spend billions of dollars to repair the damage, and people will need places to stay or will be killed. When a disaster strikes, many people die and illnesses spread. Diseases are more serious because they can spread rapidly to other people, allowing more people to catch the disease. Diseases can also become more serious as the weather changes.

Importance of an Essay on Global Warming

The essay on global warming is important because it will help students to understand the effects of global warming and how it impacts life on earth. They will then be aware and likewise, share their knowledge with their fellow beings and make them conscious of the human actions that lead to an increase in global warming.

Climate change is an issue that humans are actually facing, and the ones causing these problems are humans. Although it is difficult to avoid global warming, people can indeed help to mitigate and slow its effects. If no action is taken to address this problem, people will perish as a result of cli mate change and natural disasters. Humans changed the world; now it's time for humans to change themselves.

FAQs on Essay on Effects of Global Warming

1. State Some Ways to Reduce Global Warming ?

We should reduce the emission of greenhouse gases into the atmosphere to reduce global warming. 

We can minimise global warming by reducing our use of oil, electricity, and other practices that contribute to global warming. To save fuel, we should opt for a hybrid vehicle that uses less gasoline. 

Taking public transportation or carpooling to work has the potential to minimise carbon dioxide emissions while still saving money. 

Recycling is another way to help combat global warming. Reusing plastic bags, bottles, documents, or glass may help to minimise waste. 

Finally, open burning should be forbidden, such as the burning of dry leaves or garbage. When garbage is burned with plastic, carbon dioxide and toxic gases are released. Furthermore, since global temperatures are rising, the government should minimise deforestation. Trees will assist in the reduction of global warming.

2. Define Global Warming ?

Global warming is the long-term warming of Earth's climate system that has been observed since the pre-industrial era (between 1850 and 1900) as a result of human activities, mainly fossil fuel combustion, which raises heat-trapping greenhouse gas levels in the atmosphere. The words are sometimes used interchangeably, though the latter applies to both human- and naturally-caused warming, as well as the implications for our world. The average rise in Earth's global surface temperature is the most common metric.

3. How to download the Essay on Effects of Global Warming from the Vedantu Website?

The Vedantu website provides a download of the Essay on Effects of Global Warming, which is accurate and well-structured. Vedantu's official website provides the Essay in PDF version which is available for download for free of cost. Students are advised to download the Essay on Global Warming from the Vedantu website to get an idea of the word limit, sentence construction, and basic understanding of what a good essay consists of. Vedantu essay is concise and apt for school-going, students. It uses simple language, perfect for students with limited vocabulary. Following the Vedantu essay enables students to be sufficiently prepared for any essay topics and guarantees that students will score good marks. To access the Essay on Plastic Ban, click on the link available above.

4. Why is plastic bad for the environment?

Nonrenewable resources such as coal, natural gas, and crude oil are used to make plastics. Because plastic bags take a long time to disintegrate, they have a substantial environmental impact. If toxic compounds are allowed to deteriorate, there is concern that they will leak into the environment. Rather than degrading completely, plastic dissolves into smaller chunks and microscopic particles known as microplastics. Microplastics regularly end up in bodies of water, endangering animals. Furthermore, dangerous chemicals are released into the soil when plastic bags degrade in the sun, and harmful substances are released into the air when plastic bags are burnt, resulting in air pollution. All of these reasons make plastic one of the most harmful materials on the earth for all of these reasons. Plastic is one of the main reasons for Global Warming and thus needs to be eliminated from the world.

5. Is writing an essay hard?

Essay writing is a difficult task that needs a great deal of study, time, and focus. It's also an assignment that you can divide down into manageable chunks such as introduction, main content, and conclusion. Breaking down and focusing on each individually makes essay writing more pleasant. It's natural for students to be concerned about writing an essay. It's one of the most difficult tasks to do, especially for people who aren't confident in their writing abilities. While writing a decent essay is difficult, the secret to being proficient at it is reading a lot of books, conducting extensive research on essential topics, and practicing essay writing diligently.

6. Who prepares the essay on global warming for Vedantu?

The Essay on Effects on Global, designed by Vedantu, is created by a group of experts and experienced teachers. The panel of experts have created the essay after analyzing important essay topics that have been repeatedly asked in various examinations. The Essays that are provided by Vedantu are not only well-structured but also accurate and concise. They are aptly suited for young students with limited vocabulary. For best results, the students are advised to go through multiple essays and practice the topics on their own to inculcate the habits of time management and speed.

7. What will be the impact on the phenomena of Global Warming if we ban plastic and petroleum products?

Plastic and petroleum product bans can undoubtedly aid in the conservation of non-renewable resources that, once gone, may not be recovered. Plastic use has two significant negative consequences: it emits carbon dioxide, which contributes to the greenhouse effect, and it increases rubbish collecting in landfills and seas. Bans should be implemented since they are successful in eliminating large amounts of plastic trash. Plastic can be eliminated; but, it will need advances in engineering and applied science, and the capability to do so currently exists. With each passing year, humanity's reliance on plastic gets greater. Thus, one of the only ways to eliminate or reduce global warming is through the elimination of the use of plastic and petroleum products.

Global Warming Awareness Essay

Introduction

While talking about environmental pollution , children might have heard how it leads to various problems like global warming and climate change. Whenever the topic is discussed, global warming takes centre stage. Despite the repetitive utterance of the word, children fail to understand its real meaning or importance. So, this global warming awareness essay is aimed at the young learners to better acquaint them with the problems faced due to global warming.

Global warming is a phenomenon where the temperature gradually increases in the atmosphere of Earth due to both natural and human-made causes. As global warming results in climate change and the melting of glaciers, which will have serious repercussions on Earth and the living beings on the planet, efforts should be made to control it. The short essay on global warming awareness will throw light on this aspect, thus highlighting the significance of creating awareness of the phenomenon.

Importance of Global Warming Awareness

Global warming will affect us today or tomorrow. Though its effect can only be seen in a few places now, it won’t be long before it hits other places too. So, it is not wise for us to sit calmly and think that we are not being affected. In the global warming awareness essay, we will be discussing the causes of global warming , thereby emphasising the need to address the concern.

It is said that the increase in greenhouse gases results in global warming, which, in turn, leads to severe consequences like the melting of ice as well as causing frequent droughts and floods. But people are not aware of these problems, and they believe that all these things are merely said for the sake of it. This is why we must educate them about global warming and its issues through the short essay on global warming awareness essay so that we can take one step at a time in protecting ourselves and our planet.

Ways to Raise Global Warming Awareness

Global warming is not a simple topic to make our children familiar with, but this global warming awareness essay will help you in making your task easier. Let us make them realise by connecting their feelings to that of a polar bear. We can simply ask our children how they would feel when their home is taken away and they are left to live without it. Then, we can link it to the situation of the polar bear, where its home (glaciers) is destroyed due to global warming.

Similarly, we can encourage them to show respect towards our planet through small yet impactful actions, like switching off lights when not in use, cleaning the surroundings etc. By teaching these actions, we are saving ourselves when we care for our Earth, and we can help them grow as conscientious individuals.

Let this short essay on global warming awareness essay be a guide for our children to realise the problems faced by us. You can also check out other essays on BYJU’S website that will make our children knowledgeable.

Frequently Asked Questions on Global Warming Awareness Essay

Why is it necessary to have awareness about global warming.

If people are not aware of global warming, we will not be able to stop our planet from destruction, and our lives will be impacted severely. Hence, it is necessary to create awareness about global warming.

How will the global warming awareness essay be useful for children?

The essay will be useful for children to understand more about global warming, its causes and effects. As they will be informed about it, they will be careful in their actions to not harm our planet.

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February 25, 2016

Did Global Warming Slow Down in the 2000s, or Not?

Scientists clarify the recent confusion

By Gayathri Vaidyanathan & ClimateWire

©iStock.com

The global warming “hiatus,” a controversy that spawned congressional hearings and thousands of skeptical blog posts before being curbed last year, is back.

The “hiatus” refers to the observation that global warming has slowed in the past 15 years. The planet is still warming, but just not as quickly as some climate scientists expected it to.

The debate between researchers and doubters reached a crescendo last summer, when scientists at the National Oceanic and Atmospheric Administration updated their temperature records and concluded that global warming has not slowed down in the 2000s ( ClimateWire , June 5, 2015).

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Now, a group of prominent climate scientists are challenging NOAA’s conclusion in a commentary  published this week in  Nature Climate Change .

This graph shows a “slowdown” in rising temperatures until 2010. The black line shows temperatures as predicted by climate models, and the red line shows actual temperatures. Warming has recently increased, breaking historical records in 2014 and 2015. Nature Climate Change, February 24, 2016 doi:10.1038/nclimate2938

“The interpretation [the NOAA group] made was not valid,” said John Fyfe, a climate scientist at Environment and Climate Change Canada and lead author of the commentary. “The slowdown is there, even in this new updated data set.”

The disagreement may seem esoteric, but it underpins the biggest climate disagreement of the past decades. Climate models, which are virtual representations of our planet, project that temperatures were much higher in the early 2000s than was the case in reality. Scientists have been trying to understand why.

Suggestions abound, from cooling aerosols spewed by volcanic eruptions to natural shifts in the Pacific Ocean that happen every decade.

Meanwhile, skeptics have seized on the mismatch to suggest that global warming stopped in 1998. Almost all scientists disagree with this. But there are questions about the rate of warming. Most recently, the NOAA study suggested that rising temperatures never even slowed.

Not worried about fueling skepticism

The NOAA study’s release last summer coincided with a science meeting in Colorado where scientists were discussing how to engineer models to accurately predict climate changes in the coming decades on a regional scale. To do so, they would first have to figure out why models had not projected the global warming slowdown.

With the NOAA study’s release, there was this perception that, “Oh, there’s been no slowdown in warming,” said Gerald Meehl, a climate scientist at the National Center for Atmospheric Research and a co-author of the new commentary.

The scientists decided to counter the narrative in the boxing ring of academia. That is, a science journal.

It is possible that the scientific disagreement could spill over into the skeptic blogosphere. But that is not reason enough to sweep the slowdown under the rug, said Michael Mann, a climatologist at Pennsylvania State University and a co-author.

“As scientists, we must go where the evidence takes us, we can’t allow our worries about climate contrarians and how they might seek to misrepresent our work to dictate what we do and do not publish,” he said.

The blowback against the NOAA study has been some time coming. Tom Karl, lead author of the NOAA study and director of NOAA’s National Centers for Environmental Information, and his colleagues compared warming over the past 15 years with the long-term temperature trend between 1950 and 1998 (a 48-year stretch).

But scientists say Karl’s comparison of a 15-year stretch with a 48-year stretch was somewhat arbitrary. It is meant to answer the question, has global warming stopped in the long run? The answer to that is a resounding “no,” they say.

Scientists are more interested in explaining fluctuations in global temperatures over 10- and 20-year stretches. Throughout Earth’s history, global temperatures have risen and fallen in step with natural fluctuations in the climate system that scientists are only just beginning to unravel.

Karl said that understanding this decadeslong variability is important, and his study had dealt with the long-term trend.

“There is no disagreement that there is decadal variability, and that it is real and needs to be better understood,” he said, referring to natural causes of warming.

Models ‘not perfect’

One decadal variability played out recently, when warming slowed to 0.11 degrees Celsius per decade between 2001 and 2010. The rate was 0.17 C per decade in the 15 years prior, Fyfe said.

Fyfe and his colleagues think the Pacific Decadal Oscillation (PDO), a natural variance in the climate system that switches between positive, neutral and negative phases, explains the recent slowdown.

When ocean temperatures in the tropical Pacific are warmer than usual—a positive PDO—the globe sizzles, Meehl of NCAR said.

And when the PDO flips to negative and the Pacific cools, global warming slows. The PDO was negative during the early-2000s, and this may explain the slowdown, Meehl said.

The only time the PDO was neutral in recent history was between 1971 and 2000, Fyfe said. In that case, the temperature record reflects the response to human-caused climate change, he said.

“This is the background trend that you would want to compare recent trends against,” he said.

There are other explanations for the slowdown and also for why climate models did not project it. It is possible that the world is not as sensitive to greenhouse gases as the models assume or factors that cool the planet are playing a bigger role than expected, Fyfe said.

“These models are not perfect, and they might be overly sensitive,” he said.

Answering these fundamental science questions should take precedence over worries about skeptics, Mann of Penn State said. Moreover, the slowdown is over. Record warmth occurred in 2014 and 2015.

“So we have every reason to believe that the warming of the planet and the detrimental impacts of that warming will continue unabated if we do not dramatically reduce our emissions,” Mann said.

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Reprinted from Climatewire with permission from Environment & Energy Publishing, LLC.  www.eenews.net , 202-628-6500