GLORIA Chemistry Mode temperature and trace gas retrievals from the POLSTRACC/GW-LCYCLEII/GWEX/SALSA campaigns 2015/2016

The Gimballed Limb Observer for Radiance Imaging of the Atmosphere (GLORIA) was operated on board the German High Altitude and Long Range Research Aircraft (HALO) during the PGS (POLSTRACC/GW-LCYCLE/SALSA) aircraft campaigns in the Arctic winter 2015/2016. Research flights were conducted from 17 December 2015 until 18 March 2016 within 25–87°N, 80°W–30°E. From the GLORIA infrared limb-emission measurements, two-dimensional cross sections of temperature, HNO3, O3, ClONO2, H2O and CFC-12 are retrieved. During 15 scientific flights of the PGS campaigns the GLORIA instrument measured more than 15000 atmospheric profiles at high spectral resolution. Dependent on flight altitude and tropospheric cloud cover, the profiles retrieved from the measurements typically range between 5 and 14km, and vertical resolutions between 400 and 1000m are achieved. The estimated total (random and systematic) 1σ errors are in the range of 1 to 2K for temperature and 10% to 20% relative error for the discussed trace gases.

本数据集配套的大气辐射成像万向支架式临边观测仪（Gimballed Limb Observer for Radiance Imaging of the Atmosphere，GLORIA），于2015/2016年北极冬季的PGS（POLSTRACC/GW-LCYCLE/SALSA）航空科考任务期间，搭载于德国高空远程研究飞机（HALO）开展观测。本次科考飞行时段为2015年12月17日至2016年3月18日，观测覆盖纬度25°N至87°N、经度80°W至30°E的空域范围。基于GLORIA获取的红外临边发射光谱测量数据，研究团队反演得到温度、硝酸（HNO3）、臭氧（O3）、氯硝酰（ClONO2）、水汽（H2O）以及二氯二氟甲烷（CFC-12，俗称氟利昂-12）的二维截面分布。在PGS科考任务的15架次科学飞行中，GLORIA仪器以高光谱分辨率完成了超过15000条大气廓线的观测。根据飞行高度及对流层云量的差异，反演得到的大气廓线通常分布于5km至14km的高度区间，垂直分辨率可达400m至1000m。经估算，总误差（随机误差与系统误差之和）的1σ不确定度范围为：温度误差为1~2K，所涉痕量气体的相对误差为10%~20%。