User:WieKir/sandbox

= EUREC4A = EUREC4A (, often stylized as EUREC⁴A) was a field campaign, designed to study the impact of dynamic and thermodynamic properties of environment on the macrophysical properties of trade cumulus clouds. It took place in the lower Atlantic trades, over the ocean east of Barbados from January 20 to February 20, 2020.

During the campaign shipborne, airborne and ground-based measurements were performed with satellite remote sensing and weather and climate modelling data being simultaneously analysed.

The data obtained during the EUREC4A field campaign is freely available on the official web-site.

Structure
The EUREC4A field campaign was a joint effort of various institutes from Europe, Carribean and USA. The USA contribution was called ATOMIC (Atlantic Tradewind Ocean–Atmosphere Mesoscale Interaction Campaign).

The airborne measurements were performed by 4 research aircrafts:


 * HALO (Gulfstream G550, DLR, Germany),
 * ATR 42 (SAFIRE, France),
 * Twin Otter (British Antarctic Survey, UK),
 * WP-3D Orion (NOAA, USA).

The seaborne measurements were performed by 4 research vessels:


 * RV Meteor (BMBF, Germany),
 * RV Maria S. Merian (State of Mecklenburg-Vorpommern, Germany),
 * RV L'Atalante (IFREMER, France),
 * RV Ronald H. Brown (NOAA, USA).

Extensive measurements were also performed in the ground-based Barbados Cloud Observatory (including launch of thousands of radiosondes) and using unmanned vehicles (including gliders and helikites). Additionally, large network of water isotopic measurements was organised.

Aim and Results
The general aim of EUREC4A was to investigate the impact of clouds on climate. At the time of campaign climate models were giving different estimates of climate sensitivity, and lack of understanding the mechanisms of cloud feedback could be a reason for it. Additionally, the processes of rain formation and air-sea interaction were investigated.

The data obtained during the campaign was used to improve climate models and remote sensing data analysis algorithms. It allowed to study various phenomena, such as cold pools, clouds structure, trade winds, Saharan dust transport, etc.