News related to geography has the best evaluation. 10

Every day when I turn on my computer and open a web page, there is a special magical feeling. All the unreliable ideas that you used to frantically imagine in your childhood are always discussed in a serious way in some dark corner as a major matter to save the country and the people.

The topography of our country is complex and diverse, with mountainous areas (mountains, rugged plateaus, hills) covering a vast area. The terrain is complete, various terrains are staggered, mountains account for about 33 of the country's land area, plateaus account for about 26, basins account for about 19, plains account for about 12, and hills account for about 10.

China's diverse topography has provided favorable conditions for the development of agriculture, forestry, animal husbandry, and sideline management in accordance with local conditions.

The plains and hills are mainly distributed in the eastern part of our country with superior climatic conditions, which is very conducive to the development of planting industry.

The mountainous area is vast, on the one hand, there are disadvantages of inconvenient transportation and unsuitable infrastructure, but on the other hand, the mountainous area has many mineral resources and tourism resources, and at the same time is conducive to the development of forestry.

By 2010, there was an El Niño phenomenon around the world.

In January, Haiti was the greatest, reaching hundreds of thousands of people.

In January, northern Xinjiang and Mongolia were hit by severe snowstorms.

On February 13, the Vancouver Winter Olympics officially began.

In February, the Spring Festival began in Beijing.

9. The pressure on the Beijing-Guangzhou line is huge. This loss.

In January, the forest fire risk in Yunnan and western Sichuan continued to be high, and many large fires were caused.

In February, China determined the base point of the East China Sea, indicating that China's maritime boundary was determined to be bent.

In January, the tidal flats near the Yellow Sea were hit by ice floes, and the marine aquaculture industry was severely hit.

Chinese scientists"Deciphered"The mystery of the differences in the biogeographic pattern of the Sunda continent.

According to the researchers, the Sunda continent is surrounded by accretive complexes of different ages and accretive micro-landmasses that split into the Gondwana continent, and the continental accretion of the eastern and southern margins of the Sunda continent is due to the accretion of Mesozoic and Cenozoic sediments and the collision of land masses. The biogeographic patterns of the western (Peninsular Malaysia and Sumatra) and eastern (Borneo) regions of the Sunda continent have significant differences, and these differences have been the focus of research.

It has been suggested that this is due to the diffusion barrier formed by the dry savanna corridor during the glacial period. However, the short duration of these savanna conditions may not be the only reason for these biogeographic differences. Another explanation may be related to the sandy soils of the Sunda continent**.

Ferry Slik et al., a researcher at the Botanic Garden's Phytogeographic Innovation Research Group, tested these two hypotheses by performing cluster analyses based on a catalogue of 111 tree species from Peninsular Malaysia, Sumatra and Borneo.

Researchers distinguished between indicator genera that are found in and around the Sunda continent** and genera that are only in certain areas, and used them to test whether they have differences in tolerance to arid and sandy soils. Eventually, they found 11 clusters of different fauna, 10 in Borneo, 5 in Sumatra, and 3 in Peninsular Malaysia. Indicator taxa that span the Sunda continent have significantly higher sandy soil tolerance than taxa that are only found in the eastern, western, or ** parts of the Sunda continent.

The test of drought tolerance did not reveal the existence of such a pattern.

Based on these results, they deduced that the sandy seabed soils of the Sunda continent** were the dispersal barriers, a finding that explains the genesis of the biogeographic pattern of plant and animal distribution in the Sunda continent. According to Ferry Slik, "this result necessitates a re-evaluation of a range of issues, including possible migration routes for early humans." ”

This topic is very big, can you be specific?

In 2011, the drought in North China was severe, and there was a serious shortage of water for winter wheat.

On July 2, Typhoon No. 10 "Lianhua" was generated, and on July 4, Typhoon No. 11 "Langka" was generated, and the center of Chanhong made landfall on the coast of Zhujiajian Town, Zhoushan City, Zhejiang Province at around 4:40 pm on the 11th, and Typhoon No. 12 "Soudelor" in 2015 made landfall on the east coast of Taiwan in the early morning of the 8th, and made a second landfall on the coast of Fujian from the evening of the 8th to the night.

On August 4, Shaanxi issued a blue warning for heavy rain, and landslides and debris flows may be triggered locally in southern Shaanxi.