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| Titel |
Investigation of Arctic mixed-phase clouds during VERDI and RACEPAC: Combining airborne remote sensing and in situ observations |
| VerfasserIn |
André Ehrlich, Manfred Wendisch |
| Konferenz |
EGU General Assembly 2015
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 17 (2015) |
| Datensatznummer |
250105723
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| Publikation (Nr.) |
 EGU/EGU2015-5267.pdf |
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| Zusammenfassung |
| To improve our understanding of Arctic mixed-phase clouds in sea-ice covered areas the
airborne research campaign Vertical distribution of ice in Arctic mixed-phase clouds
(VERDI, April/May 2012) and the Radiation-Aerosol-Cloud Experiment in the Arctic Circle
(RACEPAC, April/May 2014) were initiated by a collaboration of German and French
research institutes. The aircraft operated by the Alfred Wegener Institute for Polar and Marine
Research, Germany were based in Inuvik, Canada from where the research flights of in
total 149 flight hours (62 h during VERDI, 87 h during RACEPAC) were able to
cover a wide area above the Canadian Beaufort. The aim of both campaigns was to
combine remote sensing and in-situ cloud, aerosol and trace gas measurements to
investigate interactions between radiation, cloud and aerosol particles. Remote sensing
instrumentation contained a backscatter lidar and spectral solar radiation measurements
including a hyperspectral camera. In-situ sampling was highlighted by a suit of
comprehensive cloud particle probes, aerosol particle counters and mass spectroscopy
as well as trace gas detectors. While during VERDI remote sensing and in-situ
measurements were performed by one aircraft (Polar 5) subsequently, for RACEPAC two
identical aircraft (Polar 5 & 6, Basler BT-67) were coordinated at different altitudes to
horizontally collocate both remote sensing and in-situ measurements. In this way
not only the combined analysis of radiative and microphysical processes in the
clouds can by studied more reliably, also remote sensing methods can be validated
efficiently.
Here we will illustrate the scientific strategy of both projects including instrumentation
and flight patterns of the research flights. Beside flight missions dedicated to sample low level
clouds by remote sensing and in situ probing, flights were also coordinated with satellite
overpasses and ground based stations. Exemplary results will be highlighted. |
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