Predicted cloud droplet numbers (kappa=0.25)...
In-situ measurements of aerosol size distributions along with updraft velocities collected from a wind Doppler Lidar are coupled with a state-of-the art droplet activation parameterization (Morales and Nenes, 2014) to determine the cloud droplet number and maximum in-cloud supersaturation that can potentially form over the Davos Wolfgang station between February 24 and March 8 2019. For this, as a sensitivity test, a hygroscopicity parameter of 0.25 is assumed, which is the upper limit determined from the analysis carried out for Weissfluhjoch (https://www.envidat.ch/dataset/ccn-hygroscopicity-predicted-cloud-droplet-numbers-weissfluhjoch). The data file contains:
- Date and time (DD/MM/YYYY hh:mm:ss) in UTC
- The wind-lidar derived standard deviation of updraft velocities (sigma-w) in m/s, used to apply the parameterization employing a single characteristic velocity (Morales and Nenes, 2010)
- The maximum predicted cloud parcel supersaturation (Smax%)
- The total in-situ aerosol number concentration (Naer) in cmˉ³, measured by the SMPS
- The predicted cloud droplet numbers (Nd) in cmˉ³
- The activation fraction (%)
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Additional Information
| Field | Value |
|---|---|
| Data last updated | June 15, 2021 |
| Metadata last updated | December 16, 2025 |
| Created | June 15, 2021 |
| Format | CSV |
| Identifier (Permalink) | predicted-cloud-droplet-numbers-davos-wolfgang.b5c4c596-2dd4-45f4-b79f-61f91d82aad0 |
| Issued date | December 12, 2020 |
| Modified date | December 12, 2020 |
| Languages | English |
| Access URL | https://www.envidat.ch/dataset/predicted-cloud-droplet-numbers-davos-wolfgang/resource/b5c4c596-2dd4-45f4-b79f-61f91d82aad0 |
| License (Terms of use) | Non-commercial Allowed / Commercial Allowed / Reference Required |
| Format | CSV |
| Coverage | - |
| Documentation | - |
| Access service | - |
| Temporal Resolution | - |
| Byte size | 313,834 |
| Datastore active | False |
| Datastore contains all records of source file | False |
| Display name | Predicted cloud droplet numbers (kappa=0.25) Weissfluhjoch |
| Has views | False |
| Id | 9e706b4c-e1ad-48d1-a7a3-8040e9510c26 |
| Identifier | predicted-cloud-droplet-numbers-davos-wolfgang.b5c4c596-2dd4-45f4-b79f-61f91d82aad0 |
| Issued | 2020-12-12T09:30:37+00:00 |
| Language | ['en'] |
| License | https://opendata.swiss/terms-of-use#terms_by |
| Media type | text/csv |
| Modified | 2020-12-12T09:30:36+00:00 |
| Package id | 6650972d-b8f6-426b-a731-2f210d7c61d2 |
| Position | 1 |
| Rights | https://opendata.swiss/terms-of-use#terms_by |
| State | active |
| Title | Predicted cloud droplet numbers (kappa=0.25) Weissfluhjoch |
| Uri | https://www.envidat.ch/dataset/predicted-cloud-droplet-numbers-davos-wolfgang/resource/b5c4c596-2dd4-45f4-b79f-61f91d82aad0 |