Greece encounters the strongest cold front in 12 years. Do you know what the temperature change is related to?

Xinhua News Agency, Athens, February 16 (Reporter Yu) Lengfeng? Medea? Since the night of 15, it has brought obvious cooling and rainy and snowy weather to most parts of Greece. According to local meteorologists, this is the strongest cold front Greece has encountered in the past 12 years. ? Medea? 13 entered Greece, bringing temperatures and strong winds below zero degrees Celsius to Greece from west to east. According to the monitoring data of Athens National Astronomical Observatory, the lowest temperature in Greece appeared in Cozany in the north, with a time of-19.9 degrees Celsius in June of 5438+05. That night, the snow in the northern part of Athens, the Greek capital, reached more than ten centimeters. Theodoros, head of the Greek National Meteorological Center? Coridass told the media that this was the strongest cold front that Greece encountered in the past 12 years. No matter the intensity or snowfall, this round of snowfall is the strongest in 12 years. .

The change of temperature is related to the change of weather. In meteorology, the physical quantity indicating the degree of air heat and cold is called air temperature, which is referred to as air temperature for short. The international standard unit for temperature measurement is Celsius (℃). Generally speaking, the change of temperature is due to the change of weather. Weather phenomenon refers to various natural phenomena in the atmosphere, that is, the comprehensive expression of the spatial distribution of various meteorological elements in the atmosphere (such as temperature, pressure, humidity, wind, clouds, fog, rain, snow, frost, lightning, hail, acid rain, etc.). ) in an instant, thus causing changes in the ambient temperature.

Causes of daily and annual temperature changes The temperature changes in different days and years. ?

Daily changes, due to the radiation of the sun and other reasons, the highest temperature is around 2 pm, and the lowest temperature is around sunrise. Annual change, due to the change of direct sunlight and the existence of specific heat capacity of seawater, it is the hottest in July in the northern hemisphere, the coldest in 65438+ 10, the hottest in August in the ocean and the coldest in February. The southern hemisphere is opposite to the northern hemisphere. ?

The appearance of special weather changes the temperature. Of course, sometimes a series of weather changes will make the temperature change suddenly, suddenly or suddenly. Take the cold front in Greece as an example. Because cold air is heavy and warm air is light, when the cold air mass moves, it will form a cold air mass that actively wedges under the warm air mass, forming a front at the junction of cold and warm air. When a cold front crosses the border, cumulonimbus clouds, thunderstorms and heavy precipitation often occur. If the cold front moves fast, cumulonimbus clouds are distributed in the narrow area in front of the front, and then it will turn from local cloudy to sunny quickly after the front; If the cold front moves slowly, it will form a large range of high-level clouds and nimbostratus. The formation of the above-mentioned weather changes caused Greece to encounter a cold front and the temperature plummeted.

The special reasons that make the earth's temperature change, such as population growth, the increase of factories and the increase of exhaust emissions, make the overall temperature of the earth rise.