| Full text | |
| Author(s): |
Biscaro, Thiago S.
[1]
;
Machado, Luiz A. T.
[2, 1]
;
Giangrande, Scott E.
[3]
;
Jensen, Michael P.
[3]
Total Authors: 4
|
| Affiliation: | [1] Natl Inst Space Res, Meteorol Satellites & Sensors Div, BR-12630000 Cachoeira Paulista, SP - Brazil
[2] Max Planck Inst Chem, Multiphase Chem Dept, D-55128 Mainz - Germany
[3] Brookhaven Natl Lab, Environm & Climate Sci Dept, Upton, NY 11973 - USA
Total Affiliations: 3
|
| Document type: | Journal article |
| Source: | Atmospheric Chemistry and Physics; v. 21, n. 9, p. 6735-6754, MAY 5 2021. |
| Web of Science Citations: | 0 |
| Abstract | |
This study offers an alternative presentation regarding how diurnal precipitation is modulated by convective events that developed over the central Amazon during the preceding nighttime period. We use data collected during the Observations and Modelling of the Green Ocean Amazon (GoAmazon 2014/2015) field campaign that took place from 1 January 2014 to 30 November 2015 in the central Amazon. Local surface-based observations of cloud occurrence, soil temperature, surface fluxes, and planetary boundary layer characteristics are coupled with satellite data to identify the physical mechanisms that control the diurnal rainfall in central Amazon during the wet and dry seasons. This is accomplished through evaluation of the atmospheric properties during the nocturnal periods preceding raining and non-raining events. Comparisons between these non-raining and raining transitions are presented for the wet (January to April) and dry (June to September) seasons. The results suggest that wet-season diurnal precipitation is modulated by nighttime cloud coverage and local influences such as heating induced turbulence, whereas the dry-season rain events are controlled by large-scale circulations. (AU) | |
| FAPESP's process: | 09/15235-8 - Cloud processes of the main precipitation systems in Brazil: a contribution to cloud resolving modeling and to the GPM (Global Precipitation Measurement) |
| Grantee: | Luiz Augusto Toledo Machado |
| Support Opportunities: | Research Projects - Thematic Grants |
| FAPESP's process: | 15/14497-0 - Nowcasting of intense thunderstorms and understanding of the physical processes inside clouds: the SOS-CHUVA (Severe Weather Observation System) |
| Grantee: | Luiz Augusto Toledo Machado |
| Support Opportunities: | Research Program on Global Climate Change - Thematic Grants |