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Tropical Forestry
2016,44
(4)
48-52+47
热带滨海砂土植被与大气通量监测初报
作 者：
薛杨;杨众养;宿少锋;王小燕;林之盼;赵俊福;谭正洪
单 位：
海南大学环境科学系;海南省林业科学研究所
关键词：
滨海砂土;涡度相关技术;通量贡献区;夜间通量低估
摘 要：
为了深入研究滨海砂土植被的结构和功能,兼顾探索航天活动对当地环境和生态系统的影响,对热带滨海砂土植被开展了定位观测研究。以涡度相关系统、辐射仪以及各种小气候和土壤监测设备组成综合观测塔,对生态系统的物质和能量交换通量进行了监测。监测期内(2015年12月~2016年6月)热带滨海砂土植被是一个碳汇,平均碳汇强度约为1.90(或1.98)g C day~(-1);涡度通量监测系统的能量闭合度约为75%,不闭合的部分极有可能是因为辐射仪与涡度通量的贡献区不同所致;夜间通量低估数据的比重不高,大约占20%左右,进行u*-filtering对碳通量的估计影响不大;昼间和夜间碳通量分别对辐射强度和温度有较强的依赖性。
译 名：
A preliminary report on mass and energy flux over a coastal vegetation in Hainan Island
作 者：
Xue Yang;Yang ZhongYang;Su ShaoFeng;Wang XiaoYan;Lin zhipan;Zhao JunFu;Tan ZhengHong;Hainan Forestry Insititute;Ecology Program,Department of Environmental Science,Hainan University;
关键词：
Coastal sandy soil;;Eddy covariance technique;;Flux source area;;Nighttime flux underestimation
摘 要：
The costal sandy soil vegetation plays important role in coast protection, agriculture,forestry and even astronautic purpose.A well investigation on vegetation structure and function of this ecosystem is subsequently important.We therefore carried out long-term monitoring on this kind of vegetaiton.A micrometeorological tower was established with eddy covariance system,radiometer, microclimatic sensors, and soil physical properties sensors instrumented on it.The ecosystem serve as a carbon sink around 1.9 g C day-1during the period of observation(December 2015~June 2016). The mean energy balance closure is around 75%.The possible reason for the un-closure is different footprint of radiometer and eddy covariance system.Nighttime underestimation plays a slight role in the study site. Implementation of u*-filtering have limited effect on net carbon budget.A daytime and nighttime carbon flux was dependent on light intensity and temperature,respectively.
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