ENSO-induced co-variability of Salinity, Plankton Biomass and Coastal Currents in the Northern Gulf of Mexico

Gomez, Fabian A.; Lee, Sang-Ki; Hernandez, Frank J.; Chiaverano, Luciano M.; Muller-Karger, Frank E.; Liu, Yanyun; Lamkin, John T.

doi:10.1038/s41598-018-36655-y

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ENSO-induced co-variability of Salinity, Plankton Biomass and Coastal Currents in the Northern Gulf of Mexico

2019
By Gomez, Fabian A. ; Lee, Sang-Ki ; Hernandez, Frank J. ; ...
Source: Scientific Reports, 9, 178.

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Journal Title:

Scientific Reports
Personal Author:

Gomez, Fabian A. ; Lee, Sang-Ki ; Hernandez, Frank J. ; Chiaverano, Luciano M. ; Muller-Karger, Frank E. ; ... More +

Gomez, Fabian A. ; Lee, Sang-Ki ; Hernandez, Frank J. ; Chiaverano, Luciano M. ; Muller-Karger, Frank E. ; Liu, Yanyun ; Lamkin, John T. Less -
NOAA Program & Office:

OAR (Oceanic and Atmospheric Research) ; NMFS (National Marine Fisheries Service) ; NESDIS (National Environmental Satellite, Data, and Information Service) ; NWS (National Weather Service) ; AOML (Atlantic Oceanographic and Meteorological Laboratory) ; ... More +

OAR (Oceanic and Atmospheric Research) ; NMFS (National Marine Fisheries Service) ; NESDIS (National Environmental Satellite, Data, and Information Service) ; NWS (National Weather Service) ; AOML (Atlantic Oceanographic and Meteorological Laboratory) ; OST (Office of Science and Technology) ; JPSS (Joint Polar Satellite System Program Office)O ; OMB (Office of Management and Budget) ; OBS (Office of Observations) ; NCEP (National Centers for Environmental Prediction) ; CIRA (Cooperative Institute for Research in the Atmosphere) ; CIMSS (Cooperative Institute for Meteorological Satellite Studies) ; NGI (Northern Gulf Institute) Less -
Description:

This study investigates the role of the parameterized boundary layer structure in hurricane intensity change using two retrospective HWRF forecasts of Hurricane Earl (2010) in which the vertical eddy diffusivity K-m was modified during physics upgrades. Earl undergoes rapid intensification (RI) in the low-K-m forecast as observed in nature, while it weakens briefly before resuming a slow intensification at the RI onset in the high-K-m forecast. Angular momentum budget analysis suggests that K-m modulates the convergence of angular momentum in the boundary layer, which is a key component of the hurricane spinup dynamics. Reducing K-m in the boundary layer causes enhancement of both the inflow and convergence, which in turn leads to stronger and more symmetric deep convection in the low-K-m forecast than in the high-K-m forecast. The deeper and stronger hurricane vortex with lower static stability in the low-K-m forecast is more resilient to shear than that in the high-K-m forecast. With a smaller vortex tilt in the low-K-m forecast, downdrafts associated with the vortex tilt are reduced, bringing less low-entropy air from the midlevels to the boundary layer, resulting in a less stable boundary layer. Future physics upgrades in operational hurricane models should consider this chain of multiscale interactions to assess their impact on model RI forecasts.
Source:

Scientific Reports, 9, 178.
DOI:

https://doi.org/10.1038/s41598-018-36655-y
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Journal Article
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CC BY
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Submitted
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urn:sha256:4fa754699c7f8060f49810fe15659e4778017e992fb63ea598aead306611ae25
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https://repository.library.noaa.gov/view/noaa/20125/noaa_20125_DS1.pdf
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ENSO-induced co-variability of Salinity, Plankton Biomass and Coastal Currents in the Northern Gulf of Mexico

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