NASA : Lights in the Darkness .- Luces en la oscuridad............

https://www.nasa.gov/image-feature/lights-in-the-darkness

Just hours after the winter solstice, a mass of energetic particles from the Sun smashed into the magnetic field around Earth. The strong solar wind stream stirred up a display of northern lights over northern Canada.

 

With the “day-night band” (DNB) of the Visible Infrared Imaging Radiometer Suite (VIIRS), the Suomi NPP satellite acquired this view of the aurora borealis on Dec. 22, 2016. The northern lights stretched across British Columbia, Alberta, Saskatchewan, Manitoba, Nunavut, and Northwest Territories, areas that often fall under the auroral oval.

The DNB detects dim light signals such as auroras, airglow, gas flares, and reflected moonlight. In the case of the image above, the sensor detected the visible light emissions as energetic particles rained down from Earth’s magnetosphere and into the gases of the upper atmosphere.

The collision of solar particles and pressure into our planet’s magnetosphere accelerates particles trapped in the space around Earth (such as in the radiation belts). Those particles are sent crashing down into Earth’s upper atmosphere—at altitudes of 100 to 400 kilometers (60 to 250 miles)—where they excite oxygen and nitrogen molecules and release photons of light. The results are rays, sheets, and curtains of dancing light in the sky.

Suomi NPP is the result of a partnership between NASA, the National Oceanic and Atmospheric Administration, and the Department of Defense.

Annotated image: NASA's Earth Observatory

Image Credit: NASA Earth Observatory image by Jesse Allen, using VIIRS day-night band data from the Suomi National Polar-orbiting Partnership
Caption: Mike Carlowicz

Last Updated: Dec. 27, 2016

Editor: Sarah Loff

Tags:  Earth, Image of the Day, Suomi NPP (National Polar-orbiting Partnership),

NASA
Guillermo Gonzalo Sánchez Achutegui
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NASA : 97B - North Indian Ocean .-

Hola amigos:  A VUELO DE UN QUINDE EL BLOG., Durante la semana pasada extrema precipitaciones a partir de dos móviles áreas de baja presión tropicales lentas causado graves inundaciones en el sureste de la India. Uno de los puntos bajos, designado Sistema 97B continuaron persistir a lo largo de la costa sudeste de la India el 17 de noviembre como el sistema 97B y otra área de baja presión se redujo fuertes lluvias, la NASA y socios en todo el mundo se reunieron datos utilizando una serie de satélites.
Las inundaciones han causado tantos como 70 muertes. La ciudad de Chennai, en el estado de Tamil Nadu fueron golpeados excepcionalmente duro, como se informó de 59 personas asesinadas allí.

More information....

http://www.nasa.gov/feature/goddard/97b-north-indian-ocean

NASA Measures India's Deadly Flooding Rains

During the past week extreme rainfall from two slow moving tropical low pressure areas caused severe flooding in southeastern India. One of the lows, designated System 97B continued to linger along the southeastern Indian coast on November 17. As System 97B and another low pressure area dropped heavy rainfall, NASA and partners around the world gathered data using an array of satellites.

The flooding has caused as many as 70 reported deaths. The city of Chennai in the state of Tamil Nadu were hit exceptionally hard, as 59 people were reported killed there.

 

An analysis of rainfall data from November 9 to 16, 2015 showed up to 550 mm (21.7 inches) of rain drenched India's southeastern coast in the state of Tamil Nadu. Over 200 mm (7.9 inches) fell in large areas of southeastern India and northern Sri Lanka.

Credits: NASA/JAXA/Hal Pierce

NASA's Integrated Multi-satellite Retrievals for GPM (IMERG) combines all data from 12 satellites into a global map of rainfall at half hourly intervals. The rainfall accumulation analysis above was computed from data generated by IMERG during the past week from November 9 to 16, 2015. An analysis of those data indicates that during the past week up to 550 mm (21.7 inches) of rain drenched India's southeastern coast in the state of Tamil Nadu. Rainfall totals of over 200 mm (7.9 inches) were measured in large areas of southeastern India and northern Sri Lanka.

On Nov. 17 at 7:32 UTC (2:32 a.m. EST) the Visible Infrared Imaging Radiometer Suite (VIIRS) instrument aboard NASA-NOAA's Suomi NPP satellite captured a visible image of System 97B hugging the Indian coast.

Credits: NASA/NOAA/NRL

The Integrated Multi-satellitE Retrievals for GPM (IMERG) creates a merged precipitation product from the GPM constellation of satellites. These satellites include: DMSP (Defense Mapping Satellite Program) satellites from the U.S. Department of Defense, GCOM-W from the Japan Aerospace Exploration Agency (JAXA), Megha-Tropiques from the Centre National D’etudies Spatiales (CNES) and Indian Space Research Organization (ISRO), NOAA series from the National Oceanic and Atmospheric Administration (NOAA), Suomi-NPP from NOAA-NASA, and MetOps from the European Organisation for the Exploitation of Meteorological Satellites (EUMETSAT).  All of the instruments (radiometers) onboard the constellation partners are inter-calibrated with information from the GPM Core Observatory’s GPM Microwave Imager (GMI) and Dual-frequency Precipitation Radar (DPR). 

On November 16 at 1800 UTC (1 p.m. EST) System 97B was located just 55 nautical miles east of Chennai, India. It was centered near 13.2 degrees north latitude and 81.1 degrees east longitude. 

On Nov. 17 at 7:32 UTC (2:32 a.m. EST) the Visible Infrared Imaging Radiometer Suite (VIIRS) instrument aboard NASA-NOAA's Suomi NPP satellite captured a visible image of System 97B. The storm stretched over southwestern Bay of Bengal near and the northern coast of Tamil Nadu and southern Andhra Pradesh coast. The VIIRS image showed bands of thunderstorms wrapping from the northern quadrant into the southwestern quadrant. The Joint Typhoon Warning Center noted that computer models show that System 97B is expected to move in a northerly direction. Maximum sustained winds are estimated between 20 and 25 knots (23 to 28.7 mph/37 to 46.3 kph), and System 97B has a minimum central pressure near 1004 millibars.

The low pressure area continued to generate heavy rain in Tamil Nadu and at isolated places over south coastal Andhra Pradesh. For forecasts and updates from the Indian Meteorological Department, visit: http://www.imd.gov.in.

For more about NASA's Precipitation Measurement Missions, visit:

http://pmm.nasa.gov

Harold F. Pierce / Rob Gutro
SSAI/NASA's Goddard Space Flight Center

Last Updated: Nov. 17, 2015

Editor: Lynn Jenner

Tags:  GPM (Global Precipitation Measurement), Hazards, Hurricanes, Suomi NPP (National Polar-orbiting Partnership),

NASA

Guillermo Gonzalo Sánchez Achutegui

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NASA : Colors After the Storms .- Colores después de las tormentas

Hola amigos: A VUELO DE UN QUINDE EL BLOG., Las fuertes lluvias perjudiciales cayeron en Carolina del Sur, en el sureste de Estados Unidos a principios de octubre de 2015. Gran parte de esa agua tenía, a mediados de octubre, fluyeron en el Océano Atlántico trayendo consigo pesadas cargas de sedimentos, nutrientes y materia orgánica disuelta. La imagen de arriba, desde el Visible Infrared Imaging Radiometer Suite (VIIRS) instrumento en el satélite Suomi NPP de la NASA-NOAA, muestra la segunda vuelta, ya que interactúa con las corrientes oceánicas en 15 de octubre

Suomi NPP, lanzado el 28 de octubre de 2011, representa un primer paso fundamental en la construcción del sistema de la Tierra por satélite de observación de la próxima generación que recogerá datos sobre el cambio climático a largo plazo y las condiciones meteorológicas a corto plazo. Suomi NPP lanzado con cinco instrumentos clave, incluyendo VIIRS, un radiómetro de exploración que recoge imágenes visibles e infrarrojas y las mediciones radiométricas de la tierra, la atmósfera, la criosfera y océanos. Datos VIIRS se utiliza para medir las nubes y aerosoles propiedades, color del océano, del mar y de la temperatura de la superficie terrestre, movimiento del hielo y de la temperatura, los incendios y el albedo de la Tierra. Los climatólogos utilizan datos VIIRS para mejorar nuestra comprensión del cambio climático global.

More information............

http://www.nasa.gov/image-feature/colors-after-the-storms

Damaging heavy rains fell on South Carolina in the southeastern United States at the beginning of October 2015. Much of that water had, by mid-October, flowed into the Atlantic Ocean bringing with it heavy loads of sediment, nutrients, and dissolved organic material. The above image, from the Visible Infrared Imaging Radiometer Suite (VIIRS) instrument on NASA-NOAA's Suomi NPP satellite, shows the runoff as it interacts with ocean currents on Oct. 15.

 

Suomi NPP, launched on Oct. 28, 2011, represents a critical first step in building the next-generation Earth-observing satellite system that will collect data on long-term climate change and short-term weather conditions. Suomi NPP launched with five key instruments, including VIIRS, a scanning radiometer which collects visible and infrared imagery and radiometric measurements of the land, atmosphere, cryosphere, and oceans. VIIRS data is used to measure cloud and aerosol properties, ocean color, sea and land surface temperature, ice motion and temperature, fires, and Earth's albedo. Climatologists use VIIRS data to improve our understanding of global climate change.

Image Credit: NASA/Goddard/SuomiNPP/VIIRS via NASA's OceanColor

Last Updated: Oct. 28, 2015

Editor: Sarah Loff

Tags:  Earth, Hazards, Hurricanes, Image of the Day, Suomi NPP (National Polar-orbiting Partnership),

NASA
Guillermo Gonzalo Sánchez Achutegui
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NASA : Lighting the Paths Across the U.S.

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Lighting the Paths Across the U.S.

Thanksgiving is a time for family, for feasting, and for gratitude in the United States. It is also a time when the nation’s transportation network is clogged with travelers. According to the American Automobile Association, an estimated 43.4 million Americans will travel 50 miles (80 kilometers) or more during Thanksgiving week, with the average round trip being 600 miles (1,000 kilometers). More than 90 percent of them will use cars or trucks, while the rest will ride planes or trains.

The United States has more roads—4.1 million miles (6.6 million kilometers)—than any other nation in the world, and roughly 40 percent more than second-ranked India. About 47,000 of those U.S. miles are part of the Interstate Highway System, established by President Dwight Eisenhower in the 1950s. The country also has 127,000 miles (204,000 kilometers) of railroad tracks and about 25,000 miles (40,000 kilometers) of navigable rivers and canals (not including the Great Lakes).

The imprint of that transportation web becomes easier to see at night. The Visible Infrared Imaging Radiometer Suite (VIIRS) on the Suomi NPP (National Polar-orbiting Partnership) satellite acquired two nighttime images early on Oct. 1, 2013, for this natural-light, mosaic view of the continental United States. The VIIRS instrument uses a “day-night band” of wavelengths that is sensitive to low light levels and manmade light sources. The images were collected just three days before the new moon, so reflected light from space and the atmosphere was relatively low. It was also a rare night when most of the nation was cloud-free.

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Image Credit: NASA Earth Observatory image by Jesse Allen and Robert Simmon, using Suomi NPP VIIRS and DMSP OLS data provided courtesy of Chris Elvidge (NOAA National Geophysical Data Center)
Caption: Mike Carlowicz

NASA
Guillermo Gonzalo Sánchez Achutegui
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NASA - Calm Skies Over Three Oceans

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Calm Skies Over Three Oceans

We live on a dynamic, restless planet. On any given day, there is usually a cyclone, tropical depression, or extra-tropical storm brewing somewhere on the Earth. But for a brief moment this week, the skies over all of the oceans were relatively calm.
The image above is a composite of fourteen polar satellite passes, or swaths, stitched together from September 8, 2013. The natural-color images were acquired by the Visible Infrared Imaging Radiometer Suite (VIIRS) on the Suomi National Polar-orbiting Partnership (Suomi NPP) satellite.
At the time of those near-midday passes, there were no hurricanes, cyclones, or tropical storms in the Atlantic, Pacific, or Indian Ocean basins—a relatively rare occurrence at the height of the hurricane/cyclone season in the northern hemisphere. There was plenty of cloud cover, of course, and smaller storm systems. In the eastern Pacific, remnants of tropical storm Lorena were breaking up near the Baja Peninsula. In the eastern Atlantic, the pieces of tropical depression #9 were starting to gather near the islands of Cape Verde; by the next day, tropical storm Humberto would form.
In its May and August 2013 outlooks, the National Hurricane Center forecasted a 70 percent chance of a “more active than normal” season, with 13 to 20 named storms and 7 to 11 hurricanes. A “normal” season typically produces 12 named storms, including 6 hurricanes. Through the second week of September (the midpoint of the Atlantic hurricane season), there have been nine named storms—keeping pace with predictions—but just one that reached hurricane strength.
The one hurricane, Humberto, was observed on September 11, 2013, by the Moderate Resolution Imaging Spectroradiometer (MODIS) on NASA’s Terra satellite. Humberto became a hurricane around 5 a.m. on September 11, just hours short of becoming the latest date for the first hurricane in a season. By September 13, Humberto had weakened to a tropical storm. Forecasts were calling for the northwest-moving storm to reach hurricane status again by September 19, when it will be in the middle of the Atlantic Ocean and well away from land.The slow start does not necessarily mean the hurricane season will be mild. “What happens in the early part of the season is generally not a good predictor of the second half of the season, which is when the majority of hurricanes and major hurricanes form,” said Gerry Bell, lead seasonal hurricane forecaster for the National Oceanic and Atmospheric Administration. “NOAA’s outlooks are for the season as a whole, and not for any particular month during the season.”
In the period from 1981 to 2010, the Atlantic basin has averaged six hurricanes per year, and 61 percent of all Atlantic named storms form from September through November. “The 2013 hurricane season was billed as a stud, but up through mid-September, it has been a dud,” said Bill Patzert, climatologist at NASA’s Jet Propulsion Laboratory. “Stay vigilant, though. Hurricanes could be late and active. Remember hurricane Sandy in late October last year.”
Image Credit: NASA Earth Observatory image by Jesse Allen, using VIIRS data from the Suomi National Polar-orbiting Partnership. Suomi NPP is the result of a partnership between NASA, the National Oceanic and Atmospheric Administration, and the Department of Defense.
Caption Credit: Michael Carlowicz.
Instrument: Suomi NPP - VIIRS

NASA

Guillermo Gonzalo Sánchez Achutegui

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