Micrometeorological observations above a Japanese red pine forest within the growing season

Pedram ATTAROD; Masatoshi AOKI; Vilma BAYRAMZADEH; Mohammad Taghi AHMADI

Makale detayları

Micrometeorological observations above a Japanese red pine forest within the growing season

Yazarlar:

Pedram ATTAROD | Masatoshi AOKI | Vilma BAYRAMZADEH | Mohammad Taghi AHMADI

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Agriculture and Forestry 2011 Vol.35 Issue 6, pp.597-609

Belge Tipi:

Makale

Yayın Tarihi:

5/2011

Belge Dili:

Türkçe

Document ID (Org No.):

2000808025

Sıklık:

İki Aylık

eISSN:

1303-6173

pISSN:

1300-011X

Anahtar kelimeler:

Özet:

 

Knowledge of vegetation-atmosphere interactions has great importance in ecological research, and to recognize these effective interactions, the collection and interpretation of micrometeorological data are essential. The main goal of this study was to understand the trends of evapotranspiration (ET) and other micrometeorological parameters within the growing season above a Japanese red pine forest in Japan. To measure ET, the Bowen ratio-energy balance approach was employed. These measurements were used with the Penman-Monteith reference evapotranspiration (ET0) in order to create crop coefficients (Kc) by the ratio of ET:ET0. Mean daily ET on the dry and rainy days was found to be 3.22 and 2.11 mm day-1, respectively, which was statistically different. Kc values were inconsistent from day to day and ranged between 0.37 and 1.24, and, in general, were less than unity (average: 0.84, standard error: 0.01). Significant differences in Kc were found between rainy days (wet canopy) and dry days (dry canopy). No remarkable changes were observed between rainy and dry days in the average contribution of latent heat flux, ground heat flux, and sensible heat flux to the energy budget. The data indicated that the Penman-Monteith equation may be useful for estimating the ET from the red pine forest within the growing season, and, in particular, when the rainy and dry days were separated.

 

Knowledge of vegetation-atmosphere interactions has great importance in ecological research, and to recognize these effective interactions, the collection and interpretation of micrometeorological data are essential. The main goal of this study was to understand the trends of evapotranspiration (ET) and other micrometeorological parameters within the growing season above a Japanese red pine forest in Japan. To measure ET, the Bowen ratio-energy balance approach was employed. These measurements were used with the Penman-Monteith reference evapotranspiration (ET0) in order to create crop coefficients (Kc) by the ratio of ET:ET0. Mean daily ET on the dry and rainy days was found to be 3.22 and 2.11 mm day-1, respectively, which was statistically different. Kc values were inconsistent from day to day and ranged between 0.37 and 1.24, and, in general, were less than unity (average: 0.84, standard error: 0.01). Significant differences in Kc were found between rainy days (wet canopy) and dry days (dry canopy). No remarkable changes were observed between rainy and dry days in the average contribution of latent heat flux, ground heat flux, and sensible heat flux to the energy budget. The data indicated that the Penman-Monteith equation may be useful for estimating the ET from the red pine forest within the growing season, and, in particular, when the rainy and dry days were separated.

Makale detayları

Micrometeorological observations above a Japanese red pine forest within the growing season

Yazarlar:

Pedram ATTAROD | Masatoshi AOKI | Vilma BAYRAMZADEH | Mohammad Taghi AHMADI

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Agriculture and Forestry 2011 Vol.35 Issue 6, pp.597-609

Belge Tipi:

Makale

Yayın Tarihi:

5/2011

Belge Dili:

Türkçe

Document ID (Org No.):

2000808025

Sıklık:

İki Aylık

eISSN:

1303-6173

pISSN:

1300-011X

Key words: Bowen ratio-energy balance method

crop coefficient

evapotranspiration

red pine forest

Sayı

Makale detayları

Micrometeorological observations above a Japanese red pine forest within the growing season

Yazarlar: Pedram ATTAROD | Masatoshi AOKI | Vilma BAYRAMZADEH | Mohammad Taghi AHMADI

Yayıncı: TUBITAK

Dergi: Turkish Journal of Agriculture and Forestry 2011 Vol.35 Issue 6, pp.597-609

Belge Tipi: Makale

Yayın Tarihi: 5/2011

Belge Dili: Türkçe

Document ID (Org No.): 2000808025

Sıklık: İki Aylık

eISSN: 1303-6173

pISSN: 1300-011X

Key words: Bowen ratio-energy balance method

crop coefficient

evapotranspiration

red pine forest

Sayı

Yazarlar:

Pedram ATTAROD | Masatoshi AOKI | Vilma BAYRAMZADEH | Mohammad Taghi AHMADI

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Agriculture and Forestry 2011 Vol.35 Issue 6, pp.597-609

Belge Tipi:

Makale

Yayın Tarihi:

5/2011

Belge Dili:

Türkçe

Document ID (Org No.):

2000808025

Sıklık:

İki Aylık

eISSN:

1303-6173

pISSN:

1300-011X