NASA : Smoke From Canadian Wildfires Trapped in Clouds .- El humo de los incendios forestales canadienses atrapados en las nubes

Hola amigos:  A VUELO DE UN QUINDE EL BLOG., la Agencia Espacial NASA, nos hace llegar la información de la gravedad de los incendios que están sucediendo en Canadá, y son tan intensos que el humo se encuentra atrapado entre las nubes.

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http://www.nasa.gov/image-feature/goddard/2016/smoke-from-canadian-wildfires-trapped-in-clouds

NASA's Aqua satellite captured this image of the clouds over Canada.  Entwined within the clouds is the smoke billowing up from the wildfires that are currently burning across a large expanse of the country.  The smoke has become entrained within the clouds causing it to twist within the circular motion of the clouds and wind.  This image was taken by the Moderate Resolution Imaging Spectroradiometer (MODIS) instrument on the Aqua satellite on May 9, 2016. 

Image Credit: NASA image courtesy Jeff Schmaltz LANCE/EOSDIS MODIS Rapid Response Team, GSFC
Caption: Lynn Jenner

Last Updated: May 10, 2016

Editor: Lynn Jenner

Tags:  Aqua Satellite, Fire and Smoke, Hazards, Image of the Day,

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NASA : Cloudy Earth .- Tierra Nublada

Hola amigos: A VUELO DE UN QUINDE EL BLOG., hemos recibido información de la Agencia Espacial NASA, sobre que nuestra La Tierra, está nublado en algunas veces hasta en un 67% de la superficie total. Estas investigaciones han sido posible gracias a the Moderate Resolution Imaging Spectroradiometer (MODIS) y NASA's Aqua satellite.

NASA, nos detalla : Décadas de observaciones satelitales y fotografías de astronautas;  muestran que las nubes dominan vistas basadas en el espacio de la Tierra. Un estudio basado en casi una década de datos de satélite estima que alrededor del 67 por ciento de la superficie de la Tierra está normalmente cubierto por nubes. Este es especialmente el caso durante los océanos, donde otra investigación muestra menos del 10 por ciento del cielo está completamente despejado de nubes en un momento dado. Sobre la tierra, 30 por ciento de los cielos están completamente libre de nubes.

Decades of satellite observations and astronaut photographs show that clouds dominate space-based views of Earth. One study based on nearly a decade of satellite data estimated that about 67 percent of Earth’s surface is typically covered by clouds. This is especially the case over the oceans, where other research shows less than 10 percent of the sky is completely clear of clouds at any one time. Over land, 30 percent of skies are completely cloud free.

Earth’s cloudy nature is unmistakable in this global cloud fraction map, based on data collected by the Moderate Resolution Imaging Spectroradiometer (MODIS) on NASA's Aqua satellite. While MODIS collects enough data to make a new global map of cloudiness every day, this version of the map shows an average of all of the satellite’s cloud observations between July 2002 and April 2015. Colors range from dark blue (no clouds) to light blue (some clouds) to white (frequent clouds).

There are three broad bands where Earth’s skies are most likely to be cloudy: a narrow strip near the equator and two wider strips in the mid-latitudes. The band near the equator is a function of the large scale circulation patterns—or Hadley cells—present in the tropics. Hadley cells are defined by cool air sinking near the 30 degree latitude line north and south of the equator and warm air rising near the equator where winds from separate Hadley cells converge. (The diagram here illustrates where Hadley cells are located and how they behave.) As warm, moist air converges at lower altitudes near the equator, it rises and cools and therefore can hold less moisture. This causes water vapor to condense into cloud particles and produces a dependable band of thunderstorms in an area known as the Inter Tropical Convergence Zone (ITCZ).

Clouds also tend to form in abundance in the middle latitudes 60 degrees north and south of the equator. This is where the edges of polar and mid-latitude (or Ferrel) circulation cells collide and push air upward, fueling the formation of the large-scale frontal systems that dominate weather patterns in the mid-latitudes. While clouds tend to form where air rises as part of atmospheric circulation patterns, descending air inhibits cloud formation. Since air descends between about 15 and 30 degrees north and south of the equator, clouds are rare and deserts are common at this latitude.

 

Earth Observatory: More information and additional image

 

Image Credit: NASA Earth Observatory image by Jesse Allen and Kevin Ward, using data provided by the MODIS Atmosphere Science Team, NASA Goddard Space Flight Center
Caption: Adam Voiland, with information from Steve Platnick and Tom Arnold

Last Updated: May 10, 2015

Editor: Sarah Loff

Tags:  Air, Aqua Satellite, Earth, Image of the Day,

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NASA : Ola (South Pacific Ocean) .- Ola (Océano Pacífico Sur)

Hola amigos: A VUELO DE UN QUINDE EL BLOG., la Agencia Espacial NASA, nos alcanza la información sobre un Ciclón Tropical Ola:  gigantesca que se formó en el Océano Pacífico Sur, captada por NASA's Aqua Satellite . Ciclón Tropical Ola estaba siendo golpeada por cizalladura vertical del viento en el Océano Pacífico Sur, cuando el satélite Aqua de la NASA pasó por encima y captó una imagen infrarroja de la tormenta.

El 3 de febrero de 2015 a las 0900 UTC (4 am hora del Este), el Centro Conjunto de Advertencia de Tifones (JTWC) emitió su último aviso sobre el ciclón tropical Ola. En ese momento, los vientos máximos sostenidos de Ola estaban cerca de 40 nudos (46 mph / 74 kph) y debilitamiento. El epicentro fue ubicado 27.4 de latitud sur y 161,2 de longitud este, a unos 415 millas náuticas (477,6 millas / 768,6 kilometros) al suroeste de Noumea, Nueva Caledonia. Ola estaba moviendo hacia el sur-suroeste a 10 nudos (11,5 mph / 18.5 kph).

On Feb. 3, 2015 at 13:50 UTC (8:50a.m. EST), NASA's Aqua satellite captured this infrared image of Tropical Cyclone Ola that showed wind shear pushing clouds southeast of the center.

Image Credit: 

NASA/NRL

NASA's Aqua Satellite Sees Demise of Tropical Cyclone Ola

 

Tropical Cyclone Ola was being battered by vertical wind shear in the Southern Pacific Ocean when NASA's Aqua satellite passed overhead and captured an infrared picture of the storm.

 

On Feb. 3, 2015 at 0900 UTC (4 a.m. EST), the Joint Typhoon Warning Center (JTWC) issued its final warning on Tropical Cyclone Ola. At that time, Ola's maximum sustained winds were near 40 knots (46 mph/74 kph) and weakening. It was centered 27.4 south latitude and 161.2 east longitude, about 415 nautical miles (477.6 miles/768.6 km) southwest of Noumea, New Caledonia. Ola was moving to the south-southwest at 10 knots (11.5 mph/18.5 kph). 

 

The Moderate Resolution Imaging Spectroradiometer or MODIS instrument aboard Aqua gathered infrared data on the storm on Feb. 3, 2015 at 13:50 UTC (8:50a.m. EST) that showed the temperatures of the cloud tops. Higher cloud tops are colder and are indicative of stronger thunderstorms. The infrared data showed that the clouds and thunderstorms were being pushed to the southeast of the center from moderate northwesterly vertical wind shear.

Forecasters at the JTWC noted that the NOAA-19 polar orbiting satellite provided a microwave image that showed diminishing convection, sheared to the southeast of a partially-exposed low-level circulation center.

The vertical wind shear is forecast to continue increasing as Ola moves into cooler sea surface temperatures. Both of those factors are expected to cause the storm to dissipate by the end of the day on Feb. 3.

 

Rob Gutro
NASA's Goddard Space Flight Center

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On Feb. 1, 2015 at 23:30 UTC (6:30 p.m. EST), NASA's Terra satellite captured this visible image of Tropical Cyclone Ola in the South Pacific Ocean just west of New Caledonia.

Image Credit: 

NASA Goddard MODIS Rapid Response Team

 

Feb. 02, 2015 - NASA Satellite Sees Wind Shear Affecting Tropical Cyclone Ola

NASA's Terra satellite captured a picture of Tropical Cyclone Ola on Feb. 1 that showed northeasterly wind shear was pushing the clouds and showers southwest of the center.

On Feb. 1, 2015 at 23:30 UTC (6:30 p.m. EST), the Moderate Resolution Imaging Spectroradiometer or MODIS instrument that flies aboard NASA's Terra satellite captured a visible image of Tropical Cyclone Ola in the South Pacific Ocean when it was just west of New Caledonia. In the image, Ola appeared somewhat elongated from north to south, as vertical wind shear from the northeast pushed the bulk of clouds to the southwest of the storm's center, making it appear more stretched out. Powerful thunderstorms with high cloud tops still surrounded the center of circulation, however, and appeared a bright white in the MODIS image.

Tropical Cyclone Ola formed late in the day on January 30, 2015  in the South Pacific Ocean about 300 nautical miles northwest of Noumea, New Caledonia (near 19.1 south and 162.1 east). Within 24 hours of its birth, Ola's maximum sustained winds increased rapidly from 35 knots (40 mph/62 kph) to 65 knots (75 mph/120 kph) making it a Category 1 hurricane on the Saffir-Simpson Scale.

Ola has been creeping along in the Southern Pacific Ocean, while remaining west of New Caledonia for a couple of days. New Caledonia is an island located 750 miles (1,210 km) east of Queensland, Australia.

On Feb. 2 the center of circulation was parallel to the northern tip of the island. At 0900 UTC (4 a.m. EST), Tropical cyclone Ola was centered near 23.4 south latitude and 161.9 east longitude, about 245 nautical miles (281.9 miles/453.9 km) west-southwest of Noumea, New Caledonia. Ola was moving to the south-southwest at 10 knots (11.5 mph/18.5 kph) and had maximum sustained winds near 65 knots (75 mph/120 kph) making it a Category One hurricane on the Saffir-Simpson hurricane wind scale.  Ola is generating waves up to 18 feet (5.4 meters) high west of northern New Caledonia.

Forecasters at the Joint Typhoon Warning Center noted that the low-level circulation center has become partially exposed due to moderate northeasterly vertical wind shear. Further, that vertical wind shear is forecast to increase as Ola continues in a southerly direction. In addition, the ocean heat content will decrease, so steady weakening is forecast over the next 48 hours when the storm is expected to dissipate.

Rob Gutro
NASA's Goddard Space Flight Center

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NASA : Cloud Streets in the Bering Sea .- Calles de la nube en el mar de Bering

Hola amigos. A VUELO DE UN QUINDE EL BLOG., . hemos recibido de la Fundación Nacional de Ciencias de Los Estados Unidos, sobre una espectacular fotografía del Mar de Bering, que precisamente la toma da una idea como si fuesen calles de hielo, captada por  NASA's Aqua satellite: Aguas de hielo, viento, temperaturas frías y mar se combinaron para creadas formaciones de nubes dramáticas sobre el mar de Bering a finales de enero de 2015....

La tundra congelada de Rusia se encuentra en el noroeste de la imagen, y Alaska nevado se encuentra en el noreste. El hielo marino se extiende desde la tierra hasta bien entrado el Mar de Bering. Durante la brillante línea de nubes blancas agua oscura en de cerca, filas paralelas. Estas formaciones son conocidas como "calles de nubes".

Más información. lea usted abajo....

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Cloud Streets in the Bering Sea

Ice, wind, cold temperatures and ocean waters combined to created dramatic cloud formations over the Bering Sea in late January, 2015. The Moderate Resolution Imaging Spectroradiometer (MODIS) aboard NASA's Aqua satellite passed over the region and captured this true-color image on Jan. 23.

The frozen tundra of Russia lies in the northwest of the image, and snow-covered Alaska lies in the northeast. Sea ice extends from the land well into the Bering Sea. Over the dark water bright white clouds line in up close, parallel rows. These formations are known as “cloud streets”.

Air blowing over the cold, snowy land and then over ice becomes both cold and dry. When the air then moves over relatively warmer and much moister water and lead to the development of parallel cylinders of spinning air. On the upper edge of these cylinders of air, where the air is rising, small clouds form. Where air is descending, the skies are clear. This clear/cloudy pattern, formed in parallel rows, gives the impression of streets.

The clouds begin over the sea ice, but they primarily hang over open ocean. The streets are neat and in tight rows closest to land, while further over the Bering Sea the pattern widens and begins to become more random. The rows of clouds are also not perfectly straight, but tend to curve. The strength and direction of the wind helps create these features: where the wind is strongest, nearest to shore, the clouds line up most neatly. The clouds align with the wind direction, so the direction of the streets gives strong clues to prevailing wind direction.

Image Credit: NASA/Jeff Schmaltz, MODIS Land Rapid Response Team, NASA GSFC

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Guillermo Gonzalo Sánchez Achutegui

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NASA : Volcanic Smog and Sunglint in the Vanuatu Archipelago

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Volcanic Smog and Sunglint in the Vanuatu Archipelago

The Vanuatu Archipelago is a collection of volcanic islands about 1,800 kilometers (1,100 miles) northeast of Australia. Two of the islands, Gaua and Ambrym, frequently vent sulfurous gases.

On Jan. 7, 2014 NASA's Aqua satellite passed over Vanuatu, allowing the Moderate Resolution Imaging Spectroradiometer (MODIS) aboard to capture this true-color image. A broad plume of volcanic vog and ash rises from Ambrym and spreads across the South Pacific. Vog is a combination of “volcanic” and “smog”, and is formed when gases from a volcano react with sunlight, oxygen and moisture.

The vog appears as a light blue-gray plume which arcs from the volcanic island both to the northwest and to the northeast. In the northeast, the vog crosses a mirror-like swath of silver-gray which runs from north to south. That swath is not volcanic in origin, but is an artifact called “sunglint” – the reflection of the sun off the ocean in a satellite image.

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Image Credit: NASA/Jeff Schmaltz/MODIS Rapid Response Team

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NASA : 33W (Northwestern Pacific Ocean)

NASA Sees Rainfall Quickly Fade in Dying Depression 33W

NASA's TRMM satellite captured this image of Tropical Depression 33W's sparse rainfall on Dec. 4 at 1045 UTC. There were two isolated areas of heavy (red) rainfall.

Image Credit: NASA/SSAI, Hal Pierce

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NASA's TRMM satellite noticed that rainfall became scarce in the Northwestern Pacific Ocean's thirty-third tropical depression in its second day of life. Tropical Depression 33W or TD 33W had weakened and TRMM showed only two isolated areas of heavy rainfall in the fragmented system.

At 0300 UTC on December 4/10 p.m. EST December 3, the Joint Typhoon Warning Center had already issued its final advisory on TD 33W. At that time, TD 33W's maximum sustained winds had already diminished to 25 knots/28.7 mph/46.3 kph. The center of the disorganized depression was located near 15.5 north and 139.1 east, about 354 nautical miles west-northwest of Andersen Air Force Base, Guam. It was moving to the southeast at 4 knots/4.6 mph/7.4 kph.

NASA's Tropical Rainfall Measuring Mission satellite known as TRMM measured the rainfall rates occurring within TD 33W on December 4 at 1045 UTC/5:45 a.m. EST. Two isolated areas within the circulation of the depression revealed heavy rainfall where rain was falling at 2 inches/50 mm per hour. The remaining rainfall in the system was scattered and light, but no rainfall around the center of circulation. Multispectral satellite imagery showed that the low-level circulation center was exposed to outside winds.

Vertical wind shear has literally taken the wind out of the depression. Wind shear increased to more than 30 knots/34.5 mph/55.5 kph and was pounding the depression. TD 33W is expected to move to the northeast and dissipate over the next day.

Text credit: Rob Gutro
NASA's Goddard Space Flight Center

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Dec. 03, 2013 - NASA Sees Thirty-third Tropical Depression Form in Northwestern Pacific

At 0320 UTC on December 3/10:20 p.m. EDT, Dec. 2, NASA's Aqua satellite captured a visible image of the storm, showing that the circulation had become organized and appeared rounded.

Image Credit: NRL-Monterey/NASA

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The Northwestern Pacific Ocean tropical cyclone season continues with the formation of the thirty-third tropical depression today, December 3, 2013.Two NASA satellites provided a look at the newly formed depression's cloud cover and rainfall rates.
At 0320 UTC today, NASA's Aqua satellite passed over the newborn depression. The Moderate Resolution Imaging Spectroradiometer or MODIS instrument captured a visible image of the storm, showing that the circulation had become more organized since the day before. The depression appeared as a rounded area of clouds on the MODIS image. NASA's Tropical Rainfall Measuring Mission or TRMM satellite also passed over the depression, but only over the northwestern edge. During the overpass, TRMM's Precipitation Radar instrument identified an area of moderate to heavy rainfall north of the center of circulation, where rain was falling at a rate of 1 inch/30 mm per hour.
On December 3 at 1500 UTC/10 a.m. EST, Tropical Depression 33W had maximum sustained winds near 30 knots/34.5 mph/55.5 kph. It was located approximately 369 nautical miles/424.6 miles/683.4 km west-northwest of Guam, near 16.0 north latitude and 138.9 east longitude. 33W was moving to the north at 6 knots/6.9 mph/11.1 kph but is expected to turn to the northeast.
The National Weather Service does not expect Guam to be adversely affected by the depression as forecasts for the next several days call for mostly sunny skies. Wednesday, December 4 is expected to bring the breeziest conditions from the depression. The National Weather Service expects winds on that day to be from the east-southeast at 10 to 15 mph, with gusts as high as 18 mph.
Forecasters at the Joint Typhoon Warning Center expect Tropical Depression 33W to become extra-tropical in the next day or two. The depression is expected to curve to the northeast and continue in that general direction for the next couple of days toward the Northern Mariana Islands.
Text credit: Rob Gutro
NASA's Goddard Space Flight Center

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NASA - Springtime in the Bay of Biscay

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Springtime in the Bay of Biscay, off the coast of France, as in most places, is a season of abundant growth. On April 20, 2013, the Moderate Resolution Imaging Spectroradiometer (MODIS) aboard NASA's Aqua satellite captured this true-color image of the dynamic growth of a springtime phytoplankton bloom. The swirling colors indicate the presence of vast numbers of phytoplankton – tiny plant-like microorganisms that live in both fresh and salt water. Although these organisms live year-round in the Bay of Biscay, it is only when conditions are right that explosive blooms occur. In spring, the lengthening sunlight, the increased nutrient load swept into the Bay from ocean currents and from snowmelt carried by freshwater rivers, combined with warming waters create the perfect conditions to spur phytoplankton in to tremendous growth. The result is a swirling, multi-hued discoloration that can be easily seen from space. Each year, typically from March through April, such blooms occur in the Bay of Biscay. By May, however, conditions are not as favorable and the blooms fade, then disappear.

Image Credit: NASA GSFC

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NASA - Sea Ice Off Eastern Greenland

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Sea Ice Off Eastern Greenland

The MODIS instrument on NASA's Aqua satellite captured this visible image of Sea Ice off eastern Greenland on October 16, 2012.

Image Credit: NASA/GSFC/Jeff Schmaltz/MODIS Land Rapid Response Team
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