MSGID: 1:317/3 62fe7e42   
   PID: hpt/lnx 1.9.0-cur 2019-01-08   
   TID: hpt/lnx 1.9.0-cur 2019-01-08   
    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.   
      
      
    Pollen and Flying Seeds   
      
      August 18, 2022   
      
      
       #01 (7)   
      
      Photographer:  Paolo Bardelli   
      Summary Author:  Paolo Bardelli   
      
      Even if we don't realize it, during springtime the sky is crossed by   
      large quantities of flying seeds and  pollen. The photo at top is a   
      sum of 30 shots showing the presence of many such seeds as observed   
      from Albusciago, Italy, on April 14, 2020. In addition, the   
      proliferation of pollen grains, though practically invisible, can   
      produce the spectacle seen on the bottom photo – a  corona about the   
      Sun.   
      
      Mid-April was quite clear in Albusciago, due to  foehn winds   
      (strong, warm and dry winds), while at the same time birch trees were   
      blooming. The very low relative humidity (measured at 12% at my weather   
      station) caused the release of large quantities of pollen into the air.   
      It was thus possible to detect a "pollen corona," created by the   
       diffraction of sunlight by the minute, elliptically shaped pollen   
      grains.   
      
      Though springtime can be difficult for people like me who  suffer   
      with allergies, being able to observe this pollen corona offered some   
      consolation. Note,  always use extreme caution when looking anywhere   
      near the Sun. Here, I used the top of a chimney to block the Sun and   
      made sure not to look through the viewfinder.   
      
      Photo details: Canon 70D, zoom lens 17/85 mm. with polarizing filter.   
      Processing: PS CC, Startrails.   
      
      
      Albusciago, Italy Coordinates: 45.7395, 8.7939   
      
      
   Related EPODs   
      
       Pollen and Flying Seeds  Volcanic Sunsets Observed from Mutare,   
      Zimbabwe in 2022  Distortion of the Setting Moon and Lower Mock   
      Mirage  Fogbow Observed from the Ground and from a Tower  Atacama   
      Desert and Volcanic Twilight  Triple Halo Event - 22° Circular Halo,   
      9° Halo, and Circumscribed Halo   
       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   
       
   --- up 24 weeks, 3 days, 20 minutes   
    * Origin: -=> Castle Rock BBS <=- Now Husky HPT Powered! (1:317/3)   
   SEEN-BY: 15/0 106/201 114/705 123/120 129/331 153/7715 229/111 112   
   SEEN-BY: 229/113 317 400 426 428 470 664 700 292/854 298/25 305/3   
   SEEN-BY: 317/3 320/219 396/45   
   PATH: 317/3 229/426