Journal Highlights

RESEARCH BOLSTERS POSSIBILITY OF PLATE TECTONICS ON EUROPA

Press Release

SUBDUCTION—THE SLIDING OF ONE TECTONIC PLATE BENEATH ANOTHER--IS POSSIBLE ON THE ICE SHELL OF JUPITER'S MOON EUROPA, A NEW STUDY SHOWS. THE PROCESS COULD SUPPLY CHEMICAL FOOD FOR LIFE TO A SUBSURFACE OCEAN.

WASHINGTON D.C. — A recent study provides new evidence that the icy shell of Jupiter’s moon Europa may have plate tectonics similar to those on Earth. The presence of plate tectonic activity could have important implications for the possibility of life in the ocean thought to exist beneath the moon’s surface....more


Press Release—More Greenland glaciers threatened by climate change than previously thought

New maps of Greenland’s coastal seafloor and bedrock beneath its massive ice sheet show that two to four times as many coastal glaciers are at risk of accelerated melting due to climate change as previously thought.

In a new study, researchers at the University of California at Irvine (UCI), NASA and 30 other institutions have published the most comprehensive, accurate and high-resolution relief maps ever made of Greenland’s bedrock and coastal seafloor. The new study was published today in Geophysical Research Letters, a journal of the American Geophysical Union.

The top 200 meters (600 feet) of ocean water around Greenland comes from the Arctic and is relatively cold. But the water below 200 meters comes from farther south and is 3 to 4 degrees Celsius (6 to 8 degrees Fahrenheit) warmer than the water above…More

Article Category
Research Letters
The Cryosphere

BedMachine v3: Complete Bed Topography and Ocean Bathymetry Mapping of Greenland From Multibeam Echo Sounding Combined With Mass Conservation

M. Morlighem, C. N. Williams, E. Rignot, L. An, J. E. Arndt, J. L. Bamber, G. Catania, N. Chauché, J. A. Dowdeswell, B. Dorschel, I. Fenty, K. Hogan, I. Howat, A. Hubbard, M. Jakobsson, T. M. Jordan, K. K. Kjeldsen, R. Millan, L. Mayer, J. Mouginot, B. P. Y. Noël, C. O'Cofaigh, S. Palmer, S. Rysgaard, H. Seroussi, M. J. Siegert, P. Slabon, F. Straneo, M. R. van den Broeke, W. Weinrebe, M. Wood, K. B. Zinglersen
First Published:
| Vol:
44,
Pages
11,051–11,061
| DOI:
10.1002/2017GL074954
Open Access

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A Census of Atmospheric Variability from Seconds to Decades 

The atmosphere varies naturally on all length scales from millimeters to thousands of kilometers, and on all time scales from seconds to decades and longer.  This special collection of Geophysical Research Letters synthesizes and summarizes that variability through a phenomenological census.  The collection brings together some of the most influential and definitive papers to have been published in this journal in recent years.  The topics covered include turbulence on time scales of seconds and minutes, gravity waves on time scales of hours, weather systems on time scales of days, atmospheric blocking on time scales of weeks, the Madden–Julian Oscillation on time scales of months, the Quasi-Biennial Oscillation and El Niño–Southern Oscillation on time scales of years, and the North Atlantic, Arctic, Antarctic, Pacific Decadal, and Atlantic Multi-decadal Oscillations on time scales of decades.  The collection is accompanied by a Commentary article, which provides an authoritative, concise, and accessible point of reference for the most important modes of atmospheric variability.

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