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Vasubandhu Misra and Amit Bhardwaj

transition from the preonset ( Fig. 4a ) to postonset ( Fig. 4c ) period of the NEM is apparent across India as the temperatures drop after the onset day (day 0; Fig. 4b ). The 850-hPa wind pattern in Fig. 4b suggests that the Arabian Sea and southern peninsular India is dominated by cyclonic flow at the time of onset of the NEM (day 0). Furthermore, in the buildup to the onset of the NEM season, the magnitude of the wind speed in the Somali jet shown at 850 hPa peaks ( Fig. 4b ). This is discerned by

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Johna E. Rudzin, Lynn K. Shay, and Benjamin Jaimes de la Cruz

atmospheric profiles of air temperature, wind speed, wind direction, and relative humidity ( Hock and Franklin 1999 ). Real-time data are postprocessed using NCAR’s Atmospheric Software Processing Environment (ASPEN) software, which quality controls each dropsonde sounding. Daily satellite-based blended level 4 SST analyses from the Jet Propulsion Laboratory PODAAC Group for High Resolution Sea Surface Temperature (GHRSST) Level 4 MUR ( JPL MUR MEaSUREs Project 2010 ) are used within the air–sea flux

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Patrik Benáček and Máté Mile

separated the forecast error into three vertical layers: 1000–800 hPa (dominated by boundary layers and surface effects), 800–400 hPa (middle troposphere), and 400–100 hPa (upper troposphere to lower stratosphere including tropopause and upper-level jet maxima). a. VarBC initialization Figure 6 presents a comparison of the mean of bias coefficients calculated after their initialization from 15 October to 30 November 2015. Note that bias coefficients are comparable between all VarBC-LAM methods NBG5000

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