温室气体是导致全球气候变暖的主要原因之一，通过观测它们在大气中的浓度，可以更好地理解气候变化的趋势。温室气体分析仪（LGR-ICOS，ABB Inc.）采用最新的离轴积分腔输出光谱技术（OA-ICOS）能够精确、准确、快速地测量环境空气中的CH4、CO2和H2O浓度。

Greenhouse gases are one of the main causes of global warming. By observing their concentrations in the atmosphere, we can better understand the trends of climate change. The greenhouse gas analyzer (LGR-ICOS, ABB Inc.) uses the latest Off-Axis Integrated Cavity Output Spectroscopy (OA-ICOS) technology to accurately, precisely, and quickly measure the concentrations of CH4, CO2, and H2O in ambient air.

番禺站温室气体浓度周分析结果
The weekly analysis results of greenhouse gas concentrations at the PYU Station.

TH-300B大气挥发性有机物快速在线监测系统采用超低温空管捕集技术与气相色谱-质谱联用（GC-MS）检测技术，应用于在线监测环境空气中痕量挥发性有机物的浓度。它的测量范围涵盖PAMS物质（Photochemical Assessment Monitoring Stations，美国EPA光化学评估监测体系规定的56种臭氧前驱物，部分TO15物质、卤代烃及OVOCs

The TH-300B rapid on-line monitoring system for atmospheric volatile organic compounds (VOCs) is applied to on-line monitoring the concentration of trace VOCs in ambient air by using ultra-low temperature empty tube trapping technology and gas chromatogram-mass spectrometry (GC-MS) detection technology. Its measurement range covers PAMS substances (Photochemical Assessment Monitoring Stations), 56 ozone precursors specified by the EPA photochemical Assessment Monitoring System, some TO15 substances, halocarbons and OVOCs.

广州各季节全谱VOCs（NMHCs + OVOCs）的组分比例
The composition ratios of the full spectrum of VOCs (NMHCs + OVOCs) in Guangzhou in different seasons

高分辨率差分电迁移率分析仪（HRDMA）通过优化 DMA 的内部几何构造和提升 DMA 加工精度，以显著提升鞘流流速，并确保 DMA 粒径筛分区域在鞘流的雷诺数大于 10000时仍然保持层流。相对于传统 DMA，HRDMA 的显著特点包括鞘流在超临界状态下工作，缩小粒径筛分的工作距离，适当提升样流流速以减少粒子在 DMA 中的停留时间和扩散损失等，可以对更小粒径的粒子进行分析。

The High-Resolution Differential Mobility Analyzer (HRDMA) significantly enhances sheath flow rate by optimizing the internal geometry and improving the manufacturing precision of the DMA. It ensures that the particle size selection region of the DMA maintains laminar flow even when the Reynolds number of the sheath flow exceeds 10,000. Compared to traditional DMAs, the notable features of the HRDMA include operating the sheath flow in a supercritical state, reducing the working distance for particle size selection, and appropriately increasing the sample flow rate to minimize particle residence time and diffusion losses within the DMA. These improvements allow for the analysis of smaller particle sizes.

纳米粒子的电迁移率分析结果

气溶胶化学组成在线监测仪（ACSM）能够实时并直接地定量测量 PM1 (<1µm)气溶胶中非难熔性组分（简称: NR-PM1）的质量浓度和化学组成，包括有机物、硫酸盐、硝酸盐、氨盐和氯离子。通过对有机气溶胶质谱进行正矩阵因子解析(PMF等), 可以区分和得到不同种类的有机气溶胶，包括HOA（烃类有机物，主要为一次燃烧源排放），OOA（氧化态有机物，主要为二次有机气溶胶）和BBOA（生物质燃烧示踪物）等。

The Aerosol Chemical Speciation Monitor (ACSM) measures aerosol mass and chemical composition of non-refractory submicron aerosol particles in real-time. It provides composition information for particulate ammonium, nitrate, sulfate, chloride, and organics. In addition, the time series collection of mass spectra can be processed using multivariate factor analysis methods (such as Positive Matrix Factorization – PMF) to extract chemically distinct groups, including HOA (hydrocarbon organic aerosols, primarily emitted from primary combustion sources), OOA (oxidized organic aerosols, primarily from secondary organic aerosols), and BBOA (biomass burning tracers).

广州番禺大气成分站全年及各季节NR-PM1中化学组分分析结果不同季节有机气溶胶、硫酸盐和硝酸盐的概率分布。
The average mass fractions of the chemical components in NR-PM1 of the entire year and different seasons and the probability distributions of OA, sulfate (SO4) and nitrate (NO3) in different seasons.