This title appears in the Scientific Report :
2023
Please use the identifier:
http://dx.doi.org/10.5194/egusphere-egu23-15602 in citations.
Differences in microphysical properties of cirrus at high and mid latitudes from airborne measurements
Differences in microphysical properties of cirrus at high and mid latitudes from airborne measurements
Cirrus in mid latitudes (<= 60° N) are often affected by aviation and pollution while cirrus in high latitudes (> 60° N) develop in a more pristine atmosphere. In this study, we compare the microphysical properties of cirrus measured in mid latitudes and cirrus measured in high latitudes. The...
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Personal Name(s): | De La Torre Castro, Elena (Corresponding author) |
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Jurkat-Witschas, Tina / Afchine, Armin / Hahn, Valerian / Kirschler, Simon / Krämer, Martina / Lucke, Johannes / Spelten, Nicole / Wernli, Heini / Zöger, Martin / Voigt, Christiane | |
Contributing Institute: |
Stratosphäre; IEK-7 |
Imprint: |
2023
|
DOI: |
10.5194/egusphere-egu23-15602 |
Conference: | EGU General Assembly 2023, Vienna (Austria), 2023-04-23 - 2023-04-28 |
Document Type: |
Abstract |
Research Program: |
Climate Feedbacks |
Publikationsportal JuSER |
Cirrus in mid latitudes (<= 60° N) are often affected by aviation and pollution while cirrus in high latitudes (> 60° N) develop in a more pristine atmosphere. In this study, we compare the microphysical properties of cirrus measured in mid latitudes and cirrus measured in high latitudes. The analyzed properties are: the ice crystal number concentration (N), effective diameter (ED) and ice water content (IWC) of cirrus from in situ measurements during the CIRRUS-HL campaign in June and July 2021. We use a combination of cloud probes covering ice crystals sizes between 2 and 6400 µm. The differences in cirrus properties are investigated with dependence on altitude and latitude and we show that there exist differences between mid-latitude and high-latitude cirrus. An increase in ED and a reduction in N is observed in high-latitude cirrus compared to mid-latitude cirrus.In order to investigate the cirrus properties in relation to the region of formation, we also combine our measurements with 10-day backward trajectories to identify the location of cirrus formation and the cirrus type: in situ or liquid origin cirrus. According to the latitude of cloud formation and latitude of the measurement, we classify the cirrus in three groups: cirrus formed and measured at mid latitudes (M-M), cirrus formed at mid latitudes and measured at high latitudes (M-H) and cirrus formed and measured at high latitudes (H-H). This analysis shows that part of the cirrus measured at high latitudes are actually formed at mid latitudes and therefore influenced by mid-latitude air masses. We discuss the differences of the cirrus properties under this new classification. Our study helps to advance the understanding of upper-tropospheric cirrus properties at mid and high latitudes in summer and the influence of anthropogenic perturbations. |