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
| Autor: | Sang Woo Kim, Baek-Min Kim, Jihyun Nam, Sang-Yoon Jun, Yeonsoo Cho, Joo-Hong Kim, Sang-Jong Park, Huidong Yeo |
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| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
010504 meteorology & atmospheric sciences
Arctic clouds Advection cloud radar Science Microwave radiometer Cloud fraction 010502 geochemistry & geophysics Atmospheric sciences 01 natural sciences Ceilometer Troposphere Warm front Liquid water content cloud microphysical properties General Earth and Planetary Sciences Environmental science Ny-Ålesund air mass advection Air mass 0105 earth and related environmental sciences |
| Zdroj: | Remote Sensing, Vol 13, Iss 2529, p 2529 (2021) |
| ISSN: | 2072-4292 |
| Popis: | 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 (LWCmix), which predominantly exist in the boundary layer (CFmix: 10–30%), was approximately four times higher than that of liquid clouds (LWCliq). Warm air mass advection (warmadv) cases were closely linked with strong southerly/southwesterly winds, whereas northerly winds brought cold and dry air masses (coldadv) to the study area. Elevated values of LWC and ice water content (IWC) during warmadv cases can be explained by the presence of mixed-phase clouds in the boundary layer and ice clouds in the middle troposphere. Consistently, the re of ice particles in warmadv cases was approximately 5–10 μm larger than that in coldadv cases at all altitudes. A high CF and cloud water content in warmadv cases contributed to a 33% (69 W m−2) increase in downward longwave (LW) fluxes compared to cloud-free conditions. |
| Databáze: | OpenAIRE |
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