CCN-100 - MAP-IO - STATION LEVEL 0

The objective of the MAP-IO program is to assess the feasibility of building an atmospheric and marine biology observatory on board the Marion Dufresne. This observatory aims to carry out atmospheric observations at the ocean-atmosphere interface and integrated on the atmospheric column over the entire globe with a focus of particular interest for the study of the Indian and Southern Oceans. The MAP-IO program is positioned in an observatory logic with four main objectives; (i) integration into international atmospheric and oceanic networks by providing high quality data on a region devoid of permanent observation, (ii) validating and calibrating space sensors and numerical weather forecasting models, (iii) monitoring global changes on the Indian and Southern Ocean and (iv) observation of atmospheric and biology phytoplankton variability over the Indian and Southern Oceans.

MAP-IO takes advantage of the scientific campaigns at sea planned by the FOF by exploring different poorly documented ocean areas and by increasing and completing the observation systems of the programs with additional measurements. The differentiation value of MAP-IO versus conventional scientific programs at sea, and that it relies on the regular rotations of the TAAFs by documenting the atmosphere and the ocean surface state over a wide variability of sea ​​and latitude conditions. These multi-year observations of the Indian and Southern Oceans make it possible to uniquely document the trends, the mechanisms of ocean-atmosphere exchanges and the atmospheric composition on a seasonal and interannual basis.

CCN: a cloud condensation nuclei chamber (model DMP CCN-100) counts and sizes aerosols that can be activated into cloud droplets. Aerosols enter into a thermal-gradient diffusion chamber where a supersaturated water vapor condition is created by the difference in diffusion rates between water vapor and heat. Then the cloud droplets formed are counted and sized using an optical light-scattering counter (range 750 nm to 10 µm). The CCN-100 scans the CCN aerosols properties at various supersaturations ranging from 0.07% to 2 %.

STATION LEVEL 0 corresponds to raw data.

Use pollution flags to avoid risks of local pollution from the ship.

MAP-IO计划的目标是评估在马里恩·迪弗雷纳号（Marion Dufresne）科考船上搭建大气与海洋生物观测站的可行性。该观测站旨在开展全球范围内海-气界面及整层大气柱的大气观测，研究重点聚焦印度洋与南大洋。
MAP-IO计划遵循观测站研究范式，包含四大核心目标：(i) 通过在缺乏长期观测的区域提供高质量数据，融入国际大气与海洋观测网络；(ii) 验证并校准空间传感器与数值天气预报模式；(iii) 监测印度洋与南大洋的全球变化；(iv) 观测印度洋与南大洋的大气及浮游植物生物变异性。
MAP-IO依托FOF规划的海上科学航次，通过探索鲜有观测记录的不同海域，并补充额外测量数据以完善相关项目的观测系统。相较于传统海上科学项目，MAP-IO的差异化优势在于其依托TAAFs的定期轮换，能够在多样的海况与纬度条件下完成大气与海洋表层状态的观测记录。这些针对印度洋与南大洋的多年连续观测，可在季节与年际尺度上，独特地记录海-气交换机制、大气成分及其变化趋势。
CCN：云凝结核舱（cloud condensation nuclei chamber，CCN）型号为DMP CCN-100，可对可被激活为云滴的气溶胶进行计数与粒径表征。气溶胶进入热梯度扩散室，该室通过水蒸气与热量的扩散速率差异营造出过饱和水蒸气环境。随后利用光学光散射计数器（量程750 nm至10 µm）对形成的云滴进行计数与粒径测定。DMP CCN-100可在0.07%至2%的不同过饱和度下，扫描云凝结核气溶胶的特性。
STATION LEVEL 0 对应原始数据。
请使用污染标记以规避船舶带来的局部污染风险。

搜集汇总

背景与挑战

背景概述

该数据集是MAP-IO项目的一部分，使用CCN-100仪器测量云凝结核（CCN）的浓度和大小，数据级别为L0（原始数据）。数据集旨在通过Marion Dufresne船上的观测活动，填补印度洋和南大洋地区的大气和海洋观测空白。