搜索结果: 1-15 共查到“理学 North America”相关记录30条 . 查询时间(0.071 秒)
Warm oceans helped first human migration from Asia to North America（图）
Warm oceans first human migration Asia to North America
2020/12/31
New research reveals significant changes in the circulation of the North Pacific Ocean and their impact on the initial migration of humans from Asia to North America.The U.S. National Science Fou...
North America's freshwater lakes are getting saltier
North America freshwater lakes getting saltier
2017/4/27
North America's freshwater lakes are getting saltier due to development and exposure to road salt. A study of 371 lakes published today in the Proceedings of the National Academy of Sciences reports t...
SPE Health, Safety, Security, Environment, & Social Responsibility Conference – North America
Safety Security
2016/7/27
Since 1993, this conference has brought together HSE professionals for knowledge sharing, learning and networking. Experts from industry, government, and academia attend to share insights and best pra...
Well-preserved fossils show ostrich relatives lived in North America 50 million years ago
fossils ostrich relatives North America 50 million years ago
2016/7/15
Exceedingly well-preserved bird fossil specimens dating 50 million years represent a new species that is a previously unknown relative of the modern-day ostrich, according to a new paper co-authored b...
Scientists have discovered the first-ever fossil evidence of monkeys from the North American landmass: a 21-million-year-old specimen that changes our understanding of the biological history of the co...
The genera of diaspinae of North America and the genus lepidosaphes
genera of diaspinae North America genus lepidosaphes
2015/1/24
The genera of diaspinae of North America and the genus lepidosaphes.
A NEW SPECIES OF MOROPUS (MAMMALIA, PERISSODACTYLA, CHALICOTHERIODEA) IN THE BATESLAND FORMATION, GREAT PLAINS AREA OF NORTH AMERICA
Great Plains Batesland Formation Miocene
2015/1/4
The chalicothere Moropus was a rare perissodactyl present in the Great Plains region of North America through much of the Miocene. A temporal gap in named species of Moropus is present in the early He...
The Industrial Minerals Association of North America
ball clay barite bentonite borates calcium carbonate diatomite
2012/3/6
The Industrial Minerals Association - North America (IMA-NA) is the representative voice of companies which extract and process a vital and beneficial group of raw materials known as industrial minera...
Unraveling the complex local-scale flows influencing ozone patterns in the southern Great Lakes of North America
the complex local-scale flows ozone patterns the southern Great Lakes of North America
2010/11/30
This study examines the complexity of various processes influencing summertime ozone levels in the southern Great Lakes region of North America. Results from the Border Air Quality and Meteorology (BA...
Centers for Marine Renewable Energy in Europe and North America
Marine renewable energy wave tidal current power wave energy
2015/7/7
Since the late 1990s, there has been increased interest in marine renewable energy, such as wave and tidal current. Wave and tidal current energy has the potential to supply 15% of the UK's electricit...
Smoke injection heights from fires in North America: analysis of 5 years of satellite observations
Smoke injection heights fires North America
2010/2/21
We analyze an extensive record of aerosol smoke plume heights derived from observations over North America for the fire seasons of 2002 and 2004–2007 made by the Multi-angle Imaging SpectroRadiometer ...
Long-range climate forecasting and its use for water management in the Pacific Northwest region of North America
Long-range climate forecasting water management Pacific Northwest region North America
2009/12/7
Ongoing research by the Climate Impacts Group at the University of Washington focuses on the use of recent advances in climate research to improve streamflow forecasts at seasonal-to-interannual, deca...
Forest floor carbon exchange of a boreal black spruce forest in eastern North America
Forest floor carbon exchange boreal black spruce forest eastern North America
2010/1/21
This study reports continuous automated measurements of forest floor carbon (C) exchange over feathermoss, lichen, and sphagnum micro-sites in a black spruce forest in eastern North America during sno...
Organic composition of single and submicron particles in different regions of western North America and the eastern Pacific during INTEX-B 2006
single and submicron particles western North America eastern Pacific INTEX-B 2006
2009/8/7
Single particles were collected from an aircraft platform as part of the Intercontinental Chemical Transport Experiment – Phase B (INTEX-B) conducted over the eastern Pacific and western North America...
Summertime impact of convective transport and lightning NOx production over North America: modeling dependence on meteorological simulations
convective transport lightning NOx production North America meteorological simulations
2009/7/15
Global-scale chemical transport model simulations indicate lightning NOx dominates upper tropospheric O3 production above Eastern North America during summertime but vary in their estimates. To improv...