Author Archives

Jari Luomanen

Simultaneous upper tangent arc and rainbows

5.6.2011 3 Jari Luomanen

On 4 June 2011 Pietari Puranen observed these rainbows in Jyväskylä. When he turned around to see the sky around the sun, he observed an upper tangent arc. Remarkably, the arc formed in virga precipitating from the same low clouds…

Displays

Double sun effect

2.6.2011 0 Jari Luomanen

On May 1st 2011 cumulonimbus clouds precipitating hail were commmon. These clouds exhibited clear praecipitatio and later in the evening they featured prominent virga. In these virga a sun pillar formed and as the sun descended behing stratocumulus a double…

Halo information

New book on halos

30.5.2011 15 Jari Luomanen

The Finnish Astronomical Association URSA has just published a new book on halos by Marko Riikonen. This book combines the latest halo science with stunning images from all around the world. Spanning 168 pages, the book presents, illustrates and analyses…

Displays

Liljequist superparhelia & a nucleation agent gun

30.5.2011 0 Jari Luomanen

This Liljequist superparhelia was observed in the spotlight beam on 5 January 2011. The lamp is about a degree or two below the horizon, thus giving the central stage to the Liljequist superparhelia. The Liljequist parhelia can be seen against…

Displays

Atmospheric optics meeting of 2011 in Finland

30.5.2011 1 Jari Luomanen

Finnish Atmospheric optics enthusiasts met on 27-29 May 2011 in the Artjärvi observation centre. The topics of the presentations varied from the latest scientifical results in NLC research and simulation of higher order rainbows to the polar expeditions and observations…

Miscellaneous

Atmospheric optics meeting in Finland

18.5.2010 2 Jari Luomanen

14-16 May saw Finnish atmospheric optics enthusiasts gathering in Finnish Astronomical Association’s (URSA) Artjärvi observation center. The programme for the meeting included presentations on noctilucent cloud observations, halo simulations, chdk-software for compact cameras, diamond dust halo chasing as well as…

Displays

New halo in elliptical halo / Bottlinger family Part II

16.1.2010 10 Jari Luomanen

A video and two new images of the 09-10 January 2010 Display in Kangasala, Finland are now available for viewing (1 – 2 – 3). As you follow the first link please note that the video is displayed below the…

Displays

A mid-summer multihalo in Finland

1.7.2009 24 Jari Luomanen

This display was observed on 1 July 2009 in Tampere, Finland. The most prominent features were the bright upper tangent arc (contributing to a partial circumscribed halo) and the parhelic circle. A faint Wegener arc can be seen rising above…

Displays

Lowitz arcs

28.3.2009 10 Jari Luomanen

Lowitz arcs were first observed by Tobias Lowitz in 1790. Ever since, these arcs have been observed by numerous observers ( 1 ). These particular arcs were photographed on February 19 in Finland.

Displays

Sub-Kern arc and circumnadiral arc

5.1.2009 12 Jari Luomanen

During the night of 2-3 January 2008 subhorizontal plate halos were observed in Tampere, Finland. The Sub-Kern arc and circumnadiral arc (both first discovered by Marko Riikonen in Rovaniemi in December 2008) are the most noteworthy forms in the display.…

Author Archives

Jari Luomanen

Simultaneous upper tangent arc and rainbows

Double sun effect

New book on halos

Liljequist superparhelia & a nucleation agent gun

Atmospheric optics meeting of 2011 in Finland

Atmospheric optics meeting in Finland

New halo in elliptical halo / Bottlinger family Part II

A mid-summer multihalo in Finland

Lowitz arcs

Sub-Kern arc and circumnadiral arc

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