EPCAPE-PT-LANL Measurements: Gas Monitors

Coastal cities offer a unique environment for studying aerosol-cloud interactions and the effects of urban emissions on cloud properties. As part of the Eastern Pacific Cloud Aerosol Precipitation Experiment (EPCAPE), the Partitioning Thrust by Los Alamos National Laboratory (EPCAPE-PT-LANL) was conducted. Our campaign focused on measuring the optical and chemical properties of aerosols and their interactions within marine stratocumulus clouds in La Jolla, California. EPCAPE-PT-LANL enhances the primary goals of EPCAPE through innovative observations of vapor-phase transitions between aerosols and cloud droplets, the impact of black carbon on aerosol-cloud dynamics, and the effects of cloud processing on aerosol optical properties. Instrument: G2401 Gas Concentration Analyzer (Picarro)Data Notes: The Picarro G2401 gas concentration analyzer provides simultaneous, precise measurement of carbon monoxide (CO), carbon dioxide (CO2), methane (CH4) at parts-per-billion (ppb), and water (H2O) vapor at parts per-million (ppm) sensitivity with negligible drift for atmospheric science, air quality, and emissions quantification. Header: - CO[ppm]: Concentration of carbon monoxide (CO) measured at the time of sampling, expressed in parts per million (ppm). - CO2[ppm]: Concentration of carbon dioxide (CO2) measured at the time of sampling, expressed in parts per million (ppm). - CH4[ppm]: Concentration of methane (CH4) measured at the time of sampling, expressed in parts per million (ppm). - H2O[%]: Water vapor content in the air at the time of the measurement, expressed as a percentage

沿海城市为研究气溶胶-云相互作用以及城市排放对云特性的影响提供了独特的研究环境。作为东太平洋云气溶胶降水实验（Eastern Pacific Cloud Aerosol Precipitation Experiment, EPCAPE）的一部分，洛斯阿拉莫斯国家实验室开展了分区推力实验（Partitioning Thrust by Los Alamos National Laboratory, EPCAPE-PT-LANL）。本次观测计划聚焦于美国加利福尼亚州拉霍亚海域海洋层积云内气溶胶的光学与化学特性，及其相互作用的测量工作。EPCAPE-PT-LANL通过针对气溶胶与云滴间气相转变、黑碳对气溶胶-云动力学的影响，以及云处理过程对气溶胶光学特性的作用开展创新性观测，强化了EPCAPE的核心研究目标。

所用仪器为Picarro公司生产的G2401气体浓度分析仪（G2401 Gas Concentration Analyzer, Picarro）。
数据说明：Picarro G2401气体浓度分析仪可同时精准测量一氧化碳（CO）、二氧化碳（CO₂）、甲烷（CH₄）（检测灵敏度达十亿分之一（ppb）级别）以及水汽（H₂O）（检测灵敏度达百万分之一（ppm）级别），且在大气科学、空气质量及排放量化研究中具备极低的漂移率。

字段说明：
- CO[ppm]：采样时刻测得的一氧化碳（CO）浓度，以百万分之一（ppm）为单位
- CO₂[ppm]：采样时刻测得的二氧化碳（CO₂）浓度，以百万分之一（ppm）为单位
- CH₄[ppm]：采样时刻测得的甲烷（CH₄）浓度，以百万分之一（ppm）为单位
- H₂O[%]：测量时刻空气中的水汽含量，以百分比形式表示