Applications of NOAA/AVHRR and Observed Fluxes to Estimate 3 Regional Carbon Fluxes over Black Spruce Forests in Alaska

Tomoyuki Kitamoto, Toru Iwata, Susumu Yamamoto, Masahito Ueyama, Yoshinobu Harazono

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

A simple empirical model was developed to calculate the carbon fluxes on a regional scale by integrating the observed ground truth data at a black spruce forest in interior Alaska in 2005 and original NOAA/AVHRR data. The satellite-derived variables of normalized difference vegetation index (NDVI) and land surface temperature (LST) were related with measured leaf area index (LAI) and measured CO2 flux (NEE) using a sub-empirical model, CBAT. In order to scale up the observed fluxes, gross primary production (GPP) and ecosystem respiration (Reco) were separately determined using NDVI and LST. The parameters and relationships were determined by applying the observed ground truth data in 2005. Comparing to the observed dataset, the diurnal and seasonal variations were calculated reasonably. The model satisfactorily reproduced Reco as an hourly base, but GPP tended to be an overestimation caused by the eliminated effect of vapor pressure deficit (VPD). The GPP, Reco and NEE over Alaska's black spruce forests were estimated as 2330, 1920 and -410 g CO2 m-2, respectively, during the growing season in 2005. Seasonal variations of estimated carbon flux distributions reflected heterogeneous ecosystem conditions.

Original languageEnglish
Pages (from-to)171-183
Number of pages13
JournalJournal of Agricultural Meteorology
Volume63
Issue number4
DOIs
Publication statusPublished - 2007

Fingerprint

Picea mariana
carbon flux
AVHRR
primary production
primary productivity
NDVI
surface temperature
carbon
land surface
seasonal variation
ecosystem respiration
ecosystem
vapor pressure
diurnal variation
leaf area index
respiration
growing season
ecosystems
normalized difference vegetation index

ASJC Scopus subject areas

  • Agronomy and Crop Science
  • Atmospheric Science

Cite this

Applications of NOAA/AVHRR and Observed Fluxes to Estimate 3 Regional Carbon Fluxes over Black Spruce Forests in Alaska. / Kitamoto, Tomoyuki; Iwata, Toru; Yamamoto, Susumu; Ueyama, Masahito; Harazono, Yoshinobu.

In: Journal of Agricultural Meteorology, Vol. 63, No. 4, 2007, p. 171-183.

Research output: Contribution to journalArticle

Kitamoto, Tomoyuki ; Iwata, Toru ; Yamamoto, Susumu ; Ueyama, Masahito ; Harazono, Yoshinobu. / Applications of NOAA/AVHRR and Observed Fluxes to Estimate 3 Regional Carbon Fluxes over Black Spruce Forests in Alaska. In: Journal of Agricultural Meteorology. 2007 ; Vol. 63, No. 4. pp. 171-183.
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