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The Green Ocean: Precipitation Insights from the GoAmazon2014/5 experiment

Journal Article · · Atmospheric Chemistry and Physics
 [1];  [1];  [1];  [2];  [2];  [3];  [4]
  1. Brookhaven National Laboratory
  2. BATTELLE (PACIFIC NW LAB)
  3. Snow College
  4. Instituto Nacional de Pesquisas Espaciais (INPE)
+ Show Author Affiliations

This study summarizes the precipitation properties collected during the GoAmazon2014/5 campaign near Manaus in central Amazonia, Brazil. Precipitation breakdowns, summary radar rainfall relationships and self-consistency concepts from a coupled disdrometer and radar wind profiler measurements are presented. The properties of Amazon cumulus and associated stratiform precipitation are discussed, including segregations according to seasonal (Wet/Dry regime) variability, 5 cloud echo-top height and possible aerosol influences on the apparent oceanic characteristics of the precipitation drop size distributions. Overall, we observe that the Amazon precipitation straddles behaviors found during previous U.S. Department of Energy Atmospheric Radiation Measurements program (ARM) tropical deployments, with distributions favoring higher concentrations of smaller drops than ARM continental examples. Oceanic type precipitation characteristics are predominantly observed during the Amazon Wet seasons. An exploration of the controls on Wet season precipitation properties reveals that 10 wind direction, as compared with other standard radiosonde thermodynamic parameters or aerosol count/regime classifications performed at the ARM site, provides a good indicator for those Wet season Amazon events having an oceanic character for their precipitation drop size distributions.

Research Organization:
Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
AC05-76RL01830
OSTI ID:
1605429
Report Number(s):
PNNL-SA-132060
Journal Information:
Atmospheric Chemistry and Physics, Vol. 18, Issue 12
Country of Publication:
United States
Language:
English

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Cited By (7)

Mesoscale convective systems over the Amazon basin: The GoAmazon2014/5 program June 2019
Thresholds for Atmospheric Convection in Amazonian Rainforests August 2019
Validation of GPM Precipitation Products by Comparison with Ground-Based Parsivel Disdrometers over Jianghuai Region June 2019
Overview: Precipitation characteristics and sensitivities to environmental conditions during GoAmazon2014/5 and ACRIDICON-CHUVA January 2018
X-band dual-polarization radar-based hydrometeor classification for Brazilian tropical precipitation systems January 2019
Morning boundary layer conditions for shallow to deep convective cloud evolution during the dry season in the central Amazon September 2021
The development of rainfall retrievals from radar at Darwin January 2021

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Related Subjects

GOAmazon2014/15
precipitation properties
radar rainfall relationships
coupled disdrometer
radar wind profiler
Amazon cumulus
cloud echo-top height
aerosol influences
ARM program
wet season precipitation
radiosonde thermody