Emission inventories are an essential tool for harbour authorities to assess the impacts of harbour-related activities and to assess the effectiveness of mitigation measures. In this paper, two bottom-up methodologies (EMEP/EEA and US/SCG) are applied to the Port of Leixões, Portugal, to develop an emission inventory for harbour-related activities, accounting for both the emissions from shipping and the cargo handling equipment. Emission estimates obtained from the two methodologies are compared and discussed. Regarding shipping emissions, the main disparities between the two methodologies arise from the differences in emission factors and application (or not) of fuel correction factors. Among the considered pollutants, EMEP/EEA methodology estimates higher total emissions (for all types of ship combined) of SO_X, NO_X, VOC, PM_2.5, PM₁₀, CH₄, HC, CO and CO₂ (up to 46%), and lower emission of only N₂O (up to 7%), comparing to US/SCG. Regarding CHE emissions, only EMEP/EEA methodology considers the deterioration factors adjustment, while the fuel correction factor is only considered for US/SCG methodology. Different emission factors also contribute to the observed differences in CHE emissions estimates, leading to higher total emissions (for all CHE combined) of NO_X, CO, N₂O, PM_2.5, PM₁₀, SO_X and CO₂ (up to 85%), and lower emission of only CH₄ (264%), comparing to US/SCG. This paper provides a highly relevant approach to estimate CHE-related emissions in European ports and highlights the importance for a standardized methodology to estimate emissions from harbour activities, contributing not only to improve the scientific knowledge but also to provide support to harbour authorities, regarding the quantification of harbour’s environmental performance and the definition of mitigation measures.

排放清单是港口当局评估与港口有关的活动的影响并评估缓解措施的有效性的重要工具。在本文中，两种自下而上的方法（EMEP / EEA和US / SCG）被应用于葡萄牙的Leixões港口，以开发与港口相关的活动的排放清单，同时考虑到来自运输和货物处理的排放设备。比较和讨论了从两种方法获得的排放估算。关于船舶排放，两种方法之间的主要差异是由排放因子和燃料校正因子的应用（或不应用）的差异引起的。在考虑的污染物中，EMEP / EEA方法估算出SO _X的总排放量（对于所有类型的船舶）与US / SCG相比，NO _X，VOC，PM _2.5，PM ₁₀，CH ₄，HC，CO和CO ₂（高达46％），仅N ₂ O的排放较低（高达7％）。关于CHE排放，仅EMEP / EEA方法考虑了劣化因子的调整，而燃料校正因子仅针对US / SCG方法。不同的排放因子也会导致所观察到的CHE排放估算值的差异，从而导致NO _X，CO，N ₂ O，PM _2.5，PM ₁₀，SO _X和CO _2的总排放量更高（对于所有CHE组合）（高达85％），与US / SCG相比，仅排放CH ₄（264％）较低。本文提供了一种高度相关的方法来估算欧洲港口中与CHE有关的排放，并强调了采用标准化方法估算港口活动排放的重要性，这不仅有助于提高科学知识，而且还为港口当局提供了有关以下方面的支持：量化海港的环境绩效并确定缓解措施。