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Extratropical Cyclone Precipitation Life Cycles: A Satellite‐Based Analysis
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2018
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Source: Geophysical Research Letters, 45(16), 8647-8654
[PDF-868.50 KB]
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Journal Title:Geophysical Research Letters
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Description:Although extratropical cyclones are the most common midlatitude storms, the relationship between their precipitation life cycle and dynamical strength life cycle has not been thoroughly analyzed. Given that thermodynamic heat exchanges associated with precipitation impact cyclone circulation, there isa need to understand the precipitation/dynamics relationship. Based on Integrated Multi-satellitE Retrievals for Global Precipitation MeasurementGPM precipitation and Lagrangian cyclone tracks, the precipitation maximum occurs prior to the dynamical strength maximum 70% of the time. The lag in timing is consistentwith the difference in cyclone precipitable water vapor at the two peaks. Conditional subsetting of the cyclone composites shows that if the precipitable water vapor distribution is constrained to be equal throughout the composite life cycle, the precipitation peak occurs very near the time of the peak incyclone dynamical strength. Thus, the boost in dynamical strength caused by latent heat associated with
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Source:Geophysical Research Letters, 45(16), 8647-8654
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DOI:
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ISSN:0094-8276;1944-8007;
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Rights Information:Other
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