Vertical Profiles of Environmental Factors within Tropical Rainforest, Lambir Hills National Park, Sarawak, Malaysia

スポンサーリンク

概要

• 論文の詳細を見る

• Environmental factors, such as global solar radiation, wind speed, air temperature, humidity, and CO_2 concentration, were measured above and within the canopy of a tropical rainforest in Lambir Hills National Park, Sarawak, Malaysia. Few data concerning the environment of this forest have been reported. Intensive observations were carried out in 1998, 1999, and 2000 with the following results: (1) The fraction of global solar radiation reaching the upper layer of the canopy varied with global solar radiation above the canopy. Even though the global solar radiation above the canopy fluctuated, the fraction of that reaching the lower canopy and the ground was constantly approximately 5%. (2) The fraction of wind speed reaching each layer of the canopy increased with wind speed above the canopy. Little wind was usually present at the lower canopy. (3) The daytime air temperature at the canopy top was higher than that near the ground. The maximum difference between the air temperature at the canopy top and that at the ground was about 5℃, and the diurnal temperature ranges at the canopy top and those at the ground were about 8℃ and about 5℃, respectively. The highest daytime water vapor pressure occurred within the canopy and particularly near the ground. Vertical gradients of water vapor pressure during the day were steep, probably because of high transpiration. (4) In the 1998 observation the minimum and the maximum CO_2 concentrations were 360 ppm in the day 450 ppm at night, while in the 2000 observation the minimum and the maximum CO_2 concentrations were 350 ppn in the day and 540 ppm at night. The higher CO_2 concentration in the daytime and the lower concentration at night observed during the 1998 observation period were probably due to reduced photosynthesis and soil respiration caused by exceptional dry conditions during the observation period.

• 日本森林学会の論文
• 2001-11-16

著者

• SUZUKI Masakazu

  Graduate School of Mathematics, Kyushu University

• Suzuki Masakazu

  Graduate School Of Agricultural And Life Sciences The University Of Tokyo

• Suzuki M

  Graduate School Of Agricultural And Life Sciences The University Of Tokyo

• Kuraji Koichiro

  Interdisciplinary Graduate School of Science and Engineering, Tokyo Institute of Technology

• Tanaka Yuri

  Interdisciplinary Graduste School Of Science And Engineering Tokyo Institute Of Technology

• Noguchi Hironori

  Graduate School of Agricultural and Life Sciences, The University of Tokyo

• Tanaka Katusnori

  Frontier Research System for Global Change

• Noguchi Hironori

  Graduate School Of Agricultural And Life Sciences The University Of Tokyo:forestry And Forest Produc

• Kuraji Koichiro

  Interdisciplinary Graduste School Of Science And Engineering Tokyo Institute Of Technology:graduate

• Kuraji Koichiro

  Interdisciplinary Graduate School Of Science And Engineering Tokyo Institute Of Technology

• Suzuki Masakazu

  Graduate School Of Agricultural And Life Science The University Of Tokyo

• Kumagai T

  University Forest In Miyazaki Kyushu University

• Kuraji Koichiro

  Interdisciplinary Graduate School of Scicnce and Engineerring, Tokyo Institute of Technalogy

関連論文

• Minimum Spanning Tree Problem with Label Selection
• Stream Water Chemistry of University Forests over Japan
• Vertical Profiles of Environmental Factors within Tropical Rainforest, Lambir Hills National Park, Sarawak, Malaysia
• Evapotranspiration Patterns for Tropical Rainforests in Southeast Asia: A Model Performance Examination of the Biome-BGC Model.
• Relationship between Nighttime Wind Speeds and Thermal Conditions above a Sloping Forest
• Seasonal changes in the net radiation/solar radiation ratio above a Cryptomeria japonica plantation forest
• Transpiration of a Cryptomeria japonica plantation in winter : analysis based on one-year sap flow measurements
• Seasonality of vertically partitioned soil CO_2 production in temperate and tropical forest
• Soil respiration and soil CO_2 concentration in a tropical forest, Thailand
• A Model of Equity Prices with Heterogeneous Beliefs
• Altitudinal increase in rainfall in the Mae Chaem watershed, Thailand
• Characteristics of Soil Temperature and Heat Flux within a Tropical Rainforest, Lambir Hills National Park, Sarawak, Malaysia
• Water Resources Observation and Large-scale Model Estimation in Forested Areas in Mekong River Basin
• Relationship between catchment scale and the spatial variability of stream discharge and chemistry in a catchment with multiple geologies
• Circumferential sap flow variation in the trunks of Japanese cedar and cypress trees growing on a steep slope

もっと見る 閉じる

スポンサーリンク