Why Is Winter So Warm Now? - Pacific Standard

In the season when traditionally dedicated to snow, a series of outdated warm weather means that almost no one is in the United States.

A coastal-to-coastal holiday heatwave signifies last Thursday in November, only 6% of the country is about one-third of the typical value of the past 15 years. In the past seven days, the record high temperature of 1,550 was recorded nationwide. Almost every corner of the country is warmer than usual

In some parts of the west, it is actually T - shirt weather. For example, the temperature of the Rocky Mountains is more common in the middle of June than at the end of November. On Monday, Denver reached 81 degrees - at 34 degrees warmer than Los Angeles, Houston or Florida tampa, this is the warmest temperature recorded in November. On the same day, in Salt Lake City, this unusually warm city recorded record high at 2:20 in Tucson, Arizona, recorded the highest value on Thanksgiving weekend 4 days, 92 degrees on Sunday - The best reading ever this year

Warm weather prevents the opening of ski areas and ice rinks, but it benefits construction workers and retail shopping within the facility. In many places, it feels like the day before December. The season itself is very confusing

There is a science of what is going on here. Anthropogenic climate change shortens the worldwide winter period, the cold will be late in the fall and never last long in the spring. Winter is the warmest season in most parts of the United States. It is because the energy of the sun will improve because the soil and the surface of the plant are dark as the snow decreases.

The emergence of La Nina also helps to move the jet north and is free in South America due to warm tropical air - this model is expected to last through the winter

Jet movement also means that it has recently been very dry recently in most of the southern states. Since 1 October, the rainfall in Los Angeles is only 0.11 inches, the rainfall in Texas began to increase The situation just two years later, Hurricane Harvey brought the worst rainfall in the history of the United States. This week the US drought monitoring recorded the largest weekly increase in "moderate drought" measured in autumn and winter. Over 21% of the country is currently in official drought, is expected to spread and intensify over the next few months.

The warm climate is experiencing the same intense heat waves not only in Australia, China and the Arctic Circle. In Greenland, the temperature on Thursday is normal 36 degrees.

The El Nino phenomenon is a global warming phenomenon occurring once in a tropical Pacific Ocean. During the El Niño phenomenon, ocean current changes resulted in warm water inflows from the East Pacific. This has had widespread impact on the weather around the world, including short-term rise in global temperature. (In Canada, the El Niño phenomenon is usually related to the warm winter.) The greenhouse effect is mainly carbon dioxide, methane and steam. Due to precipitation and evaporation, the amount of moisture in the atmosphere is changing. The amount of carbon dioxide and methane in the atmosphere tends to fluctuate more slowly. An event that adds carbon dioxide or methane to the atmosphere like a volcanic eruption or a forest fire is called a "source". The process of releasing these gases into the atmosphere such as photosynthesis and ocean absorption is called "sink".

The El Nino phenomenon is a temporary change of the Pacific climate near the equator. You can see its effect in the ocean and atmosphere, usually in the winter of the Northern Hemisphere. Normally the surface temperature of the ocean rises by several degrees. At the same time, the thunderstorm area that occurred in the equator moved to the east. These may seem trivial, but they may have a major impact on the world climate. Normally, the wind blows strongly from the east to the west along the equator of the Pacific Ocean. This is actually the water in the western Pacific (about half a meter). In the east, deeper water (colder than the warm surface water on the sun) is lifted from below and replaces the water propelled to the west. Therefore, the usual condition is hot water (about 30 ° C) in the western part and cold water (about 22 ° C) in the eastern part.