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Scientists study the evolution of Saturns great storm of 20102011Scientists study the evolution of Saturns great storm of 20102011

first_img Image: The eye of Saturn’s storm Citation: Scientists study the evolution of Saturn’s great storm of 2010-2011 (2016, August 5) retrieved 18 August 2019 from https://phys.org/news/2016-08-scientists-evolution-saturn-great-storm.html More information: — Kunio M. Sayanagi et al. Dynamics of Saturn’s great storm of 2010–2011 from Cassini ISS and RPWS, Icarus (2013). DOI: 10.1016/j.icarus.2012.12.013— Dynamics of Saturn’s great storm of 2010-2011 from Cassini ISS and RPWS, arXiv:1607.07246 [astro-ph.EP] arxiv.org/abs/1607.07246AbstractSaturn’s quasi-periodic planet-encircling storms are the largest convecting outbursts in the Solar System. The last eruption was in 1990. A new eruption started in December 2010 and presented the first-ever opportunity to observe such episodic storms from a spacecraft in orbit around Saturn. Here, we analyze images acquired with the Cassini Imaging Science Subsystem (ISS), which captured the storm’s birth, evolution and demise. In studying the end of the convective activity, we also analyze the Saturn Electrostatic Discharge (SED) signals detected by the Radio and Plasma Wave Science (RPWS) instrument. Explore further This series of images from NASA’s Cassini spacecraft orbiting Saturn shows the evolution of a great storm of 2010-2011. Credit: NASA/JPL-Caltech/SSI Saturn experiences quasi-periodic planet-encircling storms. The latest significant, well-observed storm started on Dec. 5, 2010 and lasted until the end of 2011. Events like storms can be identified visually and through radio noise; thus, instruments onboard Cassini such as the Cassini Imaging Science Subsystem (ISS) and the Radio and Plasma Wave Science (RPWS), allowed scientists to obtain high-precision measurements of these violent outbursts in the planet’s atmosphere.Recently, a team of researchers led by Kunio Sayanagi of Hampton University in Virginia, analyzed the data provided by ISS and RPWS to study the storm’s birth, evolution, and demise. ISS obtained wide-angle pictures of the storm with a resolution of 60 to 120 km per pixel to study the vertical cloud structure. The instrument also allowed the team to measure cloud motions in order to reveal the atmospheric dynamics of the storm region. RPWS provided crucial information about the configuration of Saturn’s magnetic field, ionosphere, plasma, and lightning from the planet’s atmosphere.”We analyze Cassini ISS images and RPWS data to investigate the temporal evolution of the 2010-2011 planet-encircling storm. (…) Our study analyzes images acquired using the wide-angle camera’s CB2 (750 nm), MT2 (727 nm), and MT3 (889 nm) filters to study the vertical cloud structure. (…) We also present analysis of RPWS data that shows near-simultaneous coverage of the end of the convecting phase of the storm,” the scientists wrote in the paper.According to the research, the storm erupted out of a previously known feature called the String of Pearls (SoPs)—a chain of about 26 cyclones located at 33° N planetocentric latitude. Afterwards, the outburst grew and engulfed the entire latitude zone. The scientists noted that on January 11, 2011, the dimensions of the storm’s “head” were 9,200 km and up to 34,000 km in the north-south and east-west dimensions, respectively. They also emphasized that this storm spawned the largest tropospheric vortex ever seen on Saturn.”On January 11, 2011, the anticyclone was sized 11,000 km by 12,000 km in the north-south and east-west directions, respectively. (…) With the east-west diameter of 12,000 km, the new anticyclonic vortex became greater in size than any tropospheric vortex previously seen on Saturn. The rapid growth and shrinkage of the new anticyclone is in stark contrast to the steadiness of anticyclonic vortices on Jupiter,” the paper reads.The study notes major changes in the storm dynamics after June 20, 2011 when the storm’s head collided with the anticyclone after the anticyclone’s longitude trailed 360° longitude behind the core. After this collision, the storm’s convective activity displayed a major decline. However, the storm left the region between 25°N and 40°N in a highly disturbed state. According to the paper, these atmospheric events also altered the zonal mean wind profile of the storm latitudes.The researchers expect that the storm of 2010-2011 will have lasting effects on Saturn’s northern hemisphere.”The aftermath of the latest storm should have an effect that may last for up to a decade, and a continuing monitoring of Saturn from the orbiting vantage point of Cassini spacecraft should reveal further details of the dynamic event,” the scientists concluded.center_img © 2016 Phys.org (Phys.org)—The NASA/ESA Cassini spacecraft has made plenty of groundbreaking discoveries, outstandingly improving our knowledge of Saturn and its moons, including our understanding of violent processes in the atmosphere of our solar system’s second-largest planet. Now, a new research paper published July 26 on arXiv.org, which details the dynamics and evolution of Saturn’s great storm of 2010-2011, marks another important study based on the data provided by Cassini’s scientific instruments. Journal information: Icarus This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no part may be reproduced without the written permission. The content is provided for information purposes only.last_img read more

Sense and sensualitySense and sensuality

first_imgA sultry evening in Delhi was proof. Shiro at Samrat Hotel opened its doors for intellectuals, book lovers and friends as the black and red interiors played host to Sreemoye Piu Kundu’s book Sita’s Curse (Hachette, Rs 350) launch in the Capital. Apsara Reddy, actor Adil Hussain and  Mahabanoo Mody-Kotwal (of the Vagina Monologues fame) along with Kundu opened the evening with discussions about sex, sexuality and desire before they read parts of the novel and engaged in some very riveting conversations with the packed house. Also Read – ‘Playing Jojo was emotionally exhausting’Sita’s Curse tells the story of Meera who, after the death of her twin brother and a rather unhappy marriage, manages to find desire her way. What ties you down to the novel is the vivid imagery and the stunning words Kundu uses to express Meera’s wants. Wants and needs are a world apart and in the domain of desire, the former rules supreme. Kundu revealed that she crafted Meera along the lines of this beautiful, sensuous woman she used to see in a chawl in Mumbai, everyday, on her way to office. Mumbai floods hit and Kundu never saw Meera again, but Meera’s sad melancholic eyes plagued her and eventually came Sita’s Curse. Also Read – Leslie doing new comedy special with NetflixThe panelists discussed at length that in India, desire and women were divorced concepts and how more often than not, a woman loses her sexuality once she is married. A married woman ends up prioritising her husband, in-laws, kids and her house over herself and somewhere a beautiful woman just vanishes into nothing. Sita’s Curse is a rescue from that. Kundu, without a doubt, is the first of the gutsy breed of writers I spoke of in the beginning. Her language of desire started with Faraway Music and has gained a more sensual font in Sita’s Curse. Published by Hachette this book is now in its second print run and roaring ahead. The country does not have much erotic English literature to talk of and most books, if they exist and written in rather distasteful prose – we could well call Sita’s Curse a first for many other reasons including the genre it carves out for itself. The enthusiastic audience agreed whole heartedly with the discussions about women setting their minds on the path to find desire and accept that all of them deserve to be desired. A Meera in all of us. Pick up the book, you won’t regret it.last_img read more

Maneka asks MHA to consider womens quota in policeManeka asks MHA to consider womens quota in police

first_imgThe women and child development ministry has requested the home ministry to take up with the various state governments the issue of 33 percent reservation of posts for women in police forces, official sources said on Sunday.In a letter to Home Minister Rajnath Singh, Women and Child Development Minister Maneka Gandhi was cited to have said: “I request you to take up the issue of 33% reservation for women in police forces at your level so that together we can address the problem of violence against women.”last_img read more

Salute to the Little Brave HeartsSalute to the Little Brave Hearts

first_imgSelected for the National Bravery Award, 25 children from different parts of the country were hosted to a mesmerizing Sound and Light show run by India Tourism Development Corporation (ITDC) Ltd at Purana Qila, New Delhi. The kids who will receive the National Bravery awards for their outstanding acts of gallantry, by Prime Minister Narendra Modi on the Republic Day were invited to showcase the incredible 1000 years journey of rise, fall and shaping of the Capital city through a spectacular Sound & Light show Ishq-e-Dilli operated by ITDC. Also Read – Add new books to your shelfAnil Kumar Gupta, General Manager, Sound and Light Show Division, ITDC said, “It is irresistible to see the courage and bravery these kids have portrayed, fighting their fears to protect other life’s and some of them lost their life to save others. These kids are true role models who inspire others; it was an honor to host, meet and interact with these brave souls at the Son Et Lumiere (Show)”.This year, the Indian Council for child Welfare has selected 25 children for National Bravery Awards. Out of 25, four of the awards are posthumous. These children hailing from different geographical regions will receive the award from Prime Minister on Republic Day and will also be a part of the Republic Day Parade. In addition to this, India Tourism Development Corporation has also hosted corresponding Sound & Light show at Red fort & Purana Qila for more than 1300 NCC Cadets as per organisation announcement to offer free shows for the armed forces and their families. Also Read – Over 2 hours screen time daily will make your kids impulsiveThe sound and light show, Ishq-e-Dilli which is organised for the brave kids is more than just a sound and light show. It’s a hi-tech multimedia show that utilizes cutting edge technology. It is India’s first permanent projection art installation. Combined with Delhi’s vibrant past, the entire journey evokes the mood of each historic moment most palpably which promises to be a memorable experience for the viewers.Ishq-e-Dilli depicts the spirit of Delhi through the history of its ten cities from the period of Prithvi Raj Chauhan to the modern Delhi which now runs on metro. The well- structured evening sound and light Show at Purana Qila is a fascinating attraction for the visitors to Delhi, with its rocky walls provided with a vigorous backdrop for the light effects.last_img read more

Laptops That LastLaptops That Last

first_imgJune 7, 2011 2.Toshiba Portégé R830Starting Price: $889Toshiba gets credit in the larger PC market for being an early mover into rugged notebook computers. Its latest effort, the Portégé R830, is jammed with features like a 13.3-inch backlit LED display, a built-in DVD drive, 4 GB RAM and support for everything from an entry-level Intel Core i3 processor to a super-fast i7 chip.But for the money, the i5 model, starting at $1,350, is probably the sweet spot for most small firms. The entire unit is wrapped in a single-piece magnesium alloy case, supported with the latest riff of USB and Bluetooth connectivity. Entrepreneurs can expect most every small-business task–from word processing to advanced business graphics to spreadsheets–to run very well on the R830. The kicker: This bad boy is a feather-light 3.2 pounds. At about an inch thick, that makes the R830 a legitimate ultraportable laptop that can double as a desktop replacement. On bulk-to-performance ratio, it’s tough to beat this box. Free Workshop | August 28: Get Better Engagement and Build Trust With Customers Now 3. Dell Latitude E5420Starting Price: $889Looking for a highly durable, long lasting, metal-enclosed PC on the cheap? The newly redesigned Latitude E5420, a well-provisioned midline unit with an i3 Dual Core Processor, 2 GB RAM, 250 GB of storage, six-cell battery and a backlit keyboard is a heck of a buy. It’s wrapped in a sleek anodized brushed aluminum display back, has reinforced steel hinges, a magnesium internal frame and zinc alloy latches. It’s also sealed in a bumper casing and has a spill-resistant keyboard.It should be noted that the E5420 isn’t up to über-computing, design work or heavy calcs, but for basic business computing, it’s a box worth considering. This hands-on workshop will give you the tools to authentically connect with an increasingly skeptical online audience. You drag your laptop with you everywhere you go, because you rely on it to run your business. You need something that can hold up to all that wear and tear–but you don’t want to break the bank. Thankfully, major laptop makers are finally taking durability seriously when it comes to designing their notebook computers. Features that were once considered high-end, like all-metal casings, state-of-the-art processors and instant web access, have become commonplace. With so many options available, picking the right portable computer for your business isn’t easy. For laptops that are built to last, here’s our guide to four of the best.1. 15-inch Apple MacBook ProStarting Price: $1,800The construction standards pioneered by the Apple MacBook Pro line of notebooks are superior to anything else on the market today. Single-unit, molded aluminum cases and keyboards (which are just now coming to other brands) have been standard in MacBook Pros for years. The trick with Apple is picking which über-box is best for your small business. For now, your best bet may be the recently updated 15-inch, 2 Ghz, 4 GB, 500 GB spinning-hard-drive model.Sure, the 13-incher is attractively priced at $1,200, and the 17-inch model is a dazzling performer, but the smaller unit is just that–small. The 15-incher has all the features you need: a ridiculously fast quad i7 processor, seven hours of battery life, a slick backlit keyboard and trackpad and a handy MagSafe power adapter that simply disconnects if you (or the dog) trip over the power cord.center_img 4. HP Pavilion dv6t Quad EditionStarting Price: $1,000Though not nearly as tough as others on our list, the HP Pavilion dv6t makes the cut based on its raw computational power, for a price even a cheapskate will love. Its “metal” enclosure is merely a finish treatment, but this $1,000 box offers a legit second-generation Intel Core i7, 6 GB RAM, 750 GB of storage, a good-looking 15.6-inch diagonal high-def LED display and one of our favorite keyboards in the mobile market. The fingerprint reader and USB 3.0 support are also appealing. This story appears in the June 2011 issue of . Subscribe » 4 min read Enroll Now for Freelast_img read more