Large-Scale Structure of Forcing Data Derived from GoAmazon2014/5 Experiment
Poster PDF
Authors
Shuaiqi Tang — Pacific Northwest National Laboratory
Shaocheng Xie — Lawrence Livermore National Laboratory
Yunyan Zhang — Lawrence Livermore National Laboratory
Courtney Schumacher — Texas A&M University
Minghua Zhang — Stony Brook University
Michael Jensen — Brookhaven National Laboratory
Karen Lee Johnson — Brookhaven National Laboratory
Meng Wang — Brookhaven National Laboratory
Maike Ahlgrimm — Deutscher Wetterdienst
Zhe Feng — Pacific Northwest National Laboratory
Category
GoAmazon – Clouds and aerosols in Amazonia
Description
The Observations and Modeling of the Green Ocean 2014-2015 (GoAmazon2014/5) field campaign is an international collaborated experiment conducted near Manaus, Brazil from January 2014 through December 2015. This experiment is designed to enable the study of aerosols, clouds, convections and their interactions over tropical rainforest. To support modeling studies of these processes with data collected from the GoAmazon2014/5 campaign, we have developed the large-scale forcing data (e.g., vertical velocities and advective tendencies) during two intensive operational periods (IOP) in 2014 for the GoAmazon domain (110km radius), and for three sub-domains to study the sub-grid variability. Three types of precipitating systems in the wet season (IOP1) were identified: afternoon scattered convections, westward propagating systems, and eastward propagating systems. Case study shows that the large-scale structures are substantially different for these three types of systems. The afternoon scattered convection is more dominated by local surface fluxes, with low-level heat and moisture source. The propagating systems are dominated by horizontal advections with large condensative heat source and moisture sink throughout the troposphere. The eastward propagating system has longer lifetime over the GoAmazon domain with mid-to-high precipitating clouds remaining for several hours after the system passage, while the westward propagating system passes the domain faster with shorter-time remnant of high clouds. The seasonal variability and diurnal cycle of the large-scale structure of vertical velocity, apparent heating and drying were also analyzed.
