Expansion of oil palm and other cash crops causes an increase of the land surface temperature in the Jambi province in Indonesia
Expansion of oil palm and other cash crops causes an increase of the land surface temperature in the Jambi province in Indonesia
复制标题
油棕和其他经济作物的扩张导致印度尼西亚占碑省地表温度升高
DOI：
10.5194/bg-14-4619-2017
复制
发表时间：
2017
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：
C. Sabajo;G. Maire;T. June;A. Meijide;O. Roupsard;A. Knohl
抽象的。由于油棕榈种植园和其他经济作物的大规模扩张取代了森林，印度尼西亚目前是世界上地表转化率最高的区域之一。土地覆盖变化改变了地表属性，直接影响地表温度(LST)，而LST是许多生态功能的关键驱动因素。尽管印尼进行了大规模的历史性土地改造，转向油棕榈树和其他经济作物，政府也计划在未来进行扩张，但这是迄今为止第一项量化土地改造对印尼LST影响的研究。我们从陆地卫星图像的热波段分析了地表温度，并为印度尼西亚苏门答腊岛的占比省的低地制作了高分辨率的地表温度图(30 m)，该地区在过去的几十年里经历了向油棕榈树和其他经济作物的大规模土地转变。通过对7种不同土地覆盖类型(森林、城市、林地、幼龄和成熟油棕榈林、相思树和橡胶林)的地表温度、反照率、归一化植被指数(NDVI)和蒸散量(ET)的比较，表明森林具有较低的地表温度，表明森林退耕还林后存在局部变暖效应。林地与林地LST差异达10.1 ± 2.6 °C(平均 ± SD)。表面温度的差异可以用蒸发冷却效应来解释，蒸发冷却效应抵消了反照率变暖效应。我们基于MODIS数据对过去16年的地表温度趋势进行了分析，结果表明，占比省白天的平均地表温度上升了1.05 °C，这与观测到的土地覆盖变化趋势一致，超过了气候变暖的影响。这项研究提供了证据，表明油棕榈种植园和其他经济作物的扩张导致了生物物理变量的变化，使地表变暖，从而加剧了气候变化导致的气温上升。
Abstract. Indonesia is currently one of the regions with the highest transformation rate of land surface worldwide related to the expansion of oil palm plantations and other cash crops replacing forests on large scales. Land cover changes, which modify land surface properties, have a direct effect on the land surface temperature (LST), a key driver for many ecological functions. Despite the large historic land transformation in Indonesia toward oil palm and other cash crops and governmental plans for future expansion, this is the first study so far to quantify the impacts of land transformation on the LST in Indonesia. We analyze LST from the thermal band of a Landsat image and produce a high-resolution surface temperature map (30 m) for the lowlands of the Jambi province in Sumatra (Indonesia), a region which suffered large land transformation towards oil palm and other cash crops over the past decades. The comparison of LST, albedo, normalized differenced vegetation index (NDVI) and evapotranspiration (ET) between seven different land cover types (forest, urban areas, clear-cut land, young and mature oil palm plantations, acacia and rubber plantations) shows that forests have lower surface temperatures than the other land cover types, indicating a local warming effect after forest conversion. LST differences were up to 10.1 ± 2.6 °C (mean ± SD) between forest and clear-cut land. The differences in surface temperatures are explained by an evaporative cooling effect, which offsets the albedo warming effect. Our analysis of the LST trend of the past 16 years based on MODIS data shows that the average daytime surface temperature in the Jambi province increased by 1.05 °C, which followed the trend of observed land cover changes and exceeded the effects of climate warming. This study provides evidence that the expansion of oil palm plantations and other cash crops leads to changes in biophysical variables, warming the land surface and thus enhancing the increase of the air temperature because of climate change.
影响因子：
4.9
作者：
Bathiany, S.;Claussen, M.;Gayler, V.
通讯作者：
Gayler, V.