Spatial and temporal emissions of biogenic volatile organic compounds (BVOCs) were estimated over a wide range of Andean ecosystems/ecotones, exhibiting high variability and highlighting the importance of BVOC emissions in the Tropical Andes, as precursors of secondary pollutants, of which the main concern is tropospheric ozone. The biogenic altitudinal gradient (BIGA) model was applied to a 7436-km² area of the Colombian Andes with an altitude ranging from 140 to 5287 m a.s.l. Preliminary results revealed critical points of BVOC emission in lower elevational zones. Isoprene and monoterpene emissions were 41% and 20%, respectively, and were higher on dry days. For both dry and wet, the maximum fluxes occurred at 15:00 hours. Isoprene emissions were also estimated with the Weather Research and Forecasting model coupled to Chemistry (WRF-Chem) model that incorporates the module of Model of Emissions of Gases and Aerosols from Nature version 2.1 (MEGANv2.1). Isoprene comparison between MEGAN-WRF-Chem and BIGA suggests that these models estimate similar emission fluxes (maximum 13,200 μg m⁻² h⁻¹) on the same regions. However, the BIGA model was able to estimate higher-resolution flux and indicated the importance to resolve in mountain zones the altitude effect on BVOC emission. The BIGA model requires information from surface temperature and solar radiation (SR), a digital elevation model (DEM), and land cover and use (LCU) maps. This local information was processed at a resolution of 90 m × 90 m. The basic algorithm proposed by Guenther et al. (Journal of Geophysical Research 98:12609–12617, 1993) was implemented in the BIGA model using Matlab; the results were visualized with ArcGIS. In the Tropical Andes, small areas can be characterized by many distinct climactic zones that range from grasslands to mountain forests and paramo impacting BVOC emission rates and spatial distribution. Preliminary results show that the BIGA model adequately incorporated the strong Andean altitudinal gradient and differs from the global model MEGAN-WRF-Chem.

据估计，在广泛的安第斯生态系统/生态系统中，生物挥发性有机化合物（BVOCs）的时空排放表现出高度的可变性，并突出了作为次要污染物前体的热带安第斯山脉中BVOC排放的重要性。是对流层臭氧。将生物高度梯度（BIGA）模型应用于7436-km ²哥伦比亚安第斯山脉地区海拔140至5287 m asl初步结果显示，较低海拔地区的BVOC排放临界点。异戊二烯和单萜的排放量分别为41％和20％，并且在干旱天更高。对于干湿两用，最大通量都出现在15:00小时。异戊二烯的排放量还通过结合化学的天气研究和预报模型（WRF-Chem）进行了估算，该模型纳入了自然版2.1（MEGANv2.1）的气体和气溶胶排放模型。MEGAN-WRF-Chem和BIGA之间的异戊二烯比较表明，这些模型估计了相似的排放通量（最大13,200μgm ^-2  h ^-1）在同一地区。但是，BIGA模型能够估算出更高分辨率的通量，并表明了解决山区海拔对BVOC排放的影响的重要性。BIGA模型需要以下信息：地表温度和太阳辐射（SR），数字高程模型（DEM）以及土地覆盖和使用（LCU）地图。以90 m×90 m的分辨率处理此本地信息。Guenther等人提出的基本算法。（地球物理研究杂志98：12609–12617，1993）是使用Matlab在BIGA模型中实现的；结果通过ArcGIS可视化。在热带安第斯山脉中，小区域的特征是有许多不同的高潮区，从草原到山地森林，以及对BVOC排放速率和空间分布产生影响的极端气候。初步结果表明，BIGA模型充分吸收了强的安第斯海拔梯度，并且不同于整体模型MEGAN-WRF-Chem。