When NASA’s Aqua satellite passed over Yagi on June 11 it was a tropical storm with strong thunderstorms on its eastern side. An infrared image of the storm was taken from the Atmospheric Infrared Sounder (AIRS) instrument aboard NASA’s Aqua satellite on June 11 at 12:05 a.m. EDT. The areas with the coldest cloud top temperatures and strongest thunderstorms were near -63F/-52C around the center and indicative of heavy rainfall.
This infrared image of Tropical Depression Yagi was taken from the AIRS instrument aboard NASA’s Aqua satellite on June 11 at 12:05 a.m. EDT. The areas with the coldest cloud top temperatures and strongest thunderstorms (purple) were near -63F/-52C around the center and eastern quadrant of the storm. Those very cold cloud temperatures are indicative of heavy rainfall. Credit: NASA JPL/Ed Olsen
Since June 11, an upper-level low pressure area from the north of Yagi has moved closer to the storm’s center, suppressing thunderstorm development. Animated infrared satellite imagery showed that the storm’s low-level center is now fully exposed to outside winds and has elongated. Whenever a storm loses its circulation and becomes elongated it weakens (like a tire going flat that can’t spin properly). There is no recognizable convection (rising air that forms thunderstorms that make up the tropical cyclone) around the storm’s center.
In addition to the upper-level low squelching the storm, Yagi has moved into cooler waters that do not support maintaining a tropical cyclone. Sea surface temperatures of at least 80F (26.6 C) are needed to keep a tropical cyclone going. The sea surface temperatures around Yagi are as cool as 223 Celsius, too cool to maintain the storm.
On June 12 at 1500 UTC (11 a.m. EDT) Tropical depression Yagi was spinning down in the northwestern Pacific Ocean. Yagi’s maximum sustained winds were down to 30 knots. It was centered near 31.2 north latitude and 138.9 east longitude, about 250 miles south of Yokosuka, Japan. Yagi is moving to the east-northeast at 8 knots.
According to the Joint Typhoon Warning Center (JTWC), the organization that forecasts storms in the northwestern Pacific, Yagi was still a “weakly symmetric warm-core system,” but it is expected to become a cold-core low pressure area by the end of June 12. JTWC forecasters expect Yagi to dissipate by June 13.Text credit: Rob Gutro
Rob Gutro | EurekAlert!
In times of climate change: What a lake’s colour can tell about its condition
21.09.2017 | Leibniz-Institut für Gewässerökologie und Binnenfischerei (IGB)
Did marine sponges trigger the ‘Cambrian explosion’ through ‘ecosystem engineering’?
21.09.2017 | Helmholtz-Zentrum Potsdam - Deutsches GeoForschungsZentrum GFZ
Plants and algae use the enzyme Rubisco to fix carbon dioxide, removing it from the atmosphere and converting it into biomass. Algae have figured out a way to increase the efficiency of carbon fixation. They gather most of their Rubisco into a ball-shaped microcompartment called the pyrenoid, which they flood with a high local concentration of carbon dioxide. A team of scientists at Princeton University, the Carnegie Institution for Science, Stanford University and the Max Plank Institute of Biochemistry have unravelled the mysteries of how the pyrenoid is assembled. These insights can help to engineer crops that remove more carbon dioxide from the atmosphere while producing more food.
A warming planet
Our brains house extremely complex neuronal circuits, whose detailed structures are still largely unknown. This is especially true for the so-called cerebral cortex of mammals, where among other things vision, thoughts or spatial orientation are being computed. Here the rules by which nerve cells are connected to each other are only partly understood. A team of scientists around Moritz Helmstaedter at the Frankfiurt Max Planck Institute for Brain Research and Helene Schmidt (Humboldt University in Berlin) have now discovered a surprisingly precise nerve cell connectivity pattern in the part of the cerebral cortex that is responsible for orienting the individual animal or human in space.
The researchers report online in Nature (Schmidt et al., 2017. Axonal synapse sorting in medial entorhinal cortex, DOI: 10.1038/nature24005) that synapses in...
Whispering gallery mode (WGM) resonators are used to make tiny micro-lasers, sensors, switches, routers and other devices. These tiny structures rely on a...
Using ultrafast flashes of laser and x-ray radiation, scientists at the Max Planck Institute of Quantum Optics (Garching, Germany) took snapshots of the briefest electron motion inside a solid material to date. The electron motion lasted only 750 billionths of the billionth of a second before it fainted, setting a new record of human capability to capture ultrafast processes inside solids!
When x-rays shine onto solid materials or large molecules, an electron is pushed away from its original place near the nucleus of the atom, leaving a hole...
For the first time, physicists have successfully imaged spiral magnetic ordering in a multiferroic material. These materials are considered highly promising candidates for future data storage media. The researchers were able to prove their findings using unique quantum sensors that were developed at Basel University and that can analyze electromagnetic fields on the nanometer scale. The results – obtained by scientists from the University of Basel’s Department of Physics, the Swiss Nanoscience Institute, the University of Montpellier and several laboratories from University Paris-Saclay – were recently published in the journal Nature.
Multiferroics are materials that simultaneously react to electric and magnetic fields. These two properties are rarely found together, and their combined...
19.09.2017 | Event News
12.09.2017 | Event News
06.09.2017 | Event News
22.09.2017 | Life Sciences
22.09.2017 | Medical Engineering
22.09.2017 | Physics and Astronomy