Comparing forest measurements from tree rings and a space-based index of vegetation activity in Siberia

Andrew G. Bunn, Malcolm Hughes, Alexander V. Kirdyanov, Mark Losleben, Vladimir V. Shishov, Logan T. Berner, Alexander Oltchev, Eugene A. Vaganov

Research output: Contribution to journalArticle

30 Citations (Scopus)

Abstract

Different methods have been developed for measuring carbon stocks and fluxes in the northern high latitudes, ranging from intensively measured small plots to space-based methods that use reflectance data to drive production efficiency models. The field of dendroecology has used samples of tree growth from radial increments to quantify long-term variability in ecosystem productivity, but these have very limited spatial domains. Since the cambium material in tree cores is itself a product of photosynthesis in the canopy, it would be ideal to link these two approaches. We examine the associations between the normalized differenced vegetation index (NDVI) and tree growth using 19 pairs of tree-ring widths (TRW) and maximum latewood density (MXD) across much of Siberia. We find consistent correlations between NDVI and both measures of tree growth and no systematic difference between MXD and TRW. At the regional level we note strong correspondence between the first principal component of tree growth and NDVI for MXD and TRW in a temperature-limited bioregion, indicating that canopy reflectance and cambial production are broadly linked. Using a network of 21 TRW chronologies from south of Lake Baikal, we find a similarly strong regional correspondence with NDVI in a markedly drier region. We show that tree growth is dominated by variation at decadal and multidecadal time periods, which the satellite record is incapable of recording given its relatively short record.

Original languageEnglish (US)
Article number035034
JournalEnvironmental Research Letters
Volume8
Issue number3
DOIs
StatePublished - 2013

Fingerprint

Siberia
tree ring
vegetation index
vegetation
Growth
dendroecology
Photosynthesis
canopy reflectance
Ecosystems
Lakes
Cambium
arid region
Productivity
Chronology
index
Forests
chronology
Carbon Cycle
Satellites
reflectance

Keywords

  • boreal forest
  • carbon cycling
  • MXD
  • NDVI
  • taiga
  • TRW

ASJC Scopus subject areas

  • Environmental Science(all)
  • Renewable Energy, Sustainability and the Environment
  • Public Health, Environmental and Occupational Health

Cite this

Comparing forest measurements from tree rings and a space-based index of vegetation activity in Siberia. / Bunn, Andrew G.; Hughes, Malcolm; Kirdyanov, Alexander V.; Losleben, Mark; Shishov, Vladimir V.; Berner, Logan T.; Oltchev, Alexander; Vaganov, Eugene A.

In: Environmental Research Letters, Vol. 8, No. 3, 035034, 2013.

Research output: Contribution to journalArticle

Bunn, Andrew G. ; Hughes, Malcolm ; Kirdyanov, Alexander V. ; Losleben, Mark ; Shishov, Vladimir V. ; Berner, Logan T. ; Oltchev, Alexander ; Vaganov, Eugene A. / Comparing forest measurements from tree rings and a space-based index of vegetation activity in Siberia. In: Environmental Research Letters. 2013 ; Vol. 8, No. 3.
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