Szkody wyrządzone przez gołoledź i śnieg na przykładzie Nadleśnictwa Herby, na tle panujących warunków pogodowych w styczniu 2010 roku

Autorzy

• Grzegorz Urban Instytut Meteorologii i Gospodarki Wodnej – Państwowy Instytut Badawczy, Oddział we Wrocławiu, ul. Parkowa 30, 51–616 Wrocław
  Tel. +48 71 32 00 161; e-mail: grzegorz.urban@imgw.pl, urbag@poczta.onet.pl
• Wojciech Gil Instytut Badawczy Leśnictwa, Zakład Hodowli Lasu i Genetyki Drzew Leśnych, Sękocin Stary
  ul. Braci Leśnej 3, 05-090 Raszyn
• Tadeusz Zachara Instytut Badawczy Leśnictwa, Zakład Hodowli Lasu i Genetyki Drzew Leśnych, Sękocin Stary, ul. Braci Leśnej 3, 05-090 Raszyn
  Tel. +48 22 7150686; e-mail: T.Zachara@ibles.waw.pl

Abstrakt

At the beginning of 2010 many forests within the Regional Directorate of the State Forests in Katowice were severely damaged by snow and glazed frosts (freezing rain). The Herby Forest District was particularly badly affected. Interference analysis of weather conditions over Europe and Poland, with particular emphasis on the situation in Herby Forest District, indicated that the atmospheric conditions encouraged the formation of snow on 8^th–9^th January 2010. Moreover, freezing rain on 9^th–10^th January 2010 caused extensive glazed frost, which gradually built up and persisted for nearly a day and a half. During the same period, the load on the crown of snow and ice surpassed 40 kg m^-2 which far exceeds the critical value for the pine (the main component of local forest stands). The mass of damaged timber was approximately 350000 m³ of timber and the area of damaged crops and thickets was 313 ha. Pine stands were the most badly affected but young stands of broadleaved species also incurred losses.

Słowa kluczowe

• snow
• glazed frost
• tree damage
• Scots pine