Wind characterization of a Czech Carbon Observation System (CzeCOS) Site – Rajec

  • Shilpi Chawla Global Change Research Institute CAS
  • Vinh Xuan Nguyen Global Change Research Institute CAS
  • Carlos P. Guerra Torres Global Change Research Institute CAS
  • Marian Pavelka Global Change Research Institute CAS
  • Jan Trusina Global Change Research Institute CAS
  • Michal V. Marek Global Change Research Institute CAS
Keywords: wind characteristics, calm conditions, eddy covariance, wind rose

Abstract

The main aim of the study is to investigate general and temporal characteristics of wind speed and direction at Ecosystem station (ES) Rajec located in southern highlands of the Czech Republic which is part of Czech Carbon Observation System (CzeCOS) network. Four years (2013-16) of eddy co-variance data from mature monoculture spruce (Picea abies) forest was used to build the wind rose and analyze the wind characteristics. The prevailing wind directions at ES Rajec were South-East and North-West and general orography of region being a highland does not impact the wind flow. Seasonal variation in the wind was observed which was mainly due to general circulation. The paper also investigates the occurrence of calm wind conditions (u <1 m s-1) which was 6% on an average for four years and the average of day-time and night-time calm conditions were observed as 8% and 4% respectively.

Author Biographies

Shilpi Chawla, Global Change Research Institute CAS

Global Change Research Institute CAS, Bělidla 986/4a, 603 00 Brno, Czech Republic
Faculty of Forestry and Wood Technology, Mendel University in Brno, Zemědělská 1, 613 00 Brno, Czech Republic

Vinh Xuan Nguyen, Global Change Research Institute CAS

Global Change Research Institute CAS, Bělidla 986/4a, 603 00 Brno, Czech Republic
Faculty of Forestry and Wood Technology, Mendel University in Brno, Zemědělská 1, 613 00 Brno, Czech Republic
Department of Ecology, Institute of Tropical Biology VAST, 85 Tran Quoc Toan Street, District 3, Ho Chi Minh City, Vietnam

Carlos P. Guerra Torres, Global Change Research Institute CAS

Global Change Research Institute CAS, Bělidla 986/4a, 603 00 Brno, Czech Republic
Faculty of Forestry and Wood Technology, Mendel University in Brno, Zemědělská 1, 613 00 Brno, Czech Republic
Department of Botany, University of Panama P.O. 0824-00077 Panama, Panama

Marian Pavelka, Global Change Research Institute CAS

Global Change Research Institute CAS, Bělidla 986/4a, 603 00 Brno, Czech Republic

Jan Trusina, Global Change Research Institute CAS

Global Change Research Institute CAS, Bělidla 986/4a, 603 00 Brno, Czech Republic

Michal V. Marek, Global Change Research Institute CAS

Global Change Research Institute CAS, Bělidla 986/4a, 603 00 Brno, Czech Republic

Published
2018-12-18
Section
Articles