Response of CO 2 and H 2 O fluxes of a mountainous tropical rain forest in equatorial Indonesia to El Niño events
Response of CO 2 and H 2 O fluxes of a mountainous tropical rain forest in equatorial Indonesia to El Niño events
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赤道印度尼西亚山地热带雨林CO 2 和H 2 O通量对厄尔尼诺事件的响应
DOI：
10.5194/bg-12-6655-2015
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发表时间：
2015
期刊：
影响因子：
4.9
通讯作者：
A. Knohl
中科院分区：
文献类型：
--
作者：
A. Olchev;A. Ibrom;O. Panferov;D. Gushchina;H. Kreilein;V. Popov;P. Propastin;T. June;A. Rauf;G. Gravenhorst;A. Knohl
抽象的。研究了厄尔尼诺-南方涛动（ENSO）事件对热带雨林与大气之间CO2和H2O通量主要分量的可能影响。通量连续测量在一个古老的山地热带雨林中苏拉威西岛在印度尼西亚使用涡度协方差法期间，从2004年1月至2008年6月。在此期间，观测到两次厄尔尼诺和一次拉尼娜。这些ENSO事件都是中等强度的，属于中太平洋型。对热带雨林主要气象参数和CO2、H2O交换分量的时间变化分析表明，热带雨林蒸散量（ET）和初级生产总值（GPP）对厄尔尼诺和拉尼娜事件引起的气象变化具有很高的敏感性。入射太阳辐射是导致ET和GPP变化的主要控制因素。生态系统呼吸（RE）动力学主要依赖于气温变化，对ENSO几乎不敏感。由于温和的ENSO事件的降水变化没有任何显着的影响ET和GPP，主要是因为足够的土壤水分条件，即使在该地区的降水异常减少的时期。
Abstract. The possible impact of El Nino–Southern Oscillation (ENSO) events on the main components of CO2 and H2O fluxes between the tropical rainforest and the atmosphere is investigated. The fluxes were continuously measured in an old-growth mountainous tropical rainforest in Central Sulawesi in Indonesia using the eddy covariance method for the period from January 2004 to June 2008. During this period, two episodes of El Nino and one episode of La Nina were observed. All these ENSO episodes had moderate intensity and were of the central Pacific type. The temporal variability analysis of the main meteorological parameters and components of CO2 and H2O exchange showed a high sensitivity of evapotranspiration (ET) and gross primary production (GPP) of the tropical rainforest to meteorological variations caused by both El Nino and La Nina episodes. Incoming solar radiation is the main governing factor that is responsible for ET and GPP variability. Ecosystem respiration (RE) dynamics depend mainly on the air temperature changes and are almost insensitive to ENSO. Changes in precipitation due to moderate ENSO events did not have any notable effect on ET and GPP, mainly because of sufficient soil moisture conditions even in periods of an anomalous reduction in precipitation in the region.
影响因子：
30.7
作者：
Cai, Wenju;Wang, Guojian;Guilyardi, Eric
通讯作者：
Guilyardi, Eric