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  • ES Picture of the Day 11 2022

    From Dan Richter@1:317/3 to All on Tue Jan 11 11:00:56 2022
    EPOD - a service of USRA

    The Earth Science Picture of the Day (EPOD) highlights the diverse processes and phenomena which shape our planet and our lives. EPOD will collect and archive photos, imagery, graphics, and artwork with short explanatory
    captions and links exemplifying features within the Earth system. The
    community is invited to contribute digital imagery, short captions and
    relevant links.


    Lenticular Clouds Over Rocky Mountain National Park

    January 11, 2022

    Lenticular_93A6118_2048

    Photographer: Richard H. Hahn

    Summary Author: Richard H. Hahn

    This vibrant photo of lenticular clouds over Deer Mountain in
    the Rocky Mountain National Park was taken just before sunrise on
    October 21, 2021. Lenticular clouds typically form on the downwind or
    lee side of the front range of the Rocky Mountains, where moist,
    stable air hits a disturbance and is forced upwards. As the air
    encounters this disturbance, it can cool below the local dew point
    to form these distinctive clouds. Clear sky to the east of the
    mountains allowed the sunrise light to illuminate the lenticulars with
    long wavelength light.

    Photo details: Canon EOS R5, Canon EF70-200mm f/2.8L III USM,
    1/15s@f/11, ISO 800, lens focal length 70mm.
    * Estes Park, Colarado Coordinates: 40.377, -105.521

    Related EPODs

    Lenticular Clouds Over Rocky Mountain National Park Mountain
    Shadow Projected onto Clouds Crepuscular Ray and Venus Shelf
    Cloud and Squall Line Approaching Syracuse, Italy Sunset and
    Mammatus Clouds Observed in Sicily Fogbow Over Southern Ontario,
    Canada
    More...

    Cloud Links

    * Atmospheric Optics
    * The Cloud Appreciation Society
    * Cloud Atlas
    * Color and Light in Nature

    -
    Earth Science Picture of the Day is a service of the Universities
    Space Research Association.

    https://epod.usra.edu

    --- up 5 weeks, 2 days, 20 hours, 43 minutes
    * Origin: -=> Castle Rock BBS <=- Now Husky HPT Powered! (1:317/3)
  • From Dan Richter@1:317/3 to All on Fri Feb 11 11:01:16 2022
    EPOD - a service of USRA

    The Earth Science Picture of the Day (EPOD) highlights the diverse processes and phenomena which shape our planet and our lives. EPOD will collect and archive photos, imagery, graphics, and artwork with short explanatory
    captions and links exemplifying features within the Earth system. The
    community is invited to contribute digital imagery, short captions and
    relevant links.


    Glacial Striations and Newfie

    February 11, 2022



    Betty on Quaker Ridge glacial striations 2

    Photographer: John Stetson

    Summary Author: John Stetson

    Featured above is a view from the top of Quaker Ridge in Casco,
    Maine. Striations can clearly be seen on this metamorphic rock
    outcrop. When glaciers retreated here, approximately 12,000 years
    ago, these linear marks were left behind. A shallow covering of snow
    had melted off of the rock's surface on this early winter's day,
    allowing the striations to be examined in some detail. My dog, Betty, a
    Newfoundland or "newfie" provides scale to the outcrop. Photo taken
    on December 15, 2121.
    * Casco, Maine Coordinates: 43.9692, -70.5212

    Related EPODs

    Glacial Striations and Newfie Archive - Pancake Rocks, New
    Zealand Earth Pyramids In South Tyrol, Italy Archive - Owens
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    Geology Links

    * Earthquakes
    * Geologic Time
    * Geomagnetism
    * General Dictionary of Geology
    * Mineral and Locality Database
    * Mohs Scale of Mineral Hardness
    * This Dynamic Earth
    * USGS
    * MyShake - University of California, Berkeley
    * USGS Ask a Geologist
    * USGS/NPS Geologic Glossary
    * USGS Volcano Hazards Program

    -
    Earth Science Picture of the Day is a service of the Universities
    Space Research Association.

    https://epod.usra.edu

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  • From Dan Richter@1:317/3 to All on Fri Mar 11 11:00:28 2022
    EPOD - a service of USRA

    The Earth Science Picture of the Day (EPOD) highlights the diverse processes and phenomena which shape our planet and our lives. EPOD will collect and archive photos, imagery, graphics, and artwork with short explanatory
    captions and links exemplifying features within the Earth system. The
    community is invited to contribute digital imagery, short captions and
    relevant links.


    Crepuscular Rays in the Philippines and Rainbow Wheel Over Belgium

    March 11, 2022


    IMG20210701183359

    Arc-en-ciel-30mar2018-soir(1)

    Photographers: Joaquinna Reigne P. Barbosa (top); Thierry
    Lombry (bottom)

    Summary Author: Joaquinna Reigne P. Barbosa; Thierry Lombry;
    Cadan Cummings

    The top photo features crepuscular rays visible behind clouds at
    sunset on Boracay Island, Philippines. Crepuscular Rays, also known
    as “God rays”, are sunbeams that usually appear during sunrise or
    sunset. The rays form when the Sun passes behind a cloud or
    landform on the horizon, and a portion of the light shines between the
    gaps. These sunbeams are emphasized when there is dust, smoke, and
    other small particles in the atmosphere due to increased Rayleigh
    scattering of incoming sunlight. This photo was taken on July 1, 2021.

    In contrast, the bottom photo taken near Namur, Belgium on March 30,
    2018 shows sunbeams emanating from the horizon near a rainbow.
    Atmospheric optics events can either originate from the horizon near
    the Sun or at the antisolar point opposite the Sun. Since rainbows
    always arise at the point in the sky directly opposite the Sun, these
    sunbeams are an excellent example of anti-crepuscular rays often
    called a rainbow wheel. The phenomenon was named because the rays
    appear like spokes of a wheel formed with the primary and secondary
    rainbows. Both the crepuscular and anti-crepuscular rays in the images
    above appear to diverge from the horizon due to perspective.
    * Boracay Island, Philippines Coordinates: 11.9674, 121.9248
    * Namur, Belgium Coordinates: 50.4649, 4.8651

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    More...

    Atmospheric Effects Links

    * Atmospheric Optics
    * Optic Picture of Day: Gruppo Astrofili Galileo Galilei
    * Color and Light in Nature
    * The Colors of Twillight and Sunset
    * Refraction Index
    * Image Gallery: Atmospheric Effects
    * What is a Rainbow?

    -
    Earth Science Picture of the Day is a service of the Universities
    Space Research Association.

    https://epod.usra.edu

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    * Origin: -=> Castle Rock BBS <=- Now Husky HPT Powered! (1:317/3)
  • From Dan Richter@1:317/3 to All on Mon Apr 11 12:01:10 2022
    EPOD - a service of USRA

    The Earth Science Picture of the Day (EPOD) highlights the diverse processes and phenomena which shape our planet and our lives. EPOD will collect and archive photos, imagery, graphics, and artwork with short explanatory
    captions and links exemplifying features within the Earth system. The
    community is invited to contribute digital imagery, short captions and
    relevant links.


    Palmer Archipelago, Antarctica Reflection

    April 11, 2022

    _H5A9832_1d(1)

    Photographer: Gianluca Lombardi

    Summary Author: Gianluca Lombardi

    The photo above was taken near the Fief range on Wiencke Island and
    features the calm, reflective waters of the Palmer Archipelago,
    Antarctic Peninsula. At the entrance to the Neumayer Channel the
    wind suddenly stopped blowing at sea level. However, the wind
    likely strengthened at higher altitudes as it started sweeping the
    clouds and leaving a mixture of thin clouds over the mountains. The
    sea was totally immobile, creating a mirror surface. This stillness
    gave a feeling of floating in the air, in a surreal silence.
    * Wiencke Island, Antarctica Coordinates: -64.833333, -63.383333

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    More...

    Cryosphere Links

    * Guide to Frost
    * What is the Cryosphere?
    * Bentley Snow Crystals
    * Glaciers of the World
    * Ice, Snow, and Glaciers: The Water Cycle
    * The National Snow and Ice Data Center Google Earth Images
    * Snow and Ice Crystals

    -
    Earth Science Picture of the Day is a service of the Universities
    Space Research Association.

    https://epod.usra.edu

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  • From Dan Richter@1:317/3 to All on Wed May 11 12:01:00 2022
    EPOD - a service of USRA

    The Earth Science Picture of the Day (EPOD) highlights the diverse processes and phenomena which shape our planet and our lives. EPOD will collect and archive photos, imagery, graphics, and artwork with short explanatory
    captions and links exemplifying features within the Earth system. The
    community is invited to contribute digital imagery, short captions and
    relevant links.


    Antares and the Moon

    May 10, 2022

    Ormefoto - vendicari luna antares

    Photographer: Orazio Mezzio

    Summary Author: Orazio Mezzio

    Seeking out opportunities to photograph nature and the night sky, we
    arrived to the Vendicari Nature Reserve in the middle of the night
    and walked in to find the ideal vantage point to start taking photos.
    As we entered the beautiful bogs of the reserve, we noticed some
    clouds chasing the Moon. Not wanting to miss capturing this moment,
    we interrupted the exploration to quickly positioned the equipment to
    take this photo...click! As a result of the thin cloud layer scattering
    incoming light, a rainbow appears to crown the Moon, which rose at the
    same pace with the head of the Scorpius constellation.

    Looking at the pond in the foreground, the still waters silently
    reflected the colors given off by the apparent rivalry between the
    reddish Antares and the Moon. The tranquil scene was further
    enhanced by the reflection of shining stars and behind them the heart
    of the Milky Way. Altogether, it is difficult to distinguish
    between the various astronomical features due to their blended colors
    and rare alignment. As evident in this photo, it is true that nearly
    everything in the universe reflects energy, and even a swamp can
    rejoice within its beauty.

    Photo details: Nikon D750, Nikkor 50mm, f/1.8, 5 second exposure,
    ISO-640
    * Noto, Province of Syracuse, Italy Coordinates: 36.791, 15.091

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    Night Sky Links

    * Space Weather Live
    * Space Weather Live Forum
    * About the Moon
    * American Meteor Society
    * Arbeitskreises Meteore e.V.
    * Global City Lights
    * Heavens Above Home Page
    * The International Meteor Organization
    * Lunar and Planetary Institute
    * MoonConnection
    * NASA Eclipse Web Page
    * Understanding The Moon Phases

    -
    Earth Science Picture of the Day is a service of the Universities
    Space Research Association.

    https://epod.usra.edu

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  • From Dan Richter@1:317/3 to All on Mon Jul 11 12:01:26 2022
    EPOD - a service of USRA

    The Earth Science Picture of the Day (EPOD) highlights the diverse processes and phenomena which shape our planet and our lives. EPOD will collect and archive photos, imagery, graphics, and artwork with short explanatory
    captions and links exemplifying features within the Earth system. The
    community is invited to contribute digital imagery, short captions and
    relevant links.


    Fogbow over Sebago Lake, Maine

    July 11, 2022


    Fogbow 041522 Betty 2

    Photographer: John Stetson

    Summary Authors: John Stetson; Jim Foster

    My trusty pooch and I observed this alluring fogbow over Sebago
    Lake, Maine, on the morning of April 15, 2022. Fogbows occur when light
    (sunlight, moonlight, streetlights, etc.) interacts with cloud
    droplets that are approximately 10 to more than 100 times smaller than
    a raindrop. Because these droplets are tiny, any coloration is wan. As
    with rainbows, in order to see these inconspicuous bows, the Sun
    must be at the observers back (180 degrees from the fogbow itself)
    even if it's hidden from view.
    * Sebago Lake, Maine Coordinates: 43.8537, -70.5621

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    Atmospheric Effects Links

    * Atmospheric Optics
    * Optic Picture of Day: Gruppo Astrofili Galileo Galilei
    * Color and Light in Nature
    * The Colors of Twillight and Sunset
    * Refraction Index
    * Image Gallery: Atmospheric Effects
    * What is a Rainbow?

    -
    Earth Science Picture of the Day is a service of the Universities
    Space Research Association.

    https://epod.usra.edu

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  • From Dan Richter@1:317/3 to All on Thu Aug 11 12:00:32 2022
    EPOD - a service of USRA

    The Earth Science Picture of the Day (EPOD) highlights the diverse processes and phenomena which shape our planet and our lives. EPOD will collect and archive photos, imagery, graphics, and artwork with short explanatory
    captions and links exemplifying features within the Earth system. The
    community is invited to contribute digital imagery, short captions and
    relevant links.


    Red Coloration in Salt Marshes

    August 11, 2022


    C541ACC6-A239-439E-AE2B-3A010A8439ED (1)

    Photographer: Denis Huber

    Summary Author: Denis Huber; Jim Foster

    The photo above shows a "red" salt marsh as seen along the
    Mediterranean coast, near Aigues-Mortes, France. The beginning of the
    summer season is often the best time to observe pink and red color in
    waterways here. The obvious coloration is caused by the marsh’s
    microscopic algae, which produce the pigment beta-carotene.
    Evidently, as the water temperature rises, if the salt content is high,
    the water will redden as algae reproduce. Photo taken on May 27, 2022.

    Aigues-Mortes, France Coordinates: 43.54833333, 4.18055556


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    Plant Links

    * Discover Life
    * Tree Encyclopedia
    * What are Phytoplankton?
    * Encyclopedia of Life - What is a Plant?
    * USDA Plants Database
    * University of Texas Native Plant Database
    * Plants in Motion
    * What Tree is It?

    -
    Earth Science Picture of the Day is a service of the Universities
    Space Research Association.

    https://epod.usra.edu

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  • From Dan Richter@1:317/3 to All on Tue Oct 11 12:01:24 2022
    EPOD - a service of USRA

    The Earth Science Picture of the Day (EPOD) highlights the diverse processes and phenomena which shape our planet and our lives. EPOD will collect and archive photos, imagery, graphics, and artwork with short explanatory
    captions and links exemplifying features within the Earth system. The
    community is invited to contribute digital imagery, short captions and
    relevant links.


    Golden Cumulus Clouds over Mt Makiling at Sunrise

    October 11, 2022

    20220302_062614-01

    Photographer: Paul Anton D. Mahinay
    Summary Author: Paul Anton D. Mahinay

    Shown above are eye-catching, cumulus clouds as observed at sunrise
    over Mt Makiling, from a highway, near Batangas, Philippines. The
    golden color of the clouds at right is due to the increased
    pathlength of sunlight (greater scattering) as the Sun approaches
    the horizon. Note that the cirrus clouds (lower left), attaining
    higher altitudes than the cumulus clouds, show little coloring.
    Additionally, airborne dust and haze act to further enhance
    scattering.

    Mt. Makiling is a dormant volcano. Its name is derived from Maria
    Makiling, a guardian fairy of the mountains in Philippine Mythology.
    Photo taken on March 3, 2022.


    Batangas, Philippines Coordinates: 14.1364, 121.1944


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    Atmospheric Effects Links

    * Atmospheric Optics
    * Optic Picture of Day: Gruppo Astrofili Galileo Galilei
    * Color and Light in Nature
    * The Colors of Twillight and Sunset
    * Refraction Index
    * Image Gallery: Atmospheric Effects
    * What is a Rainbow?

    -
    Earth Science Picture of the Day is a service of the Universities
    Space Research Association.

    https://epod.usra.edu

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    * Origin: -=> Castle Rock BBS <=- Now Husky HPT Powered! (1:317/3)
  • From Dan Richter@1:317/3 to All on Fri Nov 11 11:01:06 2022
    EPOD - a service of USRA

    The Earth Science Picture of the Day (EPOD) highlights the diverse processes and phenomena which shape our planet and our lives. EPOD will collect and archive photos, imagery, graphics, and artwork with short explanatory
    captions and links exemplifying features within the Earth system. The
    community is invited to contribute digital imagery, short captions and
    relevant links.


    Factors Determining Snowmelt in the Rocky Mountains

    November 11, 2022

    TomMC_EPOD.ColoradoRockiesSnowpack (004)

    TomMC_EPOD.60.ColoradoRiverConditionsJuly2022 (003)

    Photographer: Thomas McGuire

    Summary Author: Thomas McGuire

    Some 40 million people in the Southwestern United States depend, in a
    large part, on the Colorado River for agricultural and municipal
    water. About 90% of Colorado River water originates from melting
    snowpacks in the Rocky Mountains, such as shown on the photo above at
    Independence Pass, Colorado (taken in July 1977).

    2021-2022 was a relatively decent year for snowfall in the Rockies, yet
    both major reservoirs, Lake Powell and Lake Mead, are at
    dangerous and historic low water levels. And they’re expected to
    continue to go down in the coming year.

    With warming of the climate in the Southwest, the tree line has
    been creeping up mountain slopes. Trees lose water by transpiration
    from leaves and needles. Snow surfaces lose water by the process known
    as sublimation. Because trees absorb more sunlight than highly
    reflective snow, an early snowmelt exposes the dark soil, which absorbs
    more solar energy. Additionally, dust blown from the dry soil onto
    the snow makes the snow surface darker, absorbing even more sunlight
    and further contributing to earlier snowmelt -- see chart above. This
    confluence of factors is a challenge for the inhabitants of the
    Southwest. Fortunately, there are many alternatives allowing the
    residents to adapt to the “new normal.”


    Independence Pass, Colorado Coordinates: 39.1086, -106.5640


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    Climatology Links

    * Aerosols: Tiny Particles, Big Impact
    * JetStream - An Online School for Weather
    * Climate History
    * National Centers for Environmental Information
    * Global Climate Animations
    * NOAA Climate Analysis Branch
    * Vital Climate Graphics

    -
    Earth Science Picture of the Day is a service of the Universities
    Space Research Association.

    https://epod.usra.edu

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