Statistical Characterization of the Observed Cold Wake Induced by North Atlantic Hurricanes

摘要: This work quantifies the magnitude, spatial structure, and temporal evolution of cold wake left by North Atlantic hurricanes. To this end we composited sea surface temperature anomalies (SSTA) induced hurricane observations from 2002 to 2018 derived international best track archive for climate stewardship (IBTrACS). Cold characteristics were distinguished a set oceanic properties: Hurricane translation speed intensity, upper ocean stratification represented two barrier layer metrics: Barrier thickness (BLT) potential energy (BLPE). The contribution above properties amplitude was analyzed individually in combination. mean magnitude hurricane-induced cooling 1.7 °C when all hurricanes without any distinction considered, largest found slow-moving, strong passing over thinner layers, with 3.5 respect pre-storm (SST) conditions. On average needed about 60 days disappear experienced decay first 20 days, had decreased 80%. Differences between wakes yielded mostly infrared merged microwave remote sensed SST data also evaluated, an overall relative underestimation 0.4 infrared-mostly data.