What Is The Temperature Now

What Is The Temperature Now - This global map shows the difference in temperature compared to the pre-industrial era. Darker blue means cooler temperatures. In the past, the ice sheets overlapped the continents. Credit: Jessica Tierney

A team led by the University of Arizona lowered the temperature of the last ice age — the last glacial 20,000 years ago — to 46 degrees Fahrenheit.

What Is The Temperature Now

Their results will allow climate scientists to better understand the relationship between the current increase in carbon dioxide in the atmosphere - a major greenhouse gas - and global temperatures.

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The Last Glacial Maximum, or LGM, was a cold period when ice sheets covered half of North America, Europe and most of South America and Asia, but cold-weather plants and animals flourished.

"There's a lot of data on this period because it's been studied for so long," said Jessica Tierney, an assistant professor in the Department of Geology at the University of Arizona. "But one question that science has long sought to answer is simple: How cold was it during the Ice Age?"

It found that the average global temperature during the Ice Age was 6 degrees Celsius (11 F) cooler than today. For context, the global average during the 20th century was 14 C (57 F).

"It may not seem like a big change in your personal experience, but it really is a big change," Tierney said.

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He and his team created maps to show the temperature changes in specific regions around the world.

"In North America and Europe, most of the north was covered with ice and it was very cold. Here in Arizona there was also a big cooling," said Tierney. "But the biggest cooling was in high latitudes like the Arctic, where it should be. 14 C (25 F) colder than today."

"Climate models predict that high latitudes will be warmer than low latitudes," Tierney said. "When you look at future projections, the Arctic is very warm. It's called polar warming. Likewise, during the LGM, we see the opposite pattern.

Knowing ice age temperatures is important because they are used to calculate climate sensitivity, that is, how global temperatures change in response to carbon emissions. atmosphere.

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Tierney and his team determined that for every doubling of carbon in the atmosphere, global temperatures would have to rise by 3.4 C (6.1 F), which is in the middle of range predicted by climate models (1.8 to 5.6 C).

The level of carbon dioxide in the atmosphere during the ice age was 180 parts per million, which is very low. Before the Industrial Revolution, the level rose to about 280 parts per million, and today it stands at 415 parts per million.

"The Paris Agreement aims to keep global warming to no more than 2.7 F (1.5 C) above pre-industrial levels, but with greenhouse gas emissions rising carbon as high as they are, it will be very difficult to avoid more than 3.6 F (2 C) of warming," Tierney said. We have 2 F (1.1 C) under our belt, but warming will continue as the Earth's system responds to changes in carbon dioxide.” Modeling.

Since there were no thermometers during the Ice Age, Tierney and his team developed a model to translate data collected from marine plankton fossils into ocean temperatures. They then combined the fossil data with climate model simulations of the LGM using a technique called data assimilation used in climate predictions.

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"What happens at the weather office is measuring temperature, pressure, humidity and using those measurements to update forecast models and predict the weather," Tierney said. "Here, we use the Boulder, Colorado-based National Center for Atmospheric Research Climate Model to produce a hindcast of the LGM, and then update this hindcast with real-time data to predict climate."

In the future, Tierney and his team plan to use the same technique to recreate Earth's past warm periods.

"If we can reconstruct past warm climates, we can begin to answer important questions about how the Earth responds to high levels of carbon dioxide and improve our understanding of the potential for future climate change." ," he said.

Reference: Jessica E. Tierney, Jiang Zhu, Jonathan King, Steven B. Malevich, Gregory J. Hakeem and Christopher J. "Glacial cooling and climate sensitivity revisited" by Poulsen, August 26, 2020

High Heat, Some Weekend Storms

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Speaking of the wind, it will remain steady today out of the WNW, providing cool air throughout the day. Temperatures will remain in the mid to upper 40s throughout the day. This means we will see a temperature difference of 40 degrees from yesterday's high, due to the current cold front in the east. The sky will also be clear, so we will have plenty of sun on a better note.

Winds should die down to between 5-10 mph before sunset as temperatures drop. A low of 25 degrees is forecast for Jackson tonight, with mostly clear skies. Sunday will bring more sunshine and less heat. The high will rise to the 50s tomorrow.

Clouds will move in from the south by mid-afternoon on Sunday, but temperatures will drop to a minimum. We will begin to see scattered showers across West Tennessee overnight, and by Monday morning it will become a more widespread event. Temperatures will be in the 60s on Monday and will be in the 70s again on Tuesday, but the rain will last until Wednesday. By the end of the week we'll be back to highs in the 50s and lows in the 30s with clear skies.

Stay in touch with the VIPIR 7 Storm Team on the air and online for the latest weather updates! Have a great and safe weekend everyone! This is an archived article and the information in the article may be out of date. Check the label to see when the story was last updated.

What Is The Earth's Average Temperature?

It was a great day around the Hoosier State on election day! In the afternoon there was full sun and mild temperatures. The high temperature in Indianapolis on Tuesday reached 66°, warmer than the normal temperature of 58°.

Even today there is a great atmosphere! The temperature this morning is 10 degrees higher than Tuesday morning. It may not be that cold this morning, but a jacket and sunglasses are still needed today.

In the afternoon, the sky is clear and the southerly wind raises the temperature. Highs will be near the 70° mark this afternoon!

Weather is generally calm throughout the lower 48 as high pressure dominates the pattern. By the end of the week, the weather will remain dry in central Indiana. Clouds will build early next week and heavy rain will return next Tuesday.

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There will be plenty of dry hours to spend outside before we see a cooler change in weather.

Eta is now a tropical storm over Nicaragua and Honduras as of Wednesday morning. It still produces sustained winds of 70 mph, weaker than a Category 1 hurricane (74 mph). The storm will move northeast over warmer waters in the Caribbean and may intensify again. It could affect Florida next week.

Indoor air conditioners provide humidity with one of four different technologies and come in a variety of sizes to fit different living spaces.

To help you complete your shopping this year,

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