搜索结果: 1-15 共查到“理学 streams”相关记录84条 . 查询时间(0.071 秒)
Loss of biodiversity in streams threatens vital biological process
river ecosystem phosphorus nitrogen biodiversity
2021/8/5
The fast-moving decline and extinction of many species of detritivores -- organisms that break down and remove dead plant and animal matter -- may have dire consequences, an international team of scie...
Streams more vulnerable to stressors such as climate change than previously thought（图）
Streams more vulnerable stressors climate change previously thought
2021/3/19
Water is constantly on the move: through the air, through waterways, and underground. Life depends on a consistent supply of water, and details about its journey are necessary for understanding and ma...
Biologists find 10 lineages of fish able to live in highly toxic streams（图）
Biologists 10 lineages fish able live highly toxic streams
2020/7/10
Using the same mechanism, several species of fish have adapted to harsh environments, calling into question the idea of evolutionary chance, according to a National Science Foundation-funded stud...
FLASH FLOOD MAPPING FOR MOUNTAIN STREAMS USING HIGH-RESOLUTION ALOS-2 DATA
ALOS-2 Capacity building Flood detection Valley floodplain
2018/4/18
This paper introduces a practical way to improve the risk management capacity and resilience of communities by utilizing a prompt flash flood map produced from very high spatial resolution ALOS-2 data...
New Stellar Streams Confirm ‘Melting Pot’History of the Galaxy（图）
New Stellar Streams Melting Pot History of the Galaxy
2018/1/31
Where do the stars in our Galaxy come from? All the stars we see in the night-time sky belong to our Milky Way galaxy, and while most stars were likely born here, in the Milky Way, many appear to have...
Researchers Develop Novel Approach for Quantifying Nitrate Discharge from Groundwater to Streams
Researchers Quantifying Nitrate Discharge Groundwater Streams
2016/11/29
Novel groundwater sampling (age, flux, and nitrate) carried out beneath a streambed and in wells was used to estimate (1) the current rate of change of nitrate storage, dSNO3/dt, in a contaminated unc...
The western United States relies on mountain snow for its water supply. Water stored as snow in the mountains during winter replenishes groundwater and drives river runoff in spring, filling reservoir...
Nutrient pollution from nitrogen and phosphorus reduces streams' ability to support aquatic life
Nutrient pollution nitrogen phosphorus reduces aquatic life
2015/3/18
Nutrient pollution from nitrogen and phosphorus in streams has long been known to increase carbon production by algae, often causing nuisance and harmful algal blooms.But according to results of a new...
Nutrient pollution damages streams in ways previously unknown, ecologists find
Nutrient pollution damages streams previously unknown ecologists find
2015/3/18
Athens, Ga. - An important food resource has been disappearing from streams without anyone noticing until now.In a new study published March 6 in the journal Science, a team of researchers led by Univ...
Basal roughness of the Institute and Möller Ice Streams, West Antarctica: Process determination and landscape interpretation
Antarctica Roughness Radio-echo sounding Ice dynamics Mö ller Ice Stream Institute Ice Stream
2014/5/20
We present a detailed analysis of bed roughness beneath Institute and Möller Ice Streams, west Antarctica, using radio-echo sounding data (RES) acquired in the austral summer of 2010/11. We asses...
Influence of bed patchiness, slope, grain hiding, and form drag on gravel mobilization in very steep streams
Influence of bed patchiness slope grain hiding form drag on gravel mobilization very steep streams
2014/4/8
Steep streams are a major portion of channel networks and provide a link to transport sediment from hillslopes to lower gradient rivers. Despite their importance, key unknowns remain, perhaps foremost...
Authentication of Digital Streams
Adversarial network list recoverable codes polynomial reconstruction problem stream authentication
2012/12/4
We study the multicast stream authentication problem when the communication channel is under control of an opponent who can drop, reorder and inject data packets. Recently, many coding theory based pr...
Linearized flavor-stability analysis of dense neutrino streams
Linearized flavor-stability analysis dense neutrino streams
2011/10/18
Neutrino-neutrino interactions in dense neutrino streams, like those emitted by a core-collapse supernova, can lead to self-induced neutrino flavor conversions. While this is a nonlinear phenomenon, t...
Black Hole growth and AGN obscuration by instability-driven inflows in high-redshift disk galaxies fed by cold streams
instability-driven inflows high-redshift disk galaxies cold streams
2011/9/29
Disk galaxies at high redshift have been predicted to maintain high gas surface densities due to continuous feeding by intense cold streams leading to violent gravitational instability, transient feat...
The Small Covering Factor of Cold Accretion Streams
cosmology theory { galaxies formation and evolution high-redshift radiative transfer
2010/11/11
Theoretical models of galaxy formation predict that galaxies acquire most of their baryons via cold mode accretion. Observations of high-redshift galaxies, while nding strong evidence for ubiquitous ...