Wind Speed, Surface Flux, and Intraseasonal Convection Coupling From CYGNSS Data

Bui, Hien X.; Maloney, Eric D.; Riley Dellaripa, Emily M.; Singh, Bohar

doi:10.1029/2020GL090376

i

Wind Speed, Surface Flux, and Intraseasonal Convection Coupling From CYGNSS Data

2020
By: Bui, Hien X. ; Maloney, Eric D. ; Riley Dellaripa, Emily M.
Source: Geophysical Research Letters, 47(21)

Details

Journal Title:

Geophysical Research Letters
Personal Author:

Bui, Hien X. ; Maloney, Eric D. ; Riley Dellaripa, Emily M. ; Singh, Bohar
NOAA Program & Office:

CPO (Climate Program Office) ; OAR (Oceanic and Atmospheric Research)
Description:

This study analyzes wind speed and surface latent heat flux anomalies from the Cyclone Global Navigation Satellite System (CYGNSS), aiming to understand the physical mechanisms regulating intraseasonal convection, particularly associated with the Madden-Julian oscillation (MJO). An advantage of CYGNSS compared to other space-based data sets is that its surface wind speed retrievals have reduced attenuation by precipitation, thus providing improved information about the importance of wind-induced surface fluxes for the maintenance of convection. Consistent with previous studies from buoys, CYGNSS shows that enhanced MJO precipitation is associated with enhanced wind speeds, and that associated surface heat flux anomalies have a magnitude about 7–12% of precipitation anomalies. Thus, latent heat flux anomalies are an important maintenance mechanism for MJO convection through the column moist static energy budget. A composite analysis during boreal summer over the eastern north Pacific also supports the idea that wind-induced surface flux is important for MJO maintenance there.
Keywords:
Source:

Geophysical Research Letters, 47(21)
DOI:

https://doi.org/10.1029/2020GL090376
Document Type:

Journal Article
Funding:

Grant no. NA18OAR4310299
Rights Information:

Other
Compliance:

Submitted
Download URL:

https://repository.library.noaa.gov/view/noaa/32936/noaa_32936_DS1.pdf
File Type:

[PDF - 904.54 KB]
Collection(s):

Office of Oceanic and Atmospheric Research (OAR)
Main Document Checksum:

urn:sha256:6d45c984aa8cf6213c2b0bc55acaa5f01b0cea1a107e32174bde53890bba9e87

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