搜索结果: 46-60 共查到“知识要闻 地球科学总论”相关记录718条 . 查询时间(3.287 秒)
New findings on the evolution of galaxies
galactic evolution SMBH AGN
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2021/8/10
Galaxies eventually undergo a phase in which they lose most of their gas, which results in a change into their properties over the course of their evolution. Current models for galaxy evolution sugges...
Scientists expose the cold heart of landfalling hurricanes
hurricane extratropical cyclone extreme weather predict weather
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2021/8/4
Fearsome and powerful, hurricanes can wreak massive destruction when they hit land. But while most hurricanes then weaken, others can strengthen again into extratropical cyclones and caused further da...
Microplastics in Arctic ecosystem discovered
microplastics Arctic ecosystem mollusks Coral red algae
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2021/8/6
Around the Svalbard archipelago in the Arctic Ocean, rhodoliths made up of coralline red algae provide ecological niches for a wide variety of organisms. A team of researchers has recently discovered ...
Lava lamp tectonics: Research suggests giant blobs of subducted sediment float up through deep Earth
lava lamp structure subduction sediment earthcrust
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2021/8/6
Sand and mud subducted off the coast of California around 75 million years ago returned to the Earth's crust by rising up through the mantle as enormous diapirs, like blobs in a lava lamp, new researc...
平流层弱极涡北半球寒潮倾向变强（图）
北半球寒潮 平流层 极涡减弱
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2021/8/4
兰州大学大气科学学院教授田文寿团队及国外合作者在《地球与环境通讯》发表题为《平流层弱极涡条件下北半球寒潮事件倾向于变得更强》的论文。指出，在北极平流层极涡减弱条件下北半球多数地区的寒潮可能更加严重，如东亚中纬度地区严重型寒潮的发生概率会增加100%，而适度型寒潮发生概率则增加40% 。
What’s killing coral reefs in Florida is also killing them in Belize
coral reefs ecosystem nitrogen concentration biodiversity algal bloom eutrophication river pollution
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2021/8/4
Only 17 percent of live coral cover remains on fore-reefs in Belize. A study finds new evidence that nitrogen enrichment from land-based sources like agriculture run-off and sewage, are significantly ...
What’s killing coral reefs in Florida is also killing them in Belize
coral reefs ecosystem nitrogen concentration biodiversity algal bloom eutrophication river pollution
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2021/8/4
Only 17 percent of live coral cover remains on fore-reefs in Belize. A study finds new evidence that nitrogen enrichment from land-based sources like agriculture run-off and sewage, are significantly ...
Harmful algal blooms jeopardize health of reptiles, songbirds
wild animal immune system harmful algal blooms
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2021/8/11
A new study has identified the inconsistent response of wildlife to harmful algal blooms in the Great Lakes region from higher stress levels to weaker immune systems.
California's carbon mitigation efforts may be thwarted by climate change itself
climate change carbon mitigation ecosystem
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2021/8/3
To meet an ambitious goal of carbon neutrality by 2045, California's policymakers are relying in part on forests and shrublands to remove CO2 from the atmosphere, but researchers warn that future clim...
Russian Arctic losing billions of tons of ice as climate warms
climate warm ice Russian Arctic
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2021/8/3
Glaciers and ice caps in two archipelagos in the Russian Arctic are losing enough meltwater to fill nearly five million Olympic-size swimming pools each year, research shows.
Emperor penguins increasingly threatened by climate change
climate change species extinction risk penguins ecosystem extreme climate
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2021/8/4
A new study provides valuable new data that highlights how species extinction risk is accelerating due to rapid climate change and an increase in extreme climate events, such as glacial calving and se...
State of the science on western wildfires, forests and climate change
wildfires forests climate change climate warming
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2021/8/4
Seeing the urgent need for change, a team of scientists from leading research universities, conservation organizations and government laboratories across the West has produced a synthesis of the scien...
Overfishing and other human pressures are severely harming many marine protected areas around the world, study finds
ecological destruction edge effect marine conservation areas MPA
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2021/8/11
A new study points to a strong 'edge effect' in marine protected areas (MPAs), sharply reducing by 60 percent the fish population living up to 1 - 1.5 km within the MPA. This significantly diminishes ...
Sea levels influence eruptions on volcanic island
sea levels volcanic eruption climate change
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2021/8/3
The rise and fall of sea levels influence the likelihood of volcanic eruptions on the Greek island of Santorini, new research has discovered. Analyzing the timings of eruptions over hundreds of thousa...
Oxygen spike coincided with ancient global extinction
oxygen spike climate change ocean
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2021/8/3
Researchers have found that the extinction at the end of the Permian period coincided with a sudden spike and subsequent drop in the ocean's oxygen content.