AGU期刊一周Research Spotlight (Mar 30~Apr 06, 2016)

发布时间:2016-4-7 15:10:28 点击次数:1377
I. Atmospheric Sciences
1. Forecasting India's Water Future

The NORINDIA project sheds light on how climate change could affect monsoons, droughts, and glaciers in northern India.


II. Geology & Geophysics
1. Author Tells Tale of Cellular Engines That Power Life

The American Geophysical Union held a public lecture to introduce a new book about how microbes changed the world.


2. Massive Ancient Tectonic Slab Found Below the Indian Ocean

Scientists discover a surprisingly positioned tectonic plate, buried below the southern Indian Ocean, that spans the entire mantle.


3. Earthquakes May Prevent Underwater Landslides
Smaller quakes around the active edge of continental plates may contribute to increased stability by promoting compaction and solidifying the top 100 meters of seafloor sediment.


III. Hazards & Disasters

1.Sound Waves Help Scientists Track Volcanic Eruptions
When sound waves hit the ground, they shake seismometers like earthquake waves. Scientists can now use these sound-induced seismic waves to investigate volcanic activity.


IV. Science Policy

1. U.S.-Cuba Scientific Cooperation Revs Up
The administration has sought to promote scientific collaboration with Cuba by reducing restrictions on travel and equipment donations and forging research partnerships.


V. Ocean Sciences

1. Drifting Floats Reveal Nitrate Patterns in Mediterranean Sea

Next-generation autonomous platforms allow scientists to understand physical mechanisms that control nitrate availability in the Mediterranean surface water.


2. Tide Pools Mimic Climate Change in Everyday Cycle

Researchers unexpectedly discovered that tiny shoreline ecosystems act as miniature laboratories in which ocean acidification and its effects play out nightly.


3. Growing Network of Radar Systems Monitors Ocean Surface Currents
Fourth Meeting of the Global High Frequency Radar Network; Heraklion, Crete, Greece, 22–23 September 2015


VI. Space Science & Space Physics

1. Toward an Understanding of Earth-Affecting Solar Eruptions
Coronal mass ejection forecasting improves with technological developments and increasing availability of data.


VII.Hydrology, Cryosphere & Earth Surface

1. A Warm Day Can Trigger Rockfalls

Research on a cliff face in Yosemite National Park finds that when rockfalls happen without an obvious cause, ordinary warming in the Sun could be the culprit.


2. Gender Diversity in Cryosphere Science and Awards
A focus group’s executive committee asks whether the number of accolades given to women reflects the demographics of scientists within the field, from students to senior researchers.


VIII. Education

1. Learning About Teaching: Geoscience Educators Share Insights
Earth Educators' Rendezvous; Boulder, Colorado, 13–17 July 2015

IX. Space & Planets
1.Space Telescope Findings Suggest Molten Planetary Surface
Researchers studying the super-Earth 55 Cancri e spotted some puzzling features that provide a new vision of the orb's surface.

X.Earth and Space Science
1. Heavy rainfall brings extensive landsliding to Kohistan and other parts of northern Pakistan

In the last few days another belt of exceptional rainfall has swept across northern Pakistan, including Kohistan, triggering large numbers of landslides as well as avalanches and floods.  The most destructive incident appears to have occurred at Othar Nala village in Kandia, Kohistan district, where a large landslide destroyed a number of houses. 


2. Melt-driven streams on Greenland’s ice sheet shape landscapes faster than rivers on land

The Greenland ice sheet is the second largest ice body in the world. New research shows that erosion by summertime melt-driven streams on the ice sheet shapes landscapes similarly to, but much faster, than do rivers on land.


3. Neumayer Glacier, South Georgia, 5.6 km retreat 1999-2016
South Georgia sits amidst the circum Antarctic westerlies and its maritime climate leads to numerous glaciers. This region is famous for the endless march of storms parading around Antarctica . The island is south of the Antarctic Convergence, preventing any truly warm season from persisting. The cool glaciers covering a majority of the island and quite low equilibrium line altitudes. Neumayer Glacier is one of the largest tidewater glaciers on South Georgia. Sugden, Clapperton and Pelto (1989) noted the ELA of Neumayer Glacier at 550 m.

XI. Geophysical Research Letters
1. Whole planet coupling between climate, mantle, and core: Implications for rocky planet evolution

Earth's climate, mantle, and core interact over geologic timescales. Climate influences whether plate tectonics can take place on a planet, with cool climates being favorable for plate tectonics because they enhance stresses in the lithosphere, suppress plate boundary annealing, and promote hydration and weakening of the lithosphere. Plate tectonics plays a vital role in the long-term carbon cycle, which helps to maintain a temperate climate. Plate tectonics provides long-term cooling of the core, which is vital for generating a magnetic field, and the magnetic field is capable of shielding atmospheric volatiles from the solar wind. Coupling between climate, mantle, and core can potentially explain the divergent evolution of Earth and Venus. 


2. Thermokinematic evolution of the Annapurna-Dhaulagiri Himalaya, central Nepal: The composite orogenic system

The Himalayan orogen represents a 'Composite Orogenic System' in which channel flow, wedge extrusion and thrust stacking operate in separate 'Orogenic Domains' with distinct rheologies and crustal positions. We analyze 104 samples from the metamorphic core (Greater Himalayan Sequence, GHS) and bounding units of the Annapurna-Dhaulagiri Himalaya, central Nepal. 


3. MILE-HIGH MARS MOUNDS BUILT BY WIND AND CLIMATE CHANGE

WASHINGTON, DC — New research has found that wind carved massive mounds of more than a mile high on Mars over billions of years. Their location helps pin down when water on the Red Planet dried up during a global climate change event.


4. The Response of Local Power Grid at Low-Latitude to Geomagnetic Storm: An Application of the Hilbert Huang Transform
The Hilbert-Huang transform (HHT) is an adaptive data analysis method that can accommodate the variety of data generated by nonlinear and non-stationary processes in nature. In this paper, we focus on the small geomagnetically induced current (GIC) at the local substations in low-latitude power grid of China, responding to a moderate storm on 14-18 July, 2012.