Cloud occurrence and layering at Arctic atmospheric observatories: Summit, Greenland

This data set contains cloud occurrence and layering data for Summit, Greenland. Cloud occurrence fraction determines the first order impact of clouds on the climate system. This collection of data sets documents cloud occurrence and, to the degree possible, cloud vertical distribution at multiple locations across the Arctic. Observations are based on the available surface-based, remote-sensor measurements. From this perspective, the definition used here for cloud presence is based on the ability for remote-sensors to detect hydrometeors in the atmosphere. While an attempt has been made to maintain a consistent definition of cloud occurrence across the many observatories, each has a unique set of cloud observations instruments.

本数据集包含格陵兰萨米特（Summit）站点的云出现情况与云分层数据。云出现占比决定了云对气候系统的一级影响。本数据集集合记录了北极多个观测点位的云出现情况，并在可行范围内同步记录了云的垂直分布特征。观测数据基于现有地面遥感传感器的测量结果。基于此界定视角，本文中云存在的定义以遥感传感器能否检测到大气中的水凝物为依据。尽管已尽力在多个观测台站间维持统一的云出现定义，但各台站均配备了独特的云观测仪器组合。