Publication Abstracts

Naud et al. 2021

Naud, C.M., J.A. Crespo, and D.J. Posselt, 2021: On the relationship between CYGNSS surface heat fluxes and the lifecycle of low-latitude ocean extratropical cyclones. J. Appl. Meteorol. Climatol., 60, no. 11, 1575-1590, doi:10.1175/JAMC-D-21-0074.1.

Surface latent and sensible heat fluxes are important for extratropical cyclone evolution and intensification. Because extratropical cyclone genesis often occurs at low latitudes, Cyclone Global Navigation Satellite System (CYGNSS) surface latent and sensible heat flux retrievals are composited to provide a mean picture of their spatial distribution in low-latitude oceanic extratropical cyclones. CYGNSS heat fluxes are not affected by heavy precipitation and offer observations of storms with frequent revisit times. Consistent with prior results obtained for cyclones in the Gulf Stream region, the fluxes are strongest in the wake of the cold fronts and are weakest to negative in the warm sector in advance of the cold fronts. As cyclone strength increases or mean precipitable water decreases, the maximum in surface heat fluxes increases while the minimum decreases. This affects the changes in fluxes during cyclone intensification: the post-cold-frontal surface heat flux maximum increases as a result of the increase in near-surface winds. During cyclone dissipation, the fluxes in this sector decrease because of the decrease in winds and in temperature and humidity contrast. The warm-sector minimum decreases throughout the entire cyclone lifetime and is mostly driven by sea-air temperature and humidity contrast changes. However, during cyclone dissipation, the surface heat fluxes increase along the cold front in a narrow band to the east, independent from changes in the cyclone characteristics. This result suggests that, during cyclone dissipation, energy transfers from the ocean to the atmosphere are linked to frontal processes in addition to synoptic-scale processes.

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BibTeX Citation

@article{na00500y,
  author={Naud, C. M. and Crespo, J. A. and Posselt, D. J.},
  title={On the relationship between CYGNSS surface heat fluxes and the lifecycle of low-latitude ocean extratropical cyclones},
  year={2021},
  journal={J. Appl. Meteorol. Climatol.},
  volume={60},
  number={11},
  pages={1575--1590},
  doi={10.1175/JAMC-D-21-0074.1},
}

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RIS Citation

TY  - JOUR
ID  - na00500y
AU  - Naud, C. M.
AU  - Crespo, J. A.
AU  - Posselt, D. J.
PY  - 2021
TI  - On the relationship between CYGNSS surface heat fluxes and the lifecycle of low-latitude ocean extratropical cyclones
JA  - J. Appl. Meteorol. Climatol.
VL  - 60
IS  - 11
SP  - 1575
EP  - 1590
DO  - 10.1175/JAMC-D-21-0074.1
ER  -

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