Influence of disturbances and environmental changes on albedo in tropical peat ecosystems
Influence of disturbances and environmental changes on albedo in tropical peat ecosystems
复制标题
干扰和环境变化对热带泥炭生态系统反照率的影响
DOI：
10.1016/j.agrformet.2021.108348
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发表时间：
2021
影响因子：
6.2
通讯作者：
Kusin Kitso
中科院分区：
文献类型：
--
作者：
Ohkubo Shinjiro;Hirano Takashi;Kusin Kitso
热带泥炭沼泽森林一直在经历剧烈的干扰，如砍伐森林，排水和火灾。我们研究了这种扰动如何影响调节地表和大气之间辐射能量交换的辐射能。我们进行了连续的实地观测在三个地点：不排水的森林（UF），排水森林（DF），和排水烧毁前森林（DB），在加里曼丹中部，印度尼西亚，超过13 years。在2015年10月的严重雾霾条件下，UF、DF和DB站点的表观可吸入颗粒物分别增加到0.156、0.162和0.183。在UF、DF和DB研究中心，不包括火灾期的月平均辐射剂量分别为0.094 ± 0.005、0.092 ± 0.006和0.099 ± 0.017（平均值± 1个标准差）。在以蕨类植物为主的DB站，反照率的季节波动大于UF和DF站，DF站的反照率在2 - 8月显著低于UF站（p< 0.05）。在森林网站的地下水位下降，增加了水的。反照率较高的高蒸汽压赤字在所有网站。在DB现场，当土壤表面被水饱和并被水坑修补时，可能由于开放水域的低渗透性，渗透性降低。在DB站点中的BLONDO是低于在森林站点在观察期开始。随后，在2009年火灾后不久，火灾发生率上升并超过了UF和DF场地。这可以用深色泥炭土上鲜艳的蕨类植物和莎草的扩张来解释。根据我们的研究结果，烟霾，地下水位，植被覆盖显着影响在热带泥炭沼泽森林中的植被。
Tropical peat swamp forests have been experiencing drastic disturbances, such as deforestation, drainage, and fire. We examined how such disturbances influence albedo, which regulates radiative energy exchange between the terrestrial surface and the atmosphere. We conducted continuous field observations at three sites: undrained forest (UF), drained forest (DF), and drained burned ex-forest (DB), in Central Kalimantan, Indonesia, for over 13 years.Observed albedo was strongly influenced by haze caused by fire because the haze layer covering the canopy has a relatively high reflectance. Under severe haze conditions in October 2015, apparent albedo increased to 0.156, 0.162, and 0.183 at the UF, DF, and DB sites respectively. Mean monthly albedos excluding fire periods were 0.094 ± 0.005, 0.092 ± 0.006, and 0.099 ± 0.017 (mean ± 1 standard deviation) at the UF, DF, and DB sites respectively. Seasonal fluctuation in albedo at the DB site, where ferns were dominant, was greater than at the UF and DF sites.Albedo at the DF site was significantly lower than that at the UF site from February to August (p< 0.05). At the forest sites the albedo increased as groundwater level decreased. Albedo was higher under high vapor pressure deficit at all sites. At the DB site albedo decreased when the soil surface was water-saturated and patched with puddles, potentially due to the low albedo of open water. The albedo at the DB site was lower than that at the forest sites at the beginning of the observation period. Subsequently, the albedo increased and exceeded those at the UF and DF sites immediately after fire damage in 2009. This could be explained by the expansion of bright-colored ferns and sedges over dark-colored peat soil. According to our results, haze, groundwater level, and vegetation cover significantly influence albedo in tropical peat swamp forests.