Journal of Climate Research

Journal of Climate Research

Application of Radiography and Photography methods for measuring the width of the cypress tree annual rings (Cupressus Sempervirens L.var.horizontalis)

Document Type : Original Article

Authors
javad torkaman
mehrdad daryaei 1
nasrin ahooghalandari 2
1 -Associate Professor
2 university of guilan
10.22034/jcr.2024.196362
Abstract
Abstract

Different plant species, especially trees, react to the changes of climatic factors during their life.The science that deals with the reconstruction of past climatic factors based on the annual rings of trees is called dendrochronology. In this science, the temporal adaptation of rings and distinguishing true annual rings from false rings is important.The aim of this research is to reduce the error of measuring the annual growth ring width. In order to detect the real annual rings, the X-ray radiography method was used in comparison with the usual method of measuring the annual growth ring width of the cypress tree in the Rudbar region.The annual ring width was measured with an accuracy of 0.01 mm using the Miniviwer software.The results after time adaptation and standardization were compared with the results of the usual method. The results showed that the matching rate (GLK) in the radiographic method is 95% and in the conventional method is 70%. which shows the greater accuracy of this method compared to the usual method of measuring the ring growth width of the cypress tree. The correlation of the chronology obtained from radiographic measurements with precipitation and temperature changes is higher than the chronology obtained from the data obtained by the usual method.

Keywords: Cypress, X-ray radiography, Dendrochronology

Abstract

Different plant species, especially trees, react to the changes of climatic factors during their life.The science that deals with the reconstruction of past climatic factors based on the annual rings of trees is called dendrochronology. In this science, the temporal adaptation of rings and distinguishing true annual rings from false rings is important.The aim of this research is to reduce the error of measuring the annual growth ring width. In order to detect the real annual rings, the X-ray radiography method was used in comparison with the usual method of measuring the annual growth ring width of the cypress tree in the Rudbar region.The annual ring width was measured with an accuracy of 0.01 mm using the Miniviwer software.The results after time adaptation and standardization were compared with the results of the usual method. The results showed that the matching rate (GLK) in the radiographic method is 95% and in the conventional method is 70%. which shows the greater accuracy of this method compared to the usual method of measuring the ring growth width of the cypress tree. The correlation of the chronology obtained from radiographic measurements with precipitation and temperature changes is higher than the chronology obtained from the data obtained by the usual method.

Keywords: Cypress, X-ray radiography, Dendrochronology

Abstract

Different plant species, especially trees, react to the changes of climatic factors during their life.The science that deals with the reconstruction of past climatic factors based on the annual rings of trees is called dendrochronology. In this science, the temporal adaptation of rings and distinguishing true annual rings from false rings is important.The aim of this research is to reduce the error of measuring the annual growth ring width. In order to detect the real annual rings, the X-ray radiography method was used in comparison with the usual method of measuring the annual growth ring width of the cypress tree in the Rudbar region.The annual ring width was measured with an accuracy of 0.01 mm using the Miniviwer software.The results after time adaptation and standardization were compared with the results of the usual method. The results showed that the matching rate (GLK) in the radiographic method is 95% and in the conventional method is 70%. which shows the greater accuracy of this method compared to the usual method of measuring the ring growth width of the cypress tree. The correlation of the chronology obtained from radiographic measurements with precipitation and temperature changes is higher than the chronology obtained from the data obtained by the usual method.

Keywords: Cypress, X-ray radiography, Dendrochronology

Abstract

Different plant species, especially trees, react to the changes of climatic factors during their life.The science that deals with the reconstruction of past climatic factors based on the annual rings of trees is called dendrochronology. In this science, the temporal adaptation of rings and distinguishing true annual rings from false rings is important.The aim of this research is to reduce the error of measuring the annual growth ring width. In order to detect the real annual rings, the X-ray radiography method was used in comparison with the usual method of measuring the annual growth ring width of the cypress tree in the Rudbar region.The annual ring width was measured with an accuracy of 0.01 mm using the Miniviwer software.The results after time adaptation and standardization were compared with the results of the usual method. The results showed that the matching rate (GLK) in the radiographic method is 95% and in the conventional method is 70%. which shows the greater accuracy of this method compared to the usual method of measuring the ring growth width of the cypress tree. The correlation of the chronology obtained from radiographic measurements with precipitation and temperature changes is higher than the chronology obtained from the data obtained by the usual method.

Keywords: Cypress, X-ray radiography, Dendrochronology
Keywords
Keywords: Cypress
X-ray radiography
Dendrochronology
  1. Balapour,Sh.,Jalilvand,H., Raeini, M., and Asadpour, H ,2010, Relationship between tree rings of Beech (Fagus orientalis) with some climatic variables in experimental  forest of Natural Resources Faculty (Darabcola). Watershed Management Research Journal(Pajouhesh & Sazandegi), 88: 1-10. (In Persian).
  2. Kazemi, S.M., Asadpour, H and. Balapour Sh,2012, Investigation on relationship between tree rings of Cupressus sempervirens l . var .horizantalis and climatic variables, Iranian Journal of Wood and Paper Science Research Vol.27 No. (2),361-371.
  3. Mehrabi, S,2013,The use of X-ray method to study annual growth variation  of Pinus eldarica, Iranian Journal of Wood and Paper Science Research Vol.28 No. (2):341-353. DOI:http://dx.doi.org/10.22092/ijwpr.2013.2949
  4. Bill, J., Daly, A., Johnsen, Ø., Dalen,K.S,2012,DendroCT  Dendrochronology without damage,Dendrochronologia 30(3): 223-230.
  5. Creasman, P.P,2011, Basic principles and methods of dendrochronological specimen curation, Tree-Ring Research 67(2): 103-115.
  6. Grabner, M., Salaberger, D., Okochi, T,2009,The need of high resolution μ-X-ray CT in dendrochronology and in wood identification. In: Proceedings of 6th International Symposium on Image and Signal Processing and Analysis. Pp 349-352.
  7. Jones, F. W., and. Parker, M. L.1970, G. S. C. tree -ring scanning densitometer and data acquisition system. Tree -Ring Bulletin, Vol. 30 Nos. 1 -4.
  8. Mannes D, Lehmann E, Cherubini P, Niemz P,2007, Neutron imaging versus standard X-ray densitometry as method to measure tree-ring wood density. Trees 21: 605–612.
  9. Nasswettrová, A., Křivánková, S., Šmíra, P., Sanace S.R.O, 2017, Comparison Of The Results Of Dendrochronological Measuring Based On Different Images Of A Historical Wood Sample Of Silver Fir (Abies Alba) From The Czech Republic. Wood Research 62 (1): 113-124.
  10. Okochi, T., Hoshino, Y., Fujii, H., Mitsutani, T, 2007, Nondestructive tree-ring measurements for Japanese oak and Japanese beech using micro-focus X-ray computed tomography, Dendrochronologia 24(2-3): 155-164.
  11. Parsapajuoh,D,1971,Identification of wood by radiographic method, Journal of Forestry, No. 25, Faculty of Natural Resources, Tehran University, pp 1-22.
  12. Parsapajouh,D,1984,Wood Technology,Tehran University Publications.pp.66-86.
  13. Parker,M.L., Meleskie, K.R,1970, Preparation of X-ray negatives of tree-ring specimens for dendrochronological analysis. Tree-Ring Bulletin 30:11-22.
  14. Polge,H,1970,The use of X-ray densitometric methods in dendrochonology. Tree-Ring Bulletin 30: 1–10.
Journal of Climate Research
Volume 1403, Issue 57 - Serial Number 57
Vol. 15, No. 57, ُSpring 2024
Autumn 2024
Pages 173-180