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ORGANIZER;CN=Mark Bourassa:mailto:mbourassa@fsu.edu
DESCRIPTION;LANGUAGE=en-US:COAPS Short Seminar Series\n11:00 AM June 1st\nA
 ttend F2F (in 255 Research A) or Virtually (via Zoom)\nhttps://fsu.zoom.us
 /j/92268262553\n\nMeeting ID: 922 6826 2553\nTalks are 12 minutes long wit
 h an additional 8 minutes for questions.\n\nAnalysis of Extreme Minimum Te
 mperatures in the Southeast\nBy Hailey Long\nDescription: This project ana
 lyzes long-term trends in nighttime minimum temperatures across fifty weat
 her stations in the Southeastern United States from 1950–2025. Annual co
 unts of warm nights (minimum temperatures above 75°F)\, diurnal temperatu
 re range (DTR) values\, and some dew point temperature trends were examine
 d to investigate how nighttime warming has changed over time and across re
 gions. Results show widespread increases in warm nights and decreasing DTR
  slope values\, especially in southern coastal areas\, indicating that nig
 httime temperatures are rising faster than daytime temperatures and increa
 sing regional heat risk\, which may be due to increased atmospheric moistu
 re.\n\nDecomposing Atmospheric Response to Mesoscale Eddies: Roles of Ther
 mal Gradients and Air–Sea Temperature Contrast\nBy Marco Larranaga\nDesc
 ription: Mesoscale eddies strongly modulate the overlying atmosphere throu
 gh air-sea thermal feedbacks\, yet the relative roles of sea surface tempe
 rature (SST) gradients and air-sea temperature contrast remain difficult t
 o disentangle. Here\, we quantify the atmospheric response over composite 
 warm and cold mesoscale eddies using five years of global observations of 
 wind stress and SST\, together with near-surface atmospheric temperature f
 rom ERA5. At each grid point of the composite eddies\, we estimate multiva
 riate linear and robust regression models to derive coupling coefficients 
 linking wind stress curl and divergence to along-wind and cross-wind SST g
 radients\, as well as to the air–sea temperature difference. For wind st
 ress curl\, we find a strong intercept term\, comparable in magnitude to t
 he cross-wind SST gradient coupling coefficient. The remaining thermal cou
 pling coefficients are weak for both warm and cold eddies. The large inter
 cept suggests that wind stress curl is substantially influenced by process
 es not explicitly represented by SST gradients or air–sea temperature co
 ntrast\, likely reflecting the contribution of current feedback\, which ca
 n independently generate curl anomalies over mesoscale eddies. In contrast
 \, wind stress divergence exhibits a small intercept\, a dominant along-wi
 nd SST gradient coupling coefficient\, and a secondary but significant con
 tribution from the air–sea temperature difference\, while the cross-wind
  SST gradient contribution is negligible. These results indicate that wind
  stress curl–based coupling coefficients may be partially contaminated b
 y current feedback\, complicating their interpretation as purely thermal a
 tmospheric responses. Wind stress divergence\, on the other hand\, provide
 s a cleaner diagnostic of thermal feedback over mesoscale eddies.\n\nNOTE:
  Please feel free to forward/share this invitation with other groups/disci
 plines that might be interested in this talk/topic. All are welcome to att
 end.\n
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SUMMARY;LANGUAGE=en-US:COAPS Short Seminar Series
DTSTART;TZID=Eastern Standard Time:20260601T110000
DTEND;TZID=Eastern Standard Time:20260601T120000
CLASS:PUBLIC
PRIORITY:5
DTSTAMP:20260528T154219Z
TRANSP:OPAQUE
STATUS:CONFIRMED
SEQUENCE:1
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