Investigating Wintertime Cloud Microphysical Properties and Their Relationship to Air Mass Advection at Ny-Ålesund, Svalbard Using the Synergy of a Cloud Radar–Ceilometer–Microwave Radiometer

Remote Sensing

Baek-Min Kim¹  Sang-Jong Park²  Joo-Hong Kim²  Sang-Yoon Jun²  Yeonsoo Cho³  Huidong Yeo³  Jihyun Nam³  Sang-Woo Kim³ 

[1] Department of Environmental Atmospheric Sciences, Pukyong National University, Busan 48513, Korea;Korea Polar Research Institute, Incheon 21990, Korea;School of Earth and Environmental Sciences, Seoul National University, Seoul 08826, Korea;

关键词: Arctic clouds;    cloud microphysical properties;    air mass advection;    cloud radar;    Ny-Ålesund;   

DOI  :  10.3390/rs13132529

来源: DOAJ

【 摘 要 】

This study investigates the relationship of cloud properties and radiative effects with air mass origin during the winter (November–February, 2016–2020) at Ny-Ålesund, Svalbard, through a combination of cloud radar, ceilometer, and microwave radiometer measurements. The liquid cloud fraction (CF) was less than 2%, whereas the ice CF predominantly exceeded 10% below 6 km. The liquid water content (LWC) of mixed-phase clouds (LWC_mix), which predominantly exist in the boundary layer (CF_mix: 10–30%), was approximately four times higher than that of liquid clouds (LWC_liq). Warm air mass advection (warm_adv) cases were closely linked with strong southerly/southwesterly winds, whereas northerly winds brought cold and dry air masses (cold_adv) to the study area. Elevated values of LWC and ice water content (IWC) during warm_adv cases can be explained by the presence of mixed-phase clouds in the boundary layer and ice clouds in the middle troposphere. Consistently, the r_e of ice particles in warm_adv cases was approximately 5–10 μm larger than that in cold_adv cases at all altitudes. A high CF and cloud water content in warm_adv cases contributed to a 33% (69 W m⁻²) increase in downward longwave (LW) fluxes compared to cloud-free conditions.

【 授权许可】

Unknown