4/10/2013

New Papers (Nature, Science & PNAS) as of April 2nd


New Papers & Articles Published from 03/24/2013 to 04/01/2013

Nature (News) Volume 495 (03/26/2013)
(1)  Planck snaps infant universe
*A treasure map, high precision map of the cosmic microwave background, is now available for astronomers! This map shows that the universe is expanding slower than previously thought.
(2)  Private research ship makes waves
*Previously I read the article about the U.S. government cutting funding for research, but the arrival of a privately owned research ship might save this pessimistic situation.
Nature (News&Views)
(3) Paleontology: Tubular worms from Burgess Shale doi:10.1038/nature11963
*Refer to (6)

Nature (Letters)
(4) Deglacial pulses of deep ocean silicate into the subtropical North Atlantic Ocean
doi:10.1038/nature12006
*The record of biogenic opal export from a coastal upwelling system off the coast of northwest Africa showed a high peak during each glacial termination. This suggested lower CO2 during ice age could be due to the enhanced storage in the Southern Ocean.
(5) Electrical image of passive mantle upwelling beneath the northern East Pacific Rise
doi:10.1038/nature11932
*Mantle electrical structure was visualized by sea-floor magnetotelluric soundings at the fast-spreading northern East Pacific Rise. This image supported that plate driven passive upwelling dominates the ridge segment.
(6) Tubicolous enteropneusts from the Cambrian period doi:10.1038/nature12017
*Partobranchus tenuis from the Middle Cambrian-period (Series 3, Stage 5) Burgess Shale was analyzed, and the result suggested that this is the precursor of the pterobranch periderm (翼鰓網) 


Science (News Focus)Volume 339 (03/29/2013)
(7) As threats to corals grow, hints of resilience emerge
doi: 10.1126/science.339.6127.1517
*Corals seem to be stronger than previously thought. Heat resistant genes and the new sea life that can eat up algae around corals are discussed.
Science (Perspectives)
(8) Fungal carbon sequestration doi: 10.1126/science.1236338 *Refer to (10)
Science (Letters)
(9) Direct observations of the evolution of polar cap ionization patches
doi: 10.1126/science.1231487
*The formation and evolution of patches of ionization in the polar ionosphere (電離層) were analyzed from geomagnetic storm observations.
(10) Roots and associated fungi drive long-term carbon sequestration in boreal forest doi: 10.1126/science.1231923
*14C bomb-carbon model showed 50 to 70% of stored carbon is from roots and root-associated microorganisms.

PNAS Volume 110 (03/26/2013)
(11) New Trans-Arctic shipping routes navigable by midcentury doi:10.1073/pnas.1214212110
*New trans-Arctic shipping routes linking the Atlantic and Pacific Oceans were studied. The marine transportation models show that changes in sea ice conditions enable vessels to take new routes by mid century.
(12) 147Sm-143Nd systematics of Earth are inconsistent with a superchondritic Sm/Nd ratio
doi:10.1073/pnas.1222252110
*Bulk silicate earth might have higher Sm/Nd than chondrites. This result challenges the general assumptions: earth composition is similar to chondritic propositions.
(13)Link between the double-Intertropical Convergence Zone problem and cloud biases over the Southern Ocean 

doi:10.1073/pnas.1213302110
*The double ITCZ problems in GCM models can be due to the higher energy flux into the southern hemisphere atmosphere.