The purpose of sampling was to search for millennial cypress trees to reconstruct climatic changes in Tajikistan over the last millennium, and to collect cypress samples at different altitudes to study gradient differences in the response of annual rings to climate.
  The resulting samples will be analyzed in the laboratory of the Institute of Water Problems, Hydropower and Ecology at NAST.
  This field study is supported by China's Natural Key Research and Development Program (2023YFE0102700).