4.2.1 Site Description
Beijing, the capital of China, is one of the oldest and fastest developing capital cities in the world. It has a population of 16.33 million and a built-up area of 873 km2 (Beijing Statistics Yearbook 2007). This study was conducted in the Beijing Teaching Botanical Garden, which covers an area of 11.65 x 104 m2 and is in the Chongwen District in the center of Beijing. Beijing, situated in a warm temperate zone, has a typical continental monsoon climate. Mean annual precipitation is about 585.8 mm with more than 70 % of the annual total occurring between July and August. Mean annual temperature is about 11.8 °C, varying between 11 and 12 °C.
|
Year |
Tree number |
DBH (cm) |
Height (m) |
Sapwood area (cm2) |
LAI |
Orientation of sensor |
Number of sensors |
|
2008 |
No. 1 |
17 |
5.9 |
163.56 |
2.07 |
South, north |
2TDP30 |
|
No. 2 |
16.2 |
5.7 |
147.52 |
2.36 |
South, north |
2TDP30 |
|
|
No. 3 |
18.7 |
5.8 |
200.60 |
2.82 |
South, north |
2TDP30 |
|
|
2009 |
No. 1 |
17.1 |
5.9 |
165.63 |
1.79 |
South, north |
2TDP30 |
|
No. 2 |
17.55 |
5.7 |
175.10 |
2.08 |
South, north |
2TDP30 |
|
|
No. 3 |
20.3 |
5.8 |
239.17 |
2.23 |
South, north |
2TDP30 |
|
LAI, leaf area index |
4.2.2 Estimation of Sapwood Cross-Sectional Area,
