This is a big change to the Earth Climate.0: 00/3: 30 South Earth's enchantment, is all areas with freezing water on earth, have been narrowed on average a year about 87,000km each year. Square, during 1979 to 2016, according to information from a new study. This is the first study to provide a global estimate of the earth's surface area covered by the sea, snow covered and frozen ground. To be easily visualized, the area of Hanoi capital is 3,359 km of square, meaning every year, the earth loses the volume of albums nearly 26 times the capital of our country
. The coverage of the frozen land is also important It is as important as its volume because the white surface reflects sunlight very effectively, cooling the planet. Changes in size or location of tape and snow can change air temperature, change sea level and even affect the roadside currents worldwide. The fake Xiaoqing Peng, a home Physical geography at Lanzhou University, said: "Icem is one of the most sensitive climate indicators and the first index prove a changing world
The change in its size represents a large global change, not just a regional or local problem. "The cast contains nearly 3/4 of the Earth's fresh water and in some Mountainous areas, glaciers are declining threatening drinking water supply. Many scientists have recorded icebreaks that are shrinking, the snow coating decreases and the amount of ice in the North Sea is lost due to climate change. But no previous studies reviewed the entire range of ice on the earth's surface and its reaction with warm temperatures.Peng and his co-authores from Lanzhou University calculated the level Daily alley level and take the average values to provide annual estimates. While the scope of the stage of development and narrowing seasonally, they discovered that the average area covered by the Earth's alley has narrowed significantly since 1979, correlates with increased air temperature Up. Sea ice melting in the ocean ocean decline mainly in the Northern Hemisphere, takes about 102,000 square kilometers per year. Those losses are offset a bit thanks to the growth in the hemisphere, where the frontage increased by about 14,000 km annually. This growth mainly occurs in the sea of ice in the Ross Sea around the Antarctica, which can be due to the wind types and ocean flow and the addition of cold water dissolved from the ice sheets in Antarctica. Show not only narrowed global gaps but the freezing time of many areas was also shorter
The average freezing day today occurred later than about 3.6 days compared to 1979 and the ice melted earlier about 5.7 days of Marshall, the gang at the University of Calgary, who did not participate in the study, said: "This type of analysis is a good idea for a global indicator or climate change index. He said the next step would be to use these data to check the time of ice and snow covered the earth with the highest brightness, to see how changes in the reflection (albedo) impacted Seasonal climate or monthly and this is changing how time. To synthesize their global estimates of the scope of barriers, the authors have divided the planet's surface into a grid system. They used existing data sets to the scope of sea glass, snow coating and global freezing soil, to classify each cell as part of the brochure if it contains at least one of the three components. After that, they estimate the level of daily, monthly and annual alley and check how it changed for 37 years. The percentage of each area undergo tape, snow or face The soil freezes at the time of the year (1981-2010) the authors say that the global data set can now be used to further explore the impact of climate change on the alley and changes How does this impact on the ecosystem, carbon exchange and time of animal dynamic cycles.Tham: scitechdaily . Dịch vụ:
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