The weather has suddenly changed from mild to severe. “Gornyak”, a wind from the mountains, arose, it started snowing. Yesterday, the east-shore mountains were perfectly seen. Today, we cannot even see the shore we have come from. And this is only 3.5 km away from the ice camp.
Perhaps you remember heavy city wind which occurs on sunny days around tall houses. It happens because the sunny-side air warms up quicker than that of the shadow-side. The difference in temperatures forces the warm air haste towards the cold one, and there comes the wind! Baikal is surrounded by quaint-shaped mountains. Here, in the gorges of the Baikal Mountains, we observe the same processes as in a city, but many times stronger.
As a result, the winds become so powerful that roofs are blown away, trees are rooted out, ships are turned over. Wind speed can reach up to 50 m/h, and this is 180 km/h!
Baikal winds have got names. Almost all natural forces are personified here, at Baikal. They have their own temper, whims and fancies. The most famous winds are “Barguzin” blowing from the north-east, from the Barguzin Valley; “Kultuk” coming from south-west; the northern “Verkhovik”, and the Baikal strongest “Sarma” breaking free from the valley with the river of the same name and blowing across the lake. There are also two transverse winds “Shelonik” and “Gornyak” blowing from the east and west, respectively.
It is thought that the most treacherous moment is when three winds simultaneously blow from three different directions. Local trees have adapted themselves to these conditions. They are low, crooked and sturdy. An exuberant beauty of an oak from Central Russia would be blown away in a fracture of a second. Beauty is a very flexible concept.
Today we did not have any heavy winds. The construction of the neutrino telescope is underway.
On the new fourth cluster:
- The central string is almost completely mounted! What does “almost completely” mean? Floats remained to be hooked and after that the string is to be tied to the others. We will do the latter together with other strings. The main thing is that all the optical and acoustic modules and LED matrices have already been attached.
- The winch was moved to the seventh string, which will be put together from the very beginning. After lunchtime, we set the anchor, added bottom acoustic modules and suddenly, the time was over.
- On the first string the bottom and middle sections were fully assembled. The fifth optical module of the top section was installed. It seems that one more string will be ready tomorrow.
- On the third cluster, we were mounting the fourth string.
The running of the bottom cable has been launched. Anatolich managed to grasp this matter after all, attaboy! We pulled the cable under the ice, bound it to the winch, checked the cable counter. To realize the full complexity of the task, one should get it explained. We are on the ice. The depth ranges from zero to almost 1.5 km. The lake bottom is extremely uneven with its hollows and hills. The cable must be laid carefully right to the shore without any loops and ruptures.
It is not an easy task even if we would just do it on an even and dry surface, because the distance to cover is many kilometres long. Now, let us complicate matters a little. We are on the ice and do not see the bottom at all. And the solution of this problem is a compound mathematical curve. Not every theoretician knows how to tackle it.
Best wishes, dear ladies! Be happy, cheerful and always optimistic!