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Last update: 7/May/2007

[Japanese Page HERE!]

Researcher information


Name Hideki KOBAYASHI (given name, family name)
Sex Male
Date of Birth October 6, 1976.

Phone 81-(0)45-778-5666
Fax 81-(0)45-778-5706
E-mail

Research Interests

General

(1) Satellite monitoring of vegetation.

(2) Evaluation of photosynthetically active radiation over Asia.

(3) Radiative transfer calculation of the light environment in the forest canopy

Specific

(1) Satellite monitoring of vegetation.

Normalized difference vegetation index (NDVI) derived from NOAA/AVHRR, SPOT/VEGETATION, and Terra, Aqua/MODIS are unique measurements of long-term variations in global vegetation dynamics. The NDVI data have been used for the detection of the seasonal and interannual variations in vegetation. However, as reported in several studies, NDVI decreases with the increase in clouds and/or smoke aerosol contaminated in the pixels. This study assesses the smoke and clouds effect on long-term NDVI data in Tropics (see figure). This knowledge will help developing the correction method in the tropics in the future.

NDVI in Amazon

(2) Evaluation of photosynthetically active radiation over Asia.

In Southeasta Asia and East Asia, aerosol from forest fire smoke, dust, and urban reduce the photosynthetically active radiation. Currently, we access the PAR variation over Asia using satellite data and atmospheric radiative transfer model.
In addition, we accesse the effect of PAR redution on net primary production in this region. Figure shows the results of the monthly PAR in Southeast Asia during the forest fire periods in 1997.

Monthly PAR variations in Southeast Asia

Publications

  1. Kobayashi, H., and H. Iwabuchi (2008), A coupled 1-D atmosphere and 3-D canopy radiative transfer model for canopy reflectance, light environment, and photosynthesis simulation in a heterogeneous landscape,112, 173-185, Remote Sensing of Environment.

  2. Kobayashi, H., R. Suzuki, and S. Kobayashi (2007), Reflectance seasonality and its relation to the canopy leaf area index in an eastern Siberian larch forest: Multi-satellite data and radiative transfer analyses, Remote Sensing of Environment, 106, 238-252.

  3. Kobayashi, H., and D. G. Dye (2005), Atmospheric conditions for monitoring the long-term vegetation dynamics in the Amazon using normalized difference vegetation index, Remote Sensing of Environment, 97, 519-525.

  4. Kobayashi, H., T. Matsunaga, and A. Hoyano (2005), Net primary production in Southeast Asia following a large reduction in photosynthetically active radiation owing to smoke, Geophys. Res. Lett., 32, L02403, doi:10.1029/ 2004GL021704.

  5. Kobayashi, H., T. Matsunaga, A. Hoyano, M. Aoki, D. Komori, and S. Boonyawat (2004), Satellite estimation of photosynthetically active radiation in Southeast Asia: Impacts of smoke and cloud cover, J. Geophys. Res., 109, D04102, doi:10.1029/2003JD0038074

  6. Kobayashi, H., T. Matsunaga, A. Hoyano (2002), Effect of the absorbed photosynthetically active radiation estimation error on net primary production estimation - A study with MODIS FPAR and TOMS untraviolet reflectivity products-, Journal of Remote Sensing Society of Japan, 22(5), 612-624.
    (Written in Japanese with English abstract)

  7. Kobayashi, H., T. Matsunaga, A. Hoyano (2002), A study of the applicability of the leaf area index (LAI) estimation method through the inversion using vegetation canopy reflectance model to the grasslands, Journal of Remote Sensing Society of Japan, 22(3), 274-287.
    (Written in Japanese with English abstract)

Membership in Professional Organizations

1. American Geophysical Union.
2. Meteorological Society of Japan.
3. Remote Sensing Sociaty of Japan.
4. Ecological Society of Japan

Curriculum Vitae

Education

March 1999: B.S. of Science, Department of Physics, Tokyo University of Science .

March 2001: M.S. of Engineering, Interdisciplinary Graduate School of Science and Technology, Tokyo Insitute of Technology

March 2004: Dr. of Engineering, Interdisciplinary Graduate School of Science and Technology, Tokyo Insitute of Technology

Research and professional experience

2004.4-2007.3

Postdoctral Researcher at Ecosystem Change Research Program, Frontier Research Cystem for Global Change

2007.4-present

Researcher at Ecosystem Change Research Program, Frontier Research Cystem for Global Change

Computer Skill

  • C, Fortran Java and VB language
  • IDL/ENVI, Unix/Linux
  • Other Skill

  • Assistant Surveyor License (August 1993)

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