The satellite-based cloud condensation nuclei (CCN) proxies used to quantify the aerosolcloud
interactions (ACIs) are column integrated and do not guarantee the vertical co-location of
aerosols and clouds. This has encouraged the use of height-resolved measurements of spaceborne
lidars for ACI studies and led to advancements in lidar-based CCN retrieval algorithms. In this
study, we present a comparison between the number concentration of CCN (nCCN) derived from
ground-based in situ and spaceborne lidar cloud-aerosol lidar with orthogonal polarization (CALIOP)
measurements. On analysing their monthly time series, we found that about 88% of CALIOP
nCCN estimates remained within a factor of 1.5 of the in situ measurements. Overall, the CALIOP
estimates of monthly nCCN were in good agreement with the in situ measurements with a normalized
mean error of 71%, normalized mean bias of 39% and correlation coefficient of 0.68. Based on
our comparison results, we point out the necessary measures that should be considered for global
nCCN retrieval. Our results show the competence of CALIOP in compiling a global height- and
type-resolved nCCN dataset for use in ACI studies.
| Identifer | oai:union.ndltd.org:DRESDEN/oai:qucosa:de:qucosa:87749 |
| Date | 27 October 2023 |
| Creators | Choudhury, Goutam, Tesche, Matthias |
| Publisher | MDPI |
| Source Sets | Hochschulschriftenserver (HSSS) der SLUB Dresden |
| Language | English |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, doc-type:article, info:eu-repo/semantics/article, doc-type:Text |
| Rights | info:eu-repo/semantics/openAccess |
| Relation | 3342 |
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